Superconducting pumped storage power station and operation method thereof

Abstract

The superconducting pumped storage power station comprises a reservoir and a water storage pond, the bottom of the reservoir is communicated with the top of a water inlet pipe, the bottom of the water inlet pipe is communicated with a water inlet of a hydraulic turbine, the water inlet pipe is provided with a water inlet electromagnetic valve and a flow meter, and a water outlet of the hydraulic turbine is communicated with the top of a water outlet pipe. One end of a main shaft of the hydraulic turbine is connected with an output shaft of the superconducting motor, the other end of the main shaft is connected with a rotating shaft at one end of the gearbox, a rotating shaft at the other end of the gearbox is connected with a shaft rod of the generator, and the generator is electrically connected with the temporary power storage station through the converter. The temporary power storage station can be connected into a power grid system through a boosting transformer, the top of the reservoir communicates with one end of a circulating pipe, the other end of the circulating pipe communicates with the bottom of the reservoir, and a circulating pump is arranged on the circulating pipe. The service life of the generator can be effectively prolonged while the electric energy conversion efficiency is ensured, and the production cost is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the field of pumped storage power stations, in particular to a superconducting pumped storage power station and an operation method thereof. Background Art

[0002] A pumped storage power station is a hydropower station that uses electricity during low load to pump water to an upper reservoir or a water storage tank, and releases water to a lower reservoir to generate electricity during peak load. It is also called a storage hydropower station. It can convert excess electricity during low load into high-value electricity during peak load. It is also suitable for frequency modulation and phase modulation, stabilizes the frequency and voltage of the power system, and is suitable for emergency standby. It can also improve the efficiency of thermal power plants and nuclear power plants in the system. However, at present, when using a pumped storage power station, there is a problem that the initial water flow cannot drive the hydraulic turbine to rotate stably to generate power. The water flow in the upper reservoir or water storage tank needs to be driven for a long time before it can drive the hydraulic turbine to rotate stably to achieve stable power generation of the generator. In the process of water flow, the current pumped storage power station cannot control the water flow speed, and the change of water flow speed will also cause the speed of the turbine in the hydraulic turbine to change, resulting in unstable power generation of the generator and power conversion loss. At the same time, it will also cause certain damage to the internal hardware of the generator, affecting the service life of the generator and increasing the production cost. Summary of the invention

[0003] The present invention provides a superconducting pumped storage power station and an operation method thereof, which are used to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] A superconducting pumped storage power station comprises a reservoir and a water storage tank, wherein the bottom of the reservoir is connected to the top of a water inlet pipe, the bottom of the water inlet pipe is connected to the water inlet of a hydraulic turbine, the water inlet pipe is provided with a water inlet solenoid valve and a flow meter capable of remotely transmitting data, the water outlet of the hydraulic turbine is connected to the top of a water outlet pipe, the bottom of the water outlet pipe is connected to the top of the water storage tank, both ends of the main shaft of the hydraulic turbine are arranged outside the hydraulic turbine, one end of the main shaft is connected to the output shaft of the superconducting motor through a first crankshaft torsional vibration damper, and the other end of the main shaft is connected to the output shaft of the superconducting motor through a second crankshaft torsional vibration damper. The device is connected to one end of the rotating shaft of the gear box, the other end of the rotating shaft of the gear box is connected to the shaft of the generator through the third crankshaft torsion damper, the generator is electrically connected to the temporary storage power station through the converter, the temporary storage power station can be connected to the power grid system through the step-up transformer, the top of the water reservoir is connected to one end of the circulation pipe, the other end of the circulation pipe is connected to the bottom of the water reservoir, a circulation pump is arranged on the circulation pipe, the superconducting motor and the circulation pump can be connected to the power grid system for power supply, and the water inlet solenoid valve, flow meter, superconducting motor, temporary storage power station and circulation pump can be electrically connected to the processor.

[0006] In the superconducting pumped storage power station as described above, a pressure pump is arranged on the water inlet pipe, and the pressure pump can be electrically connected to the processor.

[0007] In the superconducting pumped storage power station as described above, the temporary storage station comprises a group of lithium-ion battery packs, and the lithium-ion battery packs are initially in a fully charged state.

[0008] In the superconducting pumped storage power station as described above, the temporary storage station can be electrically connected to the water inlet electromagnetic valve, the flow meter, the superconducting motor, the circulation pump and the pressure pump.

[0009] In the superconducting pumped-storage power station as described above, the top of the water storage tank is connected to the water supply pipe, and the water supply pipe is provided with a water supply solenoid valve. The bottom of the water storage tank is connected to the water discharge pipe, and the water discharge solenoid valve and the water discharge pump are provided on the water discharge pipe. The water supply solenoid valve, the water discharge solenoid valve and the water discharge pump can be electrically connected to the processor.

[0010] In the superconducting pumped storage power station as described above, the water replenishment solenoid valve, the water discharge solenoid valve and the water discharge pump can be electrically connected to the temporary storage power station.

[0011] In the superconducting pumped storage power station as described above, a liquid level sensor is arranged on the top of the water reservoir, the liquid level sensor can be electrically connected to the processor, and the liquid level sensor can be electrically connected to the temporary storage station.

[0012] In the superconducting pumped storage power station as described above, the input power of the superconducting motor is 5000kw.

[0013] In the superconducting pumped-storage power station as described above, the output voltage of the converter is 220V.

[0014] A method for operating a superconducting pumped storage power station comprises the following steps:

[0015] Step 1: Real-time monitoring of the power consumption in the corresponding area. When the power load is low, the circulation pump is powered by the power grid system and controlled by the processor to start, and the water in the water storage tank is sent to the water storage tank at a high place through the circulation pipe. At this time, the water inlet solenoid valve and the pressure pump are closed;

[0016] Step 2: Real-time monitoring of the power consumption of the corresponding area. During the peak period of power load, the superconducting motor is powered by the power grid system and controlled by the processor to start the superconducting motor to drive the turbine in the hydraulic turbine to rotate stably. Then, the processor controls the water inlet solenoid valve and the pressure pump to start so that the water in the water reservoir forms a high-speed water flow and enters the hydraulic turbine through the water inlet pipe. The high-speed water flow passes through the hydraulic turbine and is sent to the water storage tank through the outlet pipe. The main shaft of the hydraulic turbine drives the generator to generate electricity through the gear box and the shaft of the generator. After the generator is rotated, a stable voltage is output through the converter to charge the temporary storage station. The temporary storage station then sends the boosted electricity to the power supply system through the step-up transformer. At the same time, the processor can also obtain the power storage status of the temporary storage station. The temporary storage station supplies power to other electrical components except the superconducting motor and the circulating pump in the present invention. At the same time, when there is sufficient electricity in the temporary storage station, it can also provide electricity for the superconducting motor and the circulating pump.

[0017] Step 3: The processor monitors the water flow rate and the liquid level in the water reservoir in real time through the flow meter and liquid level sensor. The processor controls the opening degree of the water inlet solenoid valve in real time according to the flow conditions to stabilize the flow rate. At the same time, when the liquid level in the water reservoir is lower than the preset value, the processor controls the circulation pump to start and drive the water in the water storage tank through the circulation pipe to the high water reservoir, thereby achieving continuous power generation to meet the demand during the peak period of power load.

[0018] The advantages of the present invention are as follows: the present invention uses a superconducting motor to quickly drive the turbine in the hydraulic turbine to rotate stably, and the electric energy conversion efficiency of the superconducting motor is very high, thereby reducing the intermediate electric energy loss. At the same time, the power generation of the present invention using the superconducting motor and water flow to drive the hydraulic turbine to rotate is higher than the power generation of the traditional pumped storage power station under the same conditions after removing the power consumption of the superconducting motor, thereby effectively improving the power generation and power generation efficiency of the pumped storage power station; at the same time, the flow rate is monitored in real time by the flow meter, and the water inlet solenoid valve and the pressure pump are set to effectively control the flow rate of the water flow, thereby ensuring that the turbine in the hydraulic turbine can rotate stably under the simultaneous action of the high-speed water flow and the superconducting motor. While ensuring the efficiency of electric energy conversion, the service life of the generator can be effectively improved, and the production cost is effectively reduced. Moreover, the circulating water in the present invention can be easily replaced through the water supply pipe and the water supply solenoid valve as well as the water discharge pipe, the water discharge solenoid valve and the water discharge pump. At the same time, the circulating water in the present invention is softened water with metal ions removed, which avoids the formation of scale and other debris in the circulating water during use, thereby affecting the rotation of the turbine in the hydraulic turbine and increasing the rotational resistance, thereby reducing the power generation efficiency and shortening the service life of the hydraulic turbine. At the same time, the circulating water in the present invention can be used as circulating water after collecting rainwater and flowing water and then softening it, thereby realizing the full utilization of natural resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural block diagram of the present invention.

[0022] Figure numerals: 1. water reservoir; 2. water storage tank; 3. water inlet pipe; 4. hydraulic turbine; 5. water inlet solenoid valve; 6. flow meter; 7. water outlet pipe; 8. main shaft; 9. first crankshaft torsional vibration damper; 10. superconducting motor; 11. second crankshaft torsional vibration damper; 12. gear box; 13. third crankshaft torsional vibration damper; 14. generator; 15. converter; 16. temporary storage power station; 17. step-up transformer; 18. circulation pipe; 19. circulation pump; 20. processor; 21. pressure pump; 22. water supply pipe; 23. water supply solenoid valve; 24. drain pipe; 25. drain solenoid valve; 26. drain pump; 27. liquid level sensor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] A superconducting pumped storage power station comprises a reservoir 1 and a water storage tank 2, wherein the volume of the reservoir 1 is greater than that of the water storage tank 2, the bottom of the reservoir 1 is connected to the top of a water inlet pipe 3, the bottom of the water inlet pipe 3 is connected to the water inlet of a hydraulic turbine 4, the water inlet pipe 3 is provided with a water inlet solenoid valve 5 and a flow meter 6 capable of remotely transmitting data, the water outlet of the hydraulic turbine 4 is connected to the top of a water outlet pipe 7, the bottom of the water outlet pipe 7 is connected to the top of the water storage tank 2, both ends of a main shaft 8 of the hydraulic turbine 4 are arranged outside the hydraulic turbine 4, one end of the main shaft 8 is connected to the output shaft of a superconducting motor 10 through a first crankshaft torsional vibration damper 9, and the other end of the main shaft 8 is connected to a gear box through a second crankshaft torsional vibration damper 11. One end of the gearbox 12 is connected to the shaft, the other end of the gearbox 12 is connected to the shaft of the generator 14 through the third crankshaft torsional vibration damper 13, the generator 14 is electrically connected to the temporary storage power station 16 through the converter 15, the temporary storage power station 16 can be connected to the power grid system through the step-up transformer 17 in a 35kv step-up manner, the top of the water reservoir 1 is connected to one end of the circulation pipe 18, the other end of the circulation pipe 18 is connected to the bottom of the water reservoir 2, a circulation pump 19 is arranged on the circulation pipe 18, the superconducting motor 10 and the circulation pump 19 can be connected to the power grid system for power supply, and the water inlet solenoid valve 5, flow meter 6, superconducting motor 10, temporary storage power station 16 and circulation pump 19 can be electrically connected to the processor 20.

[0025] Specifically, a pressure pump 21 is provided on the water inlet pipe 3 of the present embodiment, and the pressure pump 21 can be electrically connected to the processor 20. The pressure pump 21 can pressurize the water flowing out of the water reservoir 1 through the water inlet pipe 3 to increase the flow rate of the water, thereby ensuring that the water reservoir 1 can be built at a relatively low height and still ensure the flow rate of the water entering the hydro turbine 4, thereby improving the power generation efficiency.

[0026] Specifically, the temporary power storage station 16 described in this embodiment includes a plurality of lithium-ion battery groups, and the lithium-ion battery groups are initially fully charged.

[0027] More specifically, the temporary power storage station 16 described in this embodiment can be electrically connected to the water inlet solenoid valve 5 , the flow meter 6 , the superconducting motor 10 , the circulation pump 19 and the pressure pump 21 .

[0028] More specifically, the top of the water storage tank 2 described in this embodiment is connected with the water supply pipe 22, and the water supply solenoid valve 23 is arranged on the water supply pipe 22. The bottom of the water storage tank 2 is connected with the water discharge pipe 24, and the water discharge solenoid valve 25 and the water discharge pump 26 are arranged on the water discharge pipe 24. The water supply solenoid valve 23, the water discharge solenoid valve 25 and the water discharge pump 26 can be electrically connected with the processor 20. In the present invention, when the water circulates in the water storage tank 1 and the water storage tank 2 for a certain period of time and then all the water is sent to the water storage tank 2, the processor 20 controls the water discharge solenoid valve 25 and the water discharge pump 26 to open and discharge all the water in the water storage tank 2 through the water discharge pipe 24, and then closes the water discharge solenoid valve 25 and the water discharge pump 26, and then the processor 20 controls the water supply solenoid valve 23 to open, and a specified amount of water is added through the water supply pipe 22, and then the water supply solenoid valve 23 is closed to complete the water change operation, which is convenient for use.

[0029] Furthermore, the water replenishment solenoid valve 23 , the water discharge solenoid valve 25 and the water discharge pump 26 described in this embodiment can be electrically connected to the temporary power storage station 16 .

[0030] Furthermore, a liquid level sensor 27 is provided on the top of the water storage tank 1 described in this embodiment, and the liquid level sensor 27 can be electrically connected to the processor 20 , and the liquid level sensor 27 can be electrically connected to the temporary storage power station 16 .

[0031] Furthermore, the input power of the superconducting motor 10 described in this embodiment is 5000kw.

[0032] Furthermore, the output voltage of the converter 15 described in this embodiment is 220V.

[0033] A method for operating a superconducting pumped storage power station comprises the following steps:

[0034] Step 1: Real-time monitoring of the power consumption of the corresponding area. When the power load is low, the circulation pump 19 is powered by the power grid system and the circulation pump 19 is controlled by the processor 20 to start, and the water in the water storage tank 2 is sent to the high water storage tank 1 through the circulation pipe 18. At this time, the water inlet solenoid valve 5 and the pressure pump 21 are closed;

[0035] Step 2: Real-time monitoring of the power consumption of the corresponding area. During the peak period of power load, the superconducting motor 10 is powered by the power grid system and controlled by the processor 20 to start the superconducting motor 10 to drive the turbine in the hydraulic turbine 4 to rotate stably. Then, the processor 20 controls the water inlet solenoid valve 5 and the pressure pump 21 to start so that the water in the reservoir 1 forms a high-speed water flow through the water inlet pipe 3 and enters the hydraulic turbine 4. The high-speed water flow passes through the hydraulic turbine 4 and is sent to the water storage tank 2 through the outlet pipe 7. The main shaft 8 of the hydraulic turbine 4 drives the generator 14 to generate electricity through the gear box 12 and the shaft of the generator 14. After the generator 14 generates electricity, it outputs a stable voltage through the converter 15 and charges the temporary storage station 16. After the temporary storage station 16 is full of electricity, the boosted electricity is sent to the power supply system through the boost transformer 17. At the same time, the processor 20 can also obtain the power storage status of the temporary storage station 16. The temporary storage station 16 supplies power to other electrical components except the superconducting motor 10 and the circulating pump 19 in the present invention.

[0036] Step three: The processor 20 monitors the water flow rate and the liquid level in the water reservoir 1 in real time through the flow meter 6 and the liquid level sensor 27. The processor 20 controls the opening degree of the water inlet solenoid valve 5 in real time according to the flow conditions to stabilize the flow rate. At the same time, when the liquid level in the water reservoir 1 is lower than the preset value, the processor 20 controls the circulation pump 19 to start and drive the water in the water storage tank 2 to be sent to the high water reservoir 1 through the circulation pipe 18, so as to achieve continuous power generation to meet the demand during the peak period of power load; at the same time, because the circulation pump 19 is connected to the power grid when the power load is low, the water in the water storage tank 2 is sent to the high water reservoir 1 through the circulation pipe 18.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A superconducting pumped storage power station, characterized in that: The invention comprises a water reservoir (1) and a water storage tank (2), wherein the bottom of the water reservoir (1) is connected to the top of a water inlet pipe (3), the bottom of the water inlet pipe (3) is connected to the water inlet of a hydraulic turbine (4), the water inlet pipe (3) is provided with a water inlet solenoid valve (5) and a flow meter (6) capable of remotely transmitting data, the water outlet of the hydraulic turbine (4) is connected to the top of a water outlet pipe (7), the bottom of the water outlet pipe (7) is connected to the top of the water storage tank (2), both ends of the main shaft (8) of the hydraulic turbine (4) are arranged outside the hydraulic turbine (4), one end of the main shaft (8) is connected to the output shaft of a superconducting motor (10) through a first crankshaft torsional vibration damper (9), and the other end of the main shaft (8) is connected to a rotating shaft of a gear box (12) through a second crankshaft torsional vibration damper (11), The other end of the rotating shaft of the gear box (12) is connected to the shaft of the generator (14) through a third crankshaft torsion damper (13); the generator (14) is electrically connected to the temporary power storage station (16) through an inverter (15); the temporary power storage station (16) can be connected to the power grid system through a step-up transformer (17); the top of the water reservoir (1) is connected to one end of a circulation pipe (18); the other end of the circulation pipe (18) is connected to the bottom of the water reservoir (2); a circulation pump (19) is arranged on the circulation pipe (18); the superconducting motor (10) and the circulation pump (19) can be connected to the power grid system for power supply; the water inlet solenoid valve (5), the flow meter (6), the superconducting motor (10), the temporary power storage station (16) and the circulation pump (19) can be electrically connected to the processor (20).

2. A superconducting pumped storage power station according to claim 1, characterized in that: A pressure pump (21) is provided on the water inlet pipe (3), and the pressure pump (21) can be electrically connected to the processor (20).

3. A superconducting pumped storage power station according to claim 1, characterized in that: The temporary power storage station (16) comprises a plurality of lithium-ion battery groups, and the lithium-ion battery groups are initially in a fully charged state.

4. A superconducting pumped storage power station according to claim 1 or 2, characterized in that: The temporary power station (16) can be electrically connected to the water inlet electromagnetic valve (5), the flow meter (6), the superconducting motor (10), the circulation pump (19) and the pressure pump (21).

5. A superconducting pumped storage power station according to claim 1, characterized in that: The top of the water storage tank (2) is connected to a water supply pipe (22), and a water supply solenoid valve (23) is arranged on the water supply pipe (22). The bottom of the water storage tank (2) is connected to a water discharge pipe (24), and a water discharge solenoid valve (25) and a water discharge pump (26) are arranged on the water discharge pipe (24). The water supply solenoid valve (23), the water discharge solenoid valve (25) and the water discharge pump (26) can be electrically connected to the processor (20).

6. A superconducting pumped storage power station according to claim 5, characterized in that: The water replenishment solenoid valve (23), the water discharge solenoid valve (25) and the water discharge pump (26) can be electrically connected to the temporary power storage station (16).

7. A superconducting pumped storage power station according to claim 1, characterized in that: A liquid level sensor (27) is arranged on the top of the water reservoir (1); the liquid level sensor (27) can be electrically connected to the processor (20); and the liquid level sensor (27) can be electrically connected to the temporary power storage station (16).

8. A superconducting pumped storage power station according to claim 1, characterized in that: The input power of the superconducting motor (10) is 5000kw.

9. A superconducting pumped storage power station according to claim 1, characterized in that: The output voltage of the converter (15) is 220V.

10. A method for operating a superconducting pumped storage power station, characterized in that: The steps include: Step 1: Real-time monitoring of the power consumption of the corresponding area. When the power load is low, the circulation pump (19) is powered by the power grid system and the circulation pump (19) is controlled to start by the processor (20), and the water in the water storage tank (2) is sent to the water storage tank (1) at a high place through the circulation pipe (18). At this time, the water inlet solenoid valve (5) and the pressure pump (21) are closed; Step 2: Real-time monitoring of the power consumption of the corresponding area. During the peak period of power load, the superconducting motor (10) is powered by the power grid system and controlled by the processor (20) to start the superconducting motor (10) to drive the turbine in the hydraulic turbine (4) to rotate stably. Then, the processor (20) controls the water inlet solenoid valve (5) and the pressure pump (21) to start so that the water in the water reservoir (1) forms a high-speed water flow and enters the hydraulic turbine (4) through the water inlet pipe (3). After passing through the hydraulic turbine (4), the high-speed water flow is sent into the water reservoir (2) through the water outlet pipe (7). The main shaft (8) of the hydraulic turbine (4) is connected to the gear box (12). The shaft of the generator (14) rotates to drive the generator (14) to generate electric energy, which is then outputted as a stable voltage by the converter (15) for charging the temporary storage station (16). The temporary storage station (16) then sends the stepped-up electric energy to the power supply system through the step-up transformer (17). Meanwhile, the processor (20) can also obtain the electric energy storage status of the temporary storage station (16). The temporary storage station (16) supplies power to other electric components except the superconducting motor (10) and the circulating pump (19) in the present invention. Meanwhile, when the electric energy in the temporary storage station (16) is sufficient, the temporary storage station (16) can also provide electric energy to the superconducting motor (10) and the circulating pump (19). Step 3: The processor (20) monitors the water flow rate and the liquid level in the water reservoir (1) in real time through the flow meter (6) and the liquid level sensor (27). The processor (20) controls the opening degree of the water inlet solenoid valve (5) in real time according to the flow rate to stabilize the flow rate. At the same time, when the liquid level in the water reservoir (1) is lower than the preset value, the processor (20) controls the circulation pump (19) to start and drive the water in the water storage tank (2) to be sent into the high water reservoir (1) through the circulation pipe (18), thereby achieving continuous power generation to meet the demand during the peak period of power load.

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