Integrated adjusting type power station based on compressed air energy storage technology

Abstract

The invention discloses an integrated adjusting type power station based on the compressed air energy storage technology, and belongs to the technical field of energy storage, the power station comprises a compressor unit, an expansion generator unit, a heat exchange unit, a heat storage unit, an air storage unit and a reuse motor unit, and an air turbine of the adjusting type power station is connected with the reuse motor through a clutch; the multiplex motor is connected with an external 220kV power grid through a first electric brake, and the multiplex motor is connected with an external 10kV power grid through a second electric brake; the operation modes of the power station comprise a phase modulation working condition mode, an energy storage and phase modulation parallel working condition mode and a power generation working condition mode, the three working condition modes of power generation, phase modulation and energy storage and phase modulation parallel are provided, the energy storage and power generation working conditions only existing in traditional compressed air energy storage are expanded, 24-hour uninterrupted use of a power generator set is achieved, and the power generation efficiency is improved. The use frequency of power station equipment is improved, the stable supporting capacity for a power grid is improved, meanwhile, the operation duration of the multiplex motor is prolonged, the idle rate of the equipment is reduced, and the problem that the service life of the equipment is shortened due to starting and stopping of the equipment is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and in particular relates to an integrated regulating power station based on compressed air energy storage technology. Background Art

[0002] As the penetration rate of new energy sources increases, the power system will present a "double high" feature - a high proportion of renewable energy and a high proportion of power electronic equipment access. On the one hand, the "double high" phenomenon causes temporal imbalance and spatial mismatch in electricity. In the traditional mode, power production and consumption require real-time balance, while wind and solar power generation is intermittent, volatile and random, and is unbalanced in time. At the same time, my country's three northern regions are rich in wind and solar resources, while the load centers are mainly in the central and eastern regions, resulting in spatial mismatch. On the other hand, the increase in the proportion of DC power in the system also reduces the system inertia and short-circuit capacity of the synchronous AC power grid, weakens the anti-disturbance capability, makes the fault characteristics and chain reactions more complex, and faces challenges in the safe operation of the system.

[0003] As the "double high" characteristics of the new power system become increasingly prominent, the demand for new energy storage with long cycle, high safety and physical rotational inertia is becoming more urgent. Compressed air energy storage has the characteristics of fast start and stop, power ramping, wide range of active and reactive power regulation, etc. It will become an incremental flexible regulating power source, and can also be used as a regulating power source for "wind and solar green power transmission", helping the clean and low-carbon power in the three northern regions to be transmitted to the central and eastern regions. At the same time, the compressed air energy storage power station is equipped with an air turbine + synchronous generator set, which is an important source of rotational inertia in the future. Like thermal power, it is a synchronous generator with the same reactive power response characteristics, which can enhance the short-circuit capacity of the system. Therefore, as a long-term physical energy storage method, the compressed air energy storage power station designs and develops an integrated regulating power station based on compressed air energy storage technology. The integrated regulating power station takes into account both inertia support and reactive power response for the system, and well solves the "double high" problem in the power system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention discloses an integrated regulating power station based on compressed air energy storage technology.

[0005] The present invention adopts the following technical solution:

[0006] An integrated regulating power station based on compressed air energy storage technology, the power station comprising: a compressor unit, an expansion generator unit, a heat exchange unit, a heat storage unit, a gas storage unit and a multiplexing generator unit;

[0007] The compressor unit comprises a compressor and an electric motor, and the compressor unit is used for compressing air to store energy;

[0008] The expansion generator set includes an air turbine, and the expansion generator set is used to generate electricity through the air turbine;

[0009] The heat exchange unit includes a heat exchanger and a reheater, wherein the heat exchanger is used to cool the compressed air, and the reheater heats the compressed air for expansion and power generation;

[0010] The heat storage unit includes a hot water storage tank, a hot water pump, a cold water storage tank, and a cold water pump, and the heat storage unit is used for cooling and heating the heat exchange unit;

[0011] The gas storage unit comprises a gas storage reservoir, a gas storage reservoir inlet regulating valve, and a gas storage reservoir outlet regulating valve, and the gas storage unit is used to store compressed air;

[0012] The multiplexing motor group includes a multiplexing motor, a clutch, a first switch and a second switch, and the multiplexing motor group is used for switching the operation mode of the power station;

[0013] The air turbine is connected to the multiplexing motor through the clutch, the multiplexing motor is connected to the external 220kV power grid through the first switch, and the multiplexing motor is connected to the external 10kV power grid through the second switch;

[0014] The operation modes of the power station include: a phase adjustment mode, an energy storage and phase adjustment parallel mode, and a power generation mode.

[0015] Further, the compressor is connected to the motor, the compressor outlet is connected to the heat exchanger air inlet, the heat exchanger air outlet is connected to the gas storage inlet regulating valve, the gas storage inlet regulating valve is connected to the gas storage, the gas storage is connected to the gas storage outlet regulating valve, the gas storage outlet regulating valve is connected to the reheater air inlet, and the reheater air outlet is connected to the air turbine;

[0016] The outlet of the cold water storage tank is connected to the cold water pump, the water outlet of the cold water pump is connected to the water side inlet of the heat exchanger, and the water side outlet of the heat exchanger is connected to the hot water storage tank; the water outlet of the hot water storage tank is connected to the hot water pump, the water outlet of the hot water pump is connected to the water side inlet of the reheater, and the water side outlet of the reheater is connected to the cold water storage tank.

[0017] Furthermore, the phase-adjusting operating mode includes: in the phase-adjusting operating mode, the compressor and the air turbine are in a stopped working state, the gas storage inlet regulating valve and the gas storage outlet regulating valve are both in a closed state, the clutch between the air turbine and the multiplexing motor is in a disengaged state, and the multiplexing motor operates in a phase-adjusting state; the multiplexing motor drives the multiplexing motor to work by drawing power from the power grid, controls the excitation size and thus controls the reactive power size.

[0018] Furthermore, the energy storage and phase adjustment parallel operating mode includes: in the energy storage plus phase adjustment operating mode, the air turbine is in a stopped working state, the gas storage reservoir outlet regulating valve is closed, the compressor is in an operating state, the gas storage reservoir inlet regulating valve is open, the clutch between the air turbine and the multiplexing motor is in a disengaged state, and the multiplexing motor operates in a phase adjustment state.

[0019] Furthermore, the energy storage and phase modulation parallel working mode includes: the multiplexing motor drives the multiplexing motor to work by drawing power from the power grid, controlling the excitation size and thus controlling the reactive power size.

[0020] Furthermore, the power generation operating mode includes: in the power generation operating mode, the compressor is in a stopped state, the gas storage reservoir inlet regulating valve is closed, the air turbine is in an operating state, the gas storage reservoir outlet regulating valve is open, the clutch between the air turbine and the reused motor is in a coupled state, and the reused motor operates in a full-power power generation state.

[0021] Furthermore, the power generation mode includes: controlling the hot water flow by controlling the speed of the hot water pump, controlling the opening size of the gas storage outlet regulating valve to control the air flow, and then controlling the output of active power; outputting smaller reactive power through the excitation size of the excitation control system.

[0022] Furthermore, the method for switching the phase-shifting operating mode to the power generation operating mode includes: the operating personnel receives a switching instruction, opens the gas storage outlet regulating valve, and the compressed air in the gas storage flows into the air turbine. Driven by the compressed air, the speed of the air turbine gradually increases to the rated speed; at the same time, the first switch remains in a closed state, the reuse motor is adjusted to a no-load state, and the clutch is coupled to the external 220kV power grid for grid connection; thereafter, the active output of the reuse motor is gradually increased until the rated power generation power is reached.

[0023] Furthermore, the method for switching the power generation operating mode to the phase-shifting operating mode includes: the operating personnel receives a switching instruction and gradually reduces the opening of the gas storage outlet regulating valve until the gas storage outlet regulating valve is closed; the amount of gas sent to the air turbine from the gas storage is reduced by reducing the opening of the gas storage outlet regulating valve, the speed of the air turbine is gradually reduced, and the load of the multiplexing motor is reduced; the first switch between the external 220kV power grid and the multiplexing motor is cut off, and the clutch is separated; the second switch between the external 10kV power grid and the multiplexing motor is closed, and the multiplexing motor draws power from the external 10kV power grid to drive the multiplexing motor to work; after the multiplexing motor reaches the conditions for re-connection to the external 220kV power grid, the second switch is disconnected, and the first switch is closed again to realize the multiplexing motor being connected to the external 220kV power grid and entering the phase-shifting operating condition.

[0024] Furthermore, the method for switching the power generation operating mode to the energy storage and phase modulation parallel operating mode includes: the operating personnel receives a switching instruction, gradually reduces the opening of the gas storage reservoir outlet regulating valve until the gas storage reservoir outlet regulating valve is closed, and the amount of gas sent to the air turbine from the gas storage reservoir is reduced by reducing the opening of the gas storage reservoir outlet regulating valve, the air turbine speed gradually decreases, and the load of the multiplexing motor decreases; the first switch between the external 220kV power grid and the multiplexing motor is cut off, and the clutch is separated; the second switch between the external 10kV power grid and the multiplexing motor is closed, and the multiplexing motor draws power from the external 10kV power grid to drive the multiplexing motor to work; after the multiplexing motor reaches the conditions for re-connection to the external 220kV power grid, the second switch is disconnected, and the first switch is closed to realize the multiplexing motor being connected to the external 220kV power grid and operating in the phase modulation condition; at the same time, the gas storage reservoir inlet regulating valve is opened, the compressor is running, and high-pressure air is injected into the gas storage reservoir.

[0025] Beneficial effects:

[0026] (1) The integrated regulating power station of the present invention realizes the integrated functions of energy storage and phase adjustment through system configuration optimization and transformation, realizes the regulation to the four quadrants of active and reactive power, and provides a large rotational inertia and dynamic reactive power support while realizing the "peak shaving and valley filling" of electric energy, maintains the stability of the synchronous AC system, and effectively solves the contradiction between power imbalance and system imbalance in the new power system.

[0027] (2) The integrated regulating power station of the present invention can maintain continuous rotation operation for 24 hours a day, provide uninterrupted rotational inertia and voltage support in real time, and realize active power mode switching according to demand.

[0028] (3) The integrated regulating power station of the present invention provides three operating conditions: power generation, phase adjustment, energy storage and parallel phase adjustment, which expands the energy storage and power generation conditions of traditional compressed air energy storage, realizes the uninterrupted use of the generator set for 24 hours, increases the frequency of use of power station equipment, and improves the stable support capacity of the power grid.

[0029] (4) The present invention provides a driving scheme for a multiplexed motor. Through the power-receiving driving scheme, the multiplexed motor operates in a phase-modulated state and is driven by power from the power grid. It can consume less reactive power and generate more reactive power.

[0030] (5) The integrated regulating power station disclosed in the present invention greatly improves the operating time of the reused motor, reduces the equipment idle rate, and avoids the problem of shortening the equipment life caused by starting and stopping the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of power generation conditions of an integrated regulating power station based on compressed air energy storage technology of the present invention;

[0033] Figure 2 It is a schematic diagram of the phase adjustment working condition and energy storage and phase adjustment parallel working condition of an integrated regulating power station based on compressed air energy storage technology of the present invention;

[0034] Figure 3 It is a schematic diagram of the operating conditions of an integrated regulating system based on a compressed air energy storage power station of the present invention.

[0035] Illustration: compressor-1, heat exchanger-2, reheater-3, air turbine-4, electric motor-5, reusing motor-6, hot water storage tank-7, cold water storage tank-8, gas storage reservoir-9, gas storage reservoir inlet regulating valve-10, gas storage reservoir outlet regulating valve-11, hot water pump-12, cold water pump-13, external 220kV power grid-14, clutch-15, external 10kV power grid-16, second switch-17, first switch-18. DETAILED DESCRIPTION

[0036] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] It should be clear that the described embodiments are only 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.

[0038] Example 1

[0039] like Figure 1 As shown, an integrated regulating power station based on compressed air energy storage technology, the power station includes: a compressor unit, an expansion generator unit, a heat exchange unit, a heat storage unit, a gas storage unit and a multiplexing generator unit;

[0040] The compressor unit comprises a compressor 1 and a motor 5, and the compressor unit is used for compressing air to store energy;

[0041] The expansion generator set comprises an air turbine 4, and the expansion generator set is used to generate electricity through the air turbine 4;

[0042] The heat exchange unit includes a heat exchanger 2 and a reheater 3, wherein the heat exchanger 2 is used to cool the compressed air, and the reheater 3 heats the compressed air for expansion and power generation;

[0043] The heat storage unit includes a hot water storage tank 7, a hot water pump 12, a cold water storage tank 8, and a cold water pump 13. The heat storage unit is used for cooling and heating the heat exchange unit;

[0044] The gas storage unit comprises a gas storage reservoir 9, a gas storage reservoir inlet regulating valve 10, and a gas storage reservoir outlet regulating valve 11, and the gas storage unit is used to store compressed air;

[0045] The multiplexing motor group includes a multiplexing motor 6, a clutch 15, a first electric switch 18 and a second electric switch 17, and the multiplexing motor group is used for switching the operation mode of the power station;

[0046] The air turbine is connected to the multiplexing motor 6 through the clutch 15, the multiplexing motor 6 is connected to the external 220kV power grid 14 through the first switch 18, and the multiplexing motor 6 is connected to the external 10kV power grid 16 through the second switch 17;

[0047] The operation modes of the power station include: a phase adjustment mode, an energy storage and phase adjustment parallel mode, and a power generation mode.

[0048] Further, the compressor 1 is connected to the motor 5, the compressor 1 outlet is connected to the air inlet of the heat exchanger 2, the air outlet of the heat exchanger 2 is connected to the gas storage inlet regulating valve 10, the gas storage inlet regulating valve 10 is connected to the gas storage 9, the gas storage 9 is connected to the gas storage outlet regulating valve 11, the gas storage outlet regulating valve 11 is connected to the air inlet of the reheater 3, and the air outlet of the reheater 3 is connected to the air turbine 4;

[0049] The outlet of the cold water storage tank 8 is connected to the cold water pump 13, the water outlet of the cold water pump 13 is connected to the water side inlet of the heat exchanger 2, and the water side outlet of the heat exchanger 2 is connected to the hot water storage tank 7; the water outlet of the hot water storage tank 7 is connected to the hot water pump 12, the water outlet of the hot water pump 12 is connected to the water side inlet of the reheater 3, and the water side outlet of the reheater 3 is connected to the cold water storage tank 8.

[0050] Furthermore, the phase-adjusting operating mode includes: in the phase-adjusting operating mode, the compressor 1 and the air turbine 4 are in a stopped working state, the gas storage inlet regulating valve 10 and the gas storage outlet regulating valve 11 are both in a closed state, the clutch 15 between the air turbine 4 and the multiplexing motor 6 is in a separated state, and the multiplexing motor 6 operates in a phase-adjusting state; the multiplexing motor 6 drives the multiplexing motor 6 to work by drawing electricity from the power grid, controls the excitation size and thus controls the reactive power size.

[0051] Furthermore, the energy storage and phase adjustment parallel operating mode includes: in the energy storage plus phase adjustment operating mode, the air turbine 4 is in a stopped working state, the gas storage reservoir outlet regulating valve 11 is closed, the compressor 1 is in an operating state, the gas storage reservoir inlet regulating valve 10 is open, the clutch 15 between the air turbine 4 and the reuse motor 6 is in a disengaged state, and the reuse motor 6 operates in a phase adjustment state.

[0052] Furthermore, the energy storage and phase modulation parallel working mode includes: the multiplexing motor 6 is driven to work by taking electricity from the power grid, and the excitation size is controlled to control the reactive power size.

[0053] Furthermore, the power generation operating mode includes: in the power generation operating mode, the compressor 1 is in a stopped state, the gas storage reservoir inlet regulating valve 10 is closed, the air turbine 4 is in an operating state, the gas storage reservoir outlet regulating valve 11 is open, the clutch 15 between the air turbine 4 and the reuse motor 6 is in a coupled state, and the reuse motor 6 operates in a full power generation state.

[0054] Furthermore, the power generation mode includes: controlling the hot water flow by controlling the rotation speed of the hot water pump 12, controlling the air flow by controlling the opening size of the gas storage outlet regulating valve 11, and then controlling the output of active power; outputting a smaller reactive power by adjusting the excitation size of the excitation control system.

[0055] Furthermore, the method for switching the phase-shifting operating mode to the power generation operating mode includes: the operating personnel receives a switching instruction, opens the gas storage outlet regulating valve 11, and the compressed air in the gas storage 9 flows into the air turbine 4. Driven by the compressed air, the speed of the air turbine 4 gradually increases to the rated speed; at the same time, the first switch 18 remains in a closed state, the multiplexing motor 6 is adjusted to a no-load state, and the clutch 15 is coupled to the external 220kV power grid to achieve grid connection; thereafter, the active output of the multiplexing motor 6 is gradually increased until the rated power generation power is reached.

[0056] Furthermore, the method for switching the power generation operating mode to the phase-shifting operating mode includes: the operating personnel receives a switching instruction and gradually reduces the opening of the gas storage outlet regulating valve 11 until the gas storage outlet regulating valve 11 is closed; the amount of gas sent from the gas storage 9 to the air turbine 4 is reduced by reducing the opening of the gas storage outlet regulating valve 11, the speed of the air turbine 4 is gradually reduced, and the load of the multiplexing motor 6 is reduced; the first switch 18 between the external 220kV power grid 14 and the multiplexing motor 6 is cut off, and the clutch 15 is separated; the second switch 17 between the external 10kV power grid 16 and the multiplexing motor 6 is closed, and the multiplexing motor 6 draws power from the external 10kV power grid 16 to drive the multiplexing motor 6 to work; after the multiplexing motor 6 reaches the conditions for re-connection to the external 220kV power grid 14, the second switch 17 is disconnected, and the first switch 18 is closed to realize the multiplexing motor 6 being connected to the external 220kV power grid 14 and entering the phase-shifting operating condition.

[0057] Furthermore, the method for switching the power generation mode to the energy storage and phase adjustment parallel mode includes: the operator receives a switching instruction, gradually reduces the opening of the gas storage outlet regulating valve 11, until the gas storage outlet regulating valve 11 is closed, and the gas volume sent to the air turbine 4 from the gas storage 9 is reduced by reducing the opening of the gas storage outlet regulating valve 11, the speed of the air turbine 4 is gradually reduced, and the load of the multiplexing motor 6 is reduced; the first switch 18 between the external 220kV power grid 14 and the multiplexing motor 6 is cut off, and the clutch 15 is disengaged; the external The second switch 17 between the external 10kV power grid 16 and the reused motor 6 is closed, and the reused motor 6 draws power from the external 10kV power grid 16 to drive the reused motor 6 to work; after the reused motor 6 reaches the conditions for being connected to the external 220kV power grid 14, the second switch 17 is disconnected, and then the first switch 18 is closed to realize the reused motor 6 being connected to the external 220kV power grid and operating in a phase-shifting condition; at the same time, the gas storage inlet regulating valve 10 is opened, and the compressor 1 is running to inject high-pressure air into the gas storage 9.

[0058] Example 2

[0059] An integrated regulating power station based on compressed air energy storage technology, the integrated regulating power station comprises a compressor unit, an expansion generator unit, a heat exchange unit, a heat storage unit, a gas storage unit and a multiplexing generator unit.

[0060] The compressor unit comprises a compressor 1 and a motor 5 .

[0061] The expansion generator set includes an air turbine 4, a clutch 15, a multiplexing motor 6, a first switch 18, and a second switch 17.

[0062] The heat exchange unit includes a heat exchanger 2 and a reheater 3.

[0063] The heat storage unit comprises a hot water storage tank 7 , a hot water pump 12 , a cold water storage tank 8 , and a cold water pump 13 .

[0064] The gas storage unit comprises a gas storage reservoir 9, a gas storage reservoir inlet regulating valve 10, and a gas storage reservoir outlet regulating valve 11.

[0065] The integrated regulating power station comprises a compressed air flow line and a desalted water medium flow line.

[0066] The multiplexing motor group includes a multiplexing motor 6, a clutch 15, a first switch 18 and a second switch 17, and the multiplexing motor group is used for switching the operation mode of the power station.

[0067] The air turbine is connected to the multiplexing motor 6 through the clutch 15 , the multiplexing motor 6 is connected to the external 220 kV power grid 14 through the first switch 18 , and the multiplexing motor 6 is connected to the external 10 kV power grid 16 through the second switch 17 .

[0068] like Figure 1 , 2 As shown, the air flow line connection mode is: the compressor 1 is connected to the motor 5, the compressor 1 outlet is connected to the air inlet of the heat exchanger 2, the air outlet of the heat exchanger 2 is connected to the gas storage inlet regulating valve 10, the gas storage inlet regulating valve 10 is connected to the gas storage 9, the gas storage 9 is connected to the gas storage outlet regulating valve 11, the gas storage outlet regulating valve 11 is connected to the air inlet of the reheater 3, the reheater 3 air outlet is connected to the air turbine 4, the air turbine 4 is connected to the multiplexing motor 6 through the clutch 15, and the multiplexing motor 6 is connected to the external 220kV power grid 14 through the first switch 18. The multiplexing motor 6 is connected to the external 10kV power grid 16 through the second switch 17.

[0069] The water medium flow line connection mode is as follows: the cold water storage tank 8 is connected to the cold water pump 13, the cold water pump 13 is connected to the water side inlet of the heat exchanger 2, and the water side outlet of the heat exchanger 2 is connected to the hot water storage tank 7. The hot water storage tank 7 is connected to the hot water pump 12, the hot water pump 12 is connected to the water side inlet of the reheater 3, and the water side outlet of the reheater 3 is connected to the cold water storage tank 8.

[0070] like Figure 3 As shown, it is a schematic diagram of an integrated regulating power station operation method based on compressed air energy storage technology, and the system operation method includes phase adjustment conditions, energy storage and phase adjustment parallel conditions, and power generation conditions.

[0071] like Figure 2 and Figure 3As shown, in the phase-adjusting condition, the compressor 1 is in a stopped state, the air turbine 4 is also in a stopped working state, the gas storage reservoir inlet regulating valve 10 and the gas storage reservoir outlet regulating valve 11 are both in a closed state, the clutch 15 between the air turbine 4 and the multiplexing motor 6 is in a separated state, and the multiplexing motor 6 operates in a phase-adjusting state, and drives the multiplexing motor 6 to work by taking power from the external 220kV power grid 14, consuming less active power through the external 220kV power grid 14, and outputting greater reactive power. Reactive power is emitted through the excitation control system, and the excitation size is controlled to control the reactive power size.

[0072] like Figure 2 and Figure 3 As shown, the energy storage and phase adjustment are in parallel working condition. At this time, the air turbine 4 is in a stopped working state, and the gas storage outlet regulating valve 11 is closed. The compressor 1 is in a running state, and the gas storage inlet regulating valve 10 is open. The clutch 15 between the air turbine 4 and the multiplexing motor 6 is in a disengaged state, and the multiplexing motor 6 is running in a phase adjustment state. By taking power from the external 220kV power grid 14, the multiplexing motor 6 is driven to work, consuming less active power through the power grid and outputting more reactive power. Reactive power is emitted through the excitation control system, and the excitation size is controlled to control the reactive power size.

[0073] like Figure 1 and Figure 3 As shown, in the power generation condition, the compressor 1 is in a stopped state, the gas storage inlet regulating valve 10 is closed, the air turbine 4 is in a running state, the gas storage outlet regulating valve 11 is open, the clutch 15 between the air turbine 4 and the multiplexing motor 6 is in a coupled state, and the multiplexing motor 6 is running in a power generation state, generating power at full power. The hot water flow rate and the air flow rate are controlled by controlling the speed of the hot water pump 12 and the opening size of the gas storage outlet regulating valve 11, thereby controlling the output of active power. At the same time, a smaller reactive power is output through the excitation size of the excitation control system.

[0074] A method for switching between different modes of an integrated regulating power station based on compressed air energy storage technology:

[0075] In the method for switching from the phase-shifting operating condition to the power generation operating condition, the operating personnel receive a switching instruction and open the gas storage outlet regulating valve 11 to inject the high-pressure air in the gas storage 9 into the air turbine 4. Driven by the air, the speed of the air turbine 4 increases and increases to the rated speed; at the same time, the first switch 18 between the external 220kV power grid 14 and the reused motor 6 is kept in a closed state to modulate the reused motor 6 to a no-load state, and the clutch 15 is coupled to the external 220kV power grid 14 to achieve grid connection; thereafter, the active output of the reused motor 6 is gradually increased according to the system scheduling needs until the rated power generation power is reached.

[0076] In the method for switching the power generation condition to the phase adjustment condition, the operator receives the switching instruction and adjusts the opening of the gas storage outlet regulating valve 11 until the gas storage outlet regulating valve 11 is closed. By adjusting the opening of the gas storage outlet regulating valve 11, the amount of gas sent to the air turbine by the gas storage 9 is adjusted, the speed of the air turbine 4 is gradually reduced, and the load of the multiplexing motor 6 is reduced; the first switch 18 between the external 220kV power grid 14 and the multiplexing motor 6 is cut off, and the clutch 15 is separated; the second switch 17 between the external 10kV power grid 16 and the multiplexing motor 6 is closed, and the multiplexing motor 6 is powered by the external 10kV power grid 16 to drive the multiplexing motor 6 to work; after the multiplexing motor 6 reaches the conditions for the external 220kV power grid 14 to be connected to the grid, the second switch 17 is operated to open and the first switch 18 is operated in sequence to realize the multiplexing motor 6 being connected to the external 220kV power grid 14 and operating in the phase adjustment condition.

[0077] The method for switching the power generation mode to the energy storage and phase adjustment parallel mode is that the operator receives the switching instruction and adjusts the opening of the gas storage outlet regulating valve 11 until the gas storage outlet regulating valve 11 is closed. By adjusting the opening of the gas storage outlet regulating valve 11, the amount of gas sent to the air turbine by the gas storage 9 is adjusted, the speed of the air turbine 4 is gradually reduced, and the load of the multiplexing motor 6 is reduced; the first switch 18 between the external 220kV power grid 14 and the multiplexing motor 6 is cut off, and the clutch 15 is separated; the second switch 17 between the external 10kV power grid 16 and the multiplexing motor 6 is closed, and the multiplexing motor 6 is powered by the external 10kV power grid 16 to drive the multiplexing motor 6 to work; after the multiplexing motor 6 reaches the conditions for the external 220kV power grid 14 to be connected to the grid, the second switch 17 is operated to open and the first switch 18 is closed in sequence, so that the multiplexing motor 6 is connected to the external 220kV power grid 14 and operates in the phase adjustment mode. At the same time, the gas storage reservoir inlet regulating valve 10 is opened, and the compressor 2 is running to continuously inject high-pressure air into the gas storage reservoir 9.

[0078] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An integrated regulating power station based on compressed air energy storage technology, characterized in that: The power station comprises: a compressor unit, an expansion generator unit, a heat exchange unit, a heat storage unit, a gas storage unit and a multiplex generator unit; The compressor unit comprises a compressor and an electric motor, and the compressor unit is used for compressing air to store energy; The expansion generator set includes an air turbine, and the expansion generator set is used to generate electricity through the air turbine; The heat exchange unit includes a heat exchanger and a reheater, wherein the heat exchanger is used to cool the compressed air, and the reheater heats the compressed air for expansion and power generation; The heat storage unit includes a hot water storage tank, a hot water pump, a cold water storage tank, and a cold water pump, and the heat storage unit is used for cooling and heating the heat exchange unit; The gas storage unit comprises a gas storage reservoir, a gas storage reservoir inlet regulating valve, and a gas storage reservoir outlet regulating valve, and the gas storage unit is used to store compressed air; The multiplexing motor group includes a multiplexing motor, a clutch, a first switch and a second switch, and the multiplexing motor group is used for switching the operation mode of the power station; The air turbine is connected to the multiplexing motor through the clutch, the multiplexing motor is connected to the external 220kV power grid through the first switch, and the multiplexing motor is connected to the external 10kV power grid through the second switch; The power station operation modes include: a phase adjustment mode, an energy storage and phase adjustment parallel mode, and a power generation mode.

2. The integrated regulating power station according to claim 1, characterized in that: The compressor is connected to the motor, the compressor outlet is connected to the heat exchanger air inlet, the heat exchanger air outlet is connected to the gas storage inlet regulating valve, the gas storage inlet regulating valve is connected to the gas storage, the gas storage is connected to the gas storage outlet regulating valve, the gas storage outlet regulating valve is connected to the reheater air inlet, and the reheater air outlet is connected to the air turbine; The outlet of the cold water storage tank is connected to the cold water pump, the water outlet of the cold water pump is connected to the water side inlet of the heat exchanger, and the water side outlet of the heat exchanger is connected to the hot water storage tank; the water outlet of the hot water storage tank is connected to the hot water pump, the water outlet of the hot water pump is connected to the water side inlet of the reheater, and the water side outlet of the reheater is connected to the cold water storage tank.

3. The integrated regulating power station according to claim 2, characterized in that: The phase-adjusting operating mode includes: in the phase-adjusting operating mode, the compressor and the air turbine are in a stopped state, the gas storage inlet regulating valve and the gas storage outlet regulating valve are both in a closed state, the clutch between the air turbine and the multiplexing motor is in a disengaged state, and the multiplexing motor operates in a phase-adjusting state; the multiplexing motor drives the multiplexing motor to work by drawing power from the power grid, controls the excitation size and thus controls the reactive power size.

4. The integrated regulating power station according to claim 2, characterized in that: The energy storage and phase adjustment parallel operating mode includes: in the energy storage plus phase adjustment operating mode, the air turbine is in a stopped working state, the gas storage reservoir outlet regulating valve is closed, the compressor is in an operating state, the gas storage reservoir inlet regulating valve is open, the clutch between the air turbine and the multiplexing motor is in a disengaged state, and the multiplexing motor operates in a phase adjustment state.

5. The integrated regulating power station according to claim 4, characterized in that: The energy storage and phase modulation parallel working mode includes: the multiplexing motor drives the multiplexing motor to work by taking power from the power grid, controlling the excitation size and thus controlling the reactive power size.

6. The integrated regulating power station according to claim 2, characterized in that: The power generation operating mode includes: in the power generation operating mode, the compressor is in a stopped state, the gas storage reservoir inlet regulating valve is closed, the air turbine is in an operating state, the gas storage reservoir outlet regulating valve is open, the clutch between the air turbine and the reuse motor is in a coupled state, and the reuse motor operates in a full-power power generation state.

7. The integrated regulating power station according to claim 6, characterized in that: The power generation mode includes: controlling the hot water flow by controlling the rotation speed of the hot water pump, controlling the air flow by controlling the opening size of the gas storage outlet regulating valve, and then controlling the output of active power; outputting a smaller reactive power by adjusting the excitation size of the excitation control system.

8. The integrated regulating power station according to claim 2, characterized in that: The method for switching the phase-shifting operating mode to the power generation operating mode includes: the operating personnel receives a switching instruction, opens the gas storage outlet regulating valve, and the compressed air in the gas storage flows into the air turbine. Driven by the compressed air, the speed of the air turbine gradually increases to the rated speed; at the same time, the first switch remains in a closed state, the reuse motor is adjusted to a no-load state, and the clutch is coupled to the external 220kV power grid for grid connection; then the active output of the reuse motor is gradually increased until the rated power generation power is reached.

9. The integrated regulating power station according to claim 2, characterized in that: The method for switching the power generation operating mode to the phase-shifting operating mode includes: the operating personnel receive a switching instruction and gradually reduce the opening of the gas storage outlet regulating valve until the gas storage outlet regulating valve is closed; the amount of gas sent to the air turbine from the gas storage is reduced by reducing the opening of the gas storage outlet regulating valve, the speed of the air turbine is gradually reduced, and the load of the multiplexing motor is reduced; the first switch between the external 220kV power grid and the multiplexing motor is cut off, and the clutch is separated; the second switch between the external 10kV power grid and the multiplexing motor is closed, and the multiplexing motor draws power from the external 10kV power grid to drive the multiplexing motor to work; after the multiplexing motor reaches the conditions for re-connection to the external 220kV power grid, the second switch is disconnected, and the first switch is closed again to realize the multiplexing motor being connected to the external 220kV power grid and entering the phase-shifting operating condition.

10. The integrated regulating power station according to claim 2, characterized in that: The method for switching the power generation mode to the energy storage and phase adjustment parallel mode includes: the operating personnel receive a switching instruction, gradually reduce the opening of the gas storage outlet regulating valve until the gas storage outlet regulating valve is closed, and reduce the amount of gas sent to the air turbine by the gas storage by reducing the opening of the gas storage outlet regulating valve, the air turbine speed gradually decreases, and the load of the multiplexing motor decreases; the first switch between the external 220kV power grid and the multiplexing motor is cut off, and the clutch is separated; the second switch between the external 10kV power grid and the multiplexing motor is closed, and the multiplexing motor draws power from the external 10kV power grid to drive the multiplexing motor to work; after the multiplexing motor reaches the conditions for re-connection to the external 220kV power grid, the second switch is disconnected, and the first switch is closed to realize the multiplexing motor being connected to the external 220kV power grid and operating in the phase adjustment condition; at the same time, the gas storage inlet regulating valve is opened, the compressor is running, and high-pressure air is injected into the gas storage.

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