Static parameter testing system and method for compressed air energy storage air turbine adjusting system

Abstract

The invention relates to a static parameter testing system and method for a compressed air energy storage air turbine adjusting system. The system comprises a change-over switch, an adjusting system control model, a signal collecting and generating device, a salt cavern, a salt cavern outlet stop valve, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a high-pressure cylinder inlet heat exchanger, an intermediate-pressure cylinder inlet heat exchanger, a low-pressure cylinder inlet heat exchanger, a high-pressure main air valve, a high-pressure adjusting valve, a high-pressure gulp valve, an intermediate-pressure main air valve, an intermediate-pressure adjusting valve and a low-pressure main air valve. A low-pressure cylinder exhaust valve; the test of the fastest opening time, the fastest closing time, the overshoot and the proportionality coefficient of the compressed air energy storage air turbine adjusting system can be carried out. The static parameters of the compressed air energy storage air turbine adjusting system can be tested, the static characteristics of the compressed air energy storage air turbine adjusting system are 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 static parameter testing system and method for a compressed air energy storage air turbine regulating system. Background Art

[0002] 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. The static characteristics of the compressed air energy storage air turbine regulation system are directly related to the speed regulation characteristics and variable load characteristics of the air turbine. Therefore, it is of great significance to carry out research on the static parameter test of the compressed air energy storage air turbine regulation system. However, the existing technology does not test the static parameters of the compressed air energy storage air turbine regulation system, and cannot accurately reflect the static characteristics of the compressed air energy storage air turbine regulation system. Carrying out research on the static parameter test method of the compressed air energy storage air turbine regulation system is an effective measure to ensure the safe operation of the power grid, which has important social significance and economic benefits. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a static parameter testing system and method for a compressed air energy storage air turbine regulation system, so as to solve technical problems such as the prior art does not have a test for the static parameters of the compressed air energy storage air turbine regulation system and cannot accurately reflect the static characteristics of the compressed air energy storage air turbine regulation system.

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

[0005] In the first aspect, the present application provides a static parameter test system for a compressed air energy storage air turbine regulation system, the test system comprising a switching switch, a regulation system control model, a signal acquisition generator, a salt cavern, a salt cavern outlet stop valve, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a high-pressure cylinder inlet heat exchanger, a medium-pressure cylinder inlet heat exchanger, a low-pressure cylinder inlet heat exchanger, a high-pressure main air valve, a high-pressure regulating valve, a high-pressure air supply valve, a medium-pressure main air valve, a medium-pressure regulating valve, a low-pressure main air valve, and a low-pressure cylinder exhaust valve; the regulation system control model is connected to the signal acquisition generator, and receives the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve command signals output by the signal acquisition generator; the regulation system control model outputs the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve commands and is connected to the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve; the regulation system control model simultaneously outputs the opening of the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve to the signal acquisition generator;

[0006] The high-pressure main gas valve is connected to the high-pressure cylinder inlet heat exchanger, and the high-pressure cylinder inlet heat exchanger is connected to the salt cavern outlet through the salt cavern outlet stop valve;

[0007] The high-pressure main air valve is connected to the high-pressure cylinder through a high-pressure regulating valve and a high-pressure air supply valve, 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, and the low-pressure cylinder outlet is connected to the atmosphere through the low-pressure cylinder exhaust valve.

[0008] In a second aspect, the present application provides a method for testing static parameters of a compressed air energy storage air turbine regulating system, using the system as described above, the testing method comprises the following steps:

[0009] (1) Close the salt cavern outlet stop valve and tighten it manually to ensure that the salt cavern outlet stop valve is tight and leak-free;

[0010] (2) The heat exchangers at the high-pressure cylinder inlet, the medium-pressure cylinder inlet, and the low-pressure cylinder inlet are out of operation;

[0011] (3) Open the exhaust valve of the low-pressure cylinder to release the residual pressure in the air turbine. During the test, the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder remain unpressurized;

[0012] (4) The air turbine is shut off, and the high-pressure main air valve, medium-pressure main air valve, and low-pressure main air valve are kept fully closed to prevent air from entering the air turbine;

[0013] (5) simulating the high-pressure regulating valve command through the signal acquisition and generation device, and switching the switch to the signal acquisition and generation device to the regulation system control model;

[0014] (6) Simulate the high-pressure regulating valve command step, and conduct 0%-100%, 100%-0%, 20%-25%, 25%-20%, 20%-30%, 30%-20%, 20%-50%, 50%-20% step tests in sequence. During the test, closely monitor the air turbine speed. If the air turbine speed starts to rise, the brake should be opened immediately to terminate the test;

[0015] (7) Recording the high-pressure regulating valve opening waveform curve through a signal acquisition and generation device;

[0016] (8) Calculate the fastest opening time, the fastest closing time and the overshoot of the high-pressure regulating valve;

[0017] (9) Identify the proportionality coefficient of the high-pressure regulating valve according to the calculated fastest opening time, fastest closing time and the high-pressure regulating valve opening waveform curve;

[0018] (10) Repeat steps (5) to (9) to perform static parameter tests on the high-pressure air supply valve and the medium-pressure regulating valve in turn.

[0019] According to the waveform curve of the 0%-100% step test, the fastest opening time is calculated as follows:

[0020] T o =(t 2 -t 1 )×10

[0021] Among them, T o is the fastest opening time, t 2 The time for the regulating valve to open to 55%, t 1 The time when the regulating valve is open to 45%.

[0022] According to the waveform curve of the 100%-0% step test, the fastest closing time is calculated as follows:

[0023] T c =(t' 2 -t' 1 )×10

[0024] Among them, T c is the fastest closing time, t' 2 The time for the regulating valve to close to 45%, t' 1 The time it takes for the regulating valve to close to 55%.

[0025] The calculation method of overshoot is:

[0026]

[0027] Among them, ΔP is the overshoot, P max is the maximum value of the regulating valve, P 0 is the steady-state value of the control valve.

[0028] The proportional coefficient calculation method of the high-pressure regulating valve, the high-pressure air supply valve and the medium-pressure regulating valve is as follows: according to the calculated fastest opening time, fastest closing time and regulating valve opening waveform curve of the high-pressure regulating valve, the high-pressure air supply valve and the medium-pressure regulating valve, the proportional coefficients of the high-pressure regulating valve, the high-pressure air supply valve and the medium-pressure regulating valve are identified respectively.

[0029] Compared with the prior art, the beneficial effects of the present invention are: the present invention tests the static parameters of the compressed air energy storage air turbine regulation system through a step test, providing a basis for the study of the speed regulation characteristics and variable load characteristics of the air turbine; it solves the technical problems that the prior art does not have a test for the static parameters of the compressed air energy storage air turbine regulation system and cannot accurately reflect the static characteristics of the compressed air energy storage air turbine regulation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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.

[0031] Figure 1 It is a schematic diagram of the system structure of this application.

[0032] Figure 2 It is the control model diagram of the regulation system of this application.

[0033] Figure 3 It is a comparison diagram of the actual waveform curve of the high-pressure regulating valve of the present application and the high-pressure regulating valve curve of the test model.

[0034] Figure 1 In: 1-switching switch, 2-regulating system control model, 3-signal acquisition generating device, 4-salt cavern, 5-salt cavern outlet stop valve, 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-low-pressure cylinder exhaust valve. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Compressed air energy storage is a new type of efficient and sustainable energy storage method. The existing technology does not test the static parameters of the compressed air energy storage air turbine regulation system, and cannot accurately reflect the static characteristics of the compressed air energy storage air turbine regulation system. It is of great practical significance to carry out research on the static parameter testing method of the compressed air energy storage air turbine regulation system.

[0039] like Figure 1 As shown, the present invention proposes a static parameter testing system and method for a compressed air energy storage air turbine regulation system. Through a step test, the static parameters of the compressed air energy storage air turbine regulation system are tested, providing a basis for the research on the speed regulation characteristics and variable load characteristics of the air turbine; it solves the technical problems that the prior art does not have a test for the static parameters of the compressed air energy storage air turbine regulation system and cannot accurately reflect the static characteristics of the compressed air energy storage air turbine regulation system.

[0040] like Figure 1 As shown, the present invention proposes a static parameter test system for a compressed air energy storage air turbine regulation system, the test system comprising a switching switch 1, a regulation system control model 2, a signal acquisition generating device 3, a salt cavern 4, a salt cavern outlet stop valve 5, a high-pressure cylinder 10, a medium-pressure cylinder 14, a low-pressure cylinder 17, a high-pressure cylinder inlet heat exchanger 6, a medium-pressure cylinder inlet heat exchanger 11, a low-pressure cylinder inlet heat exchanger 15, a high-pressure main air valve 7, a high-pressure regulating valve 8, a high-pressure air supply valve 9, a medium-pressure main air valve 12, a medium-pressure regulating valve 13, a low-pressure main air valve 16, a low-pressure cylinder The pressure cylinder exhaust valve 18; the regulating system control model 2 is connected to the signal acquisition and generation device 3, and receives the command signals of the high-pressure regulating valve 8, the high-pressure air supply valve 9, and the medium-pressure regulating valve 13 output by the signal acquisition and generation device 3; the regulating system control model 2 outputs the high-pressure regulating valve 8, the high-pressure air supply valve 9, and the medium-pressure regulating valve 13 commands and is connected to the high-pressure regulating valve 8, the high-pressure air supply valve 9, and the medium-pressure regulating valve 13; the regulating system control model 2 simultaneously outputs the opening of the high-pressure regulating valve 8, the high-pressure air supply valve 9, and the medium-pressure regulating valve 13 to the signal acquisition and generation device 3;

[0041] The high-pressure main gas valve 7 is connected to the high-pressure cylinder inlet heat exchanger 6, and the high-pressure cylinder inlet heat exchanger 6 is connected to the salt cavern 4 outlet through the salt cavern outlet stop valve 5;

[0042] The high-pressure main air valve 7 is connected to the high-pressure cylinder 10 through the high-pressure regulating valve 8 and the high-pressure air supplement valve 9. 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 through the low-pressure cylinder exhaust valve 18.

[0043] The control model of the regulation system is as follows: Figure 2 , where P CV Instructions for high pressure regulating valve 8, high pressure air supply valve 9, and medium pressure regulating valve 13, T o is the fastest opening time, T c is the fastest closing time, P GV It is the opening degree of the high-pressure regulating valve 8, the high-pressure air supply valve 9, and the medium-pressure regulating valve 13.

[0044] A method for testing static parameters of a compressed air energy storage air turbine regulating system, using the system as described above, the testing method comprises the following steps:

[0045] (1) Close the salt cavern outlet stop valve 5 and tighten it manually to ensure that the salt cavern outlet stop valve 5 is tight and leak-free;

[0046] (2) The high-pressure cylinder inlet heat exchanger 6, the medium-pressure cylinder inlet heat exchanger 11, and the low-pressure cylinder inlet heat exchanger 15 are out of operation;

[0047] (3) Open the low-pressure cylinder exhaust valve 18 to release the residual pressure in the air turbine. During the test, the high-pressure cylinder 10, the medium-pressure cylinder 14, and the low-pressure cylinder 17 remain in a non-pressurized state;

[0048] (4) The air turbine is locked, and the high-pressure main air valve 7, the medium-pressure main air valve 12, and the low-pressure main air valve 16 are kept fully closed to prevent the air turbine from taking in air;

[0049] (5) Simulating the high pressure regulating valve 8 instruction through the signal acquisition generating device 3, switching the switch 1 to the signal acquisition generating device 3 to the regulating system control model 2;

[0050] (6) Simulate the command step of the high-pressure regulating valve 8, and perform 0%-100%, 100%-0%, 20%-25%, 25%-20%, 20%-30%, 30%-20%, 20%-50%, 50%-20% step tests in sequence. During the test, closely monitor the air turbine speed. If the air turbine speed starts to rise, the brake should be opened immediately to terminate the test;

[0051] (7) recording the opening waveform curve of the high-pressure regulating valve 8 through the signal acquisition and generation device 3;

[0052] (8) Calculate the fastest opening time, the fastest closing time and the overshoot of the high-pressure regulating valve 8;

[0053] (9) Identify the proportionality coefficient of the high-pressure regulating valve 8 based on the calculated fastest opening time, fastest closing time and the opening waveform curve of the high-pressure regulating valve 8;

[0054] (10) Repeat steps (5) to (9) to perform static parameter tests on the high-pressure air supply valve 9 and the medium-pressure regulating valve 13 in sequence.

[0055] According to the waveform curve of the 0%-100% step test, the fastest opening time of the high-pressure regulating valve is 2.05s:

[0056] T o =(t 2 -t 1 )×10=(12.367-12.162)×10=2.05

[0057] Among them, T o is the fastest opening time, t 2 The time when the high pressure regulating valve opens to 55%, t 1 The time when the high pressure regulating valve is opened to 45%.

[0058] According to the waveform curve of the 100%-0% step test, the fastest closing time of the high-pressure regulating valve is 1.88s:

[0059] T c =(t' 2 -t' 1 )×10=(51.090-50.902)×10=1.88

[0060] Among them, T c is the fastest closing time, t' 2 The time when the high pressure regulating valve is closed to 45%, t' 1 The time when the high pressure regulating valve is closed to 55%.

[0061] The overshoot of the high pressure regulating valve is 6%:

[0062]

[0063] Among them, ΔP is the overshoot, P max is the maximum value of the high pressure regulating valve, P 0 is the steady-state value of the high-pressure regulating valve.

[0064] The proportional coefficient calculation method of the high-pressure regulating valve 8 is as follows: based on the calculated fastest opening time, fastest closing time and opening waveform curve of the high-pressure regulating valve 8, the proportional coefficient of the high-pressure regulating valve 8 is identified to be 28.11.

[0065] like Figure 3 As shown, a comparison diagram of the actual waveform curve of the high-pressure regulating valve of a compressed air energy storage air turbine regulating system static parameter testing system and method of the present application and the high-pressure regulating valve curve of the test model is shown in FIG. Figure 3 It can be known that the present application provides a static parameter testing system and method for a compressed air energy storage air turbine regulating system. 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 a test for the static parameters of the compressed air energy storage air turbine regulating system and cannot accurately reflect the static characteristics of the compressed air energy storage air turbine regulating system.

[0066] 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 static parameter test system for a compressed air energy storage air turbine regulating system, characterized in that: It includes a switching switch, a control model of a regulating system, a signal acquisition and generation device, a salt cavern, a stop valve at a salt cavern outlet, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a heat exchanger at a high-pressure cylinder inlet, a heat exchanger at a medium-pressure cylinder inlet, a heat exchanger at a low-pressure cylinder inlet, a high-pressure main air valve, a high-pressure regulating valve, a high-pressure air supply valve, a medium-pressure main air valve, a medium-pressure regulating valve, a low-pressure main air valve, and a low-pressure cylinder exhaust valve; the control model of the regulating system is connected to the signal acquisition and generation device, and receives command signals of the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve output by the signal acquisition and generation device; the control model of the regulating system outputs commands of the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve, and is connected to the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve; the control model of the regulating system simultaneously outputs the opening of the high-pressure regulating valve, the high-pressure air supply valve, and the medium-pressure regulating valve to the signal acquisition and generation device; The high-pressure main gas valve is connected to the high-pressure cylinder inlet heat exchanger, and the high-pressure cylinder inlet heat exchanger is connected to the salt cavern outlet through the salt cavern outlet stop valve; The high-pressure main air valve is connected to the high-pressure cylinder through a high-pressure regulating valve and a high-pressure air supply valve, 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, and the low-pressure cylinder outlet is connected to the atmosphere through the low-pressure cylinder exhaust valve.

2. A method for testing static parameters of a compressed air energy storage air turbine regulating system, using the system as claimed in claim 1, the testing method comprising the following steps: (1) Close the salt cavern outlet stop valve and tighten it manually to ensure that the salt cavern outlet stop valve is tight and leak-free; (2) The heat exchangers at the high-pressure cylinder inlet, the medium-pressure cylinder inlet, and the low-pressure cylinder inlet are out of operation; (3) Open the exhaust valve of the low-pressure cylinder to release the residual pressure in the air turbine. During the test, the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder remain unpressurized; (4) The air turbine is shut off, and the high-pressure main air valve, medium-pressure main air valve, and low-pressure main air valve are kept fully closed to prevent air from entering the air turbine; (5) simulating the high-pressure regulating valve command through the signal acquisition and generation device, and switching the switch to the signal acquisition and generation device to the regulation system control model; (6) Simulate the high-pressure regulating valve command step, and conduct 0%-100%, 100%-0%, 20%-25%, 25%-20%, 20%-30%, 30%-20%, 20%-50%, 50%-20% step tests in sequence. During the test, closely monitor the air turbine speed. If the air turbine speed starts to rise, the brake should be opened immediately to terminate the test; (7) Recording the high-pressure regulating valve opening waveform curve through a signal acquisition and generation device; (8) Calculate the fastest opening time, the fastest closing time and the overshoot of the high-pressure regulating valve; (9) Identify the proportionality coefficient of the high-pressure regulating valve according to the calculated fastest opening time, fastest closing time and the high-pressure regulating valve opening waveform curve; (10) Repeat steps (5) to (9) to perform static parameter tests on the high-pressure air supply valve and the medium-pressure regulating valve in turn.

3. A static parameter testing method for a compressed air energy storage air turbine regulating system according to claim 2, characterized in that: According to the waveform curve of the 0%-100% step test, the fastest opening time is calculated as follows: T o =(t2-t1)×10 Among them, T o is the fastest opening time, t2 is the time when the regulating valve opens to 55%, and t1 is the time when the regulating valve opens to 45%.

4. A method for testing static parameters of a compressed air energy storage air turbine regulating system according to claim 2, characterized in that: According to the waveform curve of the 100%-0% step test, the fastest closing time is calculated as follows: T c =(t'2-t'1)×10 Among them, T c is the fastest closing time, t'2 is the time when the regulating valve is closed to 45%, and t'1 is the time when the regulating valve is closed to 55%.

5. A method for testing static parameters of a compressed air energy storage air turbine regulating system according to claim 2, characterized in that: The calculation method of overshoot is: Among them, ΔP is the overshoot, P max is the maximum value of the regulating valve, and P0 is the steady-state value of the regulating valve.

6. A method for testing static parameters of a compressed air energy storage air turbine regulating system according to claim 2, characterized in that: The proportional coefficient calculation method of the high-pressure regulating valve, the high-pressure air supply valve and the medium-pressure regulating valve is as follows: according to the calculated fastest opening time, fastest closing time and regulating valve opening waveform curve of the high-pressure regulating valve, the high-pressure air supply valve and the medium-pressure regulating valve, the proportional coefficients of the high-pressure regulating valve, the high-pressure air supply valve and the medium-pressure regulating valve are identified respectively.

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