Power generation system of vertical axis wind turbine and compressed air energy storage equipment all-in-one machine

Abstract

The invention relates to a power generation system of a vertical axis wind turbine and compressed air energy storage equipment integrated machine. The power generation system comprises a fan array, an air storage tank, an air electric heater set, an air turbine set, an electric heat storage system and a horizontal axis wind power plant. The fan array drives an air compressor to compress entering air through a vertical axis fan, so that the pressure of the air is increased, and the air is conveyed to an air mother pipe and is connected to an air storage tank; the air turbine unit is connected to the air storage tank and the electric heat storage system through the air electric heater unit; and the electric heat storage system consumes surplus electric power of the horizontal-axis wind power plant through electric heat storage. The small vertical axis wind turbine is adopted to directly drive the air compressor, multi-stage adiabatic compression is carried out on air, compressed air energy storage is carried out, electric heat storage is adopted to consume surplus electric power of the large wind power plant, the power supply reliability of the wind power plant is improved, and the compressed air energy storage efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of air energy storage technology, and in particular to a power generation system integrating a vertical axis wind turbine and a compressed air energy storage device. Background Art

[0002] There are many unpredictable factors in the production process of wind power generation. It is greatly affected by weather and wind speed, and production cannot be arranged according to the needs of the power grid. Therefore, wind energy is regarded as an unreliable source of electricity. Compressed air energy storage facilities can effectively utilize the extra electricity generated by wind power generation when power demand is low, and convert the stored energy into electrical energy when the wind is insufficient, thereby improving the reliability of wind power generation. However, the existing compressed air energy storage facilities focus more on the needs of the grid side in design and functionality, and most of them work independently from wind farms. With the rapid increase in the proportion of renewable energy in my country's power system, the power grid's demand for stability will increase. Self-storage at wind farms will ensure the reliability of power generation from the source. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a power generation system that integrates a vertical axis wind turbine and a compressed air energy storage device, which uses a small vertical axis wind turbine to directly drive an air compressor, performs multi-stage adiabatic compression on the air, performs compressed air energy storage, and uses electric heat storage to consume the surplus electricity of a large wind farm, so as to increase the power supply reliability of the wind farm and improve the efficiency of compressed air energy storage.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] The embodiment of the present application provides a power generation system of a vertical axis wind turbine and a compressed air energy storage device, including a wind turbine array, an air storage tank, an air electric heater group, an air turbine group, an electric heat storage system, and a horizontal axis wind farm;

[0006] The fan array drives the air compressor to compress the incoming air through the vertical axis fan, increase its pressure, and transmit it to the air main pipe to connect to the air storage tank;

[0007] The air turbine unit is connected to the air storage tank and the electric heat storage system through the air electric heater unit;

[0008] The electric heat storage system absorbs the surplus electricity of the horizontal axis wind farm through electric heat storage.

[0009] The fan array adopts three-stage compression, which includes a first-stage vertical axis wind air compressor array, a second-stage vertical axis wind air compressor array and a third-stage vertical axis wind air compressor array. The air turbine unit adopts two-stage expansion, including a high-pressure air turbine and a low-pressure air turbine. There are three air storage tanks, which include a first-stage air storage tank, a second-stage air storage tank and a third-stage air storage tank. There are two air electric heater groups, which include a high-pressure air electric heater and a low-pressure air electric heater.

[0010] The inlet of the first-level vertical axis wind air compressor array is connected to the atmosphere through the first-level air filter and the first-level inlet regulating valve / inlet three-way valve. The first-level vertical axis fan drives the first-level air compressor through the gear box to compress the incoming air, increase its pressure, and transmit it to the first-level air main pipe through the first-level outlet regulating valve / outlet three-way valve, and enter the first-level air storage tank through the first-level air storage tank inlet stop valve. The air of the first-level air main pipe is compressed by the second-level vertical axis wind air compressor and enters the second-level air main pipe, and can enter the second-level air storage tank through the second-level air storage tank inlet stop valve. The air of the second-level air main pipe is compressed by the third-level vertical axis wind air compressor and enters the third-level air main pipe. The air of the third-level air main pipe enters the third-level air storage tank through the third-level air storage tank inlet stop valve. The third-level air storage tank is connected to the inlet of the high-pressure air electric heater through the third-level air storage tank outlet regulating valve, the outlet of the high-pressure air electric heater is connected to the inlet of the high-pressure air turbine, the outlet of the high-pressure air turbine is connected to the low-pressure air turbine through the low-pressure air electric heater, and the air turbine drives the generator to be connected to the power grid.

[0011] The heat storage system includes an electric heater. The surplus electricity of the horizontal axis wind farm is connected to the electric heater through the power grid. The molten salt in the cold tank is heated by the electric heater through the first salt pump, and the electrical energy is converted into its own thermal energy and stored in the hot tank. The molten salt in the hot tank is heated by the high-pressure electric heater throttle valve and the low-pressure electric heater throttle valve through the second salt pump to heat the air in the high-pressure air electric heater and the low-pressure air electric heater.

[0012] The charging process is as follows: air sequentially enters the primary air filter, the primary inlet regulating valve / inlet three-way valve, the primary air compressor, the primary outlet regulating valve / outlet three-way valve, so that its pressure is increased and transmitted to the primary air main pipe, and can enter the primary air storage tank through the primary air storage tank inlet stop valve; the air in the primary air main pipe then sequentially enters the secondary inlet regulating valve / inlet three-way valve, the secondary air compressor, the secondary outlet regulating valve / outlet three-way valve, so that its pressure is increased and transmitted to the secondary air main pipe, and can enter the secondary air storage tank through the secondary air storage tank inlet stop valve; the air in the secondary air main pipe then sequentially enters the tertiary inlet regulating valve / inlet three-way valve, the tertiary air compressor, the tertiary outlet regulating valve / outlet three-way valve, so that its pressure is increased and transmitted to the tertiary air main pipe, and can enter the tertiary air storage tank through the tertiary air storage tank inlet stop valve;

[0013] The discharge process is to use the three-stage gas tank outlet regulating valve to control the gas discharge of the gas tank. The high-pressure air stored in the system enters the high-pressure air electric heater, high-pressure air turbine, low-pressure air electric heater, and low-pressure air turbine in turn to drive the generator to generate electricity.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: through the present invention, the excess electricity generated by wind power generation when the power demand is low can be effectively utilized, and the stored energy can be converted into electrical energy and released when the wind is insufficient, thereby improving the reliability of wind power generation, and by adopting electric heat storage to consume the surplus electricity of large wind farms, the power supply reliability of wind farms can be increased, and the efficiency of compressed air energy storage can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the system structure of this application. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0018] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0019] The terms "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and should not be understood as indicating or implying relative importance, nor should they be understood as requiring or implying any such actual relationship or order between these entities or operations.

[0020] like Figure 1As shown, a power generation system of a vertical axis wind turbine and a compressed air energy storage device, including a wind turbine array, an air storage tank, an air electric heater group, an air turbine group, an electric heat storage system, and a horizontal axis wind farm;

[0021] The fan array drives the air compressor to compress the incoming air through the vertical axis fan, increase its pressure, and transmit it to the air main pipe to connect to the air storage tank;

[0022] The air turbine unit is connected to the air storage tank and the electric heat storage system through the air electric heater unit;

[0023] The electric heat storage system absorbs the surplus electricity of the horizontal axis wind farm through electric heat storage.

[0024] The present application provides a fan array using three-stage compression, which are a first-stage vertical axis wind air compressor array 100, a second-stage vertical axis wind air compressor array 300 and a third-stage vertical axis wind air compressor array 500. The first-stage vertical axis wind air compressor array 100 includes a first-stage vertical axis fan 101, a first-stage gear box 102, a first-stage air compressor 103, a first-stage inlet regulating valve / inlet three-way valve 105, a first-stage outlet regulating valve / outlet three-way valve 104, and a first-stage air filter 106. The second-stage vertical axis wind air compressor array 300 includes a second-stage vertical axis fan 301, a second-stage gear box 302, a second-stage air compressor 303, a second-stage inlet regulating valve / inlet three-way valve 105, a first-stage outlet regulating valve / outlet three-way valve 104, and a first-stage air filter 106. Valve 305, secondary outlet regulating valve / outlet three-way valve 304, secondary air filter 306, the three-stage vertical axis wind power air compressor array 500 includes a three-stage vertical axis fan 501, three gear boxes 502, a three-stage air compressor 503, a three-stage inlet regulating valve / inlet three-way valve 505, a three-stage outlet regulating valve / outlet three-way valve 504, the air turbine unit adopts two-stage expansion, including a high-pressure air turbine 703 and a low-pressure air turbine 706, the air storage tank is set to three, namely the first-stage air storage tank 202, the second-stage air storage tank 402, and the third-stage air storage tank 602, and the air electric heater group is set to two, namely the high-pressure air electric heater 701 and the low-pressure air electric heater 705.

[0025] The inlet of the primary vertical axis wind air compressor array is connected to the atmosphere through the primary air filter 106 and the inlet regulating valve / inlet three-way valve 105. The primary vertical axis fan 101 drives the primary air compressor 103 through the primary gear box 102 to compress the incoming air, increase its pressure, and transmit it to the primary air main pipe 200 through the outlet regulating valve / outlet three-way valve 104, and can enter the primary air storage tank 202 through the primary air storage tank inlet stop valve 201. After being compressed by the secondary vertical axis wind air compressor, the air in the primary air main pipe 200 enters the secondary air main pipe 400, and can enter the secondary air storage tank through the secondary air storage tank inlet stop valve 401 The air of the secondary air main pipe 400 is compressed by the three-stage vertical axis wind power air compressor and then enters the three-stage air main pipe 600. The air of the three-stage air main pipe 600 enters the three-stage air storage tank 602 through the three-stage air storage tank inlet stop valve 601. The three-stage air storage tank 602 is connected to the inlet of the high-pressure air electric heater 701 through the three-stage air storage tank outlet regulating valve 603. The outlet of the high-pressure air electric heater 701 is connected to the inlet of the high-pressure air turbine 703. The outlet of the high-pressure air turbine 703 is connected to the low-pressure air turbine 706 through the low-pressure air electric heater 705. The low-pressure air turbine 706 drives the generator 707 to connect to the power grid 900.

[0026] The surplus electricity of the horizontal axis wind farm 1000 is connected to the electric heater 805 through the power grid 900. The molten salt in the cold tank 803 is heated by the electric heater 805 through the first salt pump 804, and the electrical energy is converted into its own thermal energy and stored in the hot tank 801. The molten salt in the hot tank 801 is heated by the high-pressure electric heater throttle valve 702 and the low-pressure electric heater throttle valve 704 through the second salt pump 806 to heat the air in the high-pressure air electric heater 701 and the low-pressure air electric heater 705.

[0027] During the charging process, air sequentially enters the primary air filter 106, the primary inlet regulating valve / inlet three-way valve 105, the primary air compressor 103, and the primary outlet regulating valve / outlet three-way valve 104, so that its pressure is increased and then transmitted to the primary air main pipe 200, and can enter the primary air storage tank 202 through the primary air storage tank inlet stop valve 201; the air in the primary air main pipe 200 then sequentially enters the secondary inlet regulating valve / inlet three-way valve 305, the secondary air compressor 303, the secondary outlet regulating valve / outlet three-way valve 104, and the secondary air main pipe 200. The air in the secondary air main pipe 400 then enters the tertiary inlet regulating valve / inlet three-way valve 505, the tertiary air compressor 504, and the tertiary outlet regulating valve / outlet three-way valve 503 in sequence to increase its pressure and be transported to the tertiary air main pipe 600, and enter the tertiary air tank 602 through the tertiary air tank inlet stop valve 601; the air in the secondary air main pipe 400 then enters the tertiary inlet regulating valve / inlet three-way valve 505, the tertiary air compressor 504, and the tertiary outlet regulating valve / outlet three-way valve 503 in sequence to increase its pressure and be transported to the tertiary air main pipe 600, and enter the tertiary air tank 602 through the tertiary air tank inlet stop valve 601;

[0028] During the discharge process, the three-stage gas tank outlet regulating valve 603 is used to control the gas discharge of the gas tank, and the high-pressure air stored in the system sequentially enters the high-pressure air electric heater 701, the high-pressure air turbine 703, the low-pressure air electric heater 705, and the low-pressure air turbine 706, driving the generator 707 to generate electricity.

[0029] In order to ensure that the system provides sufficient mechanical energy for compressed air energy storage, multiple parallel vertical wind air compression devices are set up at each level. The compressor outlet air of the vertical wind air compression device is sent to the air storage tank at the end of the main pipe of this level through the main pipe.

[0030] Due to the unevenness and unpredictability of wind force, the mechanical power required for each stage in the vertical wind air compression device array during actual operation is inconsistent with the design requirements. The present invention proposes to select some units in proportion in each stage of the vertical wind air compression device and connect them to the adjacent stage or other similar stages of air main pipes at the same time, so that the number of working vertical wind air compression devices in different compression stages in the system can be allocated as needed.

[0031] The main pipe and air storage tank have a certain air capacity, which can ensure that each stage of the air compressor has the ability to start independently and stabilize the working pressure of each stage of the air compressor.

[0032] The discharge of the air tank is controlled by the three-stage air tank outlet regulating valve, and the high-pressure air stored in the system drives the generator to generate electricity through the air turbine.

[0033] Electric heat storage is used to consume the surplus electricity of large wind farms to increase the reliability of wind farm power supply. The molten salt in the cold tank is heated by the electric heater driven by the pump, and the electrical energy is converted into its own heat energy and stored in the hot tank. When the power demand is at a peak, the molten salt in the hot tank is driven by the pump and passes through the air heater to heat the air turbine intake to improve the efficiency of compressed air energy storage.

[0034] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power generation system of a vertical axis wind turbine and a compressed air energy storage device, characterized in that: It includes a wind turbine array, a gas storage tank, an air electric heater unit, an air turbine unit, an electric heat storage system, and a horizontal axis wind farm; The fan array drives the air compressor to compress the incoming air through the vertical axis fan, increase its pressure, and transmit it to the air main pipe to connect to the air storage tank; The air turbine unit is connected to the air storage tank and the electric heat storage system through the air electric heater unit; The electric heat storage system absorbs the surplus electricity of the horizontal axis wind farm through electric heat storage.

2. A power generation system of a vertical axis wind turbine and a compressed air energy storage device as claimed in claim 1, characterized in that: The fan array adopts three-stage compression, which includes a first-stage vertical axis wind air compressor array, a second-stage vertical axis wind air compressor array and a third-stage vertical axis wind air compressor array. The air turbine unit adopts two-stage expansion, including a high-pressure air turbine and a low-pressure air turbine. There are three air storage tanks, which include a first-stage air storage tank, a second-stage air storage tank and a third-stage air storage tank. There are two air electric heater groups, which include a high-pressure air electric heater and a low-pressure air electric heater.

3. A power generation system of a vertical axis wind turbine and a compressed air energy storage device as claimed in claim 2, characterized in that: The inlet of the first-level vertical axis wind air compressor array is connected to the atmosphere through the first-level air filter and the first-level inlet regulating valve / inlet three-way valve. The first-level vertical axis fan drives the first-level air compressor through the gear box to compress the incoming air, increase its pressure, and transmit it to the first-level air main pipe through the first-level outlet regulating valve / outlet three-way valve, and enter the first-level air storage tank through the first-level air storage tank inlet stop valve. The air of the first-level air main pipe is compressed by the second-level vertical axis wind air compressor and enters the second-level air main pipe, and can enter the second-level air storage tank through the second-level air storage tank inlet stop valve. The air of the second-level air main pipe is compressed by the third-level vertical axis wind air compressor and enters the third-level air main pipe. The air of the third-level air main pipe enters the third-level air storage tank through the third-level air storage tank inlet stop valve. The third-level air storage tank is connected to the inlet of the high-pressure air electric heater through the third-level air storage tank outlet regulating valve, the outlet of the high-pressure air electric heater is connected to the inlet of the high-pressure air turbine, the outlet of the high-pressure air turbine is connected to the low-pressure air turbine through the low-pressure air electric heater, and the air turbine drives the generator to be connected to the power grid.

4. A power generation system of a vertical axis wind turbine and a compressed air energy storage device as claimed in claim 3, characterized in that: The heat storage system includes an electric heater. The surplus electricity of the horizontal axis wind farm is connected to the electric heater through the power grid. The molten salt in the cold tank is heated by the electric heater through the first salt pump, and the electrical energy is converted into its own thermal energy and stored in the hot tank. The molten salt in the hot tank is heated by the high-pressure electric heater throttle valve and the low-pressure electric heater throttle valve through the second salt pump to heat the air in the high-pressure air electric heater and the low-pressure air electric heater.

5. The power generation system of a vertical axis wind turbine and a compressed air energy storage device as claimed in claim 1, characterized in that: The charging process of the power generation system is that the air sequentially enters the primary air filter, the primary inlet regulating valve / inlet three-way valve, the primary air compressor, the primary outlet regulating valve / outlet three-way valve, so that the air pressure is increased, and is transmitted to the primary air main pipe, and can enter the primary air storage tank through the primary air storage tank inlet stop valve; the air of the primary air main pipe then sequentially enters the secondary inlet regulating valve / inlet three-way valve, the secondary air compressor, the secondary outlet regulating valve / outlet three-way valve, so that the air pressure is increased, and is transmitted to the secondary air main pipe, and can enter the secondary air storage tank through the secondary air storage tank inlet stop valve; the air of the secondary air main pipe then sequentially enters the tertiary inlet regulating valve / inlet three-way valve, the tertiary air compressor, the tertiary outlet regulating valve / outlet three-way valve, so that the air pressure is increased, and is transmitted to the tertiary air main pipe, and can enter the tertiary air storage tank through the tertiary air storage tank inlet stop valve; The discharge process is to use the three-stage gas tank outlet regulating valve to control the gas discharge of the gas tank. The high-pressure air stored in the system enters the high-pressure air electric heater, high-pressure air turbine, low-pressure air electric heater, and low-pressure air turbine in turn to drive the generator to generate electricity.

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