System and method for testing parameters of air turbine model of large compressed air energy storage power station

Abstract

The invention relates to a large-scale compressed air energy storage power station air turbine model parameter test system and method, and the system comprises an air turbine model function module and a signal collection and generation device, and also comprises an execution mechanism controller which is connected with the signal collection and generation device. Receiving a high-pressure air inlet valve signal output by the signal acquisition and generation device; the actuating mechanism controller is connected with the air turbine model function module; the air turbine model function module outputs generator power to the signal acquisition and generation device to be connected with the signal acquisition and generation device; the executing mechanism controller outputs a high-pressure air inlet valve instruction to be connected with the high-pressure air inlet valve, and meanwhile the executing mechanism controller sends the high-pressure air inlet valve instruction to the signal collecting and generating device to be connected with the signal collecting and generating device. According to the application, the air turbine model parameters of the large-scale compressed air energy storage power station can be tested, so that the characteristics of the air turbine of the large-scale compressed air energy storage power station can be accurately reflected, and a basic guarantee effect is achieved for stable operation of a power grid.

Description

Technical Field

[0001] The present application relates to the field of air energy storage technology, and in particular to a system and method for testing parameters of an air turbine model of a large-scale compressed air energy storage power station. Background Art

[0002] For the power system, whether it is calculation and analysis, planning and operation or control and protection, it must be based on accurate and reliable mathematical models. Testing the unit model parameters can provide accurate calculation data for system stability analysis and daily production and scheduling of the power grid. 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 is a new type of efficient and sustainable energy storage method with the advantages of large capacity and long service life. It has broad application prospects in renewable energy utilization and power grid peak regulation. It is of great significance to carry out research on the relevant characteristic parameters of compressed air energy storage. However, the existing technology does not test the parameters of the air turbine model of large-scale compressed air energy storage power stations, and cannot accurately reflect the characteristics of the air turbine of large-scale compressed air energy storage power stations. It is of great practical significance to carry out research on the test method of the air turbine model parameters of large-scale compressed air energy storage power stations. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a system and method for testing the air turbine model parameters of a large-scale compressed air energy storage power station, so as to solve the technical problems that the prior art does not have any test for the air turbine model parameters of a large-scale compressed air energy storage power station and cannot accurately reflect the inherent characteristics of the air turbine of the large-scale compressed air energy storage power station.

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

[0006] In the first aspect, the present application provides an air turbine model parameter test system for a large-scale compressed air energy storage power station, the test system comprising an air turbine model function module and a signal acquisition generator, the actuator controller being connected to the signal acquisition generator to receive the high-pressure intake valve signal output by the signal acquisition generator; the actuator controller being connected to the air turbine model function module; the air turbine model function module outputting the generator power to the signal acquisition generator and being connected to the signal acquisition generator; the actuator controller outputting the high-pressure intake valve instruction and being connected to the high-pressure intake valve, the actuator controller simultaneously sending the high-pressure intake valve instruction to the signal acquisition generator and being connected to the signal acquisition generator; the high-pressure intake valve feedback, 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 medium-pressure cylinder intake pressure, the medium-pressure cylinder intake temperature, the medium-pressure cylinder exhaust pressure, the medium-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, the generator power being sent to the signal acquisition generator and being connected to the signal acquisition generator;

[0007] The high-pressure air intake valve includes a high-pressure regulating valve and a high-pressure air supply valve. The high-pressure regulating valve is used to adjust the air intake amount under the rated working condition of the air turbine, and the high-pressure air supply valve is used to adjust the supplementary air intake after the air turbine exceeds the rated working condition.

[0008] The high-pressure air inlet valve is connected to the high-pressure cylinder inlet heat exchanger through 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 medium-pressure cylinder inlet heat exchanger, the medium-pressure cylinder inlet heat exchanger outlet is connected to the medium-pressure main air valve, the medium-pressure main air valve is connected to the medium-pressure regulating valve, the medium-pressure regulating valve is connected to the medium-pressure cylinder, the medium-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 through a shaft.

[0010] In a second aspect, the present application provides a method for testing parameters of an air turbine model of a large-scale compressed air energy storage power station, using the system as described above, the testing method includes a high-pressure cylinder output coefficient test, a medium-pressure cylinder output coefficient test, a low-pressure cylinder output coefficient test, a high-pressure cylinder inlet heat exchanger volume time test, a high-pressure cylinder front air chamber volume time test, a high-pressure cylinder volume time test, a medium-pressure cylinder inlet heat exchanger volume time test, a medium cylinder volume time test, and a low-pressure cylinder inlet heat exchanger volume time test method;

[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 in that it includes the following steps: (1) the electrical load of the air turbine is greater than 30% of the rated load to maintain stable operation; (2) the high-pressure cylinder intake pressure, the high-pressure cylinder intake temperature, the high-pressure cylinder exhaust pressure, the high-pressure cylinder exhaust temperature, the medium-pressure cylinder intake pressure, the medium-pressure cylinder intake temperature, the medium-pressure cylinder exhaust pressure, the medium-pressure cylinder exhaust temperature, the low-pressure cylinder intake pressure, the low-pressure cylinder intake temperature, the low-pressure cylinder exhaust pressure and the low-pressure cylinder exhaust temperature are connected to a signal acquisition device to collect data; (3) the enthalpy drop of the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder is calculated; (4) the output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder and the low-pressure cylinder are calculated;

[0012] The method for testing the volume time of the heat exchanger at the inlet of the high-pressure cylinder, the volume time of the air chamber in front of the high-pressure cylinder, the volume time of the high-pressure cylinder, the volume time of the medium-pressure cylinder, the volume time of the heat exchanger at the inlet of the medium-pressure cylinder, the volume time of the medium-pressure cylinder, and the volume time of the heat exchanger at the inlet of the low-pressure cylinder is characterized in that it comprises the following steps:

[0013] (1) Cut off the air turbine power control mode and switch to 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 a 5% step of the high-pressure intake valve command; (4) Record 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 signal waveform data; (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 high pressure cylinder output coefficient is obtained by the following formula:

[0015]

[0016] Among them, F HP is the high pressure cylinder output coefficient, P hg is the intake pressure of the high pressure cylinder, T hg is the high pressure cylinder inlet temperature, H hg is the intake enthalpy of the high pressure cylinder, P hge is the high pressure cylinder exhaust pressure, T hge is the high pressure cylinder exhaust temperature, H hge is the exhaust enthalpy of the high pressure cylinder, P ig is the intake pressure of the medium pressure cylinder, T ig is the medium pressure cylinder inlet temperature, H ig is the intake enthalpy of the intermediate pressure cylinder, P ige is the exhaust pressure of the medium pressure cylinder, T igeis the exhaust temperature of the intermediate pressure cylinder, H ige is the exhaust enthalpy of the intermediate pressure cylinder, P lg is the intake pressure of the low pressure cylinder, T lg is the low pressure cylinder intake temperature, H lg is the intake enthalpy of the low pressure cylinder, P lge is the exhaust pressure of the low pressure cylinder, T lge is the exhaust temperature of the low pressure cylinder, H lge is the exhaust enthalpy of the low-pressure cylinder.

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

[0018]

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

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

[0021]

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

[0023] The test method for the volume time of the heat exchanger at the inlet of the high-pressure cylinder is as follows: (1) the air turbine power control mode is cut off and the valve position control mode is switched on; (2) the switching switch is switched to the signal acquisition and generation device to the actuator controller; (3) a 5% high-pressure intake valve command step is simulated through the signal acquisition and generation device; (4) the salt cavern outlet pressure and the high-pressure cylinder intake pressure waveform curves are recorded; (5) the salt cavern outlet pressure is used as the input curve and the high-pressure cylinder intake pressure is used as the output curve to identify the volume time of the heat exchanger at the inlet of the high-pressure cylinder.

[0024] The test method for the volume time of the air chamber in front of the high-pressure cylinder is as follows: (1) cut off the air turbine power control mode and start the valve position control mode; (2) switch the switching switch to the signal acquisition and generation device to the actuator controller; (3) simulate a 5% high-pressure intake valve command step 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 high-pressure intake valve feedback as the input curve and the high-pressure cylinder regulating stage pressure as the output curve to identify the volume time of the air chamber in front 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 test method for the volume time of the heat exchanger at the inlet of the intermediate pressure cylinder is as follows: (1) Cut off the air turbine power control mode and start the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate a 5% high-pressure intake valve command step 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 volume time of the heat exchanger at the inlet 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 volume time of the intermediate pressure cylinder.

[0026] The test method for the volume time of the heat exchanger at the inlet of the low-pressure cylinder is as follows: (1) cut off the air turbine power control mode and start the valve position control mode; (2) switch the switching switch to the signal acquisition and generation device to the actuator controller; (3) simulate a 5% high-pressure intake valve command step through the signal acquisition and generation device; (4) record the waveform curves of the exhaust pressure of the intermediate pressure cylinder and the intake pressure of the low-pressure cylinder; (5) use the exhaust pressure of the intermediate pressure cylinder as the input curve and the intake pressure of the low-pressure cylinder as the output curve to identify the volume time of the heat exchanger at the inlet of the low-pressure cylinder.

[0027] Cut off the air turbine power control mode and switch to the valve position control mode; switch the switch to the signal acquisition and generation device to the actuator controller; simulate a 5% high-pressure intake valve command step 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, it is necessary to check the test process and re-test the model parameters.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the model parameters of the air turbine of a large-scale compressed air energy storage power station can be tested through a step test during the operation of the air turbine of the large-scale compressed air energy storage power station, which plays a basic role in ensuring the stable operation of the power grid; it solves the technical problems that the prior art does not have any test on the model parameters of the air turbine of a large-scale compressed air energy storage power station, and cannot accurately reflect the inherent characteristics of the air turbine of the large-scale compressed air energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

[0031] Figure 2 It is the volume time identification diagram of the high pressure cylinder inlet heat exchanger of the present application.

[0032] Figure 3 It is a time identification diagram of the volume of the front air chamber of the high-pressure cylinder of the present application.

[0033] Figure 4 It is the high pressure volume time identification diagram of this application.

[0034] Figure 5It is the volume time identification diagram of the medium pressure cylinder inlet heat exchanger of the present application.

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

[0036] Figure 7 It is the volume time identification diagram of the low pressure cylinder inlet heat exchanger of the present application.

[0037] Figure 8 It is a comparison diagram of the actual power waveform curve of the generator of the present application and the generator power curve of the test model.

[0038] Fig. 9 It is a schematic diagram of the functional modules of the air turbine model of this application.

[0039] Figure 1 In: 1-switch, 2-actuator controller, 3-air turbine model function module, 4-signal acquisition generator, 5-salt cave, 6-high-pressure cylinder inlet heat exchanger, 7-high-pressure main air valve, 8-high-pressure regulating valve, 9-high-pressure air supply 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 DESCRIPTION

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

[0041] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

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

[0043] Compressed air energy storage is a highly efficient and sustainable new energy storage method. The existing technology does not test the air turbine model parameters of large-scale compressed air energy storage power stations, and cannot accurately reflect the inherent characteristics of the air turbines of large-scale compressed air energy storage power stations. It is of great practical significance to carry out research on the testing method of air turbine model parameters of large-scale compressed air energy storage power stations.

[0044] like Figure 1 As shown, the present invention proposes a large-scale compressed air energy storage power station air turbine model parameter testing system and method, which can test the air turbine model parameters of the large-scale compressed air energy storage power station through a step test during the operation of the air turbine of the large-scale compressed air energy storage power station, and play a basic guarantee role in the stable operation of the power grid; it solves the technical problems that the prior art does not have a test for the air turbine model parameters of the large-scale compressed air energy storage power station, and cannot accurately reflect the inherent characteristics of the air turbine of the large-scale compressed air energy storage power station.

[0045] A large-scale compressed air energy storage power station air turbine model parameter test system, the test system includes an air turbine model function module 3 and a signal acquisition generating device 4, characterized in that an actuator controller 2 is connected to the signal acquisition generating device 4 to receive a high-pressure intake valve signal output by the signal acquisition generating device 4; the actuator controller 2 is connected to the air turbine model function module 3; the air turbine model function module 3 outputs a generator power to the signal acquisition generating device 4 and is connected to the signal acquisition generating device 4; the actuator controller 2 outputs a high-pressure intake valve instruction and is connected to the high-pressure intake valve The actuator controller 2 simultaneously sends the high-pressure intake valve command to the signal acquisition generating device 4 and is connected to the signal acquisition generating device 4; the high-pressure intake valve feedback, the salt cavern 5 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 medium-pressure cylinder intake pressure, the medium-pressure cylinder intake temperature, the medium-pressure cylinder exhaust pressure, the medium-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 generating device and are connected to the signal acquisition generating device;

[0046] The high-pressure air intake valve includes a high-pressure regulating valve 8 and a high-pressure air supply valve 9. The high-pressure regulating valve 8 is used to adjust the air intake amount under the rated working condition of the air turbine, and the high-pressure air supply valve 9 is used to adjust the supplementary air intake after the air turbine exceeds the rated working condition.

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

[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 medium-pressure cylinder inlet heat exchanger 11, the outlet of the medium-pressure cylinder inlet heat exchanger 11 is connected to the medium-pressure main air valve 12, the medium-pressure main air valve 12 is connected to the medium-pressure regulating valve 13, the medium-pressure regulating valve 13 is connected to the medium-pressure cylinder 14, the outlet of the medium-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 through a shaft;

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

[0050] Among them, P CV is the opening of the high pressure intake valve, F HP is the high pressure cylinder output coefficient, F IP is the output coefficient of the medium pressure cylinder, F LP is the output coefficient of the low-pressure cylinder, T HE is the volume time of the heat exchanger at the inlet of the high pressure cylinder, T CH is the volume time of the air chamber in front of the high pressure cylinder, T GYG is the high pressure cylinder volume time, T IE is the volume time of the heat exchanger at the inlet of the medium pressure cylinder, T ZYG is the volume time of the medium pressure cylinder, T LE is the volume time of the heat exchanger at the inlet of the low pressure cylinder, P E is the generator power, λ is the over-modulation coefficient of the high-pressure cylinder, and the design value provided by the equipment manufacturer is 0.44.

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

[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 in that it includes the following steps: (1) the electrical load of the air turbine is greater than 30% of the rated load to maintain stable operation; (2) the high-pressure cylinder intake pressure, the high-pressure cylinder intake temperature, the high-pressure cylinder exhaust pressure, the high-pressure cylinder exhaust temperature, the medium-pressure cylinder intake pressure, the medium-pressure cylinder intake temperature, the medium-pressure cylinder exhaust pressure, the medium-pressure cylinder exhaust temperature, the low-pressure cylinder intake pressure, the low-pressure cylinder intake temperature, the low-pressure cylinder exhaust pressure and the low-pressure cylinder exhaust temperature are connected to a signal acquisition device to collect data; (3) the enthalpy drop of the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder is calculated; (4) the output coefficient of the high-pressure cylinder, the output coefficient of the medium-pressure cylinder and the low-pressure cylinder are calculated;

[0053] The method for testing the volume time of the heat exchanger at the inlet of the high-pressure cylinder, the volume time of the air chamber in front of the high-pressure cylinder, the volume time of the high-pressure cylinder, the volume time of the medium-pressure cylinder, the volume time of the heat exchanger at the inlet of the medium-pressure cylinder, the volume time of the medium-pressure cylinder, and the volume time of the heat exchanger at the inlet of the low-pressure cylinder is characterized in that it comprises the following steps:

[0054] (1) Cut off the air turbine power control mode and switch to 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 a 5% step of the high-pressure intake valve command; (4) Record 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 signal waveform data; (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 the parameters of an air turbine model of a large compressed air energy storage power station. According to the data collected by the signal acquisition and generation device, the high-pressure cylinder intake pressure is 7.08MPa, the high-pressure cylinder intake temperature is 152°C, the high-pressure cylinder exhaust pressure is 0.94MPa, the high-pressure cylinder exhaust temperature is 26.5°C, the medium-pressure cylinder intake pressure is 0.93MPa, the medium-pressure cylinder intake temperature is 141°C, the medium-pressure cylinder exhaust pressure is 0.23MPa, the medium-pressure cylinder exhaust temperature is 18°C, the low-pressure cylinder intake pressure is 0.22MPa, the low-pressure cylinder intake temperature is 121°C, the low-pressure cylinder exhaust pressure is 0.1MPa, The exhaust temperature of the low-pressure cylinder is 62.5℃. The calculated intake enthalpy of the high-pressure cylinder is 153.44kJ / kg, the exhaust enthalpy of the high-pressure cylinder is 26.64kJ / kg, the intake enthalpy of the medium-pressure cylinder is 142.26kJ / kg, the exhaust enthalpy of the medium-pressure cylinder is 18.09kJ / kg, the intake enthalpy of the low-pressure cylinder is 121.96kJ / kg, and the exhaust enthalpy of the low-pressure cylinder is 62.87kJ / kg. 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 can be obtained by the following formula. The output coefficient of the high-pressure cylinder is 0.409, the output coefficient of the medium-pressure cylinder is 0.400, and the output coefficient of the low-pressure cylinder is 0.191:

[0056]

[0057]

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

[0059] The volume time test method of the heat exchanger at the entrance of the high-pressure cylinder is as follows: (1) the air turbine power control mode is cut off and the valve position control mode is put into operation; (2) the switch is switched to the signal acquisition and generation device to the actuator controller; (3) a 5% high-pressure intake valve command step is simulated by the signal acquisition and generation device; (4) the salt cavern outlet pressure and the high-pressure cylinder intake pressure waveform curve are recorded; (5) the salt cavern outlet pressure is used as the input curve and the high-pressure cylinder intake pressure is used as the output curve to identify that the volume time of the heat exchanger at the entrance of the high-pressure cylinder is 0.01s. Figure 2 shown.

[0060] The test methods for the volume time of the air chamber in front of the high-pressure cylinder and the volume time of the high-pressure cylinder are as follows: (1) the air turbine power control mode is cut off and the valve position control mode is switched on; (2) the switch 1 is switched to the signal acquisition and generation device 4 to the actuator controller 2; (3) a 5% high-pressure intake valve command step is simulated through the signal acquisition and generation device 4; (4) the waveform curves of the intake pressure of the high-pressure cylinder, the regulating stage pressure of the high-pressure cylinder and the exhaust pressure of the high-pressure cylinder are recorded; (5) the feedback of the high-pressure intake valve is used as the input curve and the regulating stage pressure of the high-pressure cylinder is used as the output curve to identify that the volume time of the air chamber in front of the high-pressure cylinder is 0.38s. Figure 3 (6) Taking 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 volume time is identified to be 27.67s, as shown in Figure 4 shown.

[0061] The test methods for the volume time of the heat exchanger at the inlet of the intermediate pressure cylinder and the volume time of the intermediate pressure cylinder are as follows: (1) the air turbine power control mode is cut off and the valve position control mode is switched on; (2) the switch 1 is switched to the signal acquisition and generation device 4 to the actuator controller 2; (3) a 5% step of the high pressure intake valve instruction is simulated through the signal acquisition and generation device 4; (4) the waveform curves of the high pressure cylinder exhaust pressure, the intermediate pressure cylinder intake pressure and the intermediate pressure cylinder exhaust pressure are recorded; (5) the high pressure cylinder exhaust pressure is used as the input curve and the intermediate pressure cylinder intake pressure is used as the output curve to identify that the volume time of the heat exchanger at the inlet of the intermediate pressure cylinder is 1.59s. Figure 5 (6) Taking 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 volume time is identified to be 13.11s, as shown in Figure 6 shown.

[0062] The method for testing the volume time of the heat exchanger at the entrance of the low-pressure cylinder is as follows: (1) the air turbine power control mode is cut off and the valve position control mode is switched on; (2) the switch 1 is switched to the signal acquisition and generation device 4 to the actuator controller 2; (3) a 5% step of the high-pressure intake valve instruction is simulated by the signal acquisition and generation device 4; (4) the waveform curves of the exhaust pressure of the intermediate pressure cylinder and the intake pressure of the low-pressure cylinder are recorded; (5) the exhaust pressure of the intermediate pressure cylinder is used as the input curve and the intake pressure of the low-pressure cylinder is used as the output curve, and the volume time of the heat exchanger at the entrance of the low-pressure cylinder is identified to be 1.56s. Figure 7 shown.

[0063] Cut off the air turbine power control mode and switch to the valve position control mode; switch the switch 1 to the signal acquisition generating device 4 to the actuator controller 2; simulate a 5% high-pressure intake valve command step through the signal acquisition generating 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, it is necessary to check the test process and re-test the model parameters.

[0064] like Figure 8 As shown, a comparison diagram of the actual power waveform curve of the generator of the air turbine model parameter testing system and method of a large compressed air energy storage power station of the present application and the generator power curve of the test model is shown. Figure 8 It can be known that the present application provides a system and method for testing model parameters of air turbines in large-scale compressed air energy storage power stations. The curve of the model parameter test has a small deviation from the actual curve, which solves the technical problems that the prior art does not have any test on the model parameters of air turbines in large-scale compressed air energy storage power stations, and cannot accurately reflect the inherent characteristics of air turbines in large-scale compressed air energy storage power stations.

[0065] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large-scale compressed air energy storage power station air turbine model parameter testing system, including an air turbine model function 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 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 the 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 the high-pressure intake valve command and is connected to the high-pressure intake valve, and the actuator controller simultaneously sends the high-pressure intake valve command to the signal acquisition and generation device and is connected to the signal acquisition and generation device; The high-pressure air intake valve includes a high-pressure regulating valve and a high-pressure air supply valve. The high-pressure regulating valve is used to adjust the air intake amount under the rated working condition of the air turbine, and the high-pressure air supply valve is used to adjust the supplementary air intake after the air turbine exceeds the rated working condition. The high-pressure air inlet valve is connected to the high-pressure cylinder inlet heat exchanger through 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 medium-pressure cylinder inlet heat exchanger, the medium-pressure cylinder inlet heat exchanger outlet is connected to the medium-pressure main air valve, the medium-pressure main air valve is connected to the medium-pressure regulating valve, the medium-pressure regulating valve is connected to the medium-pressure cylinder, the medium-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 through a shaft.

2. A method for testing parameters of an air turbine model of a large-scale compressed air energy storage power station, using the system as claimed in claim 1, wherein the testing method includes a high-pressure cylinder output coefficient test, a medium-pressure cylinder output coefficient test, a low-pressure cylinder output coefficient test, a high-pressure cylinder inlet heat exchanger volume time test, a high-pressure cylinder front air chamber volume time test, a high-pressure cylinder volume time test, a medium-pressure cylinder inlet heat exchanger volume time test, a medium cylinder volume time test, and a low-pressure cylinder inlet heat exchanger volume time test; 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 in that: The method comprises the following steps: (1) the electrical load of the air turbine is greater than 30% of the rated load to maintain stable operation; (2) the high-pressure cylinder intake pressure, the high-pressure cylinder intake temperature, the high-pressure cylinder exhaust pressure, the high-pressure cylinder exhaust temperature, the medium-pressure cylinder intake pressure, the medium-pressure cylinder intake temperature, the medium-pressure cylinder exhaust pressure, the medium-pressure cylinder exhaust temperature, the low-pressure cylinder intake pressure, the low-pressure cylinder intake temperature, the low-pressure cylinder exhaust pressure, and the low-pressure cylinder exhaust temperature are connected to a signal acquisition generating device to collect data; (3) the enthalpy drop of the high-pressure cylinder, the medium-pressure cylinder, and the 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; The method for testing the volume time of the heat exchanger at the inlet of the high-pressure cylinder, the volume time of the air chamber in front of the high-pressure cylinder, the volume time of the high-pressure cylinder, the volume time of the medium-pressure cylinder, the volume time of the heat exchanger at the inlet of the medium-pressure cylinder, the volume time of the medium-pressure cylinder, and the volume time of the heat exchanger at the inlet of the low-pressure cylinder is characterized in that it comprises the following steps: (1) cutting off the air turbine power control mode and switching to the valve position control mode; (2) simulating the high-pressure intake valve instruction through the signal acquisition and generation device, and switching the switch to the signal acquisition and generation device to the actuator controller; (3 ) simulate a 5% high-pressure intake valve command step; (4) record 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 signal waveform data; (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.

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

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

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

6. The method for testing air turbine model parameters of a large-scale compressed air energy storage power station according to claim 2 is characterized in that: The test method for the volume time of the heat exchanger at the inlet of the high-pressure cylinder is as follows: (1) the air turbine power control mode is cut off and the valve position control mode is switched on; (2) the switching switch is switched to the signal acquisition and generation device to the actuator controller; (3) a 5% high-pressure intake valve command step is simulated through the signal acquisition and generation device; (4) the salt cavern outlet pressure and the high-pressure cylinder intake pressure waveform curves are recorded; (5) the salt cavern outlet pressure is used as the input curve and the high-pressure cylinder intake pressure is used as the output curve to identify the volume time of the heat exchanger at the inlet of the high-pressure cylinder.

7. The method for testing air turbine model parameters of a large-scale compressed air energy storage power station according to claim 2 is characterized in that: The test method for the volume time of the air chamber in front of the high-pressure cylinder is as follows: (1) cut off the air turbine power control mode and start the valve position control mode; (2) switch the switching switch to the signal acquisition and generation device to the actuator controller; (3) simulate a 5% high-pressure intake valve command step 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 high-pressure intake valve feedback as the input curve and the high-pressure cylinder regulating stage pressure as the output curve to identify the volume time of the air chamber in front 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 air turbine model parameters of a large-scale compressed air energy storage power station according to claim 2 is characterized in that: The test method for the volume time of the heat exchanger at the inlet of the intermediate pressure cylinder is as follows: (1) Cut off the air turbine power control mode and start the valve position control mode; (2) Switch the switch to the signal acquisition and generation device to the actuator controller; (3) Simulate a 5% high-pressure intake valve command step 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 volume time of the heat exchanger at the inlet 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 volume time of the intermediate pressure cylinder.

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

Images