CN120824791A - State-of-charge-aware frequency-power coordinated control method for AC-coupled photovoltaic and energy storage systems - Google Patents
State-of-charge-aware frequency-power coordinated control method for AC-coupled photovoltaic and energy storage systemsInfo
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Abstract
本申请公开了一种光储交流耦合系统荷电状态感知型频率功率协同控制方法，涉及新能源发电与储能技术领域。包括：先实时获取储能系统的电池电荷状态值，并根据电池电荷状态值，确定储能变流器的参考频率；再基于参考频率和储能变流器的输出电压幅值信号，生成储能变流器的调制信号；然后同步检测储能变流器基于调制信号的交流母线电压频率；最终根据交流母线电压频率生成光伏系统的输出功率指令，并根据输出功率指令控制光伏系统。实现了光伏系统对储能系统电池电荷状态值的实时响应，避免了光伏系统因无法及时响应储能系统电池电荷状态而造成的系统频率越限或负载失电问题。
The present application discloses a charge state-aware frequency and power collaborative control method for a photovoltaic-storage AC coupling system, which relates to the field of renewable energy power generation and energy storage technology. The method comprises: first obtaining the battery charge state value of the energy storage system in real time, and determining the reference frequency of the energy storage converter based on the battery charge state value; then generating a modulation signal for the energy storage converter based on the reference frequency and the output voltage amplitude signal of the energy storage converter; then synchronously detecting the AC bus voltage frequency of the energy storage converter based on the modulation signal; finally generating an output power instruction for the photovoltaic system based on the AC bus voltage frequency, and controlling the photovoltaic system based on the output power instruction. This method realizes the real-time response of the photovoltaic system to the battery charge state value of the energy storage system, and avoids the problem of system frequency exceeding the limit or load power failure caused by the photovoltaic system's inability to respond to the battery charge state of the energy storage system in a timely manner.
Description
Technical Field
The invention relates to the technical field of new energy power generation and energy storage, in particular to a method, a device and equipment for cooperatively controlling charge state sensing type frequency power of an optical storage alternating current coupling system and a readable storage medium.
Background
Along with the continuous improvement of the permeability of renewable energy sources, the off-grid type light storage hybrid system is widely applied to the scenes of power supply in remote areas, island micro-grids and the like. Such systems typically consist of a photovoltaic power generation unit, an energy storage system, and a load, where the energy storage cells play a key role in balancing power generation and power demand. However, there are still several technical bottlenecks to be solved in practical application in the prior art, mainly including that the conventional static power limitation has a large defect and the photovoltaic power adjustment has hysteresis.
At present, a power distribution strategy based on a fixed threshold value is generally adopted in an off-grid optical storage system, when a battery is close to a full charge state, the battery charging capacity is rapidly reduced, the problems of overvoltage, lithium precipitation and the like are easily caused, and the service life of the battery is obviously shortened.
Therefore, there is a need for a state-of-charge aware frequency power cooperative control method for an optical storage ac coupling system that overcomes the above drawbacks.
Disclosure of Invention
The invention aims to provide a charge state sensing type frequency power cooperative control method, device, equipment and readable storage medium for an optical storage alternating current coupling system, which can simultaneously determine an output power instruction of a photovoltaic system by acquiring a battery charge state value of the energy storage system in real time, so that the output power instruction of the photovoltaic system is regulated in real time, the real-time response of the photovoltaic system to the battery charge state value of the energy storage system is realized, and the problem that the photovoltaic system cannot respond to the battery charge state of the energy storage system in time to cause out-of-limit system frequency or load power failure is avoided.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, the invention provides a state of charge sensing type frequency power cooperative control method of an optical storage alternating current coupling system, which comprises the following steps:
acquiring a battery charge state value of an energy storage system in real time, and determining a reference frequency of the energy storage converter according to the battery charge state value;
Generating a modulation signal of the energy storage converter based on the reference frequency and an output voltage amplitude signal of the energy storage converter;
synchronously detecting the voltage frequency of an alternating current bus of the energy storage converter based on the modulation signal;
and generating an output power instruction of the photovoltaic system according to the alternating current bus voltage frequency, and controlling the photovoltaic system according to the output power instruction.
In some embodiments, generating a modulation signal for the energy storage converter based on the reference frequency and the output voltage amplitude signal for the energy storage converter comprises:
Integrating the reference frequency to obtain an angle signal of the output voltage of the energy storage converter;
According to the angle signal and the output voltage amplitude signal, calculating the voltage instruction of the energy storage converter on the direct axis and the quadrature axis;
And generating a modulation signal of the energy storage converter according to the voltage instructions of the energy storage converter on the direct axis and the quadrature axis.
In some embodiments, generating a modulation signal of the energy storage converter according to a voltage command of the energy storage converter in a direct axis and an intersecting axis comprises:
based on the voltage instructions of the energy storage converter on the direct axis and the quadrature axis, a current instruction signal of a current inner loop is obtained through a PI controller of the voltage loop;
Based on the current command signal, the modulating signal of the energy storage converter is obtained through the PI controller of the current loop.
In some embodiments, synchronously detecting an ac bus voltage frequency of the energy storage converter based on the modulated signal includes:
driving the switching on and off of a three-phase bridge arm switching tube based on a modulation signal of the energy storage converter;
And synchronously detecting the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal through a phase-locked loop.
In some embodiments, generating an output power command for a photovoltaic system from an ac busbar voltage frequency includes:
generating photovoltaic output limiting power of a photovoltaic system according to the alternating current bus voltage frequency;
and generating an output power instruction of the photovoltaic system based on the photovoltaic output limited power and the photovoltaic output maximum power.
In some embodiments, the method further comprises:
determining battery charging power of the energy storage system according to the battery charge state value;
And controlling the charging of the energy storage system based on the battery charging power.
In a second aspect, the present invention further provides a state of charge sensing type frequency power cooperative control device for an optical storage ac coupling system, where the device includes:
The frequency determining module is used for acquiring a battery charge state value of the energy storage system in real time and determining a reference frequency of the energy storage converter according to the battery charge state value;
The signal generation module is used for generating a modulation signal of the energy storage converter based on the reference frequency and an output voltage amplitude signal of the energy storage converter;
the frequency detection module is used for synchronously detecting the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal;
And the system control module is used for generating an output power instruction of the photovoltaic system according to the alternating current bus voltage frequency and controlling the photovoltaic system according to the output power instruction.
In a third aspect, the present invention further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the state-of-charge aware frequency power cooperative control method of the optical storage ac coupling system provided in the first aspect when executing the computer program.
In a fourth aspect, the present invention further provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements the state-of-charge aware frequency power cooperative control method of the optical storage ac coupling system provided in the first aspect.
In a fifth aspect, the present invention further provides a computer program product, which comprises a computer program, and the computer program when executed by a processor realizes the method for collaborative control of state-of-charge sensing type frequency power of an optical storage ac coupling system provided in the first aspect.
The method has the beneficial effects that the method for controlling the state-of-charge sensing type frequency power cooperation of the light-storage alternating-current coupling system has the advantages that the state-of-charge value of the battery of the energy storage system is obtained in real time, the reference frequency of the energy storage converter is determined according to the state-of-charge value of the battery, the modulating signal of the energy storage converter is generated based on the reference frequency and the output voltage amplitude signal of the energy storage converter, the alternating-current bus voltage frequency of the energy storage converter based on the modulating signal is synchronously detected, the output power instruction of the photovoltaic system is finally generated according to the alternating-current bus voltage frequency, and the photovoltaic system is controlled according to the output power instruction. The output power instruction of the photovoltaic system can be simultaneously determined by acquiring the battery charge state value of the energy storage system in real time, so that the output power instruction of the photovoltaic system is adjusted in real time, the real-time response of the photovoltaic system to the battery charge state value of the energy storage system is realized, and the problems of system frequency out-of-limit or load power loss caused by the fact that the photovoltaic system cannot respond to the battery charge state of the energy storage system in time are avoided.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic flow chart of a method for controlling the state of charge sensing type frequency power cooperation of an optical storage ac coupling system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an off-grid optical storage AC coupling system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an off-grid load circuit and a control structure thereof of an energy storage converter according to an embodiment of the present invention;
FIG. 4 is a graph illustrating a constraint relationship between battery charge power and battery state of charge of an energy storage system according to an embodiment of the present invention;
FIG. 5 is a diagram of power control time domain information of an off-grid optical storage AC coupling system based on a battery state of charge value according to an embodiment of the present invention;
fig. 6 is a voltage and current change process diagram of the output side of the energy storage converter when the off-grid optical storage ac coupling system according to an embodiment of the present invention changes based on a battery state of charge value;
FIG. 7 is a schematic flow chart of another method for controlling the state of charge sensing type frequency power cooperation of an optical storage AC coupling system according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a structure of a state-of-charge sensing type frequency power cooperative control device of an optical storage ac coupling system according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating a structure of another charge state sensing type frequency power cooperative control device of an optical storage ac coupling system according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the application.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that references in the specification to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Furthermore, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In some embodiments, a method for collaborative control of state of charge sensing type frequency power of an optical storage ac coupling system is provided, and the method specifically includes:
s101, acquiring a battery charge state value of an energy storage system in real time, and determining a reference frequency of the energy storage converter according to the battery charge state value.
Fig. 2 is a schematic diagram of an off-grid optical storage ac coupling system with load, in which both the photovoltaic system and the energy storage system contain LCL filters,Is the line reactance value between the photovoltaic system and the ac bus,Is the line reactance value between the energy storage system and the ac bus.
Fig. 3 is a schematic diagram of an off-grid load circuit of an energy storage converter and a control structure thereof, in the main circuit of fig. 2, lif is a machine side inductance, cf is a filter capacitor on an alternating current side, rf is a damping resistor connected in series on the filter capacitor on the alternating current side, lgf is a grid side filter inductance of the energy storage converter, xg is a line reactance value, dc bus voltage of the Vdc energy storage converter, V machine side voltage vector, if machine side current vector, ig grid side current vector, uf capacitor voltage vector, ug is a load voltage vector, PCC points refer to grid connection points, eg is an ac bus voltage vector.
In the control structure shown in fig. 3, the control of the energy storage converter mainly includes three parts, namely a power loop, a voltage inner loop and a current inner loop. Wherein the power loop part generates corresponding angular frequency signals mainly through an active power loop and a reactive power loopAnd a voltage amplitude signalThe method comprises the following steps:
;
Wherein, the AndThe inertia coefficient and the damping coefficient of the active ring respectively,AndThe inertia coefficient and the damping coefficient of the reactive ring respectively,AndThe active power reference value and the reactive power reference value,AndAngular frequency reference and voltage amplitude reference respectively,AndThe active power actual value and the reactive power actual value output by the energy storage converter are respectively, the calculation formula is as follows:
;
Specifically, the battery charge state value of the energy storage system can be collected in real time, and different battery charge state values correspond to different reference frequencies, and the corresponding relation refers to the following formula:
;
Wherein, the As a reference to the frequency of the reference,As the value of the state of charge of the battery,Representing the state of charge of the battery corresponding to the seamless power point, i.e. when the state of charge value of the battery exceedsThe energy storage battery starts a limited power charging mode,Indicating a critical state of charge value of the battery to stop charging, i.e. when the state of charge value of the battery reachesWhen the energy storage battery is in a state of being forbidden to charge,A critical battery state of charge value representing the onset of frequency hopping,Is the rated frequency of the energy storage converter, namely the working frequency of the energy storage converter in the normal mode,Is the operating frequency of the energy storage converter in the hysteresis mode, which is consistent with the frequency of the last update period,When the energy storage converter is started in the hysteresis mode, that is, the state of charge value of the battery reachesOperating frequency at that time, whileIs the operating frequency in the over-frequency mode,Then the energy storage converter operates in the ascending frequency slope of the linear ascending frequency mode, and the expression of the ascending frequency slope is:
;
The frequency values in different operation modes include rated frequency Hysteresis mode on-frequency valueHysteresis mode run valueOverfrequency modeUp-conversion slope in up-conversion modeCorresponding critical battery state of charge,AndThe customized adaptation can be performed according to the battery performance and the actual off-grid system requirement.
S102, generating a modulation signal of the energy storage converter based on the reference frequency and the output voltage amplitude signal of the energy storage converter.
Specifically, the reference frequency can be integrated first to obtain an angle signal of the output voltage of the energy storage converter, specifically:
;
Wherein, the For the angle signal of the output voltage of the energy storage converter,Is the reference frequency.
And then according to the angle signal and the output voltage amplitude signal, calculating the voltage command of the energy storage converter on the straight axis and the quadrature axis, specifically:
;
Wherein, the AndThe voltage commands of the direct axis (d-axis) and the quadrature axis (q-axis), respectively.
And generating a modulation signal of the energy storage converter according to the voltage instructions of the energy storage converter on the direct axis and the quadrature axis. Specifically, a current instruction signal of a current inner loop is obtained through a PI controller of a voltage loop based on voltage instructions of an energy storage converter in a direct axis and an intersecting axis:
;
Wherein, the AndThe current command signals of the d axis and the q axis are respectively,AndThe proportional and integral coefficients of the voltage controller respectively,AndThe d-axis and q-axis components of the actual ac output voltage respectively,Is the output ac capacitance value.
And based on the current instruction signal, obtaining a modulation signal of the energy storage converter through a PI controller of the current loop:
;
Wherein, the AndThe machine side voltage modulation signals of the d axis and the q axis respectively,AndThe proportional and integral coefficients of the current controller respectively,AndThe d-axis and q-axis components of the actual ac output current respectively,Output the filtered inductance value, and then generate the machine side voltage modulation signals of d axis and q axisAndObtaining modulation signals converted into abc three-phase coordinate system,AndAnd generating PWM (pulse width modulation) signals which are modulation signals of the energy storage converter through a pulse width modulation module, so as to drive the switching tube of the three-phase bridge arm to be switched on and off.
S103, the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal is synchronously detected.
The switching-on and switching-off of the three-phase bridge arm switching tube can be driven based on the modulation signal of the energy storage converter, and the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal is synchronously detected through the phase-locked loop.
And S104, generating an output power instruction of the photovoltaic system according to the alternating current bus voltage frequency, and controlling the photovoltaic system according to the output power instruction.
Specifically, photovoltaic output limiting power of a photovoltaic system is generated according to the voltage frequency of an alternating current bus:
;
Wherein, the The power is limited for the photovoltaic output,Is the rated frequency of the energy storage converter, namely the working frequency of the energy storage converter in the normal mode,When the energy storage converter is started in the hysteresis mode, that is, the state of charge value of the battery reachesOperating frequency at that time, whileIs the operating frequency in the over-frequency mode,The boost slope of the energy storage converter operating in the linear boost mode.
And generating an output power instruction of the photovoltaic system based on the photovoltaic output limited power and the photovoltaic output maximum power:
;
Wherein, the For the maximum power output by the photovoltaic,Is an output power instruction of the photovoltaic system.
According to the charge state sensing type frequency power cooperative control method of the light storage alternating current coupling system, a battery charge state value of an energy storage system is obtained in real time, a reference frequency of an energy storage converter is determined according to the battery charge state value, a modulating signal of the energy storage converter is generated based on the reference frequency and an output voltage amplitude signal of the energy storage converter, an alternating current bus voltage frequency of the energy storage converter based on the modulating signal is synchronously detected, an output power instruction of the photovoltaic system is finally generated according to the alternating current bus voltage frequency, and the photovoltaic system is controlled according to the output power instruction. The output power instruction of the photovoltaic system can be simultaneously determined by acquiring the battery charge state value of the energy storage system in real time, so that the output power instruction of the photovoltaic system is adjusted in real time, the real-time response of the photovoltaic system to the battery charge state value of the energy storage system is realized, and the problems of system frequency out-of-limit or load power loss caused by the fact that the photovoltaic system cannot respond to the battery charge state of the energy storage system in time are avoided.
In another embodiment, the battery charging power of the energy storage system is further required to be limited according to the battery charge state value of the energy storage system, that is, the battery charging power of the energy storage system is determined according to the battery charge state value, as shown in fig. 4, fig. 4 is a constraint relation graph of the battery charging power and the battery charge state value of the energy storage system, where a functional expression corresponding to the constraint relation graph is;
;
Wherein, the The battery of the energy storage system is charged with power,Indicating the rated charge power of the energy storage system,Representing the state of charge value of the battery corresponding to the seamless power point, i.e. when the state of charge value of the battery exceedsThe energy storage battery starts a limited power charging mode,Indicating a critical state of charge value for stopping charging, i.e. when the state of charge value of the battery reachesAnd when the energy storage battery is in a state of being forbidden to charge. And further controlling the charging of the energy storage system based on the battery charging power.
According to the method, the charging power of the energy storage system can be controlled according to the state of charge value of the battery, and further damage to the energy storage system caused by too fast charging of the energy storage system is prevented.
In another embodiment, to verify the effectiveness of the above method, the verification may be performed by setting parameters such as the DC bus voltage of the energy storage system750V, effective value of AC voltage230V DC bus capacitor2800 Mu F machine side inductance140 Mu H, AC filter capacitor32 Mu F, net side inductance5 MuH, two state of charge thresholds of the energy storage battery90 Percent,98% Of the frequency value of the energy storage converter in different modesAt a frequency of 50Hz,At a frequency of 50.3Hz,Maximum output power of the photovoltaic system at 51Hz60KW.
Specifically, fig. 5 is a power regulation time domain information diagram of the off-grid optical storage ac coupling system based on a battery state of charge value. Based on the optical storage system architecture diagram of fig. 2, a battery was simulatedFrom 85% to 98% and then back to 85%.
Fig. 6 is a graph of the voltage and current change process of the output side of the energy storage converter when the off-grid optical storage ac coupling system changes based on the state of charge value of the battery.
As can be seen from fig. 5 and fig. 4, when the state of charge value of the battery increases from 85% to 90%, the energy storage system enters the hysteresis mode from the normal mode, the system frequency increases from 50Hz to 50.3Hz, and as the state of charge value of the battery continues to increase, the system enters the linear frequency increasing mode, the system frequency gradually increases, and the output power of the photovoltaic system also gradually decreases from 1p. When the battery is storedIncreasing to 98%, the system enters an over-frequency mode, the system frequency increases to 51Hz, and the output power of the photovoltaic gradually decreases to 0. And then, as the state of charge value of the battery is reduced, the system enters a linear frequency-increasing mode, a hysteresis mode and a normal mode again, and the photovoltaic power is gradually increased, so that the effectiveness of the state of charge sensing type frequency power cooperative control method of the optical storage alternating current coupling system is verified.
In order to more fully demonstrate the scheme, this embodiment provides an alternative way of a state of charge sensing type frequency power cooperative control method of an optical storage ac coupling system, as shown in fig. 7:
s201, acquiring a battery charge state value of an energy storage system in real time, and determining a reference frequency of the energy storage converter according to the battery charge state value.
S202, integrating the reference frequency to obtain an angle signal of the output voltage of the energy storage converter.
S203, calculating voltage instructions of the energy storage converter on a direct axis and an intersecting axis according to the angle signals and the output voltage amplitude signals.
S204, obtaining a current instruction signal of the current inner loop through a PI controller of the voltage loop based on the voltage instructions of the energy storage converter on the direct axis and the quadrature axis.
S205, based on the current instruction signal, a modulation signal of the energy storage converter is obtained through a PI controller of the current loop.
S206, switching on and switching off of the three-phase bridge arm switching tube is driven based on the modulation signal of the energy storage converter.
S207, the AC bus voltage frequency of the energy storage converter based on the modulation signal is synchronously detected through the phase-locked loop.
And S208, generating photovoltaic output limiting power of the photovoltaic system according to the alternating-current bus voltage frequency.
S209, generating an output power instruction of the photovoltaic system based on the photovoltaic output limited power and the photovoltaic output maximum power.
S210, controlling the photovoltaic system according to the output power instruction.
S211, determining the battery charging power of the energy storage system according to the battery charge state value.
S212, controlling the energy storage system to charge based on the battery charging power.
The specific process of S201 to S212 may refer to the description of the foregoing method embodiment, and its implementation principle and technical effects are similar, and are not repeated herein.
Based on the same inventive concept, the embodiment of the application also provides a device for realizing the state-of-charge sensing type frequency power cooperative control method of the optical storage alternating current coupling system. The implementation scheme of the device for solving the problem is similar to that described in the above method, so the specific limitation in the embodiments of the device for controlling the state-of-charge sensing type frequency power cooperative of the optical storage ac coupling system provided below can be referred to the limitation of the method for controlling the state-of-charge sensing type frequency power cooperative of the optical storage ac coupling system described above, and will not be repeated here.
In one embodiment, as shown in fig. 8, there is provided a state of charge aware frequency power cooperative control device of an optical storage ac coupling system, the device comprising:
The frequency determining module 30 is configured to obtain a battery state of charge value of the energy storage system in real time, and determine a reference frequency of the energy storage converter according to the battery state of charge value;
the signal generating module 31 is configured to generate a modulation signal of the energy storage converter based on the reference frequency and an output voltage amplitude signal of the energy storage converter;
The frequency detection module 32 is used for synchronously detecting the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal;
The system control module 33 is configured to generate an output power command of the photovoltaic system according to the ac bus voltage frequency, and control the photovoltaic system according to the output power command.
In another embodiment, as shown in fig. 9, the signal generating module 31 in fig. 8 includes:
the angle determining unit 310 is configured to integrate the reference frequency to obtain an angle signal of the output voltage of the energy storage converter;
the instruction calculating unit 311 is configured to calculate voltage instructions of the energy storage converter on the direct axis and the quadrature axis according to the angle signal and the output voltage amplitude signal;
the signal generating unit 312 is configured to generate a modulation signal of the energy storage converter according to the voltage command of the energy storage converter in the direct axis and the quadrature axis.
In another embodiment, the signal generating unit 312 in fig. 9 is specifically configured to obtain a current command signal of the current inner loop through the PI controller of the voltage loop based on the voltage command of the energy storage converter in the direct axis and the quadrature axis, and obtain a modulation signal of the energy storage converter through the PI controller of the current loop based on the current command signal.
In another embodiment, the frequency detection module 32 in fig. 8 is specifically configured to drive the switching tubes of the three-phase bridge arm to be turned on and off based on the modulation signal of the energy storage converter, and synchronously detect the voltage frequency of the ac bus of the energy storage converter based on the modulation signal through the phase-locked loop.
In another embodiment, the system control module 33 in fig. 8 is specifically configured to generate the photovoltaic output limit power of the photovoltaic system according to the ac bus voltage frequency, and generate the output power command of the photovoltaic system based on the photovoltaic output limit power and the photovoltaic output maximum power.
In another embodiment, the state-of-charge sensing type frequency power cooperative control device of the optical storage ac coupling system in fig. 8 is further configured to determine a battery charging power of the energy storage system according to the battery state-of-charge value, and control charging of the energy storage system based on the battery charging power.
The present embodiment also provides an electronic device, and in some implementations, referring to fig. 10, an electronic device 700 includes an input unit 710, a memory 720, a processor 730, and an output unit 740. The memory 720 stores program instructions executable on the processor 730, and the processor 730 invokes the program instructions to perform the state-of-charge aware frequency power cooperative control method and/or technique based on the optical storage ac coupling system in the foregoing embodiments. The electronic device 700 may be a mobile terminal device such as a mobile phone or a computer.
In addition, the embodiment of the application also provides a computer readable storage medium for storing a computer program for executing the state-of-charge sensing type frequency power cooperative control method of the optical storage alternating current coupling system. Such as computer program instructions, which, when executed by a computer, may invoke or provide the method and/or technique according to the application by way of operation of the computer. Program instructions for invoking the inventive methods may be stored in fixed or removable storage media and/or transmitted via a data stream in a broadcast or other signal bearing medium and/or stored within a storage medium operating according to the program instructions.
It will be apparent to those skilled in the art that the modules or steps of the application described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a memory device for execution by the computing devices, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.
The technical features of the above embodiments may be arbitrarily integrated, and for brevity, all of the possible integration of the technical features of the above embodiments may not be described, however, as long as the integration of the technical features is not inconsistent, it should be considered as the scope of the disclosure.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The method for cooperatively controlling the state of charge sensing type frequency power of the optical storage alternating current coupling system is characterized by comprising the following steps of:
acquiring a battery charge state value of an energy storage system in real time, and determining a reference frequency of an energy storage converter according to the battery charge state value;
generating a modulation signal of the energy storage converter based on the reference frequency and an output voltage amplitude signal of the energy storage converter;
synchronously detecting the voltage frequency of an alternating current bus of the energy storage converter based on the modulation signal;
and generating an output power instruction of the photovoltaic system according to the alternating current bus voltage frequency, and controlling the photovoltaic system according to the output power instruction.
2. The method of collaborative control of state-of-charge aware frequency power of an optical storage ac coupling system according to claim 1, wherein generating a modulation signal for an energy storage converter based on the reference frequency and an output voltage amplitude signal for the energy storage converter comprises:
integrating the reference frequency to obtain an angle signal of the output voltage of the energy storage converter;
Calculating voltage instructions of the energy storage converter on a direct axis and an intersecting axis according to the angle signal and the output voltage amplitude signal;
and generating a modulation signal of the energy storage converter according to the voltage instructions of the energy storage converter on the direct axis and the quadrature axis.
3. The method for collaborative control of state of charge aware frequency power of an optical storage ac coupling system according to claim 2, wherein generating a modulation signal of an energy storage converter based on voltage commands of the energy storage converter in a direct axis and an quadrature axis comprises:
based on the voltage instructions of the energy storage converter on the direct axis and the quadrature axis, a current instruction signal of a current inner loop is obtained through a PI controller of a voltage loop;
And obtaining a modulation signal of the energy storage converter through a PI controller of a current loop based on the current instruction signal.
4. The method for collaborative control of state-of-charge aware frequency power of an optical storage ac coupling system according to claim 1, wherein synchronously detecting an ac bus voltage frequency of the energy storage converter based on the modulated signal comprises:
Driving the switching on and off of a three-phase bridge arm switching tube based on the modulation signal of the energy storage converter;
And synchronously detecting the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal through a phase-locked loop.
5. The method for collaborative control of state of charge aware frequency power of an optical storage ac coupling system according to claim 1, wherein generating an output power command of a photovoltaic system based on the ac bus voltage frequency comprises:
Generating photovoltaic output limiting power of the photovoltaic system according to the alternating current bus voltage frequency;
and generating an output power instruction of the photovoltaic system based on the photovoltaic output limited power and the photovoltaic output maximum power.
6. The method for collaborative control of state of charge aware frequency power for an optical storage ac coupling system of claim 1 further comprising:
determining battery charging power of the energy storage system according to the battery charge state value;
And controlling the energy storage system to charge based on the battery charging power.
7. A state of charge aware frequency power cooperative control device for an optical storage ac coupling system, the device comprising:
the frequency determining module is used for acquiring a battery charge state value of the energy storage system in real time and determining the reference frequency of the energy storage converter according to the battery charge state value;
The signal generation module is used for generating a modulation signal of the energy storage converter based on the reference frequency and an output voltage amplitude signal of the energy storage converter;
The frequency detection module is used for synchronously detecting the voltage frequency of the alternating current bus of the energy storage converter based on the modulation signal;
and the system control module is used for generating an output power instruction of the photovoltaic system according to the alternating current bus voltage frequency and controlling the photovoltaic system according to the output power instruction.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and running on the processor, characterized in that the processor implements the state-of-charge aware frequency power cooperative control method of an optically stored ac-coupled system according to any one of claims 1 to 6 when executing the computer program.
9. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the method for cooperatively controlling the state of charge sensing type frequency power of the optical storage ac coupling system according to any one of claims 1 to 6 is implemented.
10. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the state of charge aware frequency power cooperative control method of an optical storage ac coupling system according to any one of claims 1 to 6.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180248374A1 (en) * | 2015-09-08 | 2018-08-30 | Korea Electric Power Corporation | Stand-alone micro-grid autonomous control system and method |
| CN117254517A (en) * | 2023-09-12 | 2023-12-19 | 中国电建集团华东勘测设计研究院有限公司 | Optical storage decentralized collaborative control method for AC microgrid |
| CN118281931A (en) * | 2024-04-16 | 2024-07-02 | 国网综合能源服务集团有限公司 | A coordinated control method for energy storage converter in off-grid operation mode |
-
2025
- 2025-09-19 CN CN202511340880.1A patent/CN120824791A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180248374A1 (en) * | 2015-09-08 | 2018-08-30 | Korea Electric Power Corporation | Stand-alone micro-grid autonomous control system and method |
| CN117254517A (en) * | 2023-09-12 | 2023-12-19 | 中国电建集团华东勘测设计研究院有限公司 | Optical storage decentralized collaborative control method for AC microgrid |
| CN118281931A (en) * | 2024-04-16 | 2024-07-02 | 国网综合能源服务集团有限公司 | A coordinated control method for energy storage converter in off-grid operation mode |
Non-Patent Citations (1)
| Title |
|---|
| 汪亮灯: ""光储交流微电网孤岛模式下的改进型主从控制"", 《高电压技术》, vol. 46, no. 10, 31 October 2020 (2020-10-31) * |
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