Online measurement device and system for performance test of compressed air energy storage system

Abstract

The invention belongs to the technical field of compressed air energy storage performance monitoring, and particularly relates to a performance test online measurement device and system for a compressed air energy storage system, and the device comprises a compression side performance test monitoring module which is used for monitoring and recording parameters in the operation process of a compressor, and transmitting the monitoring data to a data processing display module; the energy storage stage performance test monitoring module is used for monitoring pressure change and temperature distribution parameters of the compressed air energy storage unit and transmitting the monitored data to the data processing display module; the expansion side performance test monitoring module is used for monitoring parameters of the expansion machine in the operation process and transmitting the monitoring data to the data processing display module; and the data processing and displaying module is used for processing the received data, calculating various performance indexes of the compressed air energy storage system in real time, and displaying the calculated performance indexes in the form of charts and curves in real time. The performance index of the compressed air energy storage system can be accurately measured and calculated, and the accuracy of the measurement result is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressed air energy storage performance monitoring, and in particular relates to an online measuring device and system for a performance test of a compressed air energy storage system. Background Art

[0002] With the advancement of science and technology and the transformation of energy structure, new energy storage technologies are developing rapidly and entering the fast lane. Behind this trend is the complementary advantages between new energy storage technologies and traditional energy storage technologies, which provides more diverse options for the construction of new power systems.

[0003] Among many new energy storage technologies, compressed air energy storage stands out with its unique advantages. As a large-scale, long-term, intermittent physical energy storage technology, compressed air energy storage has shown significant characteristics such as flexible site selection, short construction period, fast and flexible response, and diversified application scenarios compared to traditional pumped storage technology. These characteristics enable compressed air energy storage and pumped storage to complement each other, effectively deal with the strong randomness and high volatility problems brought about by the access of new energy to the power system, and provide strong support for the stable operation of the power system.

[0004] However, despite the many advantages of compressed air energy storage technology, the calculation of its performance and efficiency currently faces certain challenges. Specifically, traditional performance evaluation methods often rely on offline measurement and data analysis, which is not only time-consuming and labor-intensive, but also unable to reflect the operating status and performance changes of the system in real time. In addition, due to the complexity and variability of compressed air energy storage systems, offline measurement data often cannot fully and accurately reflect the actual performance of the system. Summary of the invention

[0005] In order to solve the problem of online monitoring of the performance and efficiency of a compressed air energy storage system, the present invention provides an online measurement device and system for a performance test of a compressed air energy storage system.

[0006] In a first aspect, the technical solution of the present invention provides an online measurement device for a performance test of a compressed air energy storage system, wherein the compressed air energy storage system comprises a compressor, a compressed air energy storage unit and an expander connected in sequence; the device comprises a data processing and display module and a compression side performance test monitoring module connected to the data processing and display module and arranged at the compressor position, an energy storage stage performance test monitoring module arranged at the compressed air energy storage unit and an expansion side performance test monitoring module arranged at the expander position; The compression side performance test monitoring module monitors and records the parameters during the operation of the compressor and transmits the monitoring data to the data processing and display module; The energy storage stage performance test monitoring module monitors the pressure change and temperature distribution parameters of the compressed air energy storage unit and transmits the monitoring data to the data processing and display module; The expansion side performance test monitoring module monitors the parameters of the expander during operation and transmits the monitoring data to the data processing and display module; The data processing and display module processes the received data, calculates various performance indicators of the compressed air energy storage system in real time, and displays the calculated performance indicators in real time in the form of charts and curves.

[0007] As a preferred embodiment of the technical solution of the present invention, the compression side performance test monitoring module includes a first temperature sensor, a second temperature sensor, a first pressure sensor and a second pressure sensor; A first temperature sensor, used to monitor the compressor inlet air temperature; A second temperature sensor is used to monitor the compressor outlet air temperature; A first pressure sensor for monitoring the compressor inlet air pressure; The second pressure sensor is used to monitor the compressor outlet air pressure.

[0008] As a preferred embodiment of the technical solution of the present invention, the data processing and display module calculates the theoretical compressor outlet air temperature based on the compressor inlet air temperature, the compressor inlet air pressure, the compressor outlet air pressure, the air adiabatic index and the compressor parameters, and calculates the difference between the theoretical compressor outlet air temperature and the monitored compressor outlet air temperature; when the difference is within a set range, the theoretical compressor power consumption is calculated based on the compressor inlet air temperature, the compressor inlet air pressure, the compressor outlet air pressure and the air heat capacity ratio in combination with the compressor parameters.

[0009] As a preferred embodiment of the technical solution of the present invention, the compression side performance test monitoring module further includes a first flow sensor and a first counter; A first flow sensor, used for monitoring the exhaust flow of the compressor; A first counter, used to record the running time of the compressor; The data processing and display module is used to calculate the total input power of the compression energy storage stage according to the exhaust flow rate of the compressor and the outlet air pressure of the compressor, and calculate the total input energy of the compression energy storage stage based on the total input power of the compression energy storage stage combined with the running time of the compressor.

[0010] As a preferred embodiment of the technical solution of the present invention, the compressed air energy storage unit is provided with an air storage tank; The energy storage stage performance test monitoring module includes a fifth pressure sensor, a fifth temperature sensor, a humidity sensor, and a second flow sensor; The fifth pressure sensor monitors the pressure changes of the gas storage tank in real time; The fifth temperature sensor monitors the temperature of the air in the gas tank in real time; Humidity sensor, real-time monitoring of the humidity of the air in the gas tank; The second flow sensor monitors the flow of gas at the outlet of the gas storage tank in real time.

[0011] As a preferred embodiment of the technical solution of the present invention, the expansion side performance test monitoring module includes a third temperature sensor, a fourth temperature sensor, a third pressure sensor and a fourth pressure sensor; The third temperature sensor monitors the expander inlet air temperature in real time; The fourth temperature sensor monitors the expander outlet air temperature in real time; The third pressure sensor monitors the expander inlet air pressure in real time; The fourth pressure sensor monitors the air pressure at the expander outlet in real time.

[0012] As a preferred embodiment of the technical solution of the present invention, the data processing and display module calculates the theoretical expander outlet air temperature based on the expander inlet air temperature combined with the expansion ratio of the expander and the adiabatic index of the air, and calculates the difference between the theoretical expander outlet air temperature and the monitored expander outlet air temperature. When the difference is within a set range, the output power of the theoretical expander is calculated based on the expander outlet air temperature, the expander inlet air pressure, the expander outlet air pressure and the air heat capacity ratio combined with the expander parameters.

[0013] As a preferred embodiment of the technical solution of the present invention, the expansion side performance test monitoring module also includes a power sensor and a second counter; Power sensor, used to measure the power generated by the turbine in real time; a second counter for recording the release time of the expander; The data processing and display module calculates the total energy output by the expander according to the power generation of the turbine and the release time of the expander; and calculates the system efficiency of the compressed air energy storage system based on the total energy output by the expander and the total input energy of the compression energy storage stage.

[0014] In a second aspect, the technical solution of the present invention provides an online measurement system for a performance test of a compressed air energy storage system, comprising a management server and an online measurement device as described in the first aspect; The data processing module is connected to the management server; The data processing module transmits the received raw data and the calculation results to the management server; The management server analyzes and calculates energy loss and thermal efficiency based on the received information, and evaluates the overall performance and stability of the compressed air energy storage system based on the analysis results.

[0015] As a preferred embodiment of the technical solution of the present invention, the management server compares the theoretical power consumption of the compressor with the actual total input power of the compression and energy storage stage to calculate the energy loss of the compressor; compares the theoretical output power of the expander with the measured power generation power of the turbine to calculate the energy loss of the expander; monitors the pressure change of the gas tank through the fifth pressure sensor to calculate the pressure loss; monitors the temperature change of the air in the gas tank through the fifth temperature sensor to calculate the temperature loss; monitors the humidity change of the air in the gas tank through the humidity sensor; and issues a fault alarm based on the set fault warning threshold.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: the present invention can monitor and record various parameters in the operation process of the compressed air energy storage system in real time, realize real-time performance calculation and display, and provide timely data support for system optimization and troubleshooting. The present invention can accurately measure and calculate the performance indicators of the compressed air energy storage system, and improve the accuracy and reliability of the measurement results. The present invention covers the three core components of the compressed air energy storage system: the compressor, the energy storage unit, and the expander, and realizes comprehensive monitoring and evaluation of the overall performance of the system. The present invention uses intuitive forms such as charts and curves to display performance indicators in real time, which is convenient for operators to understand and analyze system performance, and improves the operability and ease of use of the system. Through real-time performance monitoring and optimization, the present invention can reduce the operating cost of the compressed air energy storage system, improve energy utilization efficiency, and provide economic guarantees for the long-term stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of a device according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic connection block diagram of the monitoring device in an embodiment of the present invention.

[0020] Figure 3 is a schematic block diagram of a system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 should fall within the scope of protection of the present invention.

[0022] The compressed air energy storage system includes a compressor, a compressed air energy storage unit and an expander connected in sequence; the compressed air energy storage unit includes a high-temperature gas storage tank and a low-temperature gas storage tank; during the energy storage process, the compressor compresses the air to a high-temperature and high-pressure state through the coaxial drive of the electric motor. At this time, the high-temperature and high-pressure air is cooled by the cooler and stored in the gas storage. Here, the cooler is used as a cooling component. The heat exchange medium in the cooler exchanges heat with the high-temperature and high-pressure air. The heat exchange medium absorbs heat and is stored in the high-temperature gas storage tank. During the energy release process, the high-pressure air stored in the gas storage and cooled by the cooler exchanges heat with the high-temperature heat exchange medium in the heater. The cooled high-pressure air is heated to high-temperature and high-pressure air and enters the expander, driving the expander to work and drive the generator to generate electricity. The high-temperature heat exchange medium is stored in the low-temperature gas storage tank after heat exchange.

[0023] The embodiment of the present invention provides an online measuring device for the performance test of a compressed air energy storage system. It should be noted that, Figure 1 As shown, the compressed air energy storage system includes a compressor, a compressed air energy storage unit and an expander connected in sequence; the compressed air energy storage unit includes a high-temperature gas tank and a low-temperature gas tank; during the energy storage process, the compressor compresses the air to a high-temperature and high-pressure state through the coaxial drive of the electric motor. At this time, the high-temperature and high-pressure air is cooled by the cooler and stored in the gas storage reservoir. Here, the cooler is used as a cooling component, and the heat exchange medium in the cooler exchanges heat with the high-temperature and high-pressure air. The heat exchange medium absorbs heat and is stored in the high-temperature gas storage tank. During the energy release process, the high-pressure air stored in the gas storage reservoir and cooled by the cooler exchanges heat with the high-temperature and high-pressure air in the heater. The cooled high-pressure air is heated to become high-temperature and high-pressure air and enters the expander, driving the expander to work and drive the generator to generate electricity. The high-temperature heat exchange medium is stored in the low-temperature gas storage tank after heat exchange. As shown Figure 1 and Figure 2 As shown, the device includes a data processing and display module and a compression side performance test monitoring module connected to the data processing and display module and arranged at the compressor position, an energy storage stage performance test monitoring module arranged at the compressed air energy storage unit, and an expansion side performance test monitoring module arranged at the expander position; The compression side performance test monitoring module monitors and records the parameters during the operation of the compressor and transmits the monitoring data to the data processing and display module; The energy storage stage performance test monitoring module monitors the pressure change and temperature distribution parameters of the compressed air energy storage unit and transmits the monitoring data to the data processing and display module; The expansion side performance test monitoring module monitors the parameters of the expander during operation and transmits the monitoring data to the data processing and display module; The data processing and display module processes the received data, calculates various performance indicators of the compressed air energy storage system in real time, and displays the calculated performance indicators in real time in the form of charts and curves.

[0024] In the embodiment of the present invention, the compression side performance test monitoring module includes a first temperature sensor, a second temperature sensor, a first pressure sensor, and a second pressure sensor; The first temperature sensor is used to monitor the compressor inlet air temperature ; The second temperature sensor is used to monitor the compressor outlet air temperature ; The first pressure sensor is used to monitor the compressor inlet air pressure ; The second pressure sensor is used to monitor the compressor outlet air pressure .

[0025] Data processing and display module, based on the compressor inlet air temperature , Compressor inlet air pressure , compressor outlet air pressure , the air adiabatic index K and the compressor parameters to calculate the theoretical compressor outlet air temperature , and calculate the difference between the theoretical compressor outlet air temperature and the monitored compressor outlet air temperature; when the difference is within the set range, calculate the theoretical compressor power consumption according to the compressor inlet air temperature, compressor inlet air pressure, compressor outlet air pressure and air heat capacity ratio combined with the compressor parameters; The theoretical compressor outlet air temperature calculation model is as follows: ; The power consumption calculation model of the theoretical compressor is as follows:

[0026] In the formula, is the mass flow rate of air discharged from the compressor, which is determined by the model of the compressor. is the air heat capacity ratio, is the adiabatic efficiency of the compressor, is the compression ratio of the compressor. The compression ratio of the compressor can be calculated based on the compressor outlet air pressure. Compressor inlet air pressure Calculate the ratio of .

[0027] The compression side performance test monitoring module also includes a first flow sensor and a first counter; A first flow sensor, used for monitoring the exhaust flow of the compressor; A first counter, used to record the running time of the compressor; The data processing and display module is used to calculate the total input power of the compression energy storage stage according to the exhaust flow rate of the compressor and the outlet air pressure of the compressor. , the total input energy E of the compression energy storage stage is calculated based on the total input power of the compression energy storage stage combined with the running time of the compressor;

[0028]

[0029] Where Q is the exhaust flow rate of the compressor, is the compressor operating time.

[0030] The compressed air energy storage unit is provided with an air storage tank; The energy storage stage performance test monitoring module includes a fifth pressure sensor, a fifth temperature sensor, a humidity sensor, and a second flow sensor; The fifth pressure sensor monitors the pressure changes of the gas storage tank in real time; The fifth temperature sensor monitors the temperature of the air in the gas tank in real time; Humidity sensor, real-time monitoring of the humidity of the air in the gas tank; The second flow sensor monitors the flow of gas at the outlet of the gas storage tank in real time.

[0031] In the embodiment of the present invention, the expansion side performance test monitoring module includes a third temperature sensor, a fourth temperature sensor, a third pressure sensor and a fourth pressure sensor; The third temperature sensor monitors the expander inlet air temperature in real time ; The fourth temperature sensor monitors the expander outlet air temperature in real time ; The third pressure sensor monitors the expander inlet air pressure in real time ; The fourth pressure sensor monitors the air pressure at the expander outlet in real time .

[0032] Accordingly, the data processing and display module calculates the expansion ratio of the expander according to the expander inlet air temperature. The theoretical expander outlet air temperature is calculated by the adiabatic index of the air , and calculate the difference between the theoretical expander outlet air temperature and the monitored expander outlet air temperature. When the difference is within the set range, the output power of the theoretical expander is calculated based on the expander outlet air temperature, the expander inlet air pressure, the expander outlet air pressure and the air heat capacity ratio in combination with the expander parameters.

[0033]

[0034]

[0035] In the formula, is the mass flow rate of air discharged from the expander, which is determined by the model of the expander; The expansion side performance test monitoring module also includes a power sensor and a second counter; Power sensor, used to measure the power generated by the turbine in real time; a second counter for recording the release time of the expander; The data processing and display module calculates the total energy output by the expander according to the power generation of the turbine and the release time of the expander; and calculates the system efficiency of the compressed air energy storage system based on the total energy output by the expander and the total input energy of the compression energy storage stage.

[0036] like Figure 3 As shown, an embodiment of the present invention provides an online measurement system for a performance test of a compressed air energy storage system, including a management server and an online measurement device; the device includes a data processing and display module and a compression side performance test monitoring module connected to the data processing and display module and arranged at a compressor position, an energy storage stage performance test monitoring module arranged at a compressed air energy storage unit, and an expansion side performance test monitoring module arranged at an expander position; The compression side performance test monitoring module monitors and records the parameters during the operation of the compressor and transmits the monitoring data to the data processing and display module; The energy storage stage performance test monitoring module monitors the pressure change and temperature distribution parameters of the compressed air energy storage unit and transmits the monitoring data to the data processing and display module; The expansion side performance test monitoring module monitors the parameters of the expander during operation and transmits the monitoring data to the data processing and display module; The data processing and display module processes the received data, calculates various performance indicators of the compressed air energy storage system in real time, and displays the calculated performance indicators in real time in the form of charts and curves.

[0037] In the embodiment of the present invention, the compression side performance test monitoring module includes a first temperature sensor, a second temperature sensor, a first pressure sensor, and a second pressure sensor; The first temperature sensor is used to monitor the compressor inlet air temperature ; The second temperature sensor is used to monitor the compressor outlet air temperature ; The first pressure sensor is used to monitor the compressor inlet air pressure ; The second pressure sensor is used to monitor the compressor outlet air pressure .

[0038] Data processing and display module, based on the compressor inlet air temperature , Compressor inlet air pressure , compressor outlet air pressure , the air adiabatic index K and the compressor parameters to calculate the theoretical compressor outlet air temperature , and calculate the difference between the theoretical compressor outlet air temperature and the monitored compressor outlet air temperature; when the difference is within the set range, calculate the theoretical compressor power consumption according to the compressor inlet air temperature, compressor inlet air pressure, compressor outlet air pressure and air heat capacity ratio combined with the compressor parameters; The theoretical compressor outlet air temperature calculation model is as follows: ; The power consumption calculation model of the theoretical compressor is as follows:

[0039] In the formula, is the mass flow rate of air discharged from the compressor, which is determined by the model of the compressor. is the air heat capacity ratio, is the adiabatic efficiency of the compressor, is the compression ratio of the compressor. The compression ratio of the compressor can be calculated based on the compressor outlet air pressure. Compressor inlet air pressure Calculate the ratio of .

[0040] The compression side performance test monitoring module also includes a first flow sensor and a first counter; A first flow sensor, used for monitoring the exhaust flow of the compressor; A first counter, used to record the running time of the compressor; The data processing and display module is used to calculate the total input power of the compression energy storage stage according to the exhaust flow rate of the compressor and the outlet air pressure of the compressor. , the total input energy E of the compression energy storage stage is calculated based on the total input power of the compression energy storage stage combined with the running time of the compressor;

[0041]

[0042] Where Q is the exhaust flow rate of the compressor, is the compressor operating time.

[0043] The compressed air energy storage unit is provided with an air storage tank; The energy storage stage performance test monitoring module includes a fifth pressure sensor, a fifth temperature sensor, a humidity sensor, and a second flow sensor; The fifth pressure sensor monitors the pressure changes of the gas storage tank in real time; The fifth temperature sensor monitors the temperature of the air in the gas tank in real time; Humidity sensor, real-time monitoring of the humidity of the air in the gas tank; The second flow sensor monitors the flow of gas at the outlet of the gas storage tank in real time.

[0044] In the embodiment of the present invention, the expansion side performance test monitoring module includes a third temperature sensor, a fourth temperature sensor, a third pressure sensor and a fourth pressure sensor; The third temperature sensor monitors the expander inlet air temperature in real time ; The fourth temperature sensor monitors the expander outlet air temperature in real time ; The third pressure sensor monitors the expander inlet air pressure in real time ; The fourth pressure sensor monitors the air pressure at the expander outlet in real time .

[0045] Accordingly, the data processing and display module calculates the expansion ratio of the expander according to the expander inlet air temperature. The theoretical expander outlet air temperature is calculated by the adiabatic index of the air , and calculate the difference between the theoretical expander outlet air temperature and the monitored expander outlet air temperature. When the difference is within the set range, the output power of the theoretical expander is calculated based on the expander outlet air temperature, the expander inlet air pressure, the expander outlet air pressure and the air heat capacity ratio in combination with the expander parameters.

[0046]

[0047]

[0048] In the formula, is the mass flow rate of air discharged from the expander, which is determined by the model of the expander; The expansion side performance test monitoring module also includes a power sensor and a second counter; Power sensor, used to measure the power generated by the turbine in real time; a second counter for recording the release time of the expander; The data processing and display module calculates the total energy output by the expander according to the power generation of the turbine and the release time of the expander; and calculates the system efficiency of the compressed air energy storage system based on the total energy output by the expander and the total input energy of the compression energy storage stage.

[0049] The data processing module is connected to the management server; The data processing module transmits the received raw data and the calculation results to the management server; The management server analyzes and calculates energy loss and thermal efficiency based on the received information, and evaluates the overall performance and stability of the compressed air energy storage system based on the analysis results.

[0050] As a preferred embodiment of the technical solution of the present invention, the management server compares the theoretical power consumption of the compressor with the actual total input power of the compression and energy storage stage to calculate the energy loss of the compressor; compares the theoretical output power of the expander with the measured power generation power of the turbine to calculate the energy loss of the expander; monitors the pressure change of the gas tank through the fifth pressure sensor to calculate the pressure loss; monitors the temperature change of the air in the gas tank through the fifth temperature sensor to calculate the temperature loss; monitors the humidity change of the air in the gas tank through the humidity sensor; and issues a fault alarm based on the set fault warning threshold.

[0051] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0052] An embodiment of an online measurement system for a performance test of a compressed air energy storage system provided in an embodiment of the present invention belongs to the same inventive concept as the online measurement device for a performance test of a compressed air energy storage system in the above-mentioned embodiments. For details not fully described in the embodiment of the online measurement system for a performance test of a compressed air energy storage system, reference can be made to the embodiment of the online measurement device for a performance test of a compressed air energy storage system in the above-mentioned embodiments.

[0053] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. An online measuring device for a performance test of a compressed air energy storage system, wherein the compressed air energy storage system comprises a compressor, a compressed air energy storage unit and an expander connected in sequence; characterized in that: The device comprises a data processing and display module and a compression side performance test monitoring module connected to the data processing and display module and arranged at the compressor position, an energy storage stage performance test monitoring module arranged at the compressed air energy storage unit, and an expansion side performance test monitoring module arranged at the expander position; The compression side performance test monitoring module monitors and records the parameters during the operation of the compressor and transmits the monitoring data to the data processing and display module; The energy storage stage performance test monitoring module monitors the pressure change and temperature distribution parameters of the compressed air energy storage unit and transmits the monitoring data to the data processing and display module; The expansion side performance test monitoring module monitors the parameters of the expander during operation and transmits the monitoring data to the data processing and display module; The data processing and display module processes the received data, calculates various performance indicators of the compressed air energy storage system in real time, and displays the calculated performance indicators in real time in the form of charts and curves.

2. The performance test online measurement device of the compressed air energy storage system according to claim 1 is characterized in that: The compression side performance test monitoring module includes a first temperature sensor, a second temperature sensor, a first pressure sensor, and a second pressure sensor; A first temperature sensor, used to monitor the compressor inlet air temperature; A second temperature sensor is used to monitor the compressor outlet air temperature; A first pressure sensor for monitoring the compressor inlet air pressure; The second pressure sensor is used to monitor the compressor outlet air pressure.

3. The performance test online measurement device of the compressed air energy storage system according to claim 2 is characterized in that: The data processing and display module calculates the theoretical compressor outlet air temperature according to the compressor inlet air temperature, the compressor inlet air pressure, the compressor outlet air pressure, the air adiabatic index and the compressor parameters, and calculates the difference between the theoretical compressor outlet air temperature and the monitored compressor outlet air temperature; when the difference is within a set range, the theoretical compressor power consumption is calculated according to the compressor inlet air temperature, the compressor inlet air pressure, the compressor outlet air pressure and the air heat capacity ratio in combination with the compressor parameters.

4. The performance test online measurement device for the compressed air energy storage system according to claim 3 is characterized in that: The compression side performance test monitoring module also includes a first flow sensor and a first counter; A first flow sensor, used for monitoring the exhaust flow of the compressor; A first counter, used to record the running time of the compressor; The data processing and display module is used to calculate the total input power of the compression energy storage stage according to the exhaust flow rate of the compressor and the outlet air pressure of the compressor, and calculate the total input energy of the compression energy storage stage based on the total input power of the compression energy storage stage combined with the running time of the compressor.

5. The performance test online measurement device of the compressed air energy storage system according to any one of claims 1 to 4, characterized in that: The compressed air energy storage unit is provided with an air storage tank; The energy storage stage performance test monitoring module includes a fifth pressure sensor, a fifth temperature sensor, a humidity sensor, and a second flow sensor; The fifth pressure sensor monitors the pressure changes of the gas storage tank in real time; The fifth temperature sensor monitors the temperature of the air in the gas tank in real time; Humidity sensor, real-time monitoring of the humidity of the air in the gas tank; The second flow sensor monitors the flow of gas at the outlet of the gas storage tank in real time.

6. The performance test online measurement device for the compressed air energy storage system according to claim 5, characterized in that: The expansion side performance test monitoring module includes a third temperature sensor, a fourth temperature sensor, a third pressure sensor and a fourth pressure sensor; The third temperature sensor monitors the expander inlet air temperature in real time; The fourth temperature sensor monitors the expander outlet air temperature in real time; The third pressure sensor monitors the expander inlet air pressure in real time; The fourth pressure sensor monitors the air pressure at the expander outlet in real time.

7. The performance test online measurement device for the compressed air energy storage system according to claim 6, characterized in that: The data processing and display module calculates the theoretical expander outlet air temperature according to the expander inlet air temperature combined with the expander expansion ratio and the adiabatic index of the air, and calculates the difference between the theoretical expander outlet air temperature and the monitored expander outlet air temperature. When the difference is within a set range, the output power of the theoretical expander is calculated according to the expander outlet air temperature, the expander inlet air pressure, the expander outlet air pressure and the air heat capacity ratio combined with the expander parameters.

8. The performance test online measurement device for the compressed air energy storage system according to claim 7, characterized in that: The expansion side performance test monitoring module also includes a power sensor and a second counter; Power sensor, used to measure the power generated by the turbine in real time; a second counter for recording the release time of the expander; The data processing and display module calculates the total energy output by the expander according to the power generation of the turbine and the release time of the expander; and calculates the system efficiency of the compressed air energy storage system based on the total energy output by the expander and the total input energy of the compression energy storage stage.

9. A performance test online measurement system for a compressed air energy storage system, characterized in that: comprising a management server and a line measuring device as claimed in any one of claims 1 to 8; The data processing module is connected to the management server; The data processing module transmits the received raw data and the calculation results to the management server; The management server analyzes and calculates energy loss and thermal efficiency based on the received information, and evaluates the overall performance and stability of the compressed air energy storage system based on the analysis results.

10. The performance test online measurement system of the compressed air energy storage system according to claim 9, characterized in that: The management server compares the theoretical power consumption of the compressor with the actual total input power of the compression energy storage stage to calculate the energy loss of the compressor; compares the theoretical output power of the expander with the measured power generation power of the turbine to calculate the energy loss of the expander; monitors the pressure change of the gas storage tank through the fifth pressure sensor to calculate the pressure loss; The fifth temperature sensor is used to monitor the temperature change of the air in the gas tank and calculate the temperature loss; the humidity sensor is used to monitor the humidity change of the air in the gas tank; and a fault alarm is issued based on the set fault warning threshold.

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