Test System and Method for Parameters of Air Turbine Model in Large Compressed Air Energy Storage Power Station

Abstract

This application relates to a parameter testing system and method for an air turbine model of a large-scale compressed air energy storage power station. The system includes an air turbine model functional module and a signal acquisition and generation device, as well as an actuator controller. The actuator controller is connected to the signal acquisition and generation device and receives the high-pressure intake valve signal output by the signal acquisition and generation device. The actuator controller is also connected to the air turbine model functional module. The generator power output from the air turbine model functional module is sent to the signal acquisition and generation device and connected thereto. The actuator controller outputs a high-pressure intake valve command and is connected to the high-pressure intake valve. Simultaneously, the actuator controller sends the high-pressure intake valve command to the signal acquisition and generation device and is connected thereto. This application enables the testing of air turbine model parameters of a large-scale compressed air energy storage power station to accurately reflect the characteristics of the air turbine, thus providing a fundamental guarantee for the stable operation of the power grid.

Description

Technical Field

[0001] This application relates to the field of air energy storage technology, specifically to a test system and method for air turbine model parameters of a large compressed air energy storage power station. Background Technology

[0002] For power systems, whether it is calculation and analysis, planning and operation, or control and protection, it must be based on accurate and reliable mathematical models. By testing the parameters of the unit models, accurate calculation data can be provided for system stability analysis and daily power grid production scheduling. This is an effective measure to ensure the safe operation of the power grid and has important social significance and economic benefits.

[0003] Compressed air energy storage (CASS), as a highly efficient and sustainable new energy storage method, boasts advantages such as large capacity and long service life, and has broad application prospects in renewable energy utilization and grid peak shaving. Therefore, research on the relevant characteristic parameters of CASS is of great significance. However, existing technologies lack testing methods for the air turbine model parameters of large-scale CASS power plants, and cannot accurately reflect the inherent characteristics of the air turbine in such plants. Therefore, research on testing methods for the air turbine model parameters of large-scale CASS power plants has significant practical implications. Summary of the Invention

[0004] The purpose of this application is to provide a testing system and method for air turbine model parameters of large compressed air energy storage power stations, so as to solve the technical problems such as the lack of testing for air turbine model parameters of large compressed air energy storage power stations and the inability to accurately reflect the inherent characteristics of air turbines in large compressed air energy storage power stations.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] In a first aspect, this application provides a parameter testing system for an air turbine model of a large compressed air energy storage power station. The testing system includes an air turbine model functional module and a signal acquisition and generation device. An actuator controller is connected to the signal acquisition and generation device and receives the high-pressure intake valve signal output by the signal acquisition and generation device. The actuator controller is connected to the air turbine model functional module. The generator power output by the air turbine model functional module is sent to the signal acquisition and generation device and connected to the signal acquisition and generation device. The actuator controller outputs a high-pressure intake valve command and is connected to the high-pressure intake valve. The actuator controller also sends the high-pressure intake valve command to the signal acquisition and generation device and is connected to the signal acquisition and generation device. Feedback from the high-pressure intake valve, the salt cavern outlet pressure, the high-pressure cylinder intake pressure, the high-pressure cylinder intake temperature, the high-pressure cylinder regulating stage pressure, the high-pressure cylinder exhaust pressure, the high-pressure cylinder exhaust temperature, the intermediate-pressure cylinder intake pressure, the intermediate-pressure cylinder intake temperature, the intermediate-pressure cylinder exhaust pressure, the intermediate-pressure cylinder exhaust temperature, the low-pressure cylinder intake pressure, the low-pressure cylinder intake temperature, the low-pressure cylinder exhaust pressure, the low-pressure cylinder exhaust temperature, and the generator power are sent to the signal acquisition and generation device and connected to the signal acquisition and generation device.

[0007] The high-pressure intake valve includes a high-pressure regulating valve and a high-pressure replenishing valve. The high-pressure regulating valve is used to regulate the intake volume of the air turbine under rated operating conditions, and the high-pressure replenishing valve is used to regulate the supplementary intake volume of the air turbine after it exceeds the rated operating conditions.

[0008] The high-pressure intake valve is connected to the high-pressure cylinder inlet heat exchanger via the high-pressure main air valve, and the high-pressure cylinder inlet heat exchanger is connected to the salt cavern outlet.

[0009] The high-pressure intake valve is connected to the high-pressure cylinder, the high-pressure cylinder outlet is connected to the intermediate-pressure cylinder inlet heat exchanger, the intermediate-pressure cylinder inlet heat exchanger outlet is connected to the intermediate-pressure main air valve, the intermediate-pressure main air valve is connected to the intermediate-pressure regulating valve, the intermediate-pressure regulating valve is connected to the intermediate-pressure cylinder, the intermediate-pressure cylinder outlet is connected to the low-pressure cylinder inlet heat exchanger, the low-pressure cylinder inlet heat exchanger outlet is connected to the low-pressure main air valve, the low-pressure main air valve is connected to the low-pressure cylinder, the low-pressure cylinder outlet is connected to the atmosphere, and the generator is connected to the low-pressure cylinder via a shaft.

[0010] Secondly, this application provides a method for testing the parameters of an air turbine model in a large compressed air energy storage power station, using the system described above. The testing method includes methods for testing the output coefficient of the high-pressure cylinder, the output coefficient of the intermediate-pressure cylinder, the output coefficient of the low-pressure cylinder, the volume-time test of the inlet heat exchanger of the high-pressure cylinder, the volume-time test of the front chamber of the high-pressure cylinder, the volume-time test of the high-pressure cylinder, the volume-time test of the inlet heat exchanger of the intermediate-pressure cylinder, the volume-time test of the intermediate cylinder, and the volume-time test of the inlet heat exchanger of the low-pressure cylinder.

[0011] The method for testing the output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder, and the output coefficient of the low-pressure cylinder is characterized by the following steps: (1) The electrical load of the air turbine is greater than 30% of the rated load, and stable operation is maintained; (2) The high-pressure cylinder inlet pressure, high-pressure cylinder inlet temperature, high-pressure cylinder exhaust pressure, high-pressure cylinder exhaust temperature, medium-pressure cylinder inlet pressure, medium-pressure cylinder inlet temperature, medium-pressure cylinder exhaust pressure, medium-pressure cylinder exhaust temperature, low-pressure cylinder inlet pressure, low-pressure cylinder inlet temperature, low-pressure cylinder exhaust pressure, and low-pressure cylinder exhaust temperature are connected to the signal acquisition and generation device to collect data; (3) The enthalpy drop of the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder is calculated; (4) The output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder, and the output coefficient of the low-pressure cylinder are calculated.

[0012] The method for testing the volume-time of the high-pressure cylinder inlet heat exchanger, the volume-time of the high-pressure cylinder front chamber, the volume-time of the high-pressure cylinder, the volume-time of the intermediate-pressure cylinder inlet heat exchanger, the volume-time of the intermediate cylinder, and the volume-time of the low-pressure cylinder inlet heat exchanger is characterized by comprising the following steps:

[0013] (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Simulate the high pressure intake valve command through the signal acquisition and generation device, and switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the high pressure intake valve command step by 5%; (4) Record the signal waveform data of high pressure intake valve feedback, salt cavern outlet pressure, high pressure cylinder intake pressure, high pressure cylinder regulating stage pressure, high pressure cylinder exhaust pressure, medium pressure cylinder intake pressure, medium pressure cylinder exhaust pressure, low pressure cylinder intake pressure, and low pressure cylinder exhaust pressure; (5) Identify the high pressure cylinder inlet heat exchanger volume time, high pressure cylinder front air chamber volume time, high pressure cylinder volume time, medium pressure cylinder inlet heat exchanger volume time, medium pressure cylinder volume time, and low pressure cylinder inlet heat exchanger volume time.

[0014] The output coefficient of the high-pressure cylinder is obtained by the following formula:

[0015]

[0016] Among them, F HP P is the output coefficient of the high-pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder. ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. igeH represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

[0017] The output coefficient of the intermediate pressure cylinder is obtained by the following formula:

[0018]

[0019] Among them, F IP P is the output coefficient of the intermediate pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder. ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. ige H represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

[0020] The low-pressure cylinder output coefficient is obtained using the following formula:

[0021]

[0022] Among them, F LP P is the output coefficient of the low-pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder.ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. ige H represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

[0023] The test method for the volume time of the high-pressure cylinder inlet heat exchanger is as follows: (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the high-pressure intake valve command step by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the salt cavern outlet pressure and the high-pressure cylinder intake pressure; (5) Use the salt cavern outlet pressure as the input curve and the high-pressure cylinder intake pressure as the output curve to identify the volume time of the high-pressure cylinder inlet heat exchanger.

[0024] The method for testing the volume time of the front chamber of the high-pressure cylinder is as follows: (1) Cut off the power control mode of the air turbine and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the step of the high-pressure intake valve command by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the high-pressure cylinder intake pressure, the high-pressure cylinder regulating stage pressure, and the high-pressure cylinder exhaust pressure; (5) Use the feedback of the high-pressure intake valve as the input curve and the high-pressure cylinder regulating stage pressure as the output curve to identify the volume time of the front chamber of the high-pressure cylinder; (6) Use the high-pressure cylinder regulating stage pressure as the input curve and the high-pressure cylinder exhaust pressure as the output curve to identify the volume time of the high-pressure cylinder.

[0025] The method for testing the volumetric time of the inlet heat exchanger of the intermediate pressure cylinder is as follows: (1) Cut off the power control mode of the air turbine and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the step of the high pressure intake valve command by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the high pressure cylinder exhaust pressure, the intermediate pressure cylinder intake pressure and the intermediate pressure cylinder exhaust pressure; (5) Use the high pressure cylinder exhaust pressure as the input curve and the intermediate pressure cylinder intake pressure as the output curve to identify the volumetric time of the inlet heat exchanger of the intermediate pressure cylinder; (6) Use the intermediate pressure cylinder intake pressure as the input curve and the intermediate pressure cylinder exhaust pressure as the output curve to identify the volumetric time of the intermediate pressure cylinder.

[0026] The test method for the volume time of the low-pressure cylinder inlet heat exchanger is as follows: (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the high-pressure intake valve command step by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the medium-pressure cylinder exhaust pressure and the low-pressure cylinder intake pressure; (5) Use the medium-pressure cylinder exhaust pressure as the input curve and the low-pressure cylinder intake pressure as the output curve to identify the volume time of the low-pressure cylinder inlet heat exchanger.

[0027] Switch the air turbine power control mode to the valve position control mode; switch the switch to the signal acquisition and generation device to the actuator controller; simulate a 5% step change in the high-pressure intake valve command through the signal acquisition and generation device; record the generator power waveform curve; compare the deviation between the actual generator power waveform curve and the model output generator power curve to determine whether the model parameter test meets the requirements; if the deviation meets the requirements, the model parameter test is correct; if the deviation does not meet the requirements, the test process needs to be checked and the model parameter test needs to be repeated.

[0028] Compared with the prior art, the beneficial effects of the present invention are: it can test the model parameters of the air turbine of the large compressed air energy storage power station through step tests during the operation of the air turbine, thus playing a fundamental role in ensuring the stable operation of the power grid; it solves the technical problems of the prior art, such as the lack of testing for the model parameters of the air turbine of the large compressed air energy storage power station, and the inability to accurately reflect the inherent characteristics of the air turbine of the large compressed air energy storage power station. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the system structure of this application.

[0031] Figure 2 This is the volumetric time identification diagram of the high-pressure cylinder inlet heat exchanger in this application.

[0032] Figure 3 This is the high-pressure cylinder front chamber volume time identification diagram of this application.

[0033] Figure 4 This is the high-pressure volumetric time identification diagram of this application.

[0034] Figure 5This is the volumetric time identification diagram of the intermediate-pressure cylinder inlet heat exchanger in this application.

[0035] Figure 6 This is the medium-pressure cylinder volume time identification diagram of this application.

[0036] Figure 7 This is the volumetric time identification diagram of the low-pressure cylinder inlet heat exchanger in this application.

[0037] Figure 8 This is a comparison chart of the actual power waveform curve of the generator in this application and the power curve of the generator in the test model.

[0038] Figure 9 This is a schematic diagram of the functional modules of the air turbine model in this application.

[0039] Figure 1 In the middle section: 1-Changeover switch, 2-Actuator controller, 3-Air turbine model functional module, 4-Signal acquisition and generation device, 5-Salt cavern, 6-High-pressure cylinder inlet heat exchanger, 7-High-pressure main air valve, 8-High-pressure regulating valve, 9-High-pressure supplementary air valve, 10-High-pressure cylinder, 11-Medium-pressure cylinder inlet heat exchanger, 12-Medium-pressure main air valve, 13-Medium-pressure regulating valve, 14-Medium-pressure cylinder, 15-Low-pressure cylinder inlet heat exchanger, 16-Low-pressure main air valve, 17-Low-pressure cylinder, 18-Generator. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] The terms “first,” “second,” etc., are used only to distinguish one entity or operation from another, and should not be construed as indicating or implying relative importance, nor as requiring or implying any such actual relationship or order between these entities or operations.

[0043] Compressed air energy storage is a new type of energy storage that is efficient and sustainable. However, existing technologies do not have testing methods for the air turbine model parameters of large-scale compressed air energy storage power stations, and therefore cannot accurately reflect the characteristics of the air turbine itself. Therefore, it is of great practical significance to carry out research on testing methods for the air turbine model parameters of large-scale compressed air energy storage power stations.

[0044] like Figure 1 As shown, this invention proposes a testing system and method for air turbine model parameters of a large-scale compressed air energy storage power station. This system allows for step tests during the operation of the air turbine in a large-scale compressed air energy storage power station, enabling the testing of the air turbine model parameters and providing a fundamental guarantee for the stable operation of the power grid. It also solves the technical problems of existing technologies that do not specifically address the testing of air turbine model parameters for large-scale compressed air energy storage power stations, thus failing to accurately reflect the inherent characteristics of the air turbine.

[0045] A parameter testing system for a large compressed air energy storage power station air turbine model includes an air turbine model functional module 3 and a signal acquisition and generation device 4. The system is characterized by an actuator controller 2 connected to the signal acquisition and generation device 4, receiving high-pressure intake valve signals output by the device; the actuator controller 2 is connected to the air turbine model functional module 3; the air turbine model functional module 3 outputs generator power to the signal acquisition and generation device 4; and the actuator controller 2 outputs high-pressure intake valve commands. The actuator controller 2 simultaneously sends the high-pressure intake valve command to the signal acquisition and generation device 4 and is connected to the signal acquisition and generation device 4; the feedback from the high-pressure intake valve, the outlet pressure of the salt cavern 5, the intake pressure of the high-pressure cylinder, the intake temperature of the high-pressure cylinder, the regulating stage pressure of the high-pressure cylinder, the exhaust pressure of the high-pressure cylinder, the exhaust temperature of the high-pressure cylinder, the intake pressure of the intermediate-pressure cylinder, the intake temperature of the intermediate-pressure cylinder, the exhaust pressure of the intermediate-pressure cylinder, the exhaust temperature of the intermediate-pressure cylinder, the intake pressure of the low-pressure cylinder, the intake temperature of the low-pressure cylinder, the exhaust pressure of the low-pressure cylinder, the exhaust temperature of the low-pressure cylinder, and the generator power are sent to the signal acquisition and generation device and are connected to the signal acquisition and generation device;

[0046] The high-pressure intake valve includes a high-pressure regulating valve 8 and a high-pressure replenishing valve 9. The high-pressure regulating valve 8 is used to regulate the intake volume of the air turbine under rated operating conditions, and the high-pressure replenishing valve 9 is used to regulate the supplementary intake volume of the air turbine after it exceeds the rated operating conditions.

[0047] The high-pressure intake valve is connected to the high-pressure cylinder inlet heat exchanger 6 via the high-pressure main air valve 7, and the high-pressure cylinder inlet heat exchanger 6 is connected to the salt cavern 5 outlet.

[0048] The high-pressure intake valve is connected to the high-pressure cylinder 10, the outlet of the high-pressure cylinder 10 is connected to the intermediate-pressure cylinder inlet heat exchanger 11, the outlet of the intermediate-pressure cylinder inlet heat exchanger 11 is connected to the intermediate-pressure main air valve 12, the intermediate-pressure main air valve 12 is connected to the intermediate-pressure regulating valve 13, the intermediate-pressure regulating valve 13 is connected to the intermediate-pressure cylinder 14, the outlet of the intermediate-pressure cylinder 14 is connected to the low-pressure cylinder inlet heat exchanger 15, the outlet of the low-pressure cylinder inlet heat exchanger 15 is connected to the low-pressure main air valve 16, the low-pressure main air valve 16 is connected to the low-pressure cylinder 17, the outlet of the low-pressure cylinder 17 is connected to the atmosphere, and the generator 18 is connected to the low-pressure cylinder 17 via a shaft.

[0049] The air turbine model functional module is as follows: Figure 9 As shown:

[0050] Among them, P CV F represents the opening degree of the high-pressure intake valve. HP F is the output coefficient of the high-pressure cylinder. IP F is the output coefficient of the intermediate pressure cylinder. LP T is the output coefficient of the low-pressure cylinder. HE T is the volumetric time of the high-pressure cylinder inlet heat exchanger. CH T is the volumetric time of the high-pressure cylinder's front chamber. GYG T is the high-pressure cylinder volumetric time. IE T is the volumetric time of the heat exchanger at the inlet of the intermediate-pressure cylinder. ZYG For the intermediate pressure cylinder volumetric time, T LE For the low-pressure cylinder inlet heat exchanger volumetric time, P E Where λ is the generator power and λ is the high-pressure cylinder over-adjustment coefficient, which is 0.44, based on the design value provided by the equipment manufacturer.

[0051] A method for testing parameters of an air turbine model in a large compressed air energy storage power station, using the system described above, includes testing methods for the output coefficient of the high-pressure cylinder, the output coefficient of the intermediate-pressure cylinder, the output coefficient of the low-pressure cylinder, the volume-time test of the inlet heat exchanger of the high-pressure cylinder, the volume-time test of the front chamber of the high-pressure cylinder, the volume-time test of the high-pressure cylinder, the volume-time test of the inlet heat exchanger of the intermediate-pressure cylinder, the volume-time test of the intermediate cylinder, and the volume-time test of the inlet heat exchanger of the low-pressure cylinder.

[0052] The method for testing the output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder, and the output coefficient of the low-pressure cylinder is characterized by the following steps: (1) The electrical load of the air turbine is greater than 30% of the rated load, and stable operation is maintained; (2) The high-pressure cylinder inlet pressure, high-pressure cylinder inlet temperature, high-pressure cylinder exhaust pressure, high-pressure cylinder exhaust temperature, medium-pressure cylinder inlet pressure, medium-pressure cylinder inlet temperature, medium-pressure cylinder exhaust pressure, medium-pressure cylinder exhaust temperature, low-pressure cylinder inlet pressure, low-pressure cylinder inlet temperature, low-pressure cylinder exhaust pressure, and low-pressure cylinder exhaust temperature are connected to the signal acquisition and generation device to collect data; (3) The enthalpy drop of the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder is calculated; (4) The output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder, and the output coefficient of the low-pressure cylinder are calculated.

[0053] The method for testing the volume-time of the high-pressure cylinder inlet heat exchanger, the volume-time of the high-pressure cylinder front chamber, the volume-time of the high-pressure cylinder, the volume-time of the intermediate-pressure cylinder inlet heat exchanger, the volume-time of the intermediate cylinder, and the volume-time of the low-pressure cylinder inlet heat exchanger is characterized by comprising the following steps:

[0054] (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Simulate the high pressure intake valve command through the signal acquisition and generation device, and switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the high pressure intake valve command step by 5%; (4) Record the signal waveform data of high pressure intake valve feedback, salt cavern outlet pressure, high pressure cylinder intake pressure, high pressure cylinder regulating stage pressure, high pressure cylinder exhaust pressure, medium pressure cylinder intake pressure, medium pressure cylinder exhaust pressure, low pressure cylinder intake pressure, and low pressure cylinder exhaust pressure; (5) Identify the high pressure cylinder inlet heat exchanger volume time, high pressure cylinder front air chamber volume time, high pressure cylinder volume time, medium pressure cylinder inlet heat exchanger volume time, medium pressure cylinder volume time, and low pressure cylinder inlet heat exchanger volume time.

[0055] A method for testing parameters of an air turbine model in a large compressed air energy storage power station, based on data collected by a signal acquisition device, specifies the following parameters: high-pressure cylinder inlet pressure 7.08 MPa, high-pressure cylinder inlet temperature 152℃, high-pressure cylinder exhaust pressure 0.94 MPa, high-pressure cylinder exhaust temperature 26.5℃; intermediate-pressure cylinder inlet pressure 0.93 MPa, intermediate-pressure cylinder inlet temperature 141℃, intermediate-pressure cylinder exhaust pressure 0.23 MPa, intermediate-pressure cylinder exhaust temperature 18℃; low-pressure cylinder inlet pressure 0.22 MPa, low-pressure cylinder inlet temperature 121℃, low-pressure cylinder exhaust pressure 0.1 MPa. The low-pressure cylinder exhaust temperature is 62.5℃. The calculated enthalpy of the high-pressure cylinder intake is 153.44 kJ / kg, and the high-pressure cylinder exhaust is 26.64 kJ / kg. The enthalpy of the intermediate-pressure cylinder intake is 142.26 kJ / kg, and the intermediate-pressure cylinder exhaust is 18.09 kJ / kg. The enthalpy of the low-pressure cylinder intake is 121.96 kJ / kg, and the low-pressure cylinder exhaust is 62.87 kJ / kg. The output coefficients of the high-pressure, intermediate-pressure, and low-pressure cylinders can be obtained using the following formulas: high-pressure cylinder output coefficient is 0.409, intermediate-pressure cylinder output coefficient is 0.400, and low-pressure cylinder output coefficient is 0.191.

[0056]

[0057]

[0058] Among them, F HP F is the output coefficient of the high-pressure cylinder. IP F is the output coefficient of the intermediate pressure cylinder. LP P is the output coefficient of the low-pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder. ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. ige H represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

[0059] The test method for the volumetric time of the high-pressure cylinder inlet heat exchanger is as follows: (1) Turn off the air turbine power control mode and turn on the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate a 5% step of the high-pressure intake valve command through the signal acquisition and generation device; (4) Record the waveform curves of the salt cavern outlet pressure and the high-pressure cylinder intake pressure; (5) Using the salt cavern outlet pressure as the input curve and the high-pressure cylinder intake pressure as the output curve, identify that the volumetric time of the high-pressure cylinder inlet heat exchanger is 0.01s. Figure 2 As shown.

[0060] The test method for the high-pressure cylinder front chamber volume time and high-pressure cylinder volume time is as follows: (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Switch the switch 1 to the signal acquisition and generation device 4 to the actuator controller 2; (3) Simulate the high-pressure intake valve command step of 5% through the signal acquisition and generation device 4; (4) Record the waveform curves of the high-pressure cylinder intake pressure, the high-pressure cylinder regulating stage pressure, and the high-pressure cylinder exhaust pressure; (5) Using the high-pressure intake valve feedback as the input curve and the high-pressure cylinder regulating stage pressure as the output curve, identify that the high-pressure cylinder front chamber volume time is 0.38s. Figure 3 As shown; (6) using the high-pressure cylinder regulating stage pressure as the input curve and the high-pressure cylinder exhaust pressure as the output curve, the high-pressure cylinder volumetric time was identified as 27.67s, as shown. Figure 4 As shown.

[0061] The test method for the intermediate pressure cylinder inlet heat exchanger volume time and intermediate pressure cylinder volume time is as follows: (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Switch the switch 1 to the signal acquisition and generation device 4 to the actuator controller 2; (3) Simulate the high pressure intake valve command step of 5% through the signal acquisition and generation device 4; (4) Record the waveform curves of the high pressure cylinder exhaust pressure, intermediate pressure cylinder intake pressure, and intermediate pressure cylinder exhaust pressure; (5) Using the high pressure cylinder exhaust pressure as the input curve and the intermediate pressure cylinder intake pressure as the output curve, identify that the intermediate pressure cylinder inlet heat exchanger volume time is 1.59s. Figure 5 As shown; (6) using the intermediate pressure cylinder intake pressure as the input curve and the intermediate pressure cylinder exhaust pressure as the output curve, the intermediate pressure cylinder volumetric time was identified as 13.11s, as shown. Figure 6 As shown.

[0062] The test method for the volumetric time of the low-pressure cylinder inlet heat exchanger is as follows: (1) Turn off the air turbine power control mode and turn on the valve position control mode; (2) Switch the switch 1 to the signal acquisition and generation device 4 to the actuator controller 2; (3) Simulate a 5% step of the high-pressure intake valve command through the signal acquisition and generation device 4; (4) Record the waveform curves of the medium-pressure cylinder exhaust pressure and the low-pressure cylinder intake pressure; (5) Using the medium-pressure cylinder exhaust pressure as the input curve and the low-pressure cylinder intake pressure as the output curve, identify that the volumetric time of the low-pressure cylinder inlet heat exchanger is 1.56s. Figure 7 As shown.

[0063] Switch the air turbine power control mode to the valve position control mode; switch the switch 1 to the signal acquisition and generation device 4 to the actuator controller 2; simulate a 5% step change in the high-pressure intake valve command through the signal acquisition and generation device 4; record the generator power waveform curve; compare the deviation between the actual generator power waveform curve and the model output generator power curve to determine whether the model parameter test meets the requirements; if the deviation meets the requirements, the model parameter test is correct; if the deviation does not meet the requirements, the test process needs to be checked and the model parameter test needs to be repeated.

[0064] like Figure 8 As shown, this application presents a comparison chart of the actual power waveform curve of the generator and the generator power curve of the test model in a parameter testing system and method for a large compressed air energy storage power station. Figure 8 As can be seen from the above, this application provides a testing system and method for air turbine model parameters of a large compressed air energy storage power station. The test curves of the model parameters have a small deviation from the actual curves, which solves the technical problems of existing technologies that do not have testing methods for air turbine model parameters of large compressed air energy storage power stations and cannot accurately reflect the characteristics of the air turbine itself.

[0065] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A parameter testing system for a large-scale compressed air energy storage power station air turbine model, comprising an air turbine model functional module and a signal acquisition and generation device, characterized in that, It also includes an actuator controller, which is connected to the signal acquisition and generation device and receives the high-pressure air intake valve signal output by the signal acquisition and generation device; the actuator controller is connected to the air turbine model function module; the air turbine model function module outputs generator power and sends it to the signal acquisition and generation device and is connected to the signal acquisition and generation device; the actuator controller outputs a high-pressure air intake valve command and is connected to the high-pressure air intake valve, and the actuator controller also sends the high-pressure air intake valve command to the signal acquisition and generation device and is connected to the signal acquisition and generation device. The high-pressure intake valve includes a high-pressure regulating valve and a high-pressure replenishing valve. The high-pressure regulating valve is used to regulate the intake volume of the air turbine under rated operating conditions, and the high-pressure replenishing valve is used to regulate the supplementary intake volume of the air turbine after it exceeds the rated operating conditions. The high-pressure intake valve is connected to the high-pressure cylinder inlet heat exchanger via the high-pressure main air valve, and the high-pressure cylinder inlet heat exchanger is connected to the salt cavern outlet. The high-pressure intake valve is connected to the high-pressure cylinder, the high-pressure cylinder outlet is connected to the intermediate-pressure cylinder inlet heat exchanger, the intermediate-pressure cylinder inlet heat exchanger outlet is connected to the intermediate-pressure main air valve, the intermediate-pressure main air valve is connected to the intermediate-pressure regulating valve, the intermediate-pressure regulating valve is connected to the intermediate-pressure cylinder, the intermediate-pressure cylinder outlet is connected to the low-pressure cylinder inlet heat exchanger, the low-pressure cylinder inlet heat exchanger outlet is connected to the low-pressure main air valve, the low-pressure main air valve is connected to the low-pressure cylinder, the low-pressure cylinder outlet is connected to the atmosphere, and the generator is connected to the low-pressure cylinder via a shaft.

2. A method for testing parameters of an air turbine model in a large compressed air energy storage power station, using the system described in claim 1, wherein the testing method includes testing the output coefficient of the high-pressure cylinder, the output coefficient of the intermediate-pressure cylinder, the output coefficient of the low-pressure cylinder, the volume-time test of the high-pressure cylinder inlet heat exchanger, the volume-time test of the high-pressure cylinder front chamber, the volume-time test of the high-pressure cylinder, the volume-time test of the intermediate-pressure cylinder inlet heat exchanger, the volume-time test of the intermediate cylinder, and the volume-time test of the low-pressure cylinder inlet heat exchanger; The method for testing the output coefficients of the high-pressure cylinder, the medium-pressure cylinder, and the low-pressure cylinder is characterized in that... The following steps are included: (1) The air turbine electrical load is greater than 30% of the rated load, and stable operation is maintained; (2) The high-pressure cylinder inlet pressure, high-pressure cylinder inlet temperature, high-pressure cylinder exhaust pressure, high-pressure cylinder exhaust temperature, medium-pressure cylinder inlet pressure, medium-pressure cylinder inlet temperature, medium-pressure cylinder exhaust pressure, medium-pressure cylinder exhaust temperature, low-pressure cylinder inlet pressure, low-pressure cylinder inlet temperature, low-pressure cylinder exhaust pressure, and low-pressure cylinder exhaust temperature are connected to the signal acquisition and generation device to collect data; (3) Calculate the enthalpy drop of the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder; (4) Calculate the output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder, and the output coefficient of the low-pressure cylinder. The method for testing the volume and time of the high-pressure cylinder inlet heat exchanger, the volume and time of the high-pressure cylinder front chamber, the high-pressure cylinder volume and time, the intermediate-pressure cylinder inlet heat exchanger, the intermediate cylinder volume and time, and the low-pressure cylinder inlet heat exchanger, is characterized by including the following steps: (1) disconnecting the air turbine power control mode and engaging the valve position control mode; (2) simulating the high-pressure intake valve command through a signal acquisition and generation device, and switching the switch to the signal acquisition and generation device to the actuator controller; (3) (3) Simulate a step of 5% for the high-pressure intake valve command; (4) Record the waveform data of the high-pressure intake valve feedback, salt cavern outlet pressure, high-pressure cylinder intake pressure, high-pressure cylinder regulating stage pressure, high-pressure cylinder exhaust pressure, medium-pressure cylinder intake pressure, medium-pressure cylinder exhaust pressure, low-pressure cylinder intake pressure, and low-pressure cylinder exhaust pressure signals; (5) Identify the high-pressure cylinder inlet heat exchanger volume time, high-pressure cylinder front chamber volume time, high-pressure cylinder volume time, medium-pressure cylinder inlet heat exchanger volume time, medium-pressure cylinder volume time, and low-pressure cylinder inlet heat exchanger volume time.

3. The method for testing the parameters of an air turbine model in a large compressed air energy storage power station according to claim 2, characterized in that, The output coefficient of the high-pressure cylinder is obtained by the following formula: Among them, F HP P is the output coefficient of the high-pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder. ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. ige H represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

4. The method for testing parameters of a large-scale compressed air energy storage power station air turbine model according to claim 2, characterized in that, The output coefficient of the intermediate pressure cylinder is obtained by the following formula: Among them, F IP P is the output coefficient of the intermediate pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder. ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. ige H represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

5. The method for testing the parameters of a large compressed air energy storage power station air turbine model according to claim 2, characterized in that, The low-pressure cylinder output coefficient is obtained using the following formula: Among them, F LP P is the output coefficient of the low-pressure cylinder. hg T represents the intake pressure of the high-pressure cylinder. hg H represents the intake temperature of the high-pressure cylinder. hg For the intake enthalpy of the high-pressure cylinder, P hge T represents the exhaust pressure of the high-pressure cylinder. hge H represents the exhaust temperature of the high-pressure cylinder. hge For the exhaust enthalpy of the high-pressure cylinder, P ig T is the intake pressure of the intermediate pressure cylinder. ig H is the intake temperature of the intermediate pressure cylinder. ig For the intake enthalpy of the intermediate-pressure cylinder, P ige T is the exhaust pressure of the intermediate pressure cylinder. ige H represents the exhaust temperature of the intermediate-pressure cylinder. ige P is the exhaust enthalpy of the intermediate-pressure cylinder. lg For the low-pressure cylinder intake pressure, T lg For the low-pressure cylinder intake temperature, H lg For the intake enthalpy of the low-pressure cylinder, P lge For low-pressure cylinder exhaust pressure, T lge For low-pressure cylinder exhaust temperature, H lge This refers to the exhaust enthalpy of the low-pressure cylinder.

6. The method for testing parameters of a large compressed air energy storage power station air turbine model according to claim 2, characterized in that, The test method for the volume time of the high-pressure cylinder inlet heat exchanger is as follows: (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the high-pressure intake valve command step by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the salt cavern outlet pressure and the high-pressure cylinder intake pressure; (5) Use the salt cavern outlet pressure as the input curve and the high-pressure cylinder intake pressure as the output curve to identify the volume time of the high-pressure cylinder inlet heat exchanger.

7. The method for testing parameters of a large compressed air energy storage power station air turbine model according to claim 2, characterized in that, The method for testing the volume time of the front chamber of the high-pressure cylinder is as follows: (1) Cut off the power control mode of the air turbine and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the step of the high-pressure intake valve command by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the high-pressure cylinder intake pressure, the high-pressure cylinder regulating stage pressure, and the high-pressure cylinder exhaust pressure; (5) Use the feedback of the high-pressure intake valve as the input curve and the high-pressure cylinder regulating stage pressure as the output curve to identify the volume time of the front chamber of the high-pressure cylinder; (6) Use the high-pressure cylinder regulating stage pressure as the input curve and the high-pressure cylinder exhaust pressure as the output curve to identify the volume time of the high-pressure cylinder.

8. The method for testing parameters of a large compressed air energy storage power station air turbine model according to claim 2, characterized in that, The method for testing the volumetric time of the inlet heat exchanger of the intermediate pressure cylinder is as follows: (1) Cut off the power control mode of the air turbine and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the step of the high pressure intake valve command by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the high pressure cylinder exhaust pressure, the intermediate pressure cylinder intake pressure and the intermediate pressure cylinder exhaust pressure; (5) Use the high pressure cylinder exhaust pressure as the input curve and the intermediate pressure cylinder intake pressure as the output curve to identify the volumetric time of the inlet heat exchanger of the intermediate pressure cylinder; (6) Use the intermediate pressure cylinder intake pressure as the input curve and the intermediate pressure cylinder exhaust pressure as the output curve to identify the volumetric time of the intermediate pressure cylinder.

9. The method for testing parameters of a large-scale compressed air energy storage power station air turbine model according to claim 2, characterized in that, The test method for the volume time of the low-pressure cylinder inlet heat exchanger is as follows: (1) Cut off the air turbine power control mode and put into the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate the high-pressure intake valve command step by 5% through the signal acquisition and generation device; (4) Record the waveform curves of the medium-pressure cylinder exhaust pressure and the low-pressure cylinder intake pressure; (5) Use the medium-pressure cylinder exhaust pressure as the input curve and the low-pressure cylinder intake pressure as the output curve to identify the volume time of the low-pressure cylinder inlet heat exchanger.

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