A compressed air energy storage compensation system and method

Abstract

This invention discloses a compressed air energy storage compensation system and method. The compensation system includes: a first energy conversion module, a speed regulation module, a second energy conversion module, a compressed air energy storage module, and a data acquisition and control module. The first energy conversion module converts first energy into second energy, which is then transmitted to the second energy conversion module via the speed regulation module. The second energy conversion module converts the second energy into electrical energy and transmits it to the power load via a transmission line. The data acquisition and control module controls the connection between the first energy conversion module and the first mechanical end of the speed regulation module when the average value of the first energy over a set time exceeds a set parameter value, and controls the separation of the compressed air energy storage module from the first mechanical end of the speed regulation module. Simultaneously, it controls the compressed air energy storage module to absorb electrical energy from the transmission line. This invention can reduce the adverse effects of new energy fluctuations and improve the instability of new energy power generation.

Description

Technical Field

[0001] This invention relates to the field of power technology, and in particular to a compressed air energy storage compensation system and method. Background Technology

[0002] The installed capacity of power generation systems dominated by traditional thermal power is gradually decreasing, while a new type of power system based on new energy sources is rapidly taking shape. The power system is gradually forming a multi-type, multi-form power generation system where thermal power and new energy coexist. However, new energy power generation methods have drawbacks; their energy input is unstable, exhibiting randomness and intermittency. Especially when energy input is low, it leads to intermittent and unstable power output from the power generation system. Fluctuations in energy input can even cause frequency instability in the power system. Summary of the Invention

[0003] This invention provides a compressed air energy storage compensation system and method, which can reduce the adverse effects of new energy fluctuations and improve the problem of unstable new energy power generation.

[0004] According to one aspect of the present invention, a compressed air energy storage compensation system is provided, the compressed air energy storage compensation system comprising: a first energy conversion module, a speed regulation module, a second energy conversion module, a compressed air energy storage module, and a data acquisition and control module;

[0005] The first energy conversion module is detachably connected to the first mechanical end of the speed regulation module, and the second mechanical end of the speed regulation module is connected to the mechanical end of the second energy conversion module. The first energy conversion module is used to acquire first energy, convert the first energy into second energy, and then send the second energy to the second energy conversion module through the speed regulation module.

[0006] The output of the second energy conversion module is connected to the power load through a transmission line. The second energy conversion module is used to convert the second energy into electrical energy and transmit the electrical energy to the power load through the transmission line.

[0007] The acquisition and control module is connected to the first energy conversion module, the speed regulation module, and the compressed air energy storage module. The compressed air energy storage module is connected to the second energy conversion module. The acquisition and control module is used to control the first energy conversion module to connect to the first mechanical end of the speed regulation module and control the compressed air energy storage module to disconnect from the first mechanical end of the speed regulation module when the average value of the first energy over a set time is greater than a set parameter value, and simultaneously control the compressed air energy storage module to absorb electrical energy from the transmission line. When the average value of the first energy over a set time is less than the set parameter value, the module controls the first energy conversion module to disconnect from the first mechanical end of the speed regulation module and controls the compressed air energy storage module to connect to the first mechanical end of the speed regulation module, so that the compressed air energy storage module sends third energy to the speed regulation module, and simultaneously controls the compressed air energy storage module to release electrical energy to the second energy conversion module.

[0008] Optionally, the second energy conversion module includes an electrical energy conversion unit and a first converter;

[0009] The power conversion unit is connected to the second mechanical end of the speed regulation module and the first converter, and the power conversion unit is used to convert the second energy into electrical energy;

[0010] The first converter is connected to the transmission line and is used to convert the first current in the electrical energy into a second current and then send it to the transmission line.

[0011] Optionally, the acquisition and control module is connected to the transmission line, and the acquisition and control module is used to acquire electrical signals in the transmission line, wherein the electrical signals include voltage, second current and frequency;

[0012] The acquisition and control module is used to control the compressed air energy storage module to be in a first frequency compensation state when the frequency in the electrical signal is greater than the frequency reference value, wherein the compressed air energy storage module absorbs electrical energy from the transmission line when it is in the first frequency compensation state.

[0013] The acquisition and control module is further configured to control the compressed air energy storage module to be in a second frequency compensation state when the frequency in the electrical signal is less than the frequency reference value, wherein, when the compressed air energy storage module is in the second frequency compensation state, the compressed air energy storage module releases electrical energy to the second energy conversion module. Optionally, the acquisition and control module is configured to control the compressed air energy storage module to be in a backup power compensation state when the voltage or second current in the transmission line is zero, wherein, when the compressed air energy storage module is in the backup power compensation state, the compressed air energy storage module releases electrical energy to the second energy conversion module.

[0014] Optionally, the compressed air energy storage module includes a compressor, an air storage unit, a turbine, a generator, and an energy storage converter unit;

[0015] The power transmission line, the compressor, the gas storage unit, the turbine, the generator, the energy storage converter unit, and the first converter are connected in sequence;

[0016] The generator can be detachably connected to the first mechanical end of the speed regulation module.

[0017] Optionally, the energy storage converter unit includes a second converter;

[0018] The second converter is connected to the generator and the first converter.

[0019] Optionally, the first energy conversion module includes a wind turbine unit;

[0020] The wind turbine unit can be detachably connected to the first mechanical end of the speed regulation module.

[0021] Optionally, the acquisition and control module includes a wind speed acquisition unit, a frequency acquisition unit, and a control unit;

[0022] The wind speed acquisition unit is connected to the control unit, and the wind speed acquisition unit is used to acquire wind speed and send the wind speed to the control unit;

[0023] The frequency acquisition unit is connected to the transmission line and the control unit, and the frequency acquisition unit is used to acquire the frequency in the transmission line;

[0024] The control unit is connected to the turbine and is used to control the start-up and shutdown of the turbine.

[0025] Optionally, the acquisition control module further includes a storage unit;

[0026] The storage unit is used to store the set parameter value and the frequency reference value.

[0027] According to another aspect of the present invention, a compressed air energy storage compensation method is provided, which is applied to the compressed air energy storage compensation system provided in any embodiment of the present invention;

[0028] The compressed air energy storage compensation method includes the following steps:

[0029] The first energy conversion module acquires first energy, converts the first energy into second energy, and then sends the second energy to the second energy conversion module through the speed regulation module;

[0030] The second energy conversion module converts the second energy into electrical energy and transmits the electrical energy to the power load through transmission lines;

[0031] When the average value of the first energy over a set time period is greater than a set parameter value, the acquisition and control module controls the first energy conversion module to connect with the first mechanical end of the speed regulation module, and controls the compressed air energy storage module to disconnect from the first mechanical end of the speed regulation module. Simultaneously, the compressed air energy storage module absorbs electrical energy from the transmission line. When the average value of the first energy over a set time period is less than the set parameter value, the module controls the first energy conversion module to disconnect from the first mechanical end of the speed regulation module, and controls the compressed air energy storage module to connect with the first mechanical end of the speed regulation module, causing the compressed air energy storage module to send third energy to the speed regulation module. Simultaneously, the module controls the compressed air energy storage module to release electrical energy to the second energy conversion module.

[0032] This embodiment provides a compressed air energy storage compensation system. The first energy conversion module in this system can collect first energy and convert it into second energy. It then sends the second energy to the second energy conversion module via a speed regulation module. The second energy conversion module can convert the second energy into electrical energy to supply the power load. The compressed air energy storage module can also send a third energy to the second energy conversion module via the speed regulation module. The second energy conversion module can also convert the third energy into electrical energy to supply the power load. When the average value of the first energy over a set time is greater than a set parameter value, it indicates that the first energy is relatively stable, and the electrical energy converted from the first energy can meet the normal operation of the power load. At this time, the acquisition and control module controls the connection between the first energy conversion module and the speed regulation module, while simultaneously controlling the separation of the compressed air energy storage module from the speed regulation module. The compressed air energy storage module can absorb excess electrical energy in the transmission line to ensure full utilization of electrical energy. When the average value of the first energy over a set time period is less than the set parameter value, it indicates that the first energy is unstable. The electrical energy converted from the first energy cannot meet the normal operation of the power load. At this time, the acquisition and control module controls the first energy conversion module to disconnect from the speed regulation module, and simultaneously controls the compressed air energy storage module to connect to the speed regulation module. The compressed air energy storage module sends third energy to the speed regulation module to ensure that the speed regulation module's speed remains constant, thereby ensuring that the second energy conversion module outputs stable electrical energy to enable the power load to operate normally. The compressed air energy storage compensation system provided in this embodiment can reduce the adverse effects of new energy fluctuations and improve the problem of unstable new energy power generation.

[0033] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a compressed air energy storage compensation system according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of another compressed air energy storage compensation system provided according to an embodiment of the present invention;

[0037] Figure 3This is a schematic diagram of the structure of another compressed air energy storage compensation system provided according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of another compressed air energy storage compensation system provided according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of another compressed air energy storage compensation system provided according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic flowchart of a compressed air energy storage compensation method according to an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Figure 1 This is a schematic diagram of a compressed air energy storage compensation system according to an embodiment of the present invention, with reference to... Figure 1The compressed air energy storage compensation system 100 provided in this embodiment includes: a first energy conversion module 110, a speed regulation module 120, a second energy conversion module 130, a compressed air energy storage module 140, and a data acquisition and control module 150; the first energy conversion module 110 is detachably connected to the first mechanical end of the speed regulation module 120, and the second mechanical end of the speed regulation module 120 is connected to the mechanical end of the second energy conversion module 130; the first energy conversion module 110 is used to acquire first energy, convert the first energy into second energy, and then send the second energy to the second energy conversion module 130 through the speed regulation module 120; the output end of the second energy conversion module 130 is connected to the power load 170 through a power transmission line 160, and the second energy conversion module 130 is used to convert the second energy into electrical energy and transmit the electrical energy to the power load 170 through the power transmission line 160; the data acquisition and control module 150 is connected to the first energy conversion module 110, the speed regulation module 120, the second energy conversion module 130, the compressed air energy storage module 140, and the data acquisition and control module 150. Module 120 is connected to compressed air energy storage module 140, and compressed air energy storage module 140 is connected to second energy conversion module 130. Acquisition and control module 150 is used to control first energy conversion module 110 to connect to first mechanical end of speed regulation module 120 and control compressed air energy storage module 140 to disconnect from first mechanical end of speed regulation module 120 when the average value of first energy over a set time is greater than the set parameter value, and simultaneously control compressed air energy storage module 140 to absorb electrical energy from transmission line 160. When the average value of first energy over a set time is less than the set parameter value, control first energy conversion module 110 to disconnect from first mechanical end of speed regulation module 120 and control compressed air energy storage module 140 to connect to first mechanical end of speed regulation module 120, so that compressed air energy storage module 140 sends third energy to speed regulation module 120, and simultaneously controls compressed air energy storage module 140 to release electrical energy to second energy conversion module 130.

[0044] Specifically, the first energy source can be a new energy source, specifically wind energy or hydropower; the second energy source can be mechanical energy. The first energy conversion module 110 can include a wind turbine unit. The first energy conversion module 110 can convert wind or hydropower into mechanical energy. The mechanical energy converted by the first energy conversion module 110 can be sent to the second energy conversion module 130 via the speed regulation module 120. The second energy conversion module 130 can convert the mechanical energy into electrical energy to supply the power load 170. The power load 170 can include a step-up transformer and other loads.

[0045] The speed regulation module 120 includes a first mechanical gear structure and a second mechanical gear structure. The first mechanical gear structure is detachably connected to the first energy conversion module 110. After the first energy conversion module 110 converts first energy into second energy, the second energy can cause the first mechanical gear structure to rotate. The rotation of the first mechanical gear structure drives the second mechanical gear structure to rotate. The second mechanical gear structure is connected to the second energy conversion module 130. The rotation of the second mechanical gear structure drives the second energy conversion module 130 to rotate, thereby generating electrical energy in the second energy conversion module 130. The rotational speed of the second mechanical gear structure is greater than that of the first mechanical gear structure.

[0046] When the average value of the first energy over a set time is less than the set parameter value, it indicates that the first energy is unstable and the electrical energy converted from the first energy cannot supply the power load 170 to operate normally. At this time, the acquisition and control module 150 controls the first energy conversion module 110 to separate from the speed regulation module 120, and connects the compressed air energy storage module 140 to the speed regulation module 120. The third energy provided by the compressed air energy storage module 140 to the speed regulation module 120 is mechanical energy. The third energy can maintain the speed of the first mechanical gear structure and the speed of the second mechanical gear structure in the speed regulation module 120 at the speed when the average value of the first energy over a set time is greater than the set parameter value. This ensures that when the first energy is unstable, the compressed air energy storage module 140 compensates for the speed of the speed regulation module 120, so that the electrical energy converted by the second energy conversion module 130 can still enable the power load 170 to operate normally. At the same time, the compressed air energy storage module 140 also releases electrical energy to the second energy conversion module 130.

[0047] When the average value of the first energy over a set time is greater than the set parameter value, it indicates that the first energy supply is stable. The electrical energy converted by the first energy conversion module 110, the speed regulation module 120 and the second energy conversion module 130 can meet the normal operation of the power load 170. At this time, the compressed air energy storage module 140 absorbs the excess electrical energy in the transmission line 160, and the compressed air energy storage module 140 is not connected to the speed regulation module 120.

[0048] This embodiment provides a compressed air energy storage compensation system. The first energy conversion module in this system can collect first energy and convert it into second energy. It then sends the second energy to the second energy conversion module via a speed regulation module. The second energy conversion module can convert the second energy into electrical energy to supply the power load. The compressed air energy storage module can also send a third energy to the second energy conversion module via the speed regulation module. The second energy conversion module can also convert the third energy into electrical energy to supply the power load. When the average value of the first energy over a set time is greater than a set parameter value, it indicates that the first energy is relatively stable, and the electrical energy converted from the first energy can meet the normal operation of the power load. At this time, the acquisition and control module controls the connection between the first energy conversion module and the speed regulation module, while simultaneously controlling the separation of the compressed air energy storage module from the speed regulation module. The compressed air energy storage module can absorb excess electrical energy in the transmission line to ensure full utilization of electrical energy. When the average value of the first energy over a set time period is less than the set parameter value, it indicates that the first energy is unstable. The electrical energy converted from the first energy cannot meet the normal operation of the power load. At this time, the acquisition and control module controls the first energy conversion module to disconnect from the speed regulation module, and simultaneously controls the compressed air energy storage module to connect to the speed regulation module. The compressed air energy storage module sends third energy to the speed regulation module to ensure that the speed regulation module's speed remains constant, thereby ensuring that the second energy conversion module outputs stable electrical energy to enable the power load to operate normally. The compressed air energy storage compensation system provided in this embodiment can reduce the adverse effects of new energy fluctuations and improve the problem of unstable new energy power generation.

[0049] Optional, Figure 2 This is a schematic diagram of another compressed air energy storage compensation system according to an embodiment of the present invention, with reference to... Figure 2 The second energy conversion module 130 includes an energy conversion unit 131 and a first converter 132. The energy conversion unit 131 is connected to the second mechanical end of the speed regulation module 120 and the first converter 132. The energy conversion unit 131 is used to convert the second energy into electrical energy. The first converter 132 is connected to the transmission line 160. The first converter 132 is used to convert the first current in the electrical energy into the second current and then send it to the transmission line 160.

[0050] Specifically, the power conversion unit 131 can receive a second energy source or a third energy source. The power conversion unit 131 may include a generator, which can convert the second energy source or the third energy source into electrical energy. The first converter 132 can be an AC-DC-AC converter, and the second current converted by the first converter 132 can be directly received by the power load 170.

[0051] Optional, Figure 3This is a schematic diagram of another compressed air energy storage compensation system according to an embodiment of the present invention, with reference to... Figure 3 The acquisition and control module 150 is connected to the transmission line 160. The acquisition and control module 150 is used to acquire electrical signals in the transmission line 160, wherein the electrical signals include voltage, second current, and frequency. The acquisition and control module 150 is used to control the compressed air energy storage module 140 to be in a first frequency compensation state when the frequency in the electrical signal is greater than the frequency reference value, wherein the compressed air energy storage module 140 absorbs electrical energy in the transmission line 160 when it is in the first frequency compensation state. The acquisition and control module 150 is also used to control the compressed air energy storage module 140 to be in a second frequency compensation state when the frequency in the electrical signal is less than the frequency reference value, wherein the compressed air energy storage module 140 releases electrical energy to the second energy conversion module 130 when it is in the second frequency compensation state.

[0052] Specifically, when the frequency is greater than the frequency reference value, it indicates that the electrical energy in transmission line 160 is greater than the electrical energy required by power load 170. In this case, the acquisition and control module 150 controls the compressed air energy storage module 140 to store the excess electrical energy, thus ensuring full utilization of the electrical energy. When the frequency is less than the frequency reference value, it indicates that the electrical energy in transmission line 160 is less than the electrical energy required by power load 170. In this case, the acquisition and control module 150 controls the compressed air energy storage module 140 to release electrical energy to ensure the power load can operate normally. When the frequency fluctuates around the reference frequency, it indicates frequency instability. The compressed air energy storage module 140 can also absorb or release electrical energy in a timely manner according to frequency changes to ensure the stability of electrical energy in transmission line 160. The compressed air energy storage module 140 can perform frequency compensation on transmission line 160 based on the relationship between the frequency in transmission line 160 and the frequency reference value to improve the frequency instability state of transmission line 160. Optional, continue to refer to... Figure 3 The acquisition and control module 150 is used to control the compressed air energy storage module 140 to be in a backup power compensation state when the voltage or the second current in the transmission line 160 is zero. When the compressed air energy storage module 140 is in the backup power compensation state, the compressed air energy storage module 140 releases electrical energy to the second energy conversion module 130.

[0053] Specifically, if the voltage or the second current in the transmission line 160 is zero, it indicates that at least one of the first energy conversion module 110 and the speed regulation module 120 has failed. At this time, the compressed air energy storage module 140 is in a backup power compensation state, that is, the compressed air energy storage module 140 can serve as an emergency backup power source to supply power to the second energy conversion module 130 in a timely manner to ensure that the power load 170 can work normally.

[0054] Optional,Figure 4 This is a schematic diagram of another compressed air energy storage compensation system according to an embodiment of the present invention, with reference to... Figure 4 The compressed air energy storage module 140 includes a compressor 141, an air storage unit 142, a turbine 143, a generator 144, and an energy storage converter unit 145; the power transmission line 160, the compressor 141, the air storage unit 142, the turbine 143, the generator 144, the energy storage converter unit 145, and the first converter 132 are connected in sequence; the generator 144 is detachably connected to the first mechanical end of the speed regulation module 120.

[0055] Specifically, the acquisition and control module 150 is connected to the compressor 141, the turbine 143, and the generator 144.

[0056] The acquisition and control module 150 controls the compressed air energy storage module 140 to absorb electrical energy. Specifically, the acquisition and control module 150 controls the compressor 141 to absorb electrical energy from the transmission line 160. The compressor 141 compresses the outside air, and the air storage unit 142 stores the compressed air.

[0057] When the acquisition and control module 150 controls the compressed air energy storage module 140 to release electrical energy, the compressed air energy storage module 140 works as follows: the air storage unit 142 releases compressed air to the turbine 143, the turbine 143 drives the generator 144 and the first mechanical gear structure in the speed regulation module 120 to rotate, and the rotation of the generator 144 will also convert mechanical energy into electrical energy and send it to the first converter 132, thereby realizing the release of electrical energy.

[0058] Optionally, the energy storage converter unit includes a second converter; the second converter is connected to the generator and the first converter.

[0059] Specifically, the second converter can convert the current generated by the generator into a current that the first converter can receive.

[0060] Optionally, the first energy conversion module includes a wind turbine unit; the wind turbine unit can be detachably connected to the first mechanical end of the speed regulation module.

[0061] Specifically, wind energy can drive the wind turbine unit to rotate, thereby enabling the wind turbine unit to convert wind energy into mechanical energy.

[0062] Optional, Figure 5 This is a schematic diagram of another compressed air energy storage compensation system according to an embodiment of the present invention, with reference to... Figure 5The data acquisition and control module 150 includes a wind speed acquisition unit 151, a frequency acquisition unit 152, and a control unit 153. The wind speed acquisition unit 151 is connected to the control unit 153 and is used to acquire wind speed and send it to the control unit 153. The frequency acquisition unit 152 is connected to the power transmission line 160 and the control unit 153 and is used to acquire the frequency in the power transmission line 160. The control unit 153 is connected to the turbine 143 and is used to control the start and stop of the turbine.

[0063] Specifically, the wind speed acquisition unit 151 sends the acquired wind speed to the control unit 153. When the control unit 153 determines that the wind speed for a set duration is greater than the set parameter value, the first energy conversion module 110, the speed regulation module 120, and the second energy conversion module 130 are connected in sequence. The second energy conversion module 130 outputs stable electrical energy to the transmission line 160. At the same time, the compressed air energy storage module 140 absorbs the electrical energy in the transmission line 160 and stores the absorbed electrical energy in the form of compressed air. When the control unit 153 determines that the wind speed is too low to make the speed regulation module 120 rotate or that the second mechanical gear structure in the speed regulation module 120 rotates too slowly, the control unit 153 controls the generator 141 to connect to the first mechanical end of the speed regulation module 120 and controls the turbine 143 to rotate, thereby driving the speed regulation module 120 to rotate and increasing the speed of the speed regulation module 120. At the same time, the electrical energy generated by the generator 144 is also compensated to the DC side of the first converter 132 through the energy storage converter unit 145, realizing the release of electrical energy.

[0064] Optionally, the acquisition and control module also includes a storage unit; the storage unit is used to store the set parameter values ​​and frequency reference values.

[0065] Specifically, the storage unit is connected to the control unit, which is used to obtain the set parameter values ​​and frequency reference values ​​from the storage unit.

[0066] This embodiment also provides a compressed air energy storage compensation method, which can be applied to the compressed air energy storage compensation system provided in any embodiment of the present invention;

[0067] Figure 6 This is a flowchart illustrating a compressed air energy storage compensation method according to an embodiment of the present invention. (Refer to...) Figure 6 The compressed air energy storage compensation method provided in this embodiment includes the following steps:

[0068] S110, the first energy conversion module acquires the first energy, converts the first energy into the second energy, and then sends the second energy to the second energy conversion module through the speed regulation module.

[0069] S120, the second energy conversion module converts the second energy into electrical energy and transmits the electrical energy to the power load through the transmission line.

[0070] S130: When the average value of the first energy over a set time is greater than the set parameter value, the acquisition and control module controls the first energy conversion module to connect with the first mechanical end of the speed regulation module, and controls the compressed air energy storage module to disconnect from the first mechanical end of the speed regulation module. At the same time, it controls the compressed air energy storage module to absorb electrical energy from the transmission line. When the average value of the first energy over a set time is less than the set parameter value, it controls the first energy conversion module to disconnect from the first mechanical end of the speed regulation module, and controls the compressed air energy storage module to connect with the first mechanical end of the speed regulation module, so that the compressed air energy storage module sends the third energy to the speed regulation module. At the same time, it controls the compressed air energy storage module to release electrical energy to the second energy conversion module.

[0071] The compressed air energy storage compensation method provided in this embodiment of the invention has corresponding beneficial effects with the compressed air energy storage compensation system provided in any embodiment of the invention. The technical details not covered in this embodiment are not detailed in the compressed air energy storage compensation system provided in any embodiment of the invention.

[0072] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0073] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A compressed air energy storage compensation system, characterized in that, include: The system comprises a first energy conversion module, a speed regulation module, a second energy conversion module, a compressed air energy storage module, and a data acquisition and control module. The first energy conversion module is detachably connected to the first mechanical end of the speed regulation module, and the second mechanical end of the speed regulation module is connected to the mechanical end of the second energy conversion module. The first energy conversion module is used to acquire first energy, convert the first energy into second energy, and then send the second energy to the second energy conversion module through the speed regulation module. The output of the second energy conversion module is connected to the power load through a transmission line. The second energy conversion module is used to convert the second energy into electrical energy and transmit the electrical energy to the power load through the transmission line. The acquisition and control module is connected to the first energy conversion module, the speed regulation module, and the compressed air energy storage module. The compressed air energy storage module is connected to the second energy conversion module. The acquisition and control module is used to control the first energy conversion module to connect to the first mechanical end of the speed regulation module and control the compressed air energy storage module to disconnect from the first mechanical end of the speed regulation module when the average value of the first energy over a set time is greater than a set parameter value, and simultaneously control the compressed air energy storage module to absorb electrical energy from the transmission line. When the average value of the first energy over a set time is less than the set parameter value, the module controls the first energy conversion module to disconnect from the first mechanical end of the speed regulation module and controls the compressed air energy storage module to connect to the first mechanical end of the speed regulation module, so that the compressed air energy storage module sends third energy to the speed regulation module, and simultaneously controls the compressed air energy storage module to release electrical energy to the second energy conversion module.

2. The compressed air energy storage compensation system according to claim 1, characterized in that, The second energy conversion module includes an electrical energy conversion unit and a first converter; The power conversion unit is connected to the second mechanical end of the speed regulation module and the first converter, and the power conversion unit is used to convert the second energy into electrical energy; The first converter is connected to the transmission line and is used to convert the first current in the electrical energy into a second current and then send it to the transmission line.

3. The compressed air energy storage compensation system according to claim 1, characterized in that, The acquisition and control module is connected to the transmission line, and the acquisition and control module is used to acquire electrical signals in the transmission line, wherein the electrical signals include voltage, second current and frequency; The acquisition and control module is used to control the compressed air energy storage module to be in a first frequency compensation state when the frequency in the electrical signal is greater than the frequency reference value, wherein the compressed air energy storage module absorbs electrical energy from the transmission line when it is in the first frequency compensation state. The acquisition and control module is further configured to control the compressed air energy storage module to be in a second frequency compensation state when the frequency in the electrical signal is less than the frequency reference value, wherein when the compressed air energy storage module is in the second frequency compensation state, the compressed air energy storage module releases electrical energy to the second energy conversion module.

4. The compressed air energy storage compensation system according to claim 1, characterized in that, The acquisition and control module is used to control the compressed air energy storage module to be in a backup power compensation state when the voltage or the second current in the transmission line is zero. When the compressed air energy storage module is in the backup power compensation state, the compressed air energy storage module releases electrical energy to the second energy conversion module.

5. The compressed air energy storage compensation system according to claim 2, characterized in that, The compressed air energy storage module includes a compressor, an air storage unit, a turbine, a generator, and an energy storage converter unit; The power transmission line, the compressor, the gas storage unit, the turbine, the generator, the energy storage converter unit, and the first converter are connected in sequence; The generator can be detachably connected to the first mechanical end of the speed regulation module.

6. The compressed air energy storage compensation system according to claim 5, characterized in that, The energy storage converter unit includes a second converter; The second converter is connected to the generator and the first converter.

7. The compressed air energy storage compensation system according to claim 1, characterized in that, The first energy conversion module includes a wind turbine unit; The wind turbine unit can be detachably connected to the first mechanical end of the speed regulation module.

8. The compressed air energy storage compensation system according to claim 5, characterized in that, The data acquisition and control module includes a wind speed acquisition unit, a frequency acquisition unit, and a control unit; The wind speed acquisition unit is connected to the control unit, and the wind speed acquisition unit is used to acquire wind speed and send the wind speed to the control unit; The frequency acquisition unit is connected to the transmission line and the control unit, and the frequency acquisition unit is used to acquire the frequency in the transmission line; The control unit is connected to the turbine and is used to control the start-up and shutdown of the turbine.

9. The compressed air energy storage compensation system according to claim 3, characterized in that, The acquisition and control module also includes a storage unit; The storage unit is used to store the set parameter value and the frequency reference value.

10. A compressed air energy storage compensation method, characterized in that, Applied to the compressed air energy storage compensation system according to any one of claims 1-9; The compressed air energy storage compensation method includes the following steps: The first energy conversion module acquires first energy, converts the first energy into second energy, and then sends the second energy to the second energy conversion module through the speed regulation module; The second energy conversion module converts the second energy into electrical energy and transmits the electrical energy to the power load through transmission lines; When the average value of the first energy over a set time period is greater than a set parameter value, the acquisition and control module controls the first energy conversion module to connect with the first mechanical end of the speed regulation module, and controls the compressed air energy storage module to disconnect from the first mechanical end of the speed regulation module. Simultaneously, the compressed air energy storage module absorbs electrical energy from the transmission line. When the average value of the first energy over a set time period is less than the set parameter value, the module controls the first energy conversion module to disconnect from the first mechanical end of the speed regulation module, and controls the compressed air energy storage module to connect with the first mechanical end of the speed regulation module, causing the compressed air energy storage module to send third energy to the speed regulation module. Simultaneously, the module controls the compressed air energy storage module to release electrical energy to the second energy conversion module.

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