WO2018048115A1 - Construction method and operating method for pumped-storage hydroelectricity generation system using seawater - Google Patents

Abstract

The present invention relates to a construction method and an operating method for a pumped-storage hydroelectricity generation system using seawater. The objective of the present invention is to: construct an upper artificial reservoir (10a) and a lower artificial reservoir (10b), which draw in surrounding seawater and store the same, at different heights and with a storage capacity which are required for hydroelectricity generation; construct a combined water filling and draining line (20), which includes a draining pipe (22) at one end thereof, so as to enable both the supply of seawater and the discharge of seawater concentrate to/from the upper artificial reservoir (10a) and the lower artificial reservoir (10b); construct the combined water filling and draining line (20) by connecting the same to the coast through a seawater supply pipe (21), thereby enabling seawater of the coast to be supplied therethrough; construct a ballast water treatment system (30) at the side of a water intake port (21a) of the seawater supply pipe (21); construct a pumped-storage hydroelectricity generator (40) so as to generate hydroelectricity with the water falling from the upper artificial reservoir (10a) during a peak load, and to supply the seawater of the lower artificial reservoir (10b) to the upper artificial reservoir (10a) if there is surplus hydroelectricity; construct a power transmission/power reception substation (50) so as to receive and boost the generated hydroelectricity of the pumped-storage hydroelectricity generator (40), and then transmit the same to a power grid (70), and to drive, in a pumped storage mode, a turbine (41) and a motor (42) when the power of the power grid (70) is supplied to the pumped-storage hydroelectricity generator (40) if there is surplus hydroelectricity; and firstly complete the construction of the combined water filling and draining line (20), the seawater supply pipe (21), and the ballast water treatment system (30) six to twelve months before a pumped-storage hydroelectricity generation station is completed, so as to have an initial water-filling period of filling any one of the upper artificial reservoir (10a) and the lower artificial reservoir (10b) to a full level so as to meet the storage capacity or filling both the reservoirs with the seawater at half of the storage capacity for six to twelve months until the pumped-storage hydroelectricity generation station is completed. Therefore, facility costs of the water filling and draining line and maintenance costs according to the operation thereof can be reduced, and since the water filling period in which seawater is filled up before the completion of the pumped-storage hydroelectricity generation station is sufficient, a pumped-storage hydroelectricity generation mode in a water leakage test and a trial run can be easily performed so as to be suitable to the local situation, thereby enabling a trial run period to be maximally shortened.

Description

Construction Method and Operation Method of Pumped Power Generation System Using Seawater

The present invention relates to a construction method and a driving method of the pumping power generation system using sea water, in particular, using the seawater brought from the coast to the artificial reservoir after making two artificial reservoirs with a difference in height even in the dry inland region When power is left, the seawater of the lower artificial reservoir is pumped up to fill the upper artificial reservoir, and when the power is needed, the construction method and operation method of the pumping power generation system using the seawater generated by dropping the upper artificial reservoir seawater to the lower artificial reservoir below. It is about.

In general, pumped-storage hydroelectricity (PSH) is a means of mass storage of power energy, and is used as a method of satisfying power loads for load balancing in a large power supply network. It has been operating in conjunction.

The positive power generation method mainly uses the difference between the power supply and demand between day and night. In other words, during low-night nights, water at low altitudes is pumped to reservoirs at high altitudes and stored in the form of potential energy, while the stored water is discharged through generators during times of high electricity demand during the day. .

The pumped power generation began in Italy and Switzerland in the 1890s, and began to be utilized in the United States in 1930. A total of seven pumped power plants, including the Cheongpyeong pumped-up power plant constructed in 1979, are currently operating.

This pumping power generation is said to be the most economical means of energy storage for load control in national grids, accounting for 99% of the world's power storage capacity, including other technologies under development.

According to a report issued by the US Electricity Research Institute in March 2012, the world's total amount of pumped power is 127 GW, which is equivalent to 127 1000 MW thermal power plants. It can be saved and replaced when construction of a power plant of the corresponding size is provided by supplying electricity when the demand for afternoon power is highest.

In recent years, the development of the positive power generation technology has been developed in addition to the energy storage means for load control of the power grid, an adjustable speed pumped storage generator (Advanced Speed Pumped Storage Generator) has been developed to control the frequency fluctuations of the power grid system caused by the instantaneous load imbalance of the power grid, It is used to stabilize the voltage.

Thus, positive power generation is a technology that can be usefully used in countries where renewable energy sources such as wind and solar power generation, which are highly volatile in power supply, are increasing.

The prior art developed by such a positive power generation is a "positive power generation system" of the Republic of Korea Patent Publication No. 10-2012-0003791 (published on Jan. 11, 2012) disclosed in the following patent document.

The prior art is a vertical tubular turbine, vertical bellows to generate power to the water reservoir falling into the lower reservoir through the water pipe in the upper reservoir, the lower reservoir is installed at a lower position than the upper reservoir, the water inlet is continuously introduced through the water inlet Generator connected to tubular turbine outside, compressed air supply pipe for supplying air from air pump installed in upper reservoir into lower reservoir, air layer formed on lower reservoir by water and air supplied to lower reservoir Compressed air tank installed in the upper part of the lower reservoir to collect the air of the air layer by water pressure, and a pumping device that pumps the water stored in the lower reservoir to the upper reservoir by the hydraulic pressure. As water drops into the lower reservoir, By the generator.

[Preceding technical literature]

(Patent Document 1) Korean Unexamined Patent Publication No. 10-2012-0003791 (published Jan. 11, 2012) "Pumped Power Generation System"

The greatest weakness of the above-mentioned pumping power generation is that the nature of the facility should be rich in water around the upper reservoir or the lower reservoir, and if there is no natural altitude difference such as mountains, it is installed so that there is a considerable altitude difference between the upper reservoir and the lower reservoir. Since the power generation system installation cost is excessively required, a problem may occur.

Despite the merits of energy mass storage of pumped power generation, the ability to adjust the load on the grid and to maintain the frequency of the grid stably, the above-mentioned local constraints remain in the Middle East, Africa, It is difficult to be widely used in Europe and the US where environmental constraints are severe.

Therefore, the present invention was developed to improve the above problems, and an object of the present invention is to make the difference between the height required for the development of the two artificial lakes, the upper artificial reservoir and the lower artificial reservoir using the surrounding mountains, Method of constructing a pumping and power generation system using seawater that can effectively generate power by using seawater drawn to an artificial reservoir, including inland areas, and preventing corrosion of power generation facilities and generation of sediment when using seawater. It is to provide a driving method.

The object of the present invention is filled with seawater, the upper artificial reservoir and the lower artificial reservoir is installed at the drop height required for power generation; A high-power load is generated by the seawater falling from the upper artificial reservoir, and when surplus power, a positive generator consisting of a turbine and a motor for supplying the seawater of the lower artificial reservoir to the upper artificial reservoir; A substation of a power transmission / receiving power station that boosts the generated electricity of the positive power generator and transmits it to the electric power grid, and receives electric power of the electric power grid at the time of pumping; A filling / draining combined line for supplying seawater to an artificial reservoir through a seawater supply pipe connected to the inlet and discharging the seawater concentrate through a drainage pipe; The ballast water treatment system is installed at the intake side of the filling / drainage combined line to filter foreign matters and sterilizes and removes various marine life from the pipeline.

In addition, constructing the upper artificial reservoir and the lower artificial reservoir in which the sea water is stored with a height step and a low capacity required for power generation; Supplying the seawater collected through the seawater supply pipe to the upper and lower artificial reservoirs, and constructing a combined filling and draining line to discharge the seawater concentrate through the drainage pipe; Constructing a ballast water treatment system on an intake side of a combined filling and draining line; Constructing a positive power generator comprising a turbine and a motor to generate water falling from the upper artificial reservoir at peak load, and supply seawater of the lower artificial reservoir to the upper artificial reservoir when surplus power is generated; The substation construction step of receiving the electricity generated by the pump generator and boosting it and then transmitting it to the electric power grid, and receiving the power grid power when the surplus power is used, thereby driving the pump generator for pumping; by constructing the construction method of the pump generator system using seawater, It is possible.

In addition, the method of operating a pumped power generation system using the sea water of the present invention, the step of supplying the required amount of water to the upper artificial reservoir through filtration and sterilization of foreign matter through the ballast water treatment system of the combined charge and drainage line; At the time of high load of electricity, the positive and negative power generators generate power from the upper artificial reservoir, and the seawater used for power generation is collected in the lower artificial reservoir; Re-supplying the seawater of the lower artificial reservoir to the upper artificial reservoir with surplus power; Intermittent replenishment of filtered and sterile seawater if low capacity deficit is measured due to a reduction due to reasons such as natural evaporation during power generation; When the water quality due to the concentration of dissolved substances in the seawater used for power generation is determined to be lower than or equal to a predetermined value, discharging the concentrated substance together with the seawater through a replenishing and draining combined line, and replenishing and supplying clean seawater as much as the discharged quantity; It can be achieved by configuring.

The present invention is to install a relatively small diameter pipe to the shore to fill the seawater used for pumping power generation during the construction of the power plant, so even in a desert area or a dry inland area where water is precious and relatively far from the sea If there is only the difference in altitude, there is an effect that can be easily installed and pumped power generation.

In the event of evaporation or other natural decreases caused by continuous reuse of seawater, it is supplemented from time to time through the filling line, and the concentrated salt or other metal melts from continuous evaporation can be used for drainage if necessary. As it is possible to prevent the concentration of seawater and the formation of sediment, it is possible to reduce the installation cost of the filling and draining line, and the maintenance cost is low because the filling and draining operation can be easily performed.

In addition, it is possible to perform a leak test while having a sufficient water supply period to fill the seawater before the completion of the pumping power plant, and the pumping power generation mode according to the test operation can be easily performed according to local circumstances, thereby shortening the commissioning period.

1 is a view showing an example of a process diagram of a positive power generation system embodying the present invention

2 is a block diagram showing a construction process of a positive power generation system of the present invention

Hereinafter will be described in detail with reference to the accompanying drawings a preferred embodiment of the technical configuration and operation that can effectively achieve the object of the present invention.

1 is a schematic view showing an example of 400MW seawater pumping power generation process according to the present invention, the pumping power generation system using the seawater of the present invention, the upper artificial reservoir for dropping the filled seawater from the drop height required for power generation to the bottom ( 10a); It is installed under the upper artificial reservoir (10a) so that the drop height required for power generation is maintained, the lower artificial reservoir (10b) for receiving and storing sea water falling from the upper artificial reservoir (10a);

And it is installed between the upper artificial reservoir (10a) and the lower artificial reservoir (10b), when the power amount is high load to generate the seawater falling from the upper artificial reservoir (10a), when the surplus power seawater of the lower artificial reservoir (10b) Pump generator 40 consisting of a turbine 41 and a motor 42 for both pumping and power supply to the upper artificial reservoir (10a); It boosts the electricity generated by the pump generator (40) and transmits it to the power grid (70), when the pumping power transmission / receiving substation (50) receiving power from the power grid (70);

In addition, the intake port 21a supplies seawater taken through the seawater supply pipe 21 connected to the shore to the lower artificial reservoir 10b, and the upper artificial reservoir 10a through the drain pipe 22 connected to one side of the seawater supply pipe 21. A combination / drainage and drainage line (20) for discharging the seawater concentrate of the bottom artificial reservoir (10b); The ballast water treatment system installed on the intake port 21a side of the combined filling and draining line 20 to filter and filter foreign matters from the seawater, and sterilize and remove various marine organisms (seaweed, barnacles, etc.) from the pipeline. 30); characterized in that provided.

In the drawings, reference numeral 23 is a valve installed in the seawater supply pipe 21 and the drain pipe 22.

In the process of FIG. 1, the present invention has a 200mm drop between the upper artificial reservoir 10a and the lower artificial reservoir 10b, but since the potential energy is directly proportional to the distance of the drop, the larger the freefall between the two reservoirs, the lower the required storage. Capacity can be reduced proportionally, which can reduce the cost of civil works.

The seawater stored in the artificial reservoir for use in pumping power generation is flooded until the initial commissioning after construction of the plant through a pipeline consisting of seawater supply pipes 21 installed from the coast to the plant site at the beginning of the plant construction.

That is, when the drop distance is 200 m as shown in FIG. 1, the low water capacity required for the upper artificial reservoir 10a is required to be 7.2 million tons of seawater, which uses a pipeline of about 12 inches in diameter as the seawater supply pipe 21. This is enough capacity to fill over 12 months.

Therefore, this can be used to add water for at least six to twelve months before the pumping station is operated. In this case, it is possible to increase or decrease the length of the water supply by increasing or decreasing the pipe diameter as necessary.

The ballast water treatment system for ships installed near the seawater intake (21a) on the coast is a technology that has been developed and commercialized in accordance with the World Ocean Association's specifications in recent years. It supplies filtration, sterilization, purification, and purification of seawater that has lost sediments, algae, and marine life. .

The pumping power generation system using the seawater of the present invention pumps electricity of the electric power grid 70 through the substation 50 using the night time zone with the least demand for power during the day, and the motor 42 and the turbine 41 which combine power generation and power generation. When supplied to the water of the lower artificial reservoir (10b) is pumped and filled with the upper artificial reservoir (10a).

Thereafter, in the afternoon time when the power demand is rapidly increasing, power generation may be performed in accordance with the needs of the power grid 70 such as load regulation and frequency stabilization of the power grid 70.

That is, when the seawater of the upper artificial reservoir (10a) to the lower artificial reservoir (10b) for power generation, electricity is generated in the pump generator 40 consisting of the turbine 41 and the motor 42 by the falling force of the seawater In addition, the generated electricity is sent to the substation 50 to be boosted and then transmitted to the power grid 70 to achieve the load control and frequency stabilization of the power grid (70).

In addition, the role of environmentally friendly renewable energy to replace the gas-combined power plant, which must be additionally installed for the peak load of the power grid 70, which is continuously increased in such a closed loop. The maximum advantage of such a variable speed pumping power generation system is that it can make a great contribution to ensuring the stable operation of the power grid (70).

The seawater used in the pumped power generation is required to be intermittently supplemented since there is a natural decrease in evaporation or other advection if reused continuously. At this time, the water filling may be carried out by filtration sterilization treatment of the seawater taken into the water intake port 21a in the ballast water treatment system 30, and the filling / draining combined use line 20 may be switched to the water filling. Then, the filtered sterilized sea water is supplied to the lower artificial reservoir 10b for replenishment.

And, the continued evaporation of seawater often results in the concentration of electrolytes dissolved in the seawater used, and therefore only a small amount should be released. To this end, when the valve 23 on the sea water supply pipe 21 is closed and the valve 23 on the drain pipe 22 is opened, the filling / drainage combining line 20 is operated for drainage and, conversely, on the sea water supply pipe 21 side. When the valve 23 is opened and the drain pipe side valve 23 is closed, the filling / draining combined use line 20 is operated for filling.

As described above, the combined use of the filling and draining line 20 is used for both draining and refilling as necessary, so that various substances dissolved in the seawater of the artificial reservoir are not provided through the drainage pipe 22 without installing each line separately. It can be discharged from time to time to prevent the concentration of electrolytes and to fill the required quantity of clean sea water at any time, thereby reducing construction costs and generating electricity using clean, optimal seawater without concentration of electrolytes. It can increase.

In addition, one side of the lower artificial reservoir (10b) is provided with a water quality inspection station (60) to continuously measure the quantity and quality of water, and then to provide an appropriate amount of water supply and drainage, foreign matters when water is filled The ballast water treatment system 30 to be filtered is provided with a chemical additive input unit for injecting benzimidazole, imidazole, and the like whenever necessary to prevent corrosion by oxidation and suppress formation of precipitates. It is preferable.

Figure 2 is a block diagram showing the construction process of the pumping power generation system of the present invention, where the construction of the pumping power generation system using the seawater of the present invention in detail as follows.

Phase 1 (Construction of Upper Artificial Reservoir and Lower Artificial Reservoir)

This first step (S100) is a step of maintaining the height step required for power generation, maintaining the upper artificial reservoir (10a) and the lower artificial reservoir (10b) to draw and store the surrounding sea water, and to construct the required storage capacity.

Here, since the storage capacity of the upper artificial reservoir (10a) and the lower artificial reservoir (10b) is directly proportional to the free fall height, the larger the free fall between these upper and lower artificial reservoirs, the required storage capacity is reduced as shown in Table 1 below. The reservoir of these artificial reservoirs should be provided with a waterproof layer to prevent leakage.

Free fall (m) 100 200 300 Low capacity (㎥) 14,400,000 7,200,000 4,800,000 Reservoir Diameter (km) 1.5 1.5 1.5 Reservoir depth (m) 8.2 4.1 2.7

Civil engineering of the upper artificial reservoir (10a) and the lower artificial reservoir (10b) can be carried out by the most economical excavation method, but in some cases, the construction method or other methods, such as concrete surface water-repellent dam, or a combination thereof One method can be used. In addition, it is preferable to construct an artificial membrane (Geomembrane) excellent in the water repellency, durability and economical efficiency as the waterproof layer of the reservoir portion.

The storage capacity of the upper artificial reservoir (10a) and the lower artificial reservoir (10b) is preferably to be proportionally reduced as shown in the above [Table 1], the larger the drop between each other, which can lead to a reduction in civil construction cost.

* For example, the upper artificial reservoir (10a) and the lower artificial reservoir (10b), which constitutes 8 hours of storage and pumping power plant (free fall and water storage: about 80% efficiency, virtually as a cylindrical reservoir), are equal to 1.5km in diameter. If it is assumed to be formed to explain,

-If the drop is 100m, the storage capacity should be about 8.4m since the storage capacity of 14.4 million rubles (㎥) is needed.

-If the drop is 200m, the water storage capacity is about 7.2 million times (㎥), so the reservoir depth should be about 4.1m,

-If the drop is 300m, the water storage capacity is about 4.8 million times (㎥), so the reservoir depth should be about 2.7m.

Here, the numerical values are given as examples, and the actual conditions of the installation may change the design conditions depending on the topography or the economic conditions.

2nd stage (construction and drainage line construction)

The second step (S200) is filled and filled in the upper artificial reservoir (10a) and the lower artificial reservoir (10b) to combine the supply of seawater and discharge of seawater concentrate of the upper artificial reservoir (10a) and the lower artificial reservoir (10b) It is a step of constructing the combined drainage line 20.

A drain pipe 22 is provided at one end of the combined filling and draining line 20, and a sea water supply pipe 21, which will be described below, is used to double the filling and draining.

The seawater of the upper artificial reservoir (10a) and the lower artificial reservoir (10b) should be supplemented intermittently if there is a natural decrease due to evaporation or other reasons while continuing to use for power generation. If it is bad, it is necessary to replenish the clean sea water after discharging the concentrated materials. At this time, the single replenishment / drainage combined line 20 can be used for both replenishment and drainage, thereby simplifying construction and shortening the construction period. You can.

Step 3 (Construction stage of the seawater supply pipe connected to the coast)

In the third step (S300), the seawater is combined with the replenishing and draining line 20 and the coast to pump the seawater to the place where the upper artificial reservoir 10a and the lower artificial reservoir 10b are installed, including the inland province. The construction step is connected to the supply pipe (21).

4th stage (Construction of ballast water treatment system)

The fourth step (S400) is the ballast water on the intake port 21a side of the seawater supply pipe 21 so as to sterilize and remove foreign matters (parasites such as algae, barnacles, etc.) from the seawater and filtration of seawater to be supplied. This is the step of installing the processing system 30.

When the ballast water treatment system 30 is constructed, additives such as benzimidazole or imidazole, which can prevent corrosion and inhibit the formation of precipitates by oxidation, can be added as needed. This may include preparing a chemical additive input.

5th Stage (Construction of Pump Generator)

The fifth step (S500) is a step of constructing a pump generator 40 consisting of a turbine 41 and a motor 42 for both pumping and power generation between the upper artificial reservoir (10a) and the lower artificial reservoir (10b).

The pump generator 40 adopts a variable speed pumping power generation system technology (Adjustable Speed Storage Generator), which has been developed and used a lot in recent years, and generates power from seawater falling from the upper artificial reservoir 10a when the power consumption is the highest. In case of surplus power at low load, the seawater of the lower artificial reservoir 10b is supplied to the upper artificial reservoir 10a.

The variable speed pumping power generation system has an advantage in that the driving range can be easily adjusted in the pumping operation and can be adapted to the case of free fall fluctuation or light load during the power generation operation. The pump generator 40 is preferably made of a special steel material in order to prevent corrosion by sea water, and can be variously constructed, such as 400MW class 1 unit or 200MW class 2 unit as necessary.

6th step (Substation construction of transmission and reception)

The sixth step (S600) is a step of constructing a substation 50 for both transmission and reception.

The substation 50 for both power transmission / receiving power generates electricity in the positive power generator 40 and supplies the power to the electric power grid 70 after the power is boosted, and when the water is pumped, the power of the electric power grid 70 is transferred to the positive power generator. It supplies to 40 so that the turbine 41 and the motor 42 which combine pumping and power generation are driven.

The seventh step (water quality inspection station construction)

The seventh step (S700) is a step of constructing a water quality inspection station 60 for measuring the water quantity and water quality of the lower artificial reservoir (10b).

Then, the water quality is good by measuring the amount of seawater and the concentration of the seawater filled in the lower artificial reservoir (10b), but if the quantity is insufficient, the water is supplied through the seawater supply pipe (21), and the concentration and precipitation of dissolved various substances If this is bad, first drain the appropriate amount of seawater into the drain pipe 22 to discharge the concentrated and sedimented material, and then fill the water through the sea water supply pipe 21 according to the required low capacity to maintain the quantity and water quality necessary for power generation at all times. Can be a good development.

* Here, if the sea water is precious in the desert or inland region, the sea water just need to have a filling and drainage combined line (20), seawater supply pipe (21) and the ballast water treatment system (30) that is constructed in the second to fourth stages Since it can be brought to the desert or inland, it is easy to construct the pumping power generation system of the present invention anywhere.

And the filling and drainage combined line 20 and the ballast water treatment system 30 is to be provided first 6 months to 12 months before the start of the power plant construction, the pumping station is completed. Then, there will be an initial replenishment period of filling the reservoir with seawater for six to twelve months before the construction of the pumping plant is completed.

During this initial filling period, the upper artificial reservoir 10a and the lower artificial reservoir 10b are connected to both the filling and draining combined line 20 and the seawater supply pipe 21, so the initial filling is equal to the reservoir capacity of the reservoir. You can fill only one, but it's a good idea to fill both reservoirs in half. Then, it can be said that it is possible to perform the leak inspection of both reservoirs at the beginning, and to have the advantage that the pumping or power generation mode can be adapted to the local situation during the trial run.

The driving method for driving the pumped power generation system using the sea water of the present invention is as follows.

<Stage 1> Supplying seawater for power generation

That is, by using the pumping power generation system using the seawater of claim 1 or claim 2, the foreign matter is filtered through the ballast water treatment system 30 installed on the intake port 21a side of the combined charge and drainage line 20, and various marine The seawater sterilized by living organisms is supplied to the upper artificial reservoir 10a directly or through the lower artificial reservoir 10b in quantities necessary for power generation.

<Phase 2> Development

When the power load is high, the power generator 40 is composed of a turbine 41 and a motor 42 for both pumping and power generation. The generator generates power using seawater falling from the upper artificial reservoir 10a, and the seawater used for power generation is artificially lowered. It is collected to the reservoir 10b.

<Step 3> Pumping

When the surplus power is low due to low demand for electricity, the pumping generator 40 composed of a turbine 41 and a motor 42 for both pumping and power generation is operated to produce the seawater of the lower artificial reservoir 10b by an amount necessary for generating the upper artificial reservoir. It supplies to (10a).

<Step 4> Replenishing intermittent seawater needed for power generation

During the development and pumping into the seawater of the upper artificial reservoir (10a) and the lower artificial reservoir (10b), if it is determined that the low capacity is insufficient due to the reduction due to natural evaporation or other reasons, the filtration and sterilization in the ballast water treatment system 30 The sterilized sea water is intermittently replenished through the seawater supply pipe 21 of the filling and draining combined line 20.

The low water capacity measurement of the seawater is carried out in the water quality inspection station 60 provided to measure the amount of water, thereby supplementing the appropriate amount of water.

<Step 5> Dissolving Substances Discharge and Replenish Concentrated Seawater

When the water quality of the seawater stored in the lower artificial reservoir 10b is measured and the water quality is confirmed to be below the set value, the dissolved material concentrated through the drainage pipe 22 of the filling / drainage combined line 20 together with the seawater The required amount is discharged, and the discharged seawater is filtered and sterilized in the ballast water treatment system 30 through the seawater supply pipe 21.

The water quality measurement of the sea water is carried out in the water quality inspection station (60) provided to measure the water quality, whereby it is possible to give an appropriate amount of drainage and replenishment at any time, so that the water for power generation can always be maintained in a high quality state. have.

Here, in the first, fourth and fifth steps, the process of supplying seawater by filtration of foreign matters and various marine organisms through the ballast water treatment system 30 to prevent corrosion by oxidation and to generate precipitates It may include the process of adding a chemical additive to inhibit.

[Description of the code]

10a: upper artificial reservoir 10b: lower artificial reservoir

20: combined charge and drainage line 21: seawater supply pipe

21a: water inlet 22: drain pipe

23 valve 30 ballast water treatment system

40: pump generator 41: turbine

42: motor 50: substation

60: water quality testing station 70: power grid

Claims (4)

In the two-generation power generation system construction method, A first step of constructing the upper artificial reservoir (10a) and the lower artificial reservoir (10b), which draws and stores the surrounding sea water, with a height step and a low capacity required for power generation; The second step of constructing the filling / drainage combined line 20 having a drain pipe 22 at one end so as to serve both seawater supply and seawater concentrate discharge of the upper artificial reservoir 10a and the lower artificial reservoir 10b. ; A third step of constructing the seawater supply pipe 21 by connecting the seawater supply pipe 21 and the seawater supply and drainage line 20 so that the seawater on the coast can be supplied to the water supply and drainage line 20; A fourth step of constructing the ballast water treatment system 30 at the intake port 21a of the seawater supply pipe 21; The turbine 41 and the motor for both pumping and power generation are used to generate power from the upper artificial reservoir 10a at the peak load and to supply the seawater of the lower artificial reservoir 10b to the upper artificial reservoir 10a during surplus power. A fifth step of constructing the pump generator 40 consisting of 42; Receives the generated electricity of the pump generator 40, boosts it, transmits it to the power grid 70, and when the electric power grid 70 is supplied to the pump generator 40 when surplus power is supplied, the turbine 41 and the motor 42 are pumped for pumping. The sixth step of constructing the substation 50 of the transmission / reception faucet to be driven; Combined and drained line 20, seawater supply pipe 21, and ballast water treatment system 30 in the second to fourth stages are completed six to twelve months before the completion of the pumped-up power plant. Over six months to twelve months, either the upper artificial reservoir (10a) or the lower artificial reservoir (10b) is filled with water to meet the low capacity, or both of them fill the seawater by half of the low capacity. Construction method of a pumping power generation system using sea water, characterized in that it has an initial appending period. The method of claim 1, The seventh step of constructing the water quality inspection station 60 to measure the quantity and quality of water is added so that the appropriate amount of water can be filled and drained, The construction of the ballast water treatment system includes the construction of a pumped water power generation system using seawater, which includes construction of a chemical additive to prevent corrosion and inhibit the formation of sediment by oxidation. In the operation method of the pumped power generation system using sea water, Seawater is filled, the upper artificial reservoir (10a) and the lower artificial reservoir (10b) is installed at the drop height required for power generation; It is installed between the upper artificial reservoir (10a) and the lower artificial reservoir (10b), when the power amount is a high load to generate power to the seawater falling from the upper artificial reservoir (10a), when surplus power to the seawater of the lower artificial reservoir (10b) A pump generator 40 comprising a turbine 41 and a motor 42 for both pumping and power generation to supply the artificial reservoir 10a; A substation 50 of a transmission / receiving power transmission / receiving power supplied to the electric power grid 70 by boosting electricity generated by the pump generator 40 and being pumped; The water intake 21a is supplied to the lower artificial reservoir 10b through the seawater supply pipe 21 connected to the shore, and the seawater of the upper artificial reservoir 10a and the lower artificial reservoir 10b through the drain pipe 22. A filling / draining combined use line 20 for discharging the concentrate; Pumped water generation using a seawater consisting of; a ballast water treatment system (30) installed on the intake port (21a) side of the combined charge and drainage line 20 to filter foreign matter from the seawater, and sterilize and remove various marine life from the pipeline System or The water pumping system using the sea water is further provided with a water quality inspection station (60) capable of measuring the quantity and water quality of the water supply and drainage, the ballast water treatment system (30) to prevent corrosion by oxidation and By using a pumping power generation system using seawater further equipped with a chemical additive to suppress the formation of sediment Through the ballast water treatment system 30 installed at the intake port 21a side of the combined filling and draining line 20, the seawater which has filtered foreign matters and sterilized various marine organisms is directly or directly lower artificial artificial reservoir 10a. Supplying the quantity required for power generation through 10b; When the power load is high, the power generator 40 is composed of a turbine 41 and a motor 42 for both pumping and power generation. The generator generates power using seawater falling from the upper artificial reservoir 10a, and the seawater used for power generation is artificially lowered. Collecting to reservoir 10b; Supplying seawater of the lower artificial reservoir (10b) to the upper artificial reservoir (10a) by operating the pump generator (40) consisting of a turbine (41) and a motor (42) for both pumping and power generation; Intermittently replenishing the filtered and sterilized seawater through the seawater supply pipe 21 connected to the coast when it is determined that the low water capacity is insufficient due to a decrease due to natural evaporation or other reasons during power generation; When the quality of the seawater used for power generation is measured and the water quality is confirmed to be below the set value, the concentrated material is discharged together with the seawater through the drain pipe 22 of the combined charge and drainage line 20, and the amount of the discharged water. Replenishing the filtered and sterilized seawater as much as possible; Operation method of a pumped power generation system using sea water, characterized in that consisting of. The method of claim 3, wherein The process of supplying seawater by filtering foreign matters through the ballast water treatment system 30 and sterilizing and removing various marine organisms, A method of operating a pumped power generation system using seawater, comprising the step of introducing a chemical additive that prevents corrosion by oxidation and inhibits the formation of precipitates.

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