CN120834601A - Green electricity direct supply system and method for industrial parks - Google Patents

Abstract

The disclosure provides an industrial park green electricity direct supply system and method, and relates to the technical field of new energy. The system comprises a green electricity generation module, a green electricity transmission module, a load energy utilization module, a green energy storage module, a green energy supply module and a load energy utilization module, wherein the green electricity generation module is used for converting wind energy and solar energy to obtain green electricity energy, the green electricity energy storage module is combined for realizing adjustment and standby of the green electricity energy, the green electricity transmission module is used for realizing voltage level improvement and independently supplying load to a park, and the load energy utilization module is used for forming concentrated utilization of multiple loads such as electric power, heat energy, cold energy, hydrogen energy and oxygen, so that continuous and high-proportion green energy supply is realized. The method and the system can realize efficient direct supply from electric energy production to conveying in the park, improve the power supply stability of green electric energy, realize diversified load demands through various green energy sources, improve the energy utilization rate and the new energy consumption proportion, ensure source traceability and independence on an energy conveying path, and improve the energy utilization efficiency, the operation reliability and the green energy utilization compliance of the park.

Description

Industrial park green electricity direct supply system and method

Technical Field

The disclosure relates to the technical field of new energy, in particular to an industrial park green electricity direct supply system and method.

Background

In the current energy supply and utilization process of industrial parks, with the continuous expansion of industrial production scale and the increasing demand of diversified energy, energy systems face more complex challenges. The traditional industrial park energy supply mode mainly depends on the unified power supply of a public power grid and is supplemented by partial conventional energy, and the mode can meet basic production and living demands in early stages, but limitations of the mode are gradually revealed when facing the high-density, all-weather and multi-type load demands of a modern park.

The centralized power supply of the public power grid is easy to cause electric energy loss in the long-distance conveying process, the power supply stability is insufficient under the condition of large load fluctuation, the power supply is in tension in the peak period, waste is easily formed in the valley period, the energy structure takes electric power as a single main body, diversified load demands such as heat energy, cold energy, hydrogen energy, oxygen and the like are difficult to meet, the whole operation cost of a park is higher, the energy utilization rate is poor, distributed new energy is applied to part of parks, but the application is limited by the lack of an effective load matching mechanism, the contradiction between the fluctuation of the new energy output and the uncertainty of the load demand is outstanding, the wind discarding and light discarding problems are still serious, the energy conveying link generally depends on the public power grid to transfer, and the advantages are difficult to obtain in green authentication and low-carbon competition. Therefore, the related technology still has obvious defects in the aspects of power supply stability, energy diversified utilization, efficient clean energy consumption, green energy supply and the like.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the embodiment of the disclosure is to provide an industrial park green electricity direct supply system and an industrial park green electricity direct supply method, so that power supply stability of new energy sources can be improved, energy utilization efficiency is improved, multiple loads are met, new energy source consumption proportion is improved, and green energy utilization compliance is enhanced.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

According to a first aspect of embodiments of the present disclosure, there is provided an industrial park green electricity direct supply system, comprising:

The green electricity generation module is used for converting the received wind energy and solar energy and outputting green electricity energy, and the green electricity energy determines a distribution path according to the real-time load demand of the industrial park;

the green electricity energy storage module is connected with the green electricity generation module and used for receiving and storing the green electricity energy when the green electricity energy output of the green electricity generation module is higher than the real-time load demand of the load energy utilization module, and releasing the stored green electricity energy when the green electricity energy output of the green electricity generation module is lower than the real-time load demand;

The green electricity transmission module is connected with the green electricity generation module and the green electricity energy storage module and is used for receiving green electricity energy directly supplied by the green electricity generation module and green electricity energy released by the green electricity energy storage module, carrying out voltage grade lifting on the received green electricity energy and supplying power to the load energy utilization module through a special power transmission line independent of a power grid;

And the load energy utilization module is connected with the green electricity conveying module and is used for receiving the green electricity energy conveyed by the green electricity conveying module and carrying out energy supply scheduling on different types of loads according to the production operation conditions of the industrial park.

In some example embodiments of the present disclosure, based on the foregoing scheme, the green electricity generation module includes:

the wind power generation unit is used for converting the received wind energy into green electric energy through the wind power generation assembly;

The photovoltaic power generation unit is used for converting the received solar energy into green electric energy through the photovoltaic module;

the photo-thermal power generation unit is used for converting received solar energy into green electric energy by heating working media through the heat collection assembly, and extracting steam after partial power generation is completed for heat load of the industrial park;

The biomass power generation unit is used for converting heat energy generated by burning or gasifying biomass raw materials into green electric energy, combining green carbon dioxide serving as a byproduct with green hydrogen to synthesize green methanol for alcohol load of the industrial park;

The wind power generation unit, the photovoltaic power generation unit, the photo-thermal power generation unit and the biomass power generation unit are connected into the green electricity energy storage module in parallel, so that stable output power is realized based on complementary characteristics.

In some example embodiments of the present disclosure, based on the foregoing aspects, the green electricity storage module includes:

The electrochemical energy storage unit is used for charging when the green electricity energy output of the green electricity generation module is higher than the real-time load demand of the industrial park, and discharging when the green electricity energy output is lower than the real-time load demand;

The green hydrogen preparation unit is used for preparing green hydrogen and green oxygen through surplus green electric energy when the green electric energy output of the green electricity generation module is higher than the real-time load demand of an industrial park, collecting and storing the prepared green hydrogen and green oxygen, and taking part of green hydrogen as the input of the green electricity generation module to synthesize green methanol;

and the hydrogen energy storage unit is connected with the green hydrogen preparation unit and is used for converting the green hydrogen into electric energy when the electricity shortage condition exists in the industrial park and recovering heat energy in the conversion process for the park to use.

In some example embodiments of the present disclosure, the green hydrogen production unit includes at least one of an alkaline electrolyzed water hydrogen production apparatus and a proton exchange membrane electrolyzed water hydrogen production apparatus based on the foregoing aspects.

In some example embodiments of the present disclosure, based on the foregoing solution, the green oxygen generated in the hydrogen production process by the green hydrogen production unit is purified and compressed, stored, and transported to the load energy module and the green electricity generation module by a pipeline or a skid-mounted vehicle, so as to be used as a supply source of the industrial park oxygen load and a supply source of the green methanol synthesized by the green electricity generation module.

In some example embodiments of the present disclosure, based on the foregoing aspects, the hydrogen storage unit employs a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device for collecting waste heat energy generated in a conversion process while converting green hydrogen into green electric energy and supplying the waste heat energy to a thermal load of a campus when a waste heat energy utilization cost is lower than an electric heating cost of the load energy module.

In some example embodiments of the present disclosure, based on the foregoing aspects, the green electricity delivery module includes:

The booster station unit is used for selecting boosting configuration of corresponding voltage grades according to the installed scales of the green electricity generation module and the green electricity energy storage module, and boosting the voltage grade of green electricity energy to be conveyed through the boosting configuration;

and the power sending-out unit is connected with the booster station unit and is used for sending the green electric energy with the increased voltage level to the load energy module through a special power transmission line independent of the outside of the power grid after receiving the output of the booster station unit so as to ensure that the green electric energy is directly supplied by the industrial park in priority.

In some example embodiments of the present disclosure, based on the foregoing solutions, an access section of the power sending unit is connected to a boost line outlet of the booster station unit, and an output section of the power sending unit is connected to a variable booster station of the load energy module, so that a voltage level of green electric energy adjusted by the variable booster station meets a voltage level requirement of each electric device in the load energy module.

In some example embodiments of the present disclosure, based on the foregoing aspects, the load energy module includes an electrical load, a cold load, a heat load, a hydrogen load, an oxygen load, and an alcohol load, and is configured to receive green electrical energy, green hydrogen, green oxygen, and waste heat energy according to production operating conditions of the industrial park, forming a plurality of energy co-usage modes.

According to a second aspect of embodiments of the present disclosure, there is provided an industrial park green electricity direct supply method, comprising:

Converting wind energy and solar energy received by a green electricity generation module to generate green electricity energy, and determining a distribution path of the green electricity energy according to real-time load demands of the industrial park;

When the output of the green electric energy is lower than the real-time load demand, releasing the stored green electric energy from the green electric energy storage module;

the green electricity energy directly supplied by the green electricity generation module and the green electricity energy released by the green electricity energy storage module are received through the green electricity transmission module, the voltage level of the received green electricity energy is increased, and the power is supplied to the load energy utilization module through a special power transmission line independent of a power grid;

And when the load energy utilization module receives the green electric energy conveyed by the green electric conveying module, the green electric energy is scheduled to corresponding electric load, heat load, cold load, hydrogen load, oxygen load and alcohol load according to production operation conditions of a park.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

According to the industrial park green electricity direct supply system in the example embodiment of the disclosure, through forming organic connection of power generation, energy storage and transportation in the industrial park, continuity and stability of power supply can be maintained in the whole link process from generation to use of green electricity energy, further reliable support of park high-density load is realized, and the direct connection of energy sources among different links enables the green electricity energy to maintain higher effective utilization rate in the transmission process, so that the quality of park power supply is improved as a whole; the method has the advantages that the corresponding regulation relation between green electricity power supply and park load is established, the supply and demand difference in different time intervals can be effectively balanced, further, the energy utilization tends to be balanced logically, the continuous energy supply is realized while the occurrence of redundant electric energy waste is avoided, the park can synchronously obtain the dispatching of electric power, cold energy, heat energy and gas energy during operation through configuring the energy forms with different attributes on the energy constitution, so that multiple types of loads can obtain direct response, the flexibility of a system is improved, the park can absorb surplus electric energy in a new energy large-output stage through supply and demand matching logic under the condition of new energy access, smooth compensation is realized in a new energy shortage stage, the new energy consumption proportion is further improved, the stable characteristic of power supply is kept, the overall operation efficiency of the park is improved along with the diversified configuration of the energy forms, the optimization is formed on the resource utilization, the power transmission path is provided with a transmission mode independent of a public power grid, the source and the direction of electric energy can be ensured to be kept clear, the direct supply in the physical sense can be realized, the green power transmission quality is improved, the energy consumption of the park is not considered to be realized, and the green power transmission quality is not considered to be realized, but also makes the campus more competitive when facing the outside competition and green product market.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 schematically illustrates a structural schematic of an industrial park green electricity direct supply system, according to some embodiments of the present disclosure.

Fig. 2 schematically illustrates a schematic of an industrial park green electricity direct supply system and the structure of each module according to further embodiments of the present disclosure.

Fig. 3 schematically illustrates a flow diagram of an industrial park green electricity direct supply method, according to some embodiments of the present disclosure.

In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present description as detailed in the accompanying claims.

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

Moreover, the drawings are only schematic illustrations and are not necessarily drawn to scale. The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

In this exemplary embodiment, an industrial park green electricity direct supply system is provided first, which can be applied to various types of industrial parks, and is particularly suitable for production and operation scenarios with high energy consumption and multiple energy demands. The system can be applied to a computing center or a data center, can realize stable direct supply of large-scale power load and meet cooling or heating requirements through waste heat utilization, can support a production flow through comprehensive supply of power, hydrogen and oxygen and reduce carbon emission while ensuring continuous power supply in a traditional high-energy-consumption industrial park such as metallurgy, chemical industry and building materials, can realize green energy-consumption authentication through an independent green direct supply channel in a new energy equipment manufacturing or foreign trade export park, can improve the competitiveness of products in the international market, and can form an integral energy supply pattern of complementation of electricity, heat, cold, hydrogen and oxygen in the comprehensive industrial new city and a zero-carbon demonstration park so as to provide support for realizing green low-carbon conversion and sustainable development in the park.

Fig. 1 schematically illustrates a structural schematic of an industrial park green electricity direct supply system, according to some embodiments of the present disclosure. Referring to fig. 1, the industrial park green electricity direct supply system 100 may include a green electricity generation module 110, a green electricity storage module 120, a green electricity delivery module 130, and a load energy module 140. Wherein:

The green electricity generation module 110 may be configured to convert received wind energy to solar energy, and output green electricity energy, which may be used to determine a distribution path according to real-time load demands of an industrial park.

The real-time load requirement of the industrial park refers to the instant consumption total amount of electric energy by various production and matched facilities in the park in different time scales, and the forming sources comprise multi-dimensional superposition of the running power of electromechanical equipment, the load of data center calculation force, the heating or cooling requirement of the technological process, illumination, domestic electricity and the like. The monitoring of real-time load demand can be realized through the smart electric meter, the power sensor and the energy management terminal which are deployed at each level of nodes of the park distribution network, and the devices can collect voltage, current and power data at sampling intervals of seconds or minutes and transmit the data to the park energy management center for summarizing and analyzing through a communication network. In the analysis process, a load prediction algorithm and a trend identification model can be adopted to predict short-term fluctuation and medium-long term change, so that a real-time image of energy consumption of a park is formed, and the embodiment is not limited to the method.

The distribution path refers to an energy supply flow direction and a distribution mode selected according to the real-time load demand when the green electricity generation module outputs the generated green electricity. Specifically, when the current load of the park is monitored to be within the range of the renewable energy output capability, the distribution path can preferentially and directly transmit the green electric energy to the load energy utilization module through the booster station unit so as to realize direct supply, when the load is lower than the power generation output force, the distribution path can automatically switch part of the electric energy to flow to the green energy storage module 120 for storage so as to avoid power discarding, and when the load exceeds the power generation output force, the distribution path releases the green electric energy in the green energy storage module 120 and uniformly transmits the green electric energy to the load end after being overlapped with the current power generation output force. The distribution path may be implemented in dependence on control logic of a campus energy management system that may dynamically switch power flows based on real-time data and achieve physical switching of energy flow through coordinated control of circuit breakers, intelligent switches and inverters. In an alternative implementation, the adjustment of the distribution paths may also be combined with a priority policy, for example, to preferentially guarantee the supply of electric energy to critical production loads such as metallurgical furnaces and power center rooms, while secondary or deferrable loads are arranged in surplus power generation periods, or an artificial intelligence-based load scheduling algorithm may be introduced, so that the distribution paths are adjusted in a more prospective manner by predicting the production conditions and environmental change trends of the parks through big data, thereby reducing transient impacts and frequent switching, which is not particularly limited in this example embodiment.

The green electricity energy storage module 120 is connected to the green electricity generation module 110, and is configured to receive and store green electricity energy when the green electricity energy output of the green electricity generation module 110 is higher than the real-time load demand of the load energy consumption module 140, and release the stored green electricity energy when the green electricity energy output of the green electricity generation module 110 is lower than the real-time load demand.

When the system recognizes that the green power output of the green power generation module 110 is higher than the real-time load demand of the campus, the system may direct the surplus power to the green power storage module 120 via the current transformer for energy reception and storage. For example, the voltage and current of the battery pack can be regulated by the electrochemical energy storage unit in the green electricity energy storage module 120 through the charging controller, so that the battery pack can efficiently store electric energy in a rated working range, when the battery pack is configured in parallel, the green hydrogen preparation unit in the green electricity energy storage module 120 receives residual electric energy, the electrolytic water reaction is carried out through the electrolytic tank to prepare green hydrogen and green oxygen, the green hydrogen is led into the hydrogen energy storage unit in the green electricity energy storage module 120 for compression or storage in a storage tank, and part of green hydrogen can be conveyed to the biomass power generation unit for synthesizing green methanol, and meanwhile, the green oxygen is collected, purified and compressed for standby. The control strategy at this stage may be based on a real-time power balance model, so as to ensure that energy absorption of the green energy storage module 120 is preferentially realized when the electric energy is rich, so as to reduce the wind and light discarding phenomenon.

When the park load demand exceeds the power generation output of the green electricity generation module 110, the system triggers the green electricity storage module 120 to enter a discharge state. For example, the electrochemical energy storage unit in the green energy storage module 120 can be controlled to convert direct current into alternating current through an inverter and maintain consistency with voltage and frequency of a load side so as to directly supplement the power gap, the hydrogen energy storage unit in the green energy storage module 120 can be controlled to convert stored green hydrogen into electric energy through a hydrogen fuel cell or a hydrogen internal combustion engine and recover waste heat for park heat load in the energy conversion process, and the release logic is combined with the residual capacity, the battery Charge State of Charge (SOC), the green hydrogen storage capacity, the load demand priority and other factors of the green energy storage module 120 to comprehensively judge in the execution process so as to ensure the stability and safety of energy storage release.

The green electricity transmission module 130 is connected to the green electricity generation module 110 and the green electricity energy storage module 120, and is configured to receive the green electricity energy directly supplied by the green electricity generation module and the green electricity energy released by the green electricity energy storage module, and to perform voltage class boost on the received green electricity energy, and to supply power to the load energy consumption module through a dedicated power transmission line independent of the power grid. The voltage level improvement means that the green electric energy is regulated to a voltage level suitable for power transmission and load center access by the medium-low voltage output by the power generation end or the energy storage end through the voltage boosting device, so that the current intensity in the conveying process is reduced, the line loss is reduced, and the electric energy transmission distance is increased.

The load energy utilization module 140 is connected with the green electricity transmission module 130, and can be used for receiving the green electricity energy transmitted by the green electricity transmission module 130 and carrying out energy supply scheduling on different types of loads according to the production operation conditions of the industrial park.

According to the industrial park green electricity direct supply system in the example embodiment, through forming organic connection of power generation, energy storage and transportation in the range of the industrial park, the continuity and stability of power supply can be kept in the whole link process from generation to use of green electricity energy, further reliable support of park high-density load is realized, and the direct connection of energy sources among different links enables the green electricity energy to maintain higher effective utilization rate in the transmission process, so that the quality of park power supply is improved as a whole; the method has the advantages that the corresponding regulation relation between green electricity power supply and park load is established, the supply and demand difference in different time intervals can be effectively balanced, further, the energy utilization tends to be balanced logically, the continuous energy supply is realized while the occurrence of redundant electric energy waste is avoided, the park can synchronously obtain the dispatching of electric power, cold energy, heat energy and gas energy during operation through configuring the energy forms with different attributes on the energy constitution, so that multiple types of loads can obtain direct response, the flexibility of a system is improved, the park can absorb surplus electric energy in a new energy large-output stage through supply and demand matching logic under the condition of new energy access, smooth compensation is realized in a new energy shortage stage, the new energy consumption proportion is further improved, the stable characteristic of power supply is kept, the overall operation efficiency of the park is improved along with the diversified configuration of the energy forms, the optimization is formed on the resource utilization, the power transmission path is provided with a transmission mode independent of a public power grid, the source and the direction of electric energy can be ensured to be kept clear, the direct supply in the physical sense can be realized, the green power transmission quality is improved, the energy consumption of the park is not considered to be realized, and the green power transmission quality is not considered to be realized, but also makes the campus more competitive when facing the outside competition and green product market.

Next, the industrial park green electricity direct supply system in the present exemplary embodiment will be further described.

In an example embodiment of the present disclosure, referring to fig. 2, the green electricity generation module 110 may include a wind power generation unit 111, a photovoltaic power generation unit 112, a photo-thermal power generation unit 113, and a biomass power generation unit 114, wherein:

The wind power generation unit 111 may be used to convert received wind energy into green electric energy, and may utilize kinetic energy of air flow to push mechanical rotation through wind turbine blades, thereby converting mechanical energy into electric energy with high efficiency. For example, the wind power generation unit may be a horizontal axis or vertical axis wind turbine, and the wind turbine is composed of an impeller, a main shaft, a gear box (such as an eccentric gear box or a direct driving mode), a generator (optionally in a synchronous or asynchronous structure), and a power electronic conversion system (including a rectifier, an inverter and a controller). The wind power unit may also be equipped with meteorological sensors, such as anemometers and wind vanes, to enable feedback adjustment of the blade pitch control or variable speed control strategy to optimize the matching of rotational speed to output power.

The photovoltaic power generation unit 112 may be used to convert the received solar energy into green electrical energy, and may utilize the photovoltaic effect, i.e., when solar radiation is irradiated on the semiconductor material, photons excite to generate electron-hole pairs, and current is formed under the action of an electric field, thereby completing the direct conversion from light energy to electrical energy. The photovoltaic power generation unit mainly comprises a photovoltaic module, a converging device, a power conversion device and a monitoring and control unit. The photovoltaic module can adopt monocrystalline silicon or polycrystalline silicon solar panels, and can also use a thin film battery, a cadmium telluride battery or a perovskite battery to adapt to different application scenes. Each photovoltaic module is electrically connected through the direct current combiner box, direct current electric energy output by the modules is ensured to be input into the inverter after being concentrated, and the inverter converts the direct current electric energy into alternating current green electric energy for subsequent energy storage or direct load use.

In some alternative embodiments, the photovoltaic power generation unit 112 may cooperate with a maximum power point tracking (Maximum Power Point Tracking, MPPT) algorithm to automatically adjust the operating voltage under different illumination intensity, temperature conditions, to achieve maximum solar energy utilization. The inclination angle and the azimuth angle of the photovoltaic module can be designed according to the geographical position of a park and the distribution condition of solar radiation so as to obtain the optimal incident light intensity. The arrangement mode of the photovoltaic array can be a centralized ground power station mode or a distributed roof photovoltaic mode, and the park can also adopt building integrated designs such as a photovoltaic curtain wall and a photovoltaic parking shed to realize the efficient utilization of site resources. The power conversion device comprises a direct current-direct current converter besides an inverter, and is used for stabilizing the voltage before converging so as to ensure the efficiency and stability of the subsequent power conversion process. The monitoring and control unit can comprise an irradiance sensor, a temperature sensor and a current sensor, acquire environment and operation data in real time, and regulate and control the output of the photovoltaic power generation unit through the energy management system.

The photo-thermal power generation unit 113 can collect solar radiation through the heat collection device and heat working media, the heating working media can be water or molten salt, and therefore high-temperature and high-pressure steam is generated to drive the steam turbine to generate power. Compared with photovoltaic power generation, the photo-thermal power generation has natural long-term energy storage characteristic, and the heat storage device can continuously release heat at the condition of insufficient illumination or at night, so that the unit is driven to stably operate, and the photo-thermal power generation unit is similar to the conventional thermal power unit. Through this characteristic, the fluctuation of wind power generation and photovoltaic power generation power can effectively be balanced to the photo-thermal power generation, makes whole green electricity generation module's power supply more stable, matches industrial park load side's continuous operation demand. In addition, in the photo-thermal power generation process, part of low-temperature low-pressure steam after the steam turbine does work can be extracted and used for providing heat energy for heating or process links of a park, so that electric heating double-supply is realized, and the comprehensive utilization rate of energy sources is improved.

The biomass power generation unit 114 may generate heat energy and drive a turbine or gas turbine to generate power by burning, gasifying, or pyrolyzing biomass raw materials (e.g., straw, wood waste, or organic waste). The biomass power generation unit 114 is not only capable of providing stable green electricity to the industrial park, but also carbon dioxide generated during combustion or gasification is a renewable carbon source. The green carbon dioxide can be further synthesized into green methanol after being combined with green hydrogen, and is used for supplying basic chemical raw materials in the chemical links of industrial parks, so that an electricity-hydrogen-carbon recycling path is formed in each park. From this, biomass power generation unit still provides green carbon source when satisfying electric energy and heat energy demand, promotes the deep coupling of clean energy and green chemical industry in industrial park.

The wind power generation unit 111 and the photovoltaic power generation unit 112 are connected to the green energy storage module at the output end in an electrically parallel manner, and stable output power is realized based on wind-solar complementary characteristics. The output power of the wind power generation unit has the characteristics of small day and night difference and stronger output force when the wind speed is larger at night and in winter, and the output power of the photovoltaic power generation unit is mainly concentrated in the daytime, summer and sunny weather conditions and has obvious day and night periodicity and seasonal difference. After the two are connected in parallel to the green electricity energy storage module, the difference of wind energy and solar energy in time and space distribution can be utilized, so that a complementary effect is formed on output. The photovoltaic power generation unit provides main output when the illumination condition is good and the wind speed is low, the wind power generation unit supplements electric energy when the output of the photovoltaic power generation unit is insufficient due to night or overcast and rainy weather, and the green power energy storage module can absorb surplus electric energy for storage in a period of high wind and light output at the same time, so that the phenomenon of wind and light discarding is avoided.

By parallelly connecting the wind power generation unit and the photovoltaic power generation unit into the green electricity energy storage module, stable output power is realized based on wind-solar complementary characteristics, fluctuation caused by seasonal, day-night change or meteorological conditions of a single energy source can be effectively avoided, the continuity and stability of green electricity energy supply of an industrial park are improved, and accordingly dependence on electric energy of a power grid is reduced.

In an example embodiment of the present disclosure, with continued reference to fig. 2, the green electricity storage module 120 may include an electrochemical storage unit 121, a green hydrogen production unit 122, and a hydrogen storage unit 123, wherein:

The electrochemical energy storage unit 121 is configured to charge when the green electricity output of the green electricity generation module is higher than the real-time load demand of the industrial park, and discharge when the green electricity output is lower than the real-time load demand. The electrochemical energy storage unit can realize the bidirectional conversion of electric energy and chemical energy through reversible electrochemical reaction, when green electric energy is surplus, the electrode reaction is driven to enable ions to migrate in the electrolyte and complete the charging process, and when green electric energy is insufficient, the reverse electrochemical reaction releases the stored energy to form a current supply load. For example, the electrochemical energy storage unit can comprise a lithium ion battery, a sodium-sulfur battery or a flow battery, and the battery cells in the electrochemical energy storage unit can be controlled in groups through a battery management system and have the functions of overcharge protection, overdischarge protection and temperature management. In the charging and discharging process, the power conversion system exchanges the direct-current green electric energy with the alternating-current system in a high-efficiency manner through the bidirectional inverter, and the energy management system coordinates the charging and discharging strategy to prolong the service life of the battery and improve the energy storage efficiency. The electrochemical energy storage unit is introduced to realize peak clipping and valley filling when supply and demand of a park are in mismatch, so that the green electricity is supplied more stably, and the new energy consumption proportion is effectively improved.

The green hydrogen preparation unit 122 is configured to prepare green hydrogen and green oxygen from the surplus green electric energy when the green electric energy output of the green electric generation module is higher than the real-time load demand of the industrial park, collect and store the prepared green hydrogen and green oxygen, and use a part of green hydrogen as the input of the green electric generation module to synthesize green methanol. The green hydrogen preparation unit can realize water molecule decomposition at the anode and the cathode of the electrolytic tank by the reaction of electrolyzed water, namely, green electric energy is used as an external electric field driving force to generate green oxygen and green hydrogen. The working principle is that the anode reaction generates green oxygen and releases electrons, and the cathode reaction generates green hydrogen and consumes electrons, thereby completing the decomposition process of water. For example, the green hydrogen preparation unit can adopt an alkaline water electrolysis device or a proton exchange membrane water electrolysis (Proton Exchange Membrane Electrolysis, PEM) device, and the electrolytic tank consists of electrodes, electrolyte and a diaphragm, and is assisted by a gas separation and purification device to ensure the purity of green hydrogen and green oxygen. In some alternative embodiments, the green hydrogen production unit may also be configured with a gas compressor and storage tank to enable high pressure storage or cryogenic liquefaction of the product gas. Through the green hydrogen preparation unit, surplus green electricity can be converted into green hydrogen which can be stored for a long time and applied in multiple scenes, for example, green hydrogen and green carbon dioxide generated by a biomass power generation unit in a green electricity generation module can be combined to synthesize green methanol, carbon circulation is realized, and available green oxygen byproducts are generated at the same time, so that the overall utilization rate of green electricity in a park is effectively improved.

The hydrogen energy storage unit 123 is connected with the green hydrogen preparation unit 122, and is used for converting green hydrogen into electric energy when the industrial park has electricity shortage condition, and recovering heat energy in the conversion process for use in the park. The hydrogen energy storage unit can realize double supply of electric energy and heat energy through energy conversion of green hydrogen, for example, the energy conversion process of the hydrogen energy storage unit can comprise hydrogen fuel cell reaction or hydrogen internal combustion engine combustion process. In a hydrogen fuel cell, green hydrogen releases electrons at an anode and is separated from protons, the protons migrate to a cathode through an electrolyte membrane and react with green oxygen to generate water, and meanwhile, current output is formed in an external circuit. The hydrogen energy storage unit can comprise a proton exchange membrane fuel cell system (Proton Exchange Membrane Fuel Cell, PEMFC), the structure of the proton exchange membrane fuel cell system comprises a membrane electrode assembly, a bipolar plate and a gas supply system, high electric energy conversion efficiency can be achieved, and under the hydrogen internal combustion engine mode, a high-pressure injection hydrogen supply system and an efficient cooling system can be adopted to ensure stable combustion process and improve overall energy efficiency. In the working process of the hydrogen energy storage unit, the high-temperature heat energy discharged by the fuel cell or the internal combustion engine can be collected through the waste heat recovery device and is conveyed to the thermal load end of the park to replace a part of electric heating mode. Through the hydrogen energy storage unit, the park can acquire supplementary green electricity electric energy fast when the load breach, utilizes the waste heat to realize heat energy supply simultaneously to the flexibility and the comprehensive energy efficiency of whole system have been strengthened.

The green hydrogen preparation unit utilizes the surplus green electric energy to prepare green hydrogen and green oxygen, and collects and stores the green hydrogen and the green oxygen, so that the surplus green electric energy can be effectively absorbed, the phenomenon of wind discarding and light discarding is avoided, meanwhile, the generated green hydrogen can be synthesized with green carbon dioxide generated by a biomass power generation unit in the green power generation module to form green methanol, carbon circulation is realized, various energy classes are provided for industrial parks, the stored green hydrogen is converted into the green electric energy through the hydrogen energy storage unit, heat energy generated in the conversion process is recovered, extra electric energy compensation can be provided in the process of power shortage, meanwhile, the recycling of waste heat energy is realized, and the comprehensive efficiency of the energy utilization rate and the system is further improved.

Alternatively, green hydrogen production unit 122 may include at least one of an alkaline water electrolysis hydrogen plant and a proton exchange membrane water electrolysis hydrogen plant. The hydrogen production device by alkaline electrolysis of water can utilize an alkaline aqueous solution containing electrolyte such as potassium hydroxide or sodium hydroxide as a conductive medium, and realize the electrolysis of water molecules to generate green hydrogen and green oxygen by applying an external electric field to the two poles. When green electricity energy is input into the electrolytic tank, water molecules acquire electrons on the surface of the cathode to generate green hydrogen, and lose electrons on the surface of the anode to generate green oxygen, so that the conversion from electric energy to chemical energy is realized. The alkaline water electrolysis hydrogen production device can comprise an electrolytic tank main body, an anode, a cathode, an electrolyte circulation system and a gas-liquid separator, wherein the electrode is usually made of nickel-based alloy materials to improve catalytic activity and corrosion resistance, and the diaphragm is made of porous inorganic materials to reduce gas crossover. The alkaline electrolyzed water hydrogen production plant can also be equipped with a cooling system in operation to maintain a proper working temperature and purify the product green hydrogen and green oxygen by a gas purification unit. Through the alkaline water electrolysis hydrogen production device, the green electricity energy can realize the large-scale preparation of green hydrogen with lower cost, and is suitable for the continuous operation environment of an industrial park.

The proton exchange membrane water electrolysis hydrogen production device can utilize the proton exchange membrane as a solid electrolyte to realize the preparation of high-purity green hydrogen under high current density. When green electric energy is applied to the membrane electrode assembly, water molecules at the anode are catalytically decomposed into green oxygen, protons and electrons, and the protons migrate to the cathode through the proton exchange membrane under the action of an electric field and combine with the electrons to generate green hydrogen. The proton exchange membrane water electrolysis hydrogen production device can comprise a membrane electrode assembly, a bipolar plate, a gas diffusion layer and a sealing structure. Membrane electrode assemblies typically employ perfluorosulfonic acid membranes as proton conductors and are coated on both sides with platinum-based or iridium-based catalysts to facilitate the reaction. The bipolar plates are used to distribute gas and current and provide structural support. The gas diffusion layer ensures the uniform distribution of the reaction gas and improves the utilization rate of the electrode. The PEM electrolytic water hydrogen production device can operate under high current density, the purity of the product green hydrogen can reach more than 99.999%, the green hydrogen can be directly output under high pressure, and the subsequent compression energy consumption is reduced. Through proton exchange membrane electrolysis water hydrogen plant, green electricity can high-efficient conversion be high-purity green hydrogen, satisfies the demand of industrial park to the high-quality energy.

By adopting at least one of the alkaline water electrolysis hydrogen production device and the proton exchange membrane water electrolysis hydrogen production device, the hydrogen production process can be flexibly selected according to different application scenes, the hydrogen production efficiency and purity can be ensured, the adaptability and flexibility of green electricity energy consumption can be improved, and the expandability of an energy system of an industrial park can be enhanced.

In an alternative embodiment, the green hydrogen preparation unit 122 may purify and compress the green oxygen generated in the hydrogen production process, store the purified and compressed green oxygen, and send the purified green oxygen to the load energy module and the green electricity generation module through a pipeline or a skid-mounted vehicle, so as to serve as a supply source of oxygen load of an industrial park and a supply source of synthetic green methanol of the green electricity generation module. In the process of utilizing renewable energy sources to drive water electrolysis, the green hydrogen preparation unit can generate equivalent byproduct green oxygen besides green hydrogen, and the byproduct green oxygen usually contains water vapor, trace green hydrogen and other impurities in an untreated state, so that if the green hydrogen is directly discharged, not only is the resource wasted, but also potential safety hazards can exist. The byproduct green oxygen is stored after being purified and compressed, and is conveyed to the load energy module and the green electricity generation module in a pipeline or skid-mounted vehicle mode, so that the green oxygen is used as a supply source of an industrial park oxygen load and a supply source of green methanol synthesized by the green electricity generation module, the efficient utilization of the byproduct green oxygen and the carbon circulation of the system are realized, and the comprehensive optimization of the system with the park energy system is realized.

The purification of the green oxygen refers to the process of removing impurities and improving the concentration of the byproduct green oxygen generated in the green hydrogen preparation unit, and the purification of the green oxygen can remove unnecessary components such as water vapor, green hydrogen residues, nitrogen and the like by utilizing technical means such as condensation, adsorption, separation and the like. For example, the purification of the green oxygen can be realized by condensing water vapor in the green oxygen into liquid drops through a condensation separation device, discharging the liquid drops, selectively absorbing and removing nitrogen or argon through a molecular sieve absorption device, and realizing the high-efficiency separation of the green oxygen and the green hydrogen through a membrane separation device by utilizing the characteristic that a polymer membrane has higher permeability to the green hydrogen. After purification, the purity of the green oxygen can be improved to more than 95%, and the application requirements of links such as smelting, combustion supporting or sewage aeration in an industrial park are met.

The green oxygen compression refers to pressurizing purified green oxygen through a compressor so as to facilitate storage and subsequent transportation, for example, the compressor can adopt a piston compressor, a diaphragm compressor or a scroll compressor, different structures are adapted to different scales and purity requirements, the piston compressor is suitable for a large-scale continuous oxygen supply scene, the diaphragm compressor is suitable for the pressurizing requirement of high-purity green oxygen due to the fact that gas is not contacted with lubricating oil, the scroll compressor is suitable for small and medium-scale application with low noise and low vibration, and the compressed green oxygen pressure is usually between 0.2MPa and 2.0MPa so as to conveniently enter an air storage container or a transportation pipe network.

The green oxygen storage means that compressed green oxygen is stored in a fixed or movable storage tank so as to be regulated when load fluctuation or demand imbalance occurs, and for example, the gas storage device may comprise a high-pressure gas cylinder group, a spherical storage tank or a low-temperature liquid oxygen storage tank. The high-pressure gas cylinder group is suitable for short-term or scattered gas use scenes, the spherical storage tank is suitable for large-scale concentrated gas storage, and the liquid oxygen storage tank is used for realizing high-density storage by cooling green oxygen to low temperature for liquefaction, so that the volume can be greatly reduced and the storage period can be prolonged.

The green oxygen transportation can be carried through fixed pipeline transportation and sled dress car removal and carry two types, and wherein fixed pipeline transportation can be through pipeline network connection gas storage device and each gas terminal in garden, is fit for green oxygen load distribution and concentrates and the stable scene of quantity, and the pipeline adopts corrosion-resistant stainless steel material generally to be equipped with check valve, pressure regulating valve and flowmeter in the critical position, in order to ensure safe and accurate distribution. Skid-mounted car conveying mode can be through installing high-pressure steel bottle or liquid oxygen jar on moving platform, transport different gas utilization points in the garden through the vehicle, is fit for gas utilization demand dispersion or can't lay fixed pipeline's scene.

Through carrying out purification and compression to the green oxygen that green hydrogen preparation unit produced in the hydrogen production process and store to adopt pipeline or skid-mounted car mode to carry to the load and use the energy module, can turn into valuable green oxygen resource with the byproduct green oxygen, satisfy the inside production demand to green oxygen in industrial park, reduce outside green oxygen purchasing cost, realize the cyclic utilization of energy and material.

In an alternative embodiment, the hydrogen energy storage unit adopts a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device, and is used for collecting waste heat energy generated in the conversion process while converting green hydrogen into green electric energy and supplying the waste heat energy to the thermal load of a park when the waste heat energy utilization cost is lower than the electric heating cost of the load energy utilization module.

The hydrogen fuel cell can directly convert green hydrogen and green oxygen in air into electric energy through electrochemical reaction. The hydrogen fuel cell may include an anode, a cathode, and a proton exchange membrane, where green hydrogen is decomposed into protons and electrons, the protons migrate through the proton exchange membrane to the cathode, and the electrons form a current output via an external circuit, ultimately combining with green oxygen at the cathode to produce water. In this process, in addition to generating electrical energy, a great deal of low-temperature waste heat energy is released along with exothermic reaction, and the temperature is usually in the range of 60 ℃ to 90 ℃. In order to realize effective collection of waste heat, a water-cooling or air-cooling loop can be arranged outside the fuel cell stack body, wherein a water-cooling mode absorbs heat generated by cell reaction through a cooling water pipeline to form hot water, and an air-cooling mode utilizes a heat exchanger to lead out the heat and transfer the heat to air or secondary media. Different cooling modes can be flexibly selected according to the type and the scale of the heat load of the park, for example, water cooling is adopted in a scene needing central heating, the water cooling is connected to a regional heating network, and direct utilization is realized by combining air cooling with an air heater in a scene needing local air heating.

Hydrogen internal combustion engines may mix green hydrogen with air through a mechanical process and combust in cylinders, driving pistons in motion to produce mechanical work, which is converted to electrical energy via generators. Hydrogen internal combustion engines have the characteristics of no carbon emission and quick response in the combustion process, but the combustion temperature is high, usually between 180 ℃ and 400 ℃, and the exhaust gas contains a large amount of high-temperature waste heat. To achieve efficient use of this part of the waste heat energy, a waste heat recovery device, such as a flue gas heat exchanger, a water-cooled waste heat boiler or an Organic RANKINE CYCLE, ORC device, may be provided in the exhaust line of the hydrogen internal combustion engine to convert the high temperature waste heat energy into hot water, steam or low grade electrical energy. Specifically, the flue gas heat exchanger can directly recover waste gas heat for industrial hot water supply, the waste heat boiler can generate steam and access a park steam load system, and the ORC device can drive the turbine through working medium evaporation to realize secondary power generation, so that the whole energy efficiency is further improved while the heat load is met.

In some alternative embodiments, the hydrogen storage unit may also be configured with waste heat collection and distribution control functions for monitoring waste heat output power, temperature levels, and campus heat load demand. When the waste heat energy utilization cost is lower than the cost of the electric heating mode adopted by the load energy utilization module, the system is automatically switched to a waste heat supply mode, and the waste heat energy generated by the hydrogen fuel cell or the hydrogen internal combustion engine is preferentially utilized to meet the heat load requirement of the park, so that the electric heating consumption is reduced, and the overall energy consumption expenditure of the park is reduced. The cost comparison can be realized by introducing a thermoelectric equivalent model, and is specifically characterized in that the waste heat recovery cost is compared with the electric heating energy consumption cost in real time, and if the unit energy price of waste heat utilization is lower, the waste heat is led to a park heating system through valve control, heat exchanger switching and hot water pipeline adjustment.

The hydrogen energy storage unit adopts a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device, and the hydrogen energy storage unit collects and utilizes waste heat energy when converting green hydrogen into green electric energy, and supplies heat load to a park under the condition that the waste heat energy utilization cost is lower than the electric heating cost, so that the cooperative output of electric energy and heat energy can be realized, the comprehensive energy utilization efficiency of the system can be improved, and the park operation cost is reduced.

In an example embodiment of the present disclosure, with continued reference to fig. 2, the green electricity delivery module 130 may include a booster station unit 131, an electricity delivery unit 132, and an energy product delivery unit 133, wherein:

The booster station unit 131 may be configured to select a booster configuration of a corresponding voltage class according to the installed scales of the green electricity generation module and the green electricity energy storage module, and perform voltage class boosting on the green electricity energy to be delivered through the booster configuration. The booster station unit 131 may determine a corresponding voltage class configuration according to the installed scale of the green electricity generation module and the capacity scale of the green electricity storage module, for example, a 10 kv or 35 kv class booster configuration may be selected when the installed capacity is in the order of several megawatts, and a 110 kv or even 220 kv class booster configuration may be employed when the installed capacity is in the order of several tens megawatts to hundreds megawatts.

In some alternative embodiments, the booster station unit 131 may include a booster transformer for boosting the green electric power of a low voltage level to a predetermined transmission voltage level, a high voltage switching device for implementing an opening and closing operation and fault removal during transmission, and a protection and control system for monitoring a power transmission state and performing an automatic protection action in case of an abnormality. In the specific implementation process, the step-up transformer can be an oil-immersed type or a dry type transformer, the former is suitable for a large-capacity long-time continuous operation scene, and the latter is suitable for a place with higher environmental requirements or limited space. Through the configuration of booster station unit, can guarantee that green electric energy has suitable voltage class before the transmission when satisfying different scale parks demands to reduce the circuit loss and improve transmission efficiency.

The power sending unit 132 may be connected to the booster station unit, and configured to send the green electric energy with the boosted voltage level to the load energy module through a dedicated power transmission line independent of the power grid after receiving the output of the booster station unit, so as to ensure that the green electric energy is directly supplied by the industrial park. The special power transmission line is a power supply line specially designed for the park, so that scheduling and allocation conflict with a public power grid is avoided, and the priority of the park load energy utilization module to obtain direct-supply green electric energy is ensured.

In some alternative embodiments, power delivery unit 132 may include dedicated transmission lines, line protection devices, monitoring units, and power distribution terminals. The special transmission line can adopt overhead line or cable line, and overhead line is applicable to the condition that distance between garden and the power supply point is longer and the circuit environment allows, and cable line is applicable to city garden or underground piping lane condition. The line protection device is used for rapidly cutting off fault sections when overload, short circuit or ground faults occur so as to ensure the safety and stability of the conveying system. The monitoring unit can realize real-time monitoring on the state of the transmitted electric energy through a voltage sensor and a current sensor which are arranged on the electric power private line, and is linked with the energy management system of the park through the communication module. The distribution terminal can be arranged at the entrance of the load energy utilization module and used for distributing and scheduling the electric energy transmitted by the special electric power line according to the load characteristics. Through the configuration, the power sending unit can ensure that the park can still obtain stable and preferential green electric energy for direct supply when the public power grid is insufficient in power supply or large in fluctuation, and the cleanliness and the independence of energy utilization of the park are improved.

The energy product transporting unit 133 may be used to transport various energy sources or products such as cold energy, heat energy, hydrogen, oxygen, green methanol, etc., to the load energy module. Specifically, the energy product conveying unit 133 may include a pipeline conveying subunit and a skid-mounted vehicle conveying subunit, where the pipeline conveying subunit adopts a pipeline conveying mode and is suitable for centralized conveying of electric power, cold energy, heat energy, hydrogen, oxygen and green methanol in a park area, and the skid-mounted vehicle conveying subunit adopts a skid-mounted vehicle conveying mode and is suitable for flexible conveying of energy sources such as hydrogen, oxygen and green methanol or chemical products between different areas of the park or to external users. Through setting up energy product and carrying subunit, can beat the full link direct supply route of circular telegram, cold, heat, gas, liquid energy and raw materials, make the industry garden realize the cooperation distribution of electric energy and multiple energy products.

The booster station unit in the green electricity transmission module selects voltage grades according to installation scale and carries out voltage lifting, so that stability and efficiency of transmission of a transmission line can be guaranteed, the power transmission unit is independent of a special power transmission line outside a power grid to supply power to the load energy utilization module, the industrial park can be guaranteed to obtain green electricity energy which is preferentially and directly supplied, scheduling conflict with an external power grid is effectively avoided, autonomy and independence of energy utilization in the park are enhanced, meanwhile, the energy product transmission subunit is used for carrying out pipeline transmission or skid-mounted vehicle transmission on various energy sources or products such as cold energy, heat energy, hydrogen, oxygen and green methanol, the multi-energy cooperative distribution can be realized in the park, the distributed energy utilization point or external requirement can be flexibly met, and accordingly the overall energy utilization efficiency and comprehensive guarantee capability of the park are improved.

In an alternative embodiment, the access section of the power sending unit may be connected to the boost circuit outlet of the booster station unit, and the output section of the power sending unit is connected to the variable booster station of the load energy module, so that the voltage level of the green electric energy adjusted by the variable booster station meets the voltage level requirement of each electric device in the load energy module.

The power supply system comprises a power supply unit, a booster station unit, a power supply channel, a power supply system and a power supply system, wherein the power supply unit is connected with the booster station unit, and the booster station unit is connected with the power supply unit through a power supply channel. The access section can comprise equipment such as a high-voltage cable, a switch cabinet, an isolating switch and a circuit breaker, wherein the high-voltage cable is used for realizing physical conduction of long-distance transmission, the switch cabinet and the isolating switch are used for switching power flow directions and isolating fault lines under different operation working conditions, and the circuit breaker is used for automatically cutting off a circuit when a power system is abnormal or overloaded, so that fault expansion is avoided. In a specific implementation manner, the electrical equipment of the access section needs to meet the insulation level and the current carrying capacity of the output voltage level of the booster station unit, for example, when the output voltage of the booster station unit is in the 35 kv level, the access section should be equipped with a corresponding 35 kv high-voltage cable and a matched switching device so as to ensure the safety and reliability of the power transmission process. The access section can be further provided with a voltage transformer and a current transformer, and is used for collecting voltage and current parameters of green electric energy in real time and uploading the parameters to the energy management platform of the park through the monitoring system, so that real-time monitoring and remote control of an electric power sending link are realized.

The output section refers to an interface part in the power sending-out unit, which is used for leading out the transmitted high-voltage-class green electric energy and sending the green electric energy to an energy utilization link in a park, and the function of the output section is that the green electric energy is physically connected with voltage adaptation equipment in a load energy utilization module after long-distance or cross-region transmission. The output section can include a switch cabinet that is used for controlling branching and sending out of green electric energy, a line protection device, such as a microcomputer protection relay, for fast detecting and cutting off short circuit, overload and ground faults, a terminal cable and a line monitoring device, wherein the terminal cable is responsible for completing electrical butt joint with the internal transformer booster station of the park. In order to improve the stability of operation, the output section may also be configured with fault arc suppression devices and lightning arresters to protect the campus electrical facilities from external disturbances such as lightning strikes, operating overvoltages, etc.

The booster transformer has the function of performing secondary transformation on the received high-voltage-class green electric energy, so that the voltage class of the booster transformer meets the operation requirements of various electric equipment in the load energy utilization module. The variable booster station may include a main transformer for reducing high voltage power to medium or low voltage levels to match the voltage levels of different energy consuming units in a farm, a high and low voltage distribution device for distributing power among multiple loops to ensure that each consumer operates in an independent, stable loop, a reactive compensation device such as a capacitor bank or a Static Var Generator (SVG) for improving power factor and voltage stability, and a power quality adjustment device such as an active power filter for eliminating harmonics to ensure proper operation of sensitive load devices. In a specific application, if the load energy utilization module comprises a high-power motor driving device, the variable booster station needs to provide a power source of 10 kilovolts, and if the load energy utilization module comprises precise electronic equipment, the voltage level needs to be further reduced to 380 volts or 220 volts so as to meet the requirement of precise energy utilization. The alternative implementation mode comprises that an intelligent power transformation unit can be built in the variable booster station, and a digital protection and monitoring system is adopted to realize real-time monitoring and automatic adjustment of voltage, current and electric energy quality of a load side.

The access section through the electric power send-out unit is connected with the boost circuit exit linkage of the booster station unit to and the output section is connected with the change booster station of the energy module for load, make the green electric energy that passes through change booster station adjustment can match the voltage class demand of each consumer in the energy module for load, thereby guarantee the steady operation of different equipment, promote the security and the reliability of the whole power supply in garden.

In an example embodiment of the present disclosure, the load energy module may include an electrical load, a cold load, a heat load, a hydrogen load, an oxygen load, and an alcohol load, and the load energy module is configured to receive green electrical energy, green hydrogen, green oxygen, waste heat energy, and green methanol according to production operating conditions of an industrial park, forming a plurality of energy co-usage modes.

The electric load is the general name of various electric equipment in the industrial park, and the equipment can comprise a motor driving system, a control system, an electric heating device, a numerical control machine tool and the like. The electric load directly depends on green electric energy as running power, and mechanical driving, automatic control or electric heating conversion is realized through electric energy conversion. In specific implementation details, the electric load can be connected with the output section of the power sending unit through a transformer and a power distribution cabinet, receives the green electric energy regulated by the variable booster station, and distributes the green electric energy according to rated voltage and power requirements of different electric equipment.

The cold load refers to the requirement of the industrial park on cold energy in the links of refrigeration, air conditioning, low-temperature storage and the like. The cold load can drive the electric refrigerating device through green electric energy or can be supplied at a low temperature through residual cold resources after green hydrogen energy conversion. In specific implementation details, the cooling load can be realized by an electrically driven refrigeration compressor unit, or the cooling energy released in the liquid green hydrogenation process is recycled and conveyed to the area needing cooling through a cooling energy distribution network.

The heat load refers to the heat energy requirements of industrial park production processes and living facilities. The heat load can provide a stable heat source for the energy utilization end through the modes of waste heat energy, green hydrogen combustion heat energy or electric boiler heat supply and the like. In specific implementation details, the heat load may be realized by a steam boiler, a hot water boiler or a heat exchanger for waste heat recovery and heat energy supply. For example, a large amount of waste heat generated in the electrolysis process by the green hydrogen production unit may be captured by the circulation cooling system and transferred to the heat load unit via the heat exchange line for production heating or office heating. Of course, the heat load can also be directly converted into heat energy by using green electricity through an electric heating device, or heat is supplied through the waste heat recovery of a hydrogen fuel cell.

The hydrogen load refers to the utilization of green hydrogen energy by an industrial park in a production or traffic link. The hydrogen load can supply the green hydrogen output by the green hydrogen preparation unit as fuel or chemical raw material to a terminal for use after storage and pressure regulation. In particular, the hydrogen load may include hydrogen stations of a garden hydrogen fuel cell car, direct feeding of green hydrogen in chemical production, and a green hydrogen supply network used as a reducing agent in the metallurgical or electronic industry. Of course, green hydrogen can also be supplied directly with heat or electricity by a green hydrogen burner as part of a cogeneration system.

The oxygen load refers to the green oxygen demand of the industrial park in the industries of metallurgy, chemical industry, medicine, environmental protection and the like. The oxygen load can be supplied by purifying and compressing by-product green oxygen generated in the green hydrogen production unit process. Specifically, oxygen load can directly send to smelting furnace or chemical reaction device of high consumption oxygen through fixed pipeline, also can carry out portable transport through skid-mounted car for the green oxygen demand point of garden distributing type. Of course, the small oxygen storage tank can be used for guaranteeing the green oxygen of a medical institution in a park, or the green oxygen can be used for the aeration process of a sewage treatment link, so that the pollutant degradation efficiency can be enhanced.

The alcohol load refers to the requirement of the industrial park on green methanol in the links of chemical production, fuel substitution, basic raw material supply and the like. The alcohol load can be satisfied by green methanol obtained by reacting carbon dioxide generated by the biomass power generation unit in the combustion or gasification process with hydrogen generated by the green hydrogen preparation unit through a synthesis process. The green methanol can be used as a green source for synthesizing chemical products such as acetic acid, formaldehyde, olefin and the like at the downstream of a chemical industry park and is used for supplying basic chemical raw materials. Meanwhile, the green methanol can also be used as fuel for boiler combustion or internal combustion engine fuel directly to replace the traditional fossil fuel so as to reduce carbon emission. In the aspect of energy transportation in a park, the green methanol can be applied to a vehicle special for the park or a hybrid power system to form a green traffic energy system. On the aspect of conveying mode, green methanol can be conveyed in a centralized manner in a park range through a fixed pipeline network, and can be flexibly conveyed through skid-mounted vehicles, so that the requirements of distributed process links are met. By introducing alcohol load, the industrial park can realize the cyclic coupling of electricity, hydrogen and carbon on the energy and raw material level, and provide basic support for green production chains.

Through covering electric load, cold load, heat load, hydrogen load and oxygen load in the load energy module to can receive green electric energy, green hydrogen, green oxygen and waste heat energy, can realize the multi-energy collaborative supply and the comprehensive utilization of electric energy, cold energy, heat energy, hydrogen energy and green oxygen, form the coupling mode of multiple energy, effectively improve the comprehensive efficiency of energy utilization, reduce the whole energy consumption in garden and running cost, and provide clean, stable and diversified energy support for the industrial garden.

It should be noted that although several modules or units of the industrial park green electricity direct supply system are mentioned in the above detailed description, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

In addition, in an embodiment of the present disclosure, there is further provided an industrial park green electricity direct supply method, which may be performed by the industrial park green electricity direct supply system in the previous embodiment, with reference to fig. 3, and the method includes:

Step S310, converting wind energy and solar energy received by a green electricity generation module to generate green electricity energy, and determining a distribution path of the green electricity energy according to real-time load demands of the industrial park;

Step S320, when the output of the green electric energy is higher than the real-time load demand of the load energy utilization module, the surplus green electric energy is input to the green electric energy storage module for storage, and when the output of the green electric energy is lower than the real-time load demand, the stored green electric energy is released from the green electric energy storage module;

Step S330, the green electric energy directly supplied by the green electricity generation module and the green electric energy released by the green electricity energy storage module are received through the green electricity transmission module, the voltage level of the received green electric energy is increased, and the power is supplied to the load energy utilization module through a special power transmission line independent of a power grid;

And step S340, when the load energy utilization module receives the green electric energy transmitted by the green electric transmission module, the green electric energy is scheduled to corresponding electric load, heat load, cold load, hydrogen load, oxygen load and alcohol load according to production operation conditions of a park.

The specific details of each step in the above-mentioned green electricity direct supply method for the middle industrial park have been described in detail in the corresponding green electricity direct supply system for the industrial park, so that the details are not repeated here.

It should be noted that although the steps of the methods of the present disclosure are illustrated in a particular order in the figures, this does not require or imply that the steps must be performed in that particular order or that all of the illustrated steps must be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.

Furthermore, the above-described figures are only schematic illustrations of processes included in the method according to the exemplary embodiments of the present disclosure, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a touch terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A green electricity direct supply system for an industrial park, comprising: A green electricity generation module, configured to convert received wind energy and solar energy to output green electricity, wherein the green electricity is distributed according to the real-time load demand of the industrial park; a green electricity storage module connected to the green electricity generation module, configured to receive and store the green electricity when the green electricity output of the green electricity generation module exceeds the real-time load demand of the load energy consumption module, and to release the stored green electricity when the green electricity output of the green electricity generation module falls below the real-time load demand; A green electricity transmission module, connected to the green electricity generation module and the green electricity storage module, is used to receive the green electricity directly supplied by the green electricity generation module and the green electricity released by the green electricity storage module, increase the voltage level of the received green electricity, and supply power to the load energy module through a dedicated transmission line independent of the power grid; The load energy consumption module is connected to the green electricity transmission module, and is used to receive the green electricity transmitted by the green electricity transmission module and perform energy supply scheduling for different types of loads according to the production and operation conditions of the industrial park. 2. The system according to claim 1, wherein the green electricity generation module comprises: A wind power generation unit, used to convert the received wind energy into green electricity through the wind power generation components; Photovoltaic power generation unit, used to convert received solar energy into green electricity through photovoltaic modules; A solar thermal power generation unit, configured to convert received solar energy into green electricity by heating a working medium through a heat collecting assembly, and extracting steam from a portion of the generated electricity to supply the heat load of the industrial park; A biomass power generation unit is used to convert the heat energy generated by the combustion or gasification of biomass raw materials into green electricity, and to combine the green carbon dioxide produced as a by-product with green hydrogen to synthesize green methanol for use in the alcohol load of the industrial park; The wind power generation unit, the photovoltaic power generation unit, the solar thermal power generation unit and the biomass power generation unit are connected to the green electricity storage module in parallel to achieve stable output power based on complementary characteristics. 3. The system according to claim 1, wherein the green electricity storage module comprises: an electrochemical energy storage unit, configured to charge when the green electricity output of the green electricity generation module exceeds the real-time load demand of the industrial park, and discharge when the green electricity output is lower than the real-time load demand; a green hydrogen production unit configured to produce green hydrogen and green oxygen from surplus green electricity when the green electricity output of the green electricity generation module exceeds the real-time load demand of the industrial park, collect and store the produced green hydrogen and green oxygen, and use part of the green hydrogen as input to the green electricity generation module to synthesize green methanol; A hydrogen energy storage unit is connected to the green hydrogen production unit and is used to convert the green hydrogen into electrical energy when there is a power shortage in the industrial park, and to recover the heat energy generated during the conversion process for use in the park. 4. The system according to claim 3, characterized in that the green hydrogen production unit includes at least one of an alkaline water electrolysis hydrogen production device and a proton exchange membrane water electrolysis hydrogen production device. 5. The system according to claim 4 is characterized in that the green oxygen generated by the green hydrogen production unit during the hydrogen production process is purified and compressed before storage, and is transported to the load energy module and the green electricity generation module through pipelines or skid-mounted vehicles to serve as a supply source for the oxygen load of the industrial park and a supply source for the green methanol synthesized by the green electricity generation module. 6. The system according to claim 3 is characterized in that the hydrogen energy storage unit adopts a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device, which is used to collect waste heat energy generated during the conversion process while converting green hydrogen into green electricity, and supply the waste heat energy to the thermal load of the park when the cost of utilizing the waste heat energy is lower than the electric heating cost of the load energy module. 7. The system according to claim 1, wherein the green electricity transmission module comprises: A boost station unit, configured to select a boost configuration corresponding to a voltage level according to the installed capacity of the green electricity generation module and the green electricity storage module, and to increase the voltage level of the green electricity to be transmitted by using the boost configuration; The power sending unit is connected to the booster station unit and is used to transmit the green electricity with increased voltage level to the load energy module through a dedicated transmission line independent of the power grid after receiving the output of the booster station unit, so as to ensure that the industrial park is directly supplied with green electricity first. 8. The system according to claim 7 is characterized in that the access section of the power sending unit is connected to the boost line outlet of the boost station unit, and the output section of the power sending unit is connected to the transformer boost station of the load energy module, so that the voltage level of the green electricity adjusted by the transformer boost station meets the voltage level requirements of each electrical equipment in the load energy module. 9. The system according to claim 1 is characterized in that the load energy consumption module includes electric load, cooling load, heating load, hydrogen load, oxygen load and alcohol load, and the load energy consumption module is used to receive green electricity, green hydrogen, green oxygen, waste heat and green methanol according to the production and operation conditions of the industrial park, forming a multi-energy coordinated utilization mode. 10. A method for direct green electricity supply in an industrial park, characterized by being executed by the industrial park direct green electricity supply system according to any one of claims 1 to 9, the method comprising: Converting wind energy and solar energy received by the green electricity generation module to generate green electricity, and determining a distribution path for the green electricity based on the real-time load demand of the industrial park; When the output of the green electric energy is higher than the real-time load demand of the load energy module, the surplus green electric energy is input into the green electric energy storage module for storage; when the output of the green electric energy is lower than the real-time load demand, the stored green electric energy is released from the green electric energy storage module; The green electricity transmission module receives the green electricity directly supplied from the green electricity generation module and the green electricity released by the green electricity storage module, increases the voltage level of the received green electricity, and supplies power to the load energy module via a dedicated transmission line independent of the power grid; When the load energy module receives the green electricity transmitted by the green electricity transmission module, it dispatches the green electricity to the corresponding electric load, heat load, cooling load, hydrogen load, oxygen load and alcohol load according to the production and operation conditions of the park.