Control method, system, and program product for nuclear power loca test device

Abstract

The present disclosure provides a control method, system and program product of a nuclear power LOCA test device, the device comprising: a steam generator, a test bin, an energy storage tank and a steam energy storage tank; the steam generator is connected with the energy storage tank, the energy storage tank is connected with the steam energy storage tank, and the steam energy storage tank is connected with the test bin; the steam generator is also connected with the test bin; the inside of the energy storage tank, the steam energy storage tank and the test bin are all provided with temperature sensors and pressure sensors; the control method comprises: obtaining the energy storage tank pressure, the energy storage tank temperature, the steam energy storage tank pressure, the steam energy storage tank temperature, the test bin pressure and the test bin temperature through the temperature sensors and the pressure sensors; and controlling the opening and closing state and the opening degree of each valve according to the energy storage tank pressure, the energy storage tank temperature, the steam energy storage tank pressure, the steam energy storage tank temperature, the test bin pressure and the test bin temperature. The present disclosure realizes dynamic adjustment of the test bin pressure and temperature by adjusting the opening degree of each valve for pressure reduction, and quickly responds to and adapts to various environments.

Description

Technical Field

[0001] This disclosure relates to the field of nuclear reactor safety testing technology, and in particular to a control method, system and program product for a nuclear power plant LOCA testing device. Background Technology

[0002] LOCA (Loss of Coolant Accident) is a key test scenario in nuclear reactor safety analysis, requiring the simulation of coolant loss to verify the emergency response capabilities of safety systems. Existing LOCA test systems suffer from the following problems:

[0003] 1. Low control accuracy: Traditional PID (proportional-integral-derivative) control is difficult to cope with nonlinear and time-varying test environments, resulting in large pressure / temperature fluctuations.

[0004] 2. Poor module coordination: Subsystems such as pressure and temperature operate independently, lacking global optimization, which can easily lead to parameter conflicts.

[0005] 3. Data integration lag: Experimental data is scattered and difficult to analyze in real time and feed back to the control system.

[0006] 4. Excessive manual control during the experiment.

[0007] 5. The problem of instantaneous heating and instantaneous pressure increase results in a very low success rate for experiments.

[0008] 6. It cannot maintain high temperature and high pressure for a long time.

[0009] 7. Unable to achieve high temperature and high pressure environments.

[0010] During the LOCA test, the relevant equipment needs to be manually operated to achieve the target temperature and pressure. However, manual control has poor stability and a high risk of test failure. Summary of the Invention

[0011] The technical problem to be solved by this disclosure is to overcome the above-mentioned defects in the prior art and to provide a control method, system and program product for a nuclear power LOCA test device.

[0012] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0013] This disclosure provides a control method for a nuclear power LOCA test apparatus, the nuclear power LOCA test apparatus comprising: a steam generator, a test chamber, at least one energy storage tank, and at least one steam energy storage tank;

[0014] The steam generator is connected to the energy storage tank, the energy storage tank is connected to the steam energy storage tank, and the steam energy storage tank is connected to the test chamber;

[0015] The steam generator is also connected to the test chamber;

[0016] At least one valve is provided at the outlet of the steam generator, the energy storage tank, the steam energy storage tank, and the test chamber;

[0017] The energy storage tank, the steam energy storage tank, and the test chamber are all equipped with at least one temperature sensor and at least one pressure sensor.

[0018] The control method for the nuclear power LOCA test device includes:

[0019] The energy storage tank pressure, energy storage tank temperature, steam energy storage tank pressure, steam energy storage tank temperature, test chamber pressure, and test chamber temperature are obtained through the temperature sensor and the pressure sensor.

[0020] The opening and closing status and degree of each valve are controlled according to the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, so that the pressure of the test chamber changes according to the preset pressure target curve and the temperature of the test chamber changes according to the preset temperature target curve.

[0021] Optionally, the valve includes an electric valve, a regulating valve, and a pneumatic valve;

[0022] The steam generator is provided with a first pipeline at its outlet; the first pipeline includes a first electric valve and a first regulating valve connected in series.

[0023] A pneumatic valve is installed at the outlet of the energy storage tank;

[0024] A second electric valve is installed at the inlet of the energy storage tank;

[0025] The inlet of the second electric valve is connected to the outlet of the first pipeline;

[0026] The number of energy storage tanks is two or more;

[0027] A second pipeline is provided at the outlet of one of the energy storage tanks; the second pipeline includes a first pneumatic valve and a second regulating valve connected in series;

[0028] The outlets of the remaining energy storage tanks are equipped with a third pipeline; the third pipeline includes a second pneumatic valve and a third electric valve connected in series;

[0029] The outlets of the second pipeline and the third pipeline are both connected to the inlet of each of the steam storage tanks;

[0030] Each of the steam storage tanks is connected to the test chamber via at least one fourth pipeline; each fourth pipeline plate includes a third pneumatic valve;

[0031] The inlet of the test chamber is connected to the outlet of the first pipeline via a fifth pipeline; the fifth pipeline includes a third regulating valve.

[0032] A sixth pipeline is installed at the outlet of the test chamber; the sixth pipeline includes a fifth electric valve and a fourth regulating valve connected in series;

[0033] Inside the test chamber, there are two or more temperature sensors and two or more pressure sensors.

[0034] Both the energy storage tank and the steam energy storage tank are equipped with heating devices;

[0035] Nuclear power plant LOCA tests consist of a steam preparation phase, a transient phase, and a steady-state phase, conducted sequentially.

[0036] The method of controlling the opening and closing status and degree of each valve based on the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, and the test chamber temperature includes:

[0037] During the steam preparation stage, the first electric valve, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, the first regulating valve, and the second regulating valve are opened. The opening degree of the first regulating valve is controlled according to the pressure of the energy storage tank, and the opening degree of the second regulating valve is controlled according to the pressure of the steam energy storage tank.

[0038] During the transient phase, the fourth electric valve and the third pneumatic valve are opened, and the opening degree of the first regulating valve, the second regulating valve, and the fourth regulating valve is controlled according to the test chamber pressure and the test chamber temperature.

[0039] During the steady-state phase, in response to the test chamber temperature falling below a preset first threshold, the heating equipment of the energy storage tank and the steam energy storage tank is shut down, and the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, and the second regulating valve are shut down, as are the fourth electric valve and the third pneumatic valve; the opening degree of the third regulating valve and the fourth regulating valve is controlled according to the test chamber pressure and the test chamber temperature.

[0040] Optionally, controlling the opening of the first regulating valve based on the pressure of the energy storage tank, and controlling the opening of the second regulating valve based on the pressure of the steam energy storage tank, includes:

[0041] The pressure deviation between the current expected pressure of the energy storage tank and the pressure of the energy storage tank is calculated, and the pressure deviation between the current expected pressure of the steam energy storage tank and the pressure of the steam energy storage tank is calculated; wherein, the expected pressure of the energy storage tank and the test time have a preset first functional relationship, and the expected pressure of the steam energy storage tank and the test time have a preset second functional relationship.

[0042] The first target opening degree of the first regulating valve is calculated based on the pressure deviation of the energy storage tank and the preset first oversight function, and the opening degree of the first regulating valve is controlled to be the first target opening degree.

[0043] The second target opening degree of the second regulating valve is calculated based on the pressure deviation of the steam storage tank and the preset second overdrive function, and the opening degree of the second regulating valve is controlled to be the second target opening degree.

[0044] Optionally, controlling the opening degrees of the first regulating valve, the second regulating valve, and the fourth regulating valve based on the test chamber pressure and the test chamber temperature includes:

[0045] The test chamber pressure deviation between the current expected pressure and the test chamber pressure is calculated, and the test chamber temperature deviation between the current expected temperature and the test chamber temperature is calculated; wherein, the expected pressure and test time have a preset third functional relationship, and the expected temperature and test time have a preset fourth functional relationship.

[0046] The first minimum opening degree of the first regulating valve is calculated based on the pressure deviation of the test chamber and a preset third overdrive function. The third target opening degree of the first regulating valve is calculated based on the temperature deviation of the test chamber and a preset first PID function. The opening degree of the first regulating valve is controlled to be the third target opening degree. Wherein, the third target opening degree is greater than or equal to the first minimum opening degree.

[0047] The second minimum opening degree of the second regulating valve is calculated based on the pressure deviation of the test chamber and the preset fourth overdrive function. The fourth target opening degree of the second regulating valve is calculated based on the temperature deviation of the test chamber and the preset second PID function. The opening degree of the second regulating valve is controlled to be the fourth target opening degree. Wherein, the fourth target opening degree is greater than or equal to the second minimum opening degree.

[0048] The fifth target opening degree of the fourth regulating valve is calculated based on the pressure deviation of the test chamber and the preset fifth overdrive function, and the opening degree of the fourth regulating valve is controlled to be the fifth target opening degree.

[0049] Optionally, controlling the opening of the third and fourth regulating valves based on the test chamber pressure and the test chamber temperature includes:

[0050] The test chamber pressure deviation between the current expected pressure and the test chamber pressure is calculated, and the test chamber temperature deviation between the current expected temperature and the test chamber temperature is calculated; wherein, the expected pressure and test time have a preset third functional relationship, and the expected temperature and test time have a preset fourth functional relationship.

[0051] The sixth target opening degree of the third regulating valve is calculated based on the temperature deviation of the test chamber and the preset third PID function, and the opening degree of the third regulating valve is controlled to be the sixth target opening degree.

[0052] The seventh target opening degree of the fourth regulating valve is calculated based on the pressure deviation of the test chamber and the preset sixth overdrive function, and the opening degree of the fourth regulating valve is controlled to be the seventh target opening degree.

[0053] This disclosure also provides a control system for a nuclear power LOCA test apparatus, the nuclear power LOCA test apparatus comprising: a steam generator, a test chamber, at least one energy storage tank, and at least one steam energy storage tank;

[0054] The steam generator is connected to the energy storage tank, the energy storage tank is connected to the steam energy storage tank, and the steam energy storage tank is connected to the test chamber;

[0055] The steam generator is also connected to the test chamber;

[0056] At least one valve is provided at the outlet of the steam generator, the energy storage tank, the steam energy storage tank, and the test chamber;

[0057] The energy storage tank, the steam energy storage tank, and the test chamber are all equipped with at least one temperature sensor and at least one pressure sensor.

[0058] The control system of the nuclear power LOCA test device includes: a data acquisition and processing module and a pressure and temperature control module;

[0059] The data acquisition and processing module is used to acquire the energy storage tank pressure, energy storage tank temperature, steam energy storage tank pressure, steam energy storage tank temperature, test chamber pressure, and test chamber temperature through the temperature sensor and the pressure sensor.

[0060] The pressure and temperature control module is used to control the opening and closing status and degree of each valve according to the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, so that the pressure of the test chamber changes according to the preset pressure target curve and the temperature of the test chamber changes according to the preset temperature target curve.

[0061] Optionally, the valve includes an electric valve, a regulating valve, and a pneumatic valve;

[0062] The steam generator is provided with a first pipeline at its outlet; the first pipeline includes a first electric valve and a first regulating valve connected in series.

[0063] A pneumatic valve is installed at the outlet of the energy storage tank;

[0064] A second electric valve is installed at the inlet of the energy storage tank;

[0065] The inlet of the second electric valve is connected to the outlet of the first pipeline;

[0066] The number of energy storage tanks is two or more;

[0067] A second pipeline is provided at the outlet of one of the energy storage tanks; the second pipeline includes a first pneumatic valve and a second regulating valve connected in series;

[0068] The outlets of the remaining energy storage tanks are equipped with a third pipeline; the third pipeline includes a second pneumatic valve and a third electric valve connected in series;

[0069] The outlets of the second pipeline and the third pipeline are both connected to the inlet of each of the steam storage tanks;

[0070] Each of the steam storage tanks is connected to the test chamber via at least one fourth pipeline; each fourth pipeline plate includes a third pneumatic valve;

[0071] The inlet of the test chamber is connected to the outlet of the first pipeline via a fifth pipeline; the fifth pipeline includes a third regulating valve.

[0072] A sixth pipeline is installed at the outlet of the test chamber; the sixth pipeline includes a fifth electric valve and a fourth regulating valve connected in series;

[0073] Inside the test chamber, there are two or more temperature sensors and two or more pressure sensors.

[0074] Both the energy storage tank and the steam energy storage tank are equipped with heating devices;

[0075] Nuclear power plant LOCA tests consist of a steam preparation phase, a transient phase, and a steady-state phase, conducted sequentially.

[0076] The pressure and temperature control module is also used in the steam preparation stage to open the first electric valve, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, the first regulating valve, and the second regulating valve, and to control the opening degree of the first regulating valve according to the pressure of the energy storage tank, and to control the opening degree of the second regulating valve according to the pressure of the steam energy storage tank.

[0077] The pressure and temperature control module is also used to open the fourth electric valve and the third pneumatic valve during the transient phase, and to control the opening degree of the first regulating valve, the second regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature;

[0078] The pressure and temperature control module is also used to, in the steady state phase, in response to the test chamber temperature being lower than a preset first threshold, shut down the heating equipment of the energy storage tank and the steam energy storage tank, shut down the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve and the second regulating valve, and shut down the fourth electric valve and the third pneumatic valve; and control the opening degree of the third regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature.

[0079] Optionally, the pressure and temperature control module is further configured to calculate the pressure deviation between the current expected pressure of the energy storage tank and the pressure of the energy storage tank, and to calculate the pressure deviation between the current expected pressure of the steam energy storage tank and the pressure of the steam energy storage tank; wherein the expected pressure of the energy storage tank and the test time are in a preset first functional relationship, and the expected pressure of the steam energy storage tank and the test time are in a preset second functional relationship.

[0080] The pressure and temperature control module is also used to calculate the first target opening degree of the first regulating valve based on the pressure deviation of the energy storage tank and the preset first overdrive function, and control the opening degree of the first regulating valve to be the first target opening degree.

[0081] The pressure and temperature control module is also used to calculate the second target opening degree of the second regulating valve based on the pressure deviation of the steam storage tank and the preset second overdrive function, and control the opening degree of the second regulating valve to be the second target opening degree;

[0082] And / or,

[0083] The pressure and temperature control module is also used to calculate the test chamber pressure deviation between the current expected pressure of the test chamber and the test chamber pressure, and to calculate the test chamber temperature deviation between the current expected temperature of the test chamber and the test chamber temperature; wherein, the expected pressure of the test chamber and the test time are related by a preset third function, and the expected temperature of the test chamber and the test time are related by a preset fourth function.

[0084] The pressure and temperature control module is further configured to calculate the first minimum opening degree of the first regulating valve based on the pressure deviation of the test chamber and a preset third overdrive function, calculate the third target opening degree of the first regulating valve based on the temperature deviation of the test chamber and a preset first PID function, and control the opening degree of the first regulating valve to be the third target opening degree; wherein, the third target opening degree is greater than or equal to the first minimum opening degree;

[0085] The pressure and temperature control module is further configured to calculate the second minimum opening degree of the second regulating valve based on the pressure deviation of the test chamber and a preset fourth overdrive function, calculate the fourth target opening degree of the second regulating valve based on the temperature deviation of the test chamber and a preset second PID function, and control the opening degree of the second regulating valve to be the fourth target opening degree; wherein, the fourth target opening degree is greater than or equal to the second minimum opening degree;

[0086] The pressure and temperature control module is also used to calculate the fifth target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset fifth overdrive function, and control the opening degree of the fourth regulating valve to be the fifth target opening degree;

[0087] And / or,

[0088] The pressure and temperature control module is also used to calculate the test chamber pressure deviation between the current expected pressure of the test chamber and the test chamber pressure, and to calculate the test chamber temperature deviation between the current expected temperature of the test chamber and the test chamber temperature; wherein, the expected pressure of the test chamber and the test time are related by a preset third function, and the expected temperature of the test chamber and the test time are related by a preset fourth function.

[0089] The pressure and temperature control module is also used to calculate the sixth target opening degree of the third regulating valve based on the temperature deviation of the test chamber and the preset third PID function, and control the opening degree of the third regulating valve to be the sixth target opening degree.

[0090] The pressure and temperature control module is also used to calculate the seventh target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset sixth overdrive function, and control the opening degree of the fourth regulating valve to be the seventh target opening degree.

[0091] This disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and used to run on the processor, wherein the processor executes the computer program to implement the aforementioned control method for the nuclear power LOCA test apparatus.

[0092] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the aforementioned control method for the nuclear power LOCA test apparatus.

[0093] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0094] The positive and progressive effects of this disclosure are as follows: By adjusting the opening degree of each pressure-reducing valve, the pressure and temperature of the test chamber can be dynamically adjusted, realizing the self-tuning capability of dynamic parameters and automated control, enabling process-oriented and standardized control of the entire test process; the pressure / temperature target curve is determined by the functional relationship obtained from real data, which reflects the test target corresponding to different test times (moments), thus decomposing the complex pressure-temperature-flow coupling relationship, and then adjusting the opening degree of the corresponding valve by calculating the target opening degree, which can cope with nonlinear and complex time-varying systems, improve the accuracy and precision of temperature and pressure control, reduce test errors, and improve the determinism of the test; it enhances anti-interference and robustness, reduces manual parameter tuning, improves response speed, and can quickly adapt to various environments. Attached Figure Description

[0095] Figure 1 A schematic diagram of the structure of a nuclear power LOCA test apparatus, which is a control method for a nuclear power LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0096] Figure 2 A flowchart of a control method for a nuclear power plant LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0097] Figure 3 A flowchart illustrating a specific implementation of step S12 of a control method for a nuclear power plant LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0098] Figure 4 A flowchart illustrating a specific implementation of step S121 of a control method for a nuclear power plant LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0099] Figure 5 A flowchart illustrating a specific implementation of step S122 of a control method for a nuclear power plant LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0100] Figure 6A flowchart illustrating a specific implementation of step S123 of a control method for a nuclear power plant LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0101] Figure 7 A flowchart illustrating partial data examples of the pressure target curve and temperature target curve of a control method for a nuclear power LOCA test apparatus provided in Embodiment 1 of this disclosure;

[0102] Figure 8 A schematic diagram of the control system of a nuclear power LOCA test apparatus provided in Embodiment 2 of this disclosure;

[0103] Figure 9 This is a schematic diagram of the structure of an electronic device provided in Embodiment 3 of this disclosure. Detailed Implementation

[0104] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0105] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0106] Example 1

[0107] Reference Figure 1 The nuclear power LOCA test apparatus includes: a steam generator 1, a test chamber 2, at least one energy storage tank 3, and at least one steam energy storage tank 4. Figure 1 A triangle indicates an electric valve, a circle indicates a regulating valve, a diamond indicates a pneumatic valve, strings starting with "TE" indicate temperature sensors, and strings starting with "PT" indicate pressure sensors.

[0108] Steam generator 1 is connected to energy storage tank 3, energy storage tank 3 is connected to steam energy storage tank 4, and steam energy storage tank 4 is connected to test chamber 2.

[0109] Steam generator 1 is also connected to test chamber 2.

[0110] At least one valve is installed at the outlet of each of the steam generator 1, energy storage tank 3, steam energy storage tank 4 and test chamber 2.

[0111] The energy storage tank 3, the steam energy storage tank 4, and the test chamber 2 are each equipped with at least one temperature sensor and at least one pressure sensor.

[0112] Figure 2 A flowchart illustrating a control method for a nuclear power plant LOCA test apparatus, provided as an exemplary embodiment of this disclosure, is included. The control method for the nuclear power plant LOCA test apparatus includes:

[0113] S11. Obtain the pressure and temperature of the energy storage tank, the steam energy storage tank, the test chamber pressure, and the test chamber temperature through temperature and pressure sensors.

[0114] S12. Control the opening and closing status and degree of each valve according to the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, so that the pressure of the test chamber changes according to the preset pressure target curve and the temperature of the test chamber changes according to the preset temperature target curve.

[0115] The LOCA test requires simulating high temperature and high pressure (around 250 degrees Celsius and 500 kPa), with simultaneous abrupt changes in temperature and pressure. The maximum temperature rise rate is 110 degrees Celsius per second, and the maximum pressure rise rate is 225 kPa per second, reaching the highest temperature and pressure in approximately 10 seconds. Achieving such high temperature and high pressure is already difficult, and to achieve such sudden temperature and pressure changes requires coordinated control of temperature and pressure. Therefore, to meet these test requirements, the requirements for temperature, pressure, and gas storage volume are very high. In this situation, the success rate of manual testing is very low, which greatly affects the test.

[0116] The obtained energy storage tank pressure, energy storage tank temperature, steam energy storage tank pressure, steam energy storage tank temperature, test chamber pressure, and test chamber temperature can be the average, maximum, or minimum values ​​of data collected by the same type of sensors set in the same component. Alternatively, data from one sensor can be used while other sensors of the same type in the same component are used as backups. This can be set according to the actual situation.

[0117] Both the pressure target curve and the temperature target curve are functions of the test time (moment), representing the functional relationship between the test time and the expected pressure / temperature of the test chamber obtained from real data. Both the pressure target curve and the temperature target curve can be segmented and represented by several sub-functions.

[0118] The nuclear power LOCA test device and its control method in this embodiment can achieve both high temperature and high pressure, as well as simultaneous abrupt changes in temperature and pressure. Within a limited reaction time, the heating rate reaches 110 degrees Celsius per second and the pressure rise rate reaches 225 kPa, ensuring that the temperature and pressure of the test chamber can stably meet the test requirements. This enables automatic test control, improves the success rate of the test, saves resources during the test, and reduces manual operation.

[0119] In this embodiment, the pressure and temperature of the test chamber are dynamically adjusted by changing the opening degree of each pressure-reducing valve. This achieves dynamic parameter self-tuning capability and automated control, enabling streamlined and standardized control of the entire test process. The pressure / temperature target curve is determined using a functional relationship obtained from real data. This target curve reflects the test objectives corresponding to different test times (moments), breaking down the complex pressure-temperature-flow coupling relationship. Furthermore, the opening degree of the corresponding valve is adjusted by calculating the target opening degree, addressing nonlinear and complex time-varying systems. This improves the precision and accuracy of temperature and pressure control, reduces test errors, and enhances test determinism. It also strengthens anti-interference and robustness, reduces manual parameter tuning, improves response speed, and allows for rapid adaptation to various environments.

[0120] In an optional embodiment, refer to Figure 1 Valves include electric valves, regulating valves, and pneumatic valves.

[0121] A first pipeline is provided at the outlet of steam generator 1. The first pipeline includes a first electric valve (MV0021) and a first regulating valve (PV0021) connected in series.

[0122] A pneumatic valve is installed at the outlet of energy storage tank 3.

[0123] A second electric valve (MV0401, MV0501) is installed at the inlet of energy storage tank 3.

[0124] The inlet of the second electric valve is connected to the outlet of the first pipeline.

[0125] The number of energy storage tanks 3 is two or more.

[0126] A second pipeline is installed at the outlet of an energy storage tank 3. The second pipeline includes a first pneumatic valve (QV0502) and a second regulating valve (PV0501) connected in series.

[0127] The outlets of the remaining energy storage tanks are equipped with a third pipeline. The third pipeline includes a second pneumatic valve (QV0402) and a third electric valve (MV0402) connected in series.

[0128] The outlets of the second and third pipelines are both connected to the inlet of each steam storage tank 4.

[0129] Each steam storage tank 4 is connected to the test chamber 2 via at least one fourth pipeline. Each fourth pipeline includes a third pneumatic valve (QV0111, QV0113, QV0121, QV0123, QV0131, QV0133, QV0141, QV0143) and a fourth electric valve (MV0111, MV0113, MV0121, MV0123, MV0131, MV0133, MV0141, MV0143).

[0130] The inlet of test chamber 2 is connected to the outlet of the first pipeline via the fifth pipeline. The fifth pipeline includes the third regulating valve (PV0121).

[0131] A sixth pipeline is installed at the outlet of test chamber 2. The sixth pipeline includes a fifth electric valve (MV0031) and a fourth regulating valve (PV0031) connected in series.

[0132] Inside test chamber 2, there are two or more temperature sensors and two or more pressure sensors.

[0133] Both the energy storage tank 3 and the steam energy storage tank 4 are equipped with heating equipment.

[0134] The nuclear power plant LOCA test consists of a steam preparation phase, a transient phase, and a steady-state phase, conducted sequentially.

[0135] Reference Figure 3 Step S12 includes:

[0136] S121. During the steam preparation stage, open the first electric valve, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, the first regulating valve, and the second regulating valve. Control the opening degree of the first regulating valve according to the pressure of the energy storage tank, and control the opening degree of the second regulating valve according to the pressure of the steam energy storage tank.

[0137] S122. During the transient phase, open the fourth electric valve and the third pneumatic valve, and control the opening degree of the first regulating valve, the second regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature.

[0138] S123. In the steady state phase, in response to the test chamber temperature being lower than a preset first threshold, the heating equipment of the energy storage tank and the steam energy storage tank is shut down, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve and the second regulating valve are shut down, and the fourth electric valve and the third pneumatic valve are shut down; the opening degree of the third regulating valve and the fourth regulating valve is controlled according to the test chamber pressure and the test chamber temperature.

[0139] The first threshold can be set according to the actual situation.

[0140] In this embodiment, the opening and closing status and specific opening degree of each valve are controlled in stages during the steam preparation stage, transient stage and steady-state stage of the nuclear power LOCA test. This ensures that the temperature and pressure of the test chamber can stably meet the test requirements, realize automatic test control, improve the success rate of the test, save resources during the test process and reduce manual operation.

[0141] In an optional embodiment, refer to Figure 4 Step S121, "controlling the opening of the first regulating valve according to the pressure of the energy storage tank, and controlling the opening of the second regulating valve according to the pressure of the steam energy storage tank," includes:

[0142] S1211. Calculate the pressure deviation between the current expected pressure of the energy storage tank and the current pressure of the steam energy storage tank, and calculate the pressure deviation between the current expected pressure of the steam energy storage tank and the current pressure of the steam energy storage tank. The expected pressure of the energy storage tank and the test time have a preset first functional relationship, and the expected pressure of the steam energy storage tank and the test time have a preset second functional relationship.

[0143] S1212. Calculate the first target opening degree of the first regulating valve based on the pressure deviation of the energy storage tank and the preset first overdrive function, and control the opening degree of the first regulating valve to the first target opening degree.

[0144] S1213. Calculate the second target opening degree of the second regulating valve based on the pressure deviation of the steam storage tank and the preset second overdrive function, and control the opening degree of the second regulating valve to the second target opening degree.

[0145] The following formulas are used to represent the pressure deviation of the energy storage tank and the pressure deviation of the steam energy storage tank:

[0146] Energy storage tank pressure deviation = current expected pressure of energy storage tank - energy storage tank pressure.

[0147] Steam storage tank pressure deviation = current expected pressure of steam storage tank - steam storage tank pressure.

[0148] In this embodiment, during the steam preparation stage, the opening degree of the first regulating valve is controlled according to the pressure deviation of the steam storage tank and the first override function, and the opening degree of the second regulating valve is controlled according to the pressure deviation of the steam storage tank and the second override function.

[0149] In an optional embodiment, refer to Figure 5 Step S122, "controlling the opening of the first regulating valve, the second regulating valve, and the fourth regulating valve according to the test chamber pressure and the test chamber temperature," includes:

[0150] S1221. Calculate the test chamber pressure deviation between the current expected pressure and the test chamber pressure, and calculate the test chamber temperature deviation between the current expected temperature and the test chamber temperature. The expected pressure and test time are related by a preset third function, and the expected temperature and test time are related by a preset fourth function.

[0151] S1222. Calculate the first minimum opening degree of the first regulating valve based on the pressure deviation of the test chamber and the preset third overdrive function. Calculate the third target opening degree of the first regulating valve based on the temperature deviation of the test chamber and the preset first PID function. Control the opening degree of the first regulating valve to the third target opening degree. The third target opening degree is greater than or equal to the first minimum opening degree.

[0152] S1223. Calculate the second minimum opening degree of the second regulating valve based on the pressure deviation of the test chamber and the preset fourth overdrive function. Calculate the fourth target opening degree of the second regulating valve based on the temperature deviation of the test chamber and the preset second PID function. Control the opening degree of the second regulating valve to the fourth target opening degree. The fourth target opening degree is greater than or equal to the second minimum opening degree.

[0153] S1224. Calculate the fifth target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset fifth overdrive function, and control the opening degree of the fourth regulating valve to the fifth target opening degree.

[0154] The following formulas are used to represent the pressure deviation and temperature deviation of the test chamber:

[0155] Test chamber pressure deviation = current expected test chamber pressure - test chamber pressure.

[0156] Test chamber temperature deviation = current expected temperature of test chamber - test chamber temperature.

[0157] In this embodiment, during the transient phase, the minimum opening degree of the first and second regulating valves is limited according to the test chamber pressure deviation and the override function. The specific opening degree of the first and second regulating valves is obtained according to the test chamber temperature deviation and the PID function. The specific opening degree of the fourth regulating valve is obtained according to the test chamber pressure deviation and the override function.

[0158] In an optional embodiment, refer to Figure 6 Step S123, "controlling the opening of the third and fourth regulating valves according to the test chamber pressure and temperature," includes:

[0159] S1231. Calculate the test chamber pressure deviation between the current expected pressure and the test chamber pressure, and calculate the test chamber temperature deviation between the current expected temperature and the test chamber temperature. The expected pressure and test time are related by a preset third function, and the expected temperature and test time are related by a preset fourth function.

[0160] S1232. Based on the temperature deviation of the test chamber and the preset third PID function, the sixth target opening degree of the third regulating valve is calculated, and the opening degree of the third regulating valve is controlled to be the sixth target opening degree.

[0161] S1233. Calculate the seventh target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset sixth overdrive function, and control the opening degree of the fourth regulating valve to the seventh target opening degree.

[0162] The following formulas are used to represent the pressure deviation and temperature deviation of the test chamber:

[0163] Test chamber pressure deviation = current expected test chamber pressure - test chamber pressure.

[0164] Test chamber temperature deviation = current expected temperature of test chamber - test chamber temperature.

[0165] In this embodiment, during the steady-state phase, the specific opening degree of the third regulating valve is obtained based on the temperature deviation of the test chamber and the PID function, and the specific opening degree of the fourth regulating valve is calculated based on the pressure deviation of the test chamber and the overdrive function.

[0166] The following is an example of a control method for implementing a nuclear power plant LOCA test facility, employing methods such as... Figure 1 The nuclear power LOCA test apparatus shown is Figure 1 A triangle indicates an electric valve, a circle indicates a regulating valve, a diamond indicates a pneumatic valve, strings starting with "TE" indicate temperature sensors, and strings starting with "PT" indicate pressure sensors.

[0167] (1) Steam preparation stage.

[0168] The test temperature needs to reach 226 degrees Celsius and the pressure needs to reach 500 kPa. A steam generator cannot achieve such high temperatures and pressures (high-temperature steam cools down quickly when it encounters colder equipment, and the evaporator needs to reach much higher temperatures). Therefore, a staged heating process is required. First, the steam is heated to 180 degrees Celsius in the evaporator, then to 320 degrees Celsius in the storage tank, and finally to 420 degrees Celsius in the steam storage tank, resulting in high-temperature steam.

[0169] First, open the relevant valves (MV0021, MV0401, MV0501, QV0402, MV0402, PV0501, QV0502, PV0021) to allow heated steam to enter the energy storage tank and steam energy storage tank. The pressure in the energy storage tank and steam energy storage tank is controlled by the pressure control module, and the heating temperature is controlled by PID control. This stage mainly involves steam generation and is a transient phase for storing steam.

[0170] The steam generator, energy storage tank, and steam energy storage tank generate steam according to the target heating temperature and target heating pressure. They determine whether the temperature and pressure in the steam generation stage meet the requirements. If the requirements are met, they will automatically enter the transient stage.

[0171] (2) Transient phase

[0172] Figure 7 The figure shows partial data examples of the pressure target curve and temperature target curve in the transient and steady-state stages. The high temperature and high pressure stage and the long-term heat preservation stage are the steady-state stages.

[0173] After steam preparation is complete, the testing phase begins. During the test, the valve between the steam storage tank and the test chamber will be opened instantaneously. At this time, high-temperature and high-pressure steam will be instantly injected into the test chamber, causing the temperature inside the test chamber to rise to 226 degrees Celsius and the pressure to rise to 369 kPa within 10 seconds. It takes 14 minutes to maintain the temperature from 226 degrees Celsius to 206 degrees Celsius. The steam preparation rate of the evaporator itself cannot meet the requirements of the test chamber. Therefore, steam in the storage tank and steam storage tank is the most important source of steam to maintain the steam demand throughout the entire phase. The opening of PV0021 is controlled by temperature PID (using the target temperature of the test chamber to supply gas to the storage tank, and the minimum opening of PV0021 is calculated by the pressure relaxation function), and PV0501 is controlled by temperature PID (using the pressure of the test chamber, the storage tank supplies gas to the steam storage tank, and the minimum opening of PV0501 is calculated by the pressure relaxation function). Superheated steam in the storage tank and steam storage tank is blown into the test chamber. In this process, the temperature and pressure inside the test chamber meet the requirements of the target curve. Both temperature and pressure are controlled via PV0021 (both temperature and pressure are derived from the target temperature and pressure of the test chamber). If either temperature or pressure fails to meet the test requirements, an override function is used to calculate the required valve opening. This opening is then used as the minimum valve opening output for PV0021. A PID function controls PV0021 to control the temperature. If PV0021 cannot reach the target temperature (deviation 0.5 degrees), the electric valve MV0032 will automatically open. PV0031, controlled by the override algorithm, will then discharge low-temperature steam. If the temperature exceeds 5 degrees, both MV0032 and PV0031 will automatically close. When the temperature deviation is less than 5 degrees (temperature priority), and the pressure exceeds the target test pressure by 100 kPa, MV0032 and PV0031 will open to release steam. If the pressure is less than 50 kPa, both will close (temperature control priority).

[0174] First, open the electric valves (MV0111, MV0113, MV0121, MV0123, MV0131, MV0133, MV0141, MV0143), and then simultaneously open (QV0111, QV0113, QV0121, QV0123, QV0131, QV0133, QV0141, QV0143). At the same time, start the test to achieve the target temperature and pressure, reaching the maximum temperature of approximately 226 degrees Celsius (maximum pressure of approximately 369 kPa). After reaching the maximum temperature, control the test chamber temperature through PV0021 to ensure that the target temperature is met during the test.

[0175] (3) Steady-state stage

[0176] When the target temperature curve of the test is lower than 150 degrees, the heating function of the energy storage tank and the steam energy storage tank will be automatically shut off, the electric valves between the steam generator and the energy storage tank (MV0401, MV0501, QV0402, MV0402, PV0501, QV0502) will be shut off, and the electric valves and pneumatic valves between the steam energy storage tank and the test chamber (MV0111, MV0113, MV0121, MV0123, MV0131, MV0133, MV0141, MV0143, QV0111, QV0113, QV0121, QV0123, QV0131, QV0133, QV0141, QV0143) will be shut off. The target heating temperature of the evaporator will be automatically reduced (using the target temperature of the test chamber plus 5 degrees as the target heating temperature of the evaporator). The temperature inside the test chamber will be controlled by PID through PV0121.

[0177] Examples of opening control for PV0021 and PV0501 during the transient and steady-state phases of the experiment are as follows.

[0178] The minimum opening degree of PV0021 and PV0501 is calculated using the pressure override function. Temperature control is performed using a separate PID controller for PV0021 and PV0501, and it must be ensured that the minimum opening degree is the opening degree of the pressure override function.

[0179] The specific implementation of the valve opening degree and corresponding pressure deviation override function is as follows (PV0021 and PV0501 use this override function):

[0180] When the pressure deviation is above 0 kPa, the valve opening of PV0021 / PV0501 is 50.

[0181] The opening of valve PV0021 / PV0501 is adjusted using a function with parameter 1 within the pressure deviation range of 0 kPa to -15 kPa. The starting opening of the function is 50 and the ending opening is 30.

[0182] The opening of valve PV0021 / PV0501 is adjusted using the function with parameter 2 within the pressure deviation range of -15kPa to -20kPa. The starting opening of the function is 30 and the ending opening is 13.

[0183] The opening of valve PV0021 / PV0501 is adjusted using the function with parameter 3 within the pressure deviation range of -20kPa to -30kPa. The starting opening of the function is 13 and the ending opening is 10.

[0184] The opening of valve PV0021 / PV0501 is adjusted using the function with parameter 4 within the pressure deviation range of -30kPa to -40kPa. The starting opening of the function is 10 and the ending opening is 6.

[0185] The opening of valve PV0021 / PV0501 is adjusted using a function with parameter 5 within the pressure deviation range of -40kPa to -50kPa. The starting opening of the function is 6, and the ending opening is 5.

[0186] When the pressure exceeds the expected value by 100 kPa, the electric valve MV0021 is opened to release the pressure; when the pressure is within a deviation range of 50 kPa, the electric valve is closed. This achieves a steady-state control accuracy of ±0.03 MPa.

[0187] The specific override function is as follows:

[0188] (1) First hypersonic function

[0189] X1 represents the pressure deviation of the energy storage tank, the first overdrive function is F1(X1), and A1-A7 and B1-B7 are constant parameters.

[0190] When X1 is greater than 0 kPa: F1(X1) = A1 + X1 * B1 (preferably, A1 equals 50 and B1 equals 1 / 10).

[0191] When X1 falls within the range of 0 kPa to -15 kPa: F1(X1) = A2 + X1 * B2 (preferably, A2 equals 50, and B2 equals 37 / 15).

[0192] When X1 is in the range of -15kPa to -20kPa: F1(X1) = A3 + X1 * B3 (preferably, A3 equals 50 and B3 equals 4 / 3).

[0193] When X1 is in the range of -20kPa to -30kPa: F1(X1) = A4 + X1 * B4 (preferably, A4 equals 70 and B4 equals 2).

[0194] When X1 falls within the range of -30kPa to -40kPa: F1(X1) = A5 + X1 * B5 (preferably, A5 equals 22, and B5 equals 2 / 5).

[0195] When X1 is in the range of -40kPa to -50kPa: F1(X1) = A6 + X1*B6 (preferably, A6 equals 10 and B6 equals 1 / 10).

[0196] When X1 is less than -50kPa: F1(X1)=A7+X1*B7 (preferably, A7 equals 5 and B7 equals 0).

[0197] (2) Second hypersonic function

[0198] X2 represents the pressure deviation of the steam storage tank, the second overdrive function is F2(X2), and C1-C7 and D1-D7 are constant parameters.

[0199] When X2 is greater than 0 kPa: F2(X2) = C1 + X2 * D1 (preferably, C1 equals 50 and D1 equals 1 / 10).

[0200] When X2 is within the range of 0 kPa to -15 kPa: F2(X2) = C2 + X2 * D2 (preferably, C2 equals 50, and D2 equals 37 / 15).

[0201] When X2 is in the range of -15kPa to -20kPa: F2(X2)=C3+X2*D3 (preferably, C3 equals 50 and D3 equals 4 / 3).

[0202] When X2 is in the range of -20kPa to -30kPa: F2(X2)=C4+X2*D4 (preferably, C4 equals 70 and D4 equals 2).

[0203] When X2 is in the range of -30kPa to -40kPa: F2(X2)=C5+X2*D5 (preferably, C5 equals 22, D5 equals 2 / 5);

[0204] When X2 is in the range of -40kPa to -50kPa: F2(X2)=C6+X2*D6 (preferably, C6 equals 10, and D6 equals 1 / 10).

[0205] When X2 is less than -50kPa: F2(X2)=C7+X2*D7 (preferably, C7 equals 5 and D7 equals 0).

[0206] (3) Third hypersonic function

[0207] X3 represents the pressure deviation of the test chamber, the third overdrive function is F3(X3), and E1-E7 and F1-F7 are constant parameters.

[0208] When X3 is greater than 0 kPa: F3(X3) = E1 + X3*F1 (preferably, E1 equals 50 and F1 equals 1 / 10).

[0209] When X3 falls within the range of 0 kPa to -15 kPa: F3(X3) = E2 + X3 * F2 (preferably, E2 equals 50 and F2 equals 37 / 15).

[0210] When X3 falls within the range of -15kPa to -20kPa: F3(X3) = E3 + X3 * F3 (preferably, E3 equals 50 and F3 equals 4 / 3).

[0211] When X3 falls within the range of -20kPa to -30kPa: F3(X3) = E4 + X3 * F4 (preferably, E4 equals 70 and F4 equals 2).

[0212] When X3 falls within the range of -30kPa to -40kPa: F3(X3) = E5 + X3 * F5 (preferably, E5 equals 22 and F5 equals 2 / 5).

[0213] When X3 falls within the range of -40kPa to -50kPa: F3(X3) = E6 + X3 * F6 (preferably, E6 equals 10 and F6 equals 1 / 10).

[0214] When X3 is less than -50kPa: F3(X3) = E7 + X3 * F7 (preferably, E7 equals 5 and F7 equals 0).

[0215] (4) Fourth hypersonic function

[0216] X4 represents the pressure deviation of the test chamber, the fourth overdrive function is F4(X4), and G1-G7 and H1-H7 are constant parameters.

[0217] When X4 is greater than 0 kPa: F4(X4) = G1 + X4 * H1 (preferably, G1 equals 50 and H1 equals 1 / 10).

[0218] When X4 falls within the range of 0 kPa to -15 kPa: F4(X4) = G2 + X4 * H2 (preferably, G2 equals 50 and H2 equals 37 / 15).

[0219] When X4 falls within the range of -15kPa to -20kPa: F4(X4) = G3 + X4 * H3 (preferably, G3 equals 50 and H3 equals 4 / 3).

[0220] When X4 is in the range of -20kPa to -30kPa: F4(X4) = G4 + X4 * H4 (preferably, G4 equals 70 and H4 equals 2).

[0221] When X4 falls within the range of -30kPa to -40kPa: F4(X4) = G5 + X4 * H5 (preferably, G5 equals 22 and H5 equals 2 / 5).

[0222] When X4 is in the range of -40kPa to -50kPa: F4(X4) = G6 + X4 * H6 (preferably, G6 equals 10 and H6 equals 1 / 10).

[0223] When X4 is less than -50kPa: F4(X4) = G7 + X4 * H7 (preferably, G7 equals 5 and H7 equals 0).

[0224] (5) Fifth hypersonic function

[0225] X5 represents the pressure deviation of the test chamber, the fifth overdrive function is F5(X5), and I1-I7 and J1-J7 are constant parameters.

[0226] When X5 is greater than 0 kPa: F5(X5) = I1 + X5 * J1 (preferably, I1 equals 50, and J1 equals 1 / 10).

[0227] When X5 is within the range of 0 kPa to -15 kPa: F5(X5) = I2 + X5 * J2 (preferably, I2 equals 50, and J2 equals 37 / 15).

[0228] When X5 is in the range of -15kPa to -20kPa: F5(X5) = I3 + X5 * J3 (preferably, I3 equals 50 and J3 equals 4 / 3).

[0229] When X5 is in the range of -20kPa to -30kPa: F5(X5) = I4 + X5 * J4 (preferably, I4 equals 70 and J4 equals 2).

[0230] When X5 is in the range of -30kPa to -40kPa: F5(X5) = I5 + X5 * J5 (preferably, I5 equals 22 and J5 equals 2 / 5).

[0231] When X5 is in the range of -40kPa to -50kPa: F5(X5) = I6 + X5 * J6 (preferably, I6 equals 10 and J6 equals 1 / 10).

[0232] When X5 is less than -50kPa: F5(X5) = I7 + X5 * J7 (preferably, I7 equals 5 and J7 equals 0);

[0233] (6) The sixth hypersonic function

[0234] X6 represents the pressure deviation of the test chamber, the sixth overdrive function is F6(X6), and K1-K7 and L1-L7 are constant parameters.

[0235] When X6 is greater than 0 kPa: F6(X6) = K1 + X6 * L1 (preferably, K1 equals 50 and L1 equals 1 / 10).

[0236] When X6 falls within the range of 0 kPa to -15 kPa: F6(X6) = K2 + X6 * L2 (preferably, K2 equals 50, and L2 equals 37 / 15).

[0237] When X6 is in the range of -15kPa to -20kPa: F6(X6) = K3 + X6 * L3 (preferably, K3 equals 50 and L3 equals 4 / 3).

[0238] When X6 falls within the range of -20kPa to -30kPa: F6(X6) = K4 + X6 * L4 (preferably, K4 equals 70 and L4 equals 2).

[0239] When X6 falls within the range of -30kPa to -40kPa: F6(X6) = K5 + X6 * L5 (preferably, K5 equals 22 and L5 equals 2 / 5).

[0240] When X6 is in the range of -40kPa to -50kPa: F6(X6) = K6 + X6 * L6 (preferably, K6 equals 10 and L6 equals 1 / 10).

[0241] When X6 is less than -50kPa: F6(X6) = K7 + X6 * L7 (preferably, K7 equals 5 and L7 equals 0).

[0242] The PID functions all use the incremental PID algorithm, as detailed below:

[0243] (1) First PID function

[0244] U1(K1)=K p1 *{e(k1)-e(k1-1)}+K i1 *e(k1)+K d1 *{e(k1)-2*e(k1-1)+e(k1-2)}

[0245] U1(K1) is the first PID function, used to calculate the third target opening degree of the first regulating valve; e(k1) is the temperature deviation of the test chamber at the current moment, which is an input variable; k1 is the current moment, e(k1-1) is the temperature deviation of the test chamber at the previous moment, e(k1-2) is the temperature deviation of the test chamber at the two moments before, and K... p1 K is the proportionality coefficient. i1 K is the integral coefficient. d1 K is the differentiator amplification factor. Preferably, K p1 Set to 6.0, K i1 Set to 1, T d1 Set to 1.1, K d1 Set it to 0.636.

[0246] (2) Second PID function

[0247] U2(K2)=K p2 *{e(k2)-e(k2-1)}+K i2 *e(k2)+K d2 *{e(k2)-2*e(k2-1)+e(k2-2)}

[0248] U2(K2) is the second PID function, used to calculate the fourth target opening degree of the second regulating valve; e(k2) is the temperature deviation of the test chamber at the current moment, which is an input variable; k2 is the current moment, e(k2-1) is the temperature deviation of the test chamber at the previous moment, e(k2-2) is the temperature deviation of the test chamber at the two moments before, and K... p2 K is the proportionality coefficient. i2 K is the integral coefficient. d2 K is the differentiator amplification factor. Preferably, K p2 Set to 6.0, K i2 Set to 1, T d2 Set to 2.2, K d2 Set it to 0.636.

[0249] (3) Third PID function

[0250] U3(K3)=K p3 *{e(k3)-e(k3-1)}+K i3 *e(k3)+K d3 *{e(k3)-2*e(k3-1)+e(k3-2)}

[0251] U3(K3) is the third PID function, used to calculate the sixth target opening degree of the third regulating valve; k3 is the current time, e(k3) is the temperature deviation of the test chamber at the current time, which is an input variable; e(k3-1) is the temperature deviation of the test chamber at the previous time, e(k3-2) is the temperature deviation of the test chamber at the two time points before that, K p3 K is the proportionality coefficient. i3 K is the integral coefficient. d3 K is the differentiator amplification factor. Preferably, K p3 Set to 6.0, K i3 Set to 1, T d3 Set to 3.3, K d3 Set it to 0.666.

[0252] The specific relationship between the first and fourth functions is as follows:

[0253] (1) First functional relationship

[0254] X7 is the test time (in seconds), the first functional relationship is F7(X7) (in kPa), and M1-M9 and N1-N9 are constant parameters.

[0255] When X7 falls within the range of 0s to 3s: F7(X7) = M1 + X7 * N1 (preferably, M1 equals 0 and N1 equals 123).

[0256] When X7 falls within the range of 3s to 200s: F7(X7) = M2 + X7 * N2 (preferably, M2 equals 200 and N2 equals 0).

[0257] When X7 falls within the range of 200s to 220s: F7(X7) = M3 + X7 * N3 (preferably, M3 equals -411, N3 equals 39 / 10).

[0258] When X7 falls within the range of 220s to 420s: F7(X7) = M4 + X7 * N4 (preferably, M4 equals 447 and N4 equals 0).

[0259] When X7 falls within the range of 420s to 460s: F7(X7) = M5 + X7 * N5 (preferably, M5 equals 426 and N5 equals 1 / 20).

[0260] When X7 falls within the range of 460s to 2500s: F7(X7) = M6 + X7 * N6 (preferably, M6 equals 449 and N6 equals 0).

[0261] When X7 is in the range of 2500s to 10800s: F7(X7) = M7 + X7 * N7 (preferably, M7 equals 449 and N7 equals -507.433).

[0262] When X7 is in the range of 10800s to 12000s: F7(X7) = M8 + X7 * N8 (preferably, M8 equals 255 and N8 equals 0).

[0263] When X7 is greater than 12000s: F7(X7) = M9 + X7 * N9 (preferably, M9 equals 264.857, N9 equals -23 / 25200).

[0264] (2) Second functional relationship

[0265] X8 represents the test time (in seconds), the second functional relationship is F8(X8) (in kPa), and O1-O9 and P1-P9 are constant parameters.

[0266] When X8 is within the range of 0s to 3s: F8(X8) = O1 + X8 * P1 (preferably, O1 equals 0, and P1 equals 123).

[0267] When X8 falls within the range of 3s to 200s: F8(X8) = O2 + X8 * P2 (preferably, O2 equals 200 and P2 equals 0).

[0268] When X8 is in the range of 200s to 220s: F8(X8) = O3 + X8 * P3 (preferably, O3 equals -411, P3 equals 39 / 10).

[0269] When X8 is in the range of 220s to 420s: F8(X8) = O4 + X8 * P4 (preferably, O4 equals 447 and P4 equals 0).

[0270] When X8 is in the range of 420s to 460s: F8(X8) = O5 + X8 * P5 (preferably, O5 equals 426, and P5 equals 1 / 20).

[0271] When X8 falls within the range of 460s to 2500s: F8(X8) = O6 + X8 * P6 (preferably, O6 equals 449 and P6 equals 0).

[0272] When X8 is in the range of 2500s to 10800s: F8(X8) = O7 + X8 * P7 (preferably, O7 equals 449, P7 equals -507.433).

[0273] When X8 is in the range of 10800s to 12000s: F8(X8) = O8 + X8 * P8 (preferably, O8 equals 255 and P8 equals 0).

[0274] When X8 is greater than 12000s: F8(X8) = O9 + X8 * P9 (preferably, O9 equals 264.857, P9 equals -23 / 25200).

[0275] (3) Third functional relationship

[0276] X9 is the test time (in seconds), the third functional relationship is F9(X9) (in kPa), and Q1-Q9 and R1-R9 are constant parameters.

[0277] When X9 falls within the range of 0s to 3s: F9(X9) = Q1 + X9 * R1 (preferably, Q1 equals 0, and R1 equals 123).

[0278] When X9 falls within the range of 3s to 200s: F9(X9) = Q2 + X9 * R2 (preferably, Q2 equals 200 and R2 equals 0).

[0279] When X9 falls within the range of 200s to 220s: F9(X9) = Q3 + X9 * R3 (preferably, Q3 equals -411, and R3 equals 39 / 10).

[0280] When X9 falls within the range of 220s to 420s: F9(X9) = Q4 + X9 * R4 (preferably, Q4 equals 447 and R4 equals 0).

[0281] When X9 falls within the range of 420s to 460s: F9(X9) = Q5 + X9 * R5 (preferably, Q5 equals 426 and R5 equals 1 / 20).

[0282] When X9 falls within the range of 460s to 2500s: F9(X9) = Q6 + X9 * R6 (preferably, Q6 equals 449 and R6 equals 0).

[0283] When X9 falls within the range of 2500s to 10800s: F9(X9) = Q7 + X9 * R7 (preferably, Q7 equals 449, and R7 equals -507.433).

[0284] When X9 is in the range of 10800s to 12000s: F9(X9) = Q8 + X9 * R8 (preferably, Q8 equals 255 and R8 equals 0).

[0285] When X9 is greater than 12000s: F9(X9) = Q9 + X9 * R9 (preferably, Q9 equals 264.857, and R9 equals -23 / 25200).

[0286] (4) Fourth functional relationship

[0287] X10 is the test time (in seconds), the fourth function relationship is F10(X10), and S1-S9 and T1-T9 are constant parameters.

[0288] When X10 falls within the range of 0s to 2s: F10(X10) = S1 + X10 * T1; (Preferably, S1 equals 49, and T1 equals 90)

[0289] When X10 is within the range of 2s to 4s: F10(X10) = S2 + X10 * T2 (preferably, S2 equals 180 and T2 equals 0).

[0290] When X10 is within the range of 4s to 5s: F10(X10) = S3 + X10 * T3 (preferably, S3 equals 169 and T3 equals 11 / 2).

[0291] When X10 is within the range of 5s to 8s: F10(X10) = S4 + X10 * T4 (preferably, S4 equals 191 and T4 equals 0).

[0292] When X10 is within the range of 8s to 10s: F10(X10) = S5 + X10 * T5 (preferably, S5 equals 159 and T5 equals 4).

[0293] When X10 falls within the range of 18s to 21s: F10(X10) = S6 + X10 * T6 (preferably, S6 equals 226 and T6 equals 0).

[0294] When X10 falls within the range of 21s to 25s: F10(X10) = S7 + X10 * T7 (preferably, S7 equals 268 and T7 equals -2).

[0295] When X10 is in the range of 25s to 300s: F10(X10) = S8 + X10 * T8 (preferably, S8 equals 218 and T8 equals 0).

[0296] When X10 is greater than 300s: F10(X10) = S9 + X10 * T9 (preferably, S9 equals 218.25, T9 equals -18 / 21525).

[0297] Example 2

[0298] Corresponding to the aforementioned control method embodiments for nuclear power LOCA test apparatus, this disclosure also provides embodiments for the control system of nuclear power LOCA test apparatus.

[0299] Reference Figure 1 The nuclear power LOCA test apparatus includes: a steam generator, a test chamber, at least one energy storage tank and at least one steam energy storage tank.

[0300] The steam generator is connected to the energy storage tank, the energy storage tank is connected to the steam energy storage tank, and the steam energy storage tank is connected to the test chamber.

[0301] The steam generator is also connected to the test chamber.

[0302] At least one valve is installed at the outlet of the steam generator, the energy storage tank, the steam energy storage tank, and the test chamber.

[0303] The energy storage tank, steam energy storage tank, and test chamber are all equipped with at least one temperature sensor and at least one pressure sensor.

[0304] Figure 8 A schematic diagram of the control system of a nuclear power LOCA test apparatus provided for an exemplary embodiment of the present disclosure is shown. The system includes: a data acquisition and processing module 21 and a pressure and temperature control module 22.

[0305] The data acquisition and processing module 21 is used to acquire the pressure and temperature of the energy storage tank, the steam energy storage tank, the test chamber pressure, and the test chamber temperature through temperature and pressure sensors.

[0306] The pressure and temperature control module 22 is used to control the opening and closing status and degree of each valve according to the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, so that the pressure of the test chamber changes according to the preset pressure target curve and the temperature of the test chamber changes according to the preset temperature target curve.

[0307] In this embodiment, the pressure and temperature of the test chamber are dynamically adjusted by changing the opening degree of each pressure-reducing valve. This achieves dynamic parameter self-tuning capability and automated control, enabling streamlined and standardized control of the entire test process. The pressure / temperature target curve is determined using a functional relationship obtained from real data. This target curve reflects the test objectives corresponding to different test times (moments), breaking down the complex pressure-temperature-flow coupling relationship. Furthermore, the opening degree of the corresponding valve is adjusted by calculating the target opening degree, addressing nonlinear and complex time-varying systems. This improves the precision and accuracy of temperature and pressure control, reduces test errors, and enhances test determinism. It also strengthens anti-interference and robustness, reduces manual parameter tuning, improves response speed, and allows for rapid adaptation to various environments.

[0308] In an optional embodiment, refer to Figure 1 Valves include electric valves, regulating valves, and pneumatic valves.

[0309] A first pipeline is installed at the outlet of the steam generator. The first pipeline includes a first electric valve and a first regulating valve connected in series.

[0310] A pneumatic valve is installed at the outlet of the energy storage tank.

[0311] A second electric valve is installed at the inlet of the energy storage tank.

[0312] The inlet of the second electric valve is connected to the outlet of the first pipeline.

[0313] The number of energy storage tanks is two or more.

[0314] A second pipeline is installed at the outlet of an energy storage tank. The second pipeline includes a first pneumatic valve and a second regulating valve connected in series.

[0315] The outlets of the remaining energy storage tanks are equipped with a third pipeline. The third pipeline includes a second pneumatic valve and a third electric valve connected in series.

[0316] The outlets of the second and third pipelines are both connected to the inlet of each steam storage tank.

[0317] Each steam storage tank is connected to the test chamber via at least one fourth pipeline. Each fourth pipeline includes a third pneumatic valve and a fourth electric valve.

[0318] The inlet of the test chamber is connected to the outlet of the first pipeline via the fifth pipeline. The fifth pipeline includes the third regulating valve.

[0319] A sixth pipeline is installed at the outlet of the test chamber. The sixth pipeline includes a fifth electric valve and a fourth regulating valve connected in series.

[0320] Inside the test chamber, there are two or more temperature sensors and two or more pressure sensors.

[0321] Both the energy storage tank and the steam energy storage tank are equipped with heating equipment.

[0322] The nuclear power plant LOCA test consists of a steam preparation phase, a transient phase, and a steady-state phase, conducted sequentially.

[0323] The pressure and temperature control module 22 is also used to open the first electric valve, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, the first regulating valve, and the second regulating valve during the steam preparation stage, control the opening degree of the first regulating valve according to the pressure of the energy storage tank, and control the opening degree of the second regulating valve according to the pressure of the steam energy storage tank.

[0324] The pressure and temperature control module 22 is also used to open the fourth electric valve and the third pneumatic valve during the transient phase, and to control the opening degree of the first regulating valve, the second regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature.

[0325] The pressure and temperature control module 22 is also used to, in the steady state phase, in response to the test chamber temperature being lower than a preset first threshold, shut down the heating equipment of the energy storage tank and the steam energy storage tank, shut down the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve and the second regulating valve, and shut down the fourth electric valve and the third pneumatic valve; and control the opening degree of the third regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature.

[0326] In an optional embodiment, the pressure and temperature control module 22 is further configured to calculate the pressure deviation between the current expected pressure of the energy storage tank and the current energy storage tank pressure, and to calculate the pressure deviation between the current expected pressure of the steam energy storage tank and the current steam energy storage tank pressure. The expected pressure of the energy storage tank and the test time are related by a preset first function, and the expected pressure of the steam energy storage tank and the test time are related by a preset second function.

[0327] The pressure and temperature control module 22 is also used to calculate the first target opening degree of the first regulating valve based on the pressure deviation of the energy storage tank and the preset first overdrive function, and control the opening degree of the first regulating valve to the first target opening degree.

[0328] The pressure and temperature control module 22 is also used to calculate the second target opening degree of the second regulating valve based on the pressure deviation of the steam storage tank and the preset second overdrive function, and control the opening degree of the second regulating valve to the second target opening degree.

[0329] In an optional embodiment, the pressure and temperature control module 22 is further configured to calculate the test chamber pressure deviation between the current expected test chamber pressure and the test chamber pressure, and to calculate the test chamber temperature deviation between the current expected test chamber temperature and the test chamber temperature. The expected test chamber pressure and test time are related by a preset third function, and the expected test chamber temperature and test time are related by a preset fourth function.

[0330] The pressure and temperature control module 22 is also used to calculate the first minimum opening degree of the first regulating valve based on the pressure deviation of the test chamber and a preset third override function, and to calculate the third target opening degree of the first regulating valve based on the temperature deviation of the test chamber and a preset first PID function, and control the opening degree of the first regulating valve to the third target opening degree. The third target opening degree is greater than or equal to the first minimum opening degree.

[0331] The pressure and temperature control module 22 is also used to calculate the second minimum opening degree of the second regulating valve based on the pressure deviation of the test chamber and a preset fourth override function, and to calculate the fourth target opening degree of the second regulating valve based on the temperature deviation of the test chamber and a preset second PID function, and control the opening degree of the second regulating valve to the fourth target opening degree. The fourth target opening degree is greater than or equal to the second minimum opening degree.

[0332] The pressure and temperature control module 22 is also used to calculate the fifth target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset fifth overdrive function, and control the opening degree of the fourth regulating valve to the fifth target opening degree.

[0333] In an optional embodiment, the pressure and temperature control module 22 is further configured to calculate the test chamber pressure deviation between the current expected test chamber pressure and the test chamber pressure, and to calculate the test chamber temperature deviation between the current expected test chamber temperature and the test chamber temperature. The expected test chamber pressure and test time are related by a preset third function, and the expected test chamber temperature and test time are related by a preset fourth function.

[0334] The pressure and temperature control module 22 is also used to calculate the sixth target opening degree of the third regulating valve based on the temperature deviation of the test chamber and the preset third PID function, and control the opening degree of the third regulating valve to the sixth target opening degree.

[0335] The pressure and temperature control module 22 is also used to calculate the seventh target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset sixth overdrive function, and control the opening degree of the fourth regulating valve to the seventh target opening degree.

[0336] For the system embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs.

[0337] Example 3

[0338] Figure 9 This is a schematic diagram of the structure of an electronic device according to an example embodiment of the present disclosure. The electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the control method of the nuclear power LOCA test device described in any of the above embodiments. Figure 9 The electronic device 90 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0339] like Figure 9 As shown, the electronic device 90 can be manifested as a general-purpose computing device, such as a server device. The components of the electronic device 90 may include, but are not limited to: at least one processor 91, at least one memory 92, and a bus 93 connecting different system components (including memory 92 and processor 91).

[0340] Bus 93 includes a data bus, an address bus, and a control bus.

[0341] The memory 92 may include volatile memory, such as random access memory (RAM) 921 and / or cache memory 922, and may further include read-only memory (ROM) 923.

[0342] The memory 92 may also include a program tool 925 (or utility) having a set (at least one) program module 924, such program module 924 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0343] The processor 91 executes various functional applications and data processing by running computer programs stored in the memory 92, such as the control method of the nuclear power LOCA test apparatus provided in any of the above embodiments.

[0344] Electronic device 90 can also communicate with one or more external devices 94 (e.g., keyboard, pointing device, etc.). This communication can be performed through input / output (I / O) interface 95. Furthermore, electronic device 90 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 96. As shown, network adapter 96 communicates with other modules of electronic device 90 via bus 93. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 90, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0345] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0346] Example 4

[0347] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the control method for the nuclear power LOCA test apparatus described in any of the preceding embodiments.

[0348] The program code for executing the computer program product of this disclosure can be written in any combination of one or more programming languages, and the program code can be executed entirely on a user device, partially on a user device, as a stand-alone software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0349] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A control method for a nuclear power plant LOCA test device, characterized in that, The nuclear power LOCA test apparatus includes: a steam generator, a test chamber, at least one energy storage tank, and at least one steam energy storage tank; The steam generator is connected to the energy storage tank, the energy storage tank is connected to the steam energy storage tank, and the steam energy storage tank is connected to the test chamber; The steam generator is also connected to the test chamber; At least one valve is provided at the outlet of the steam generator, the energy storage tank, the steam energy storage tank, and the test chamber; The energy storage tank, the steam energy storage tank, and the test chamber are all equipped with at least one temperature sensor and at least one pressure sensor. The control method for the nuclear power LOCA test device includes: The energy storage tank pressure, energy storage tank temperature, steam energy storage tank pressure, steam energy storage tank temperature, test chamber pressure, and test chamber temperature are obtained through the temperature sensor and the pressure sensor. The opening and closing status and degree of each valve are controlled according to the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, so that the pressure of the test chamber changes according to the preset pressure target curve and the temperature of the test chamber changes according to the preset temperature target curve. The valves include electric valves, regulating valves, and pneumatic valves; The steam generator is provided with a first pipeline at its outlet; the first pipeline includes a first electric valve and a first regulating valve connected in series. A pneumatic valve is installed at the outlet of the energy storage tank; A second electric valve is installed at the inlet of the energy storage tank; The inlet of the second electric valve is connected to the outlet of the first pipeline; The number of energy storage tanks is two or more; A second pipeline is provided at the outlet of one of the energy storage tanks; the second pipeline includes a first pneumatic valve and a second regulating valve connected in series; The outlets of the remaining energy storage tanks are equipped with a third pipeline; the third pipeline includes a second pneumatic valve and a third electric valve connected in series; The outlets of the second pipeline and the third pipeline are both connected to the inlet of each of the steam storage tanks; Each of the steam storage tanks is connected to the test chamber via at least one fourth pipeline; each fourth pipeline plate includes a third pneumatic valve and a fourth electric valve; The inlet of the test chamber is connected to the outlet of the first pipeline via a fifth pipeline; the fifth pipeline includes a third regulating valve. A sixth pipeline is installed at the outlet of the test chamber; the sixth pipeline includes a fifth electric valve and a fourth regulating valve connected in series; Inside the test chamber, there are two or more temperature sensors and two or more pressure sensors. Both the energy storage tank and the steam energy storage tank are equipped with heating devices; Nuclear power plant LOCA tests consist of a steam preparation phase, a transient phase, and a steady-state phase, conducted sequentially. The method of controlling the opening and closing status and degree of each valve based on the pressure and temperature of the energy storage tank, the pressure and temperature of the steam energy storage tank, the pressure and temperature of the test chamber, and the test chamber temperature includes: During the steam preparation stage, the first electric valve, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, the first regulating valve, and the second regulating valve are opened. The opening degree of the first regulating valve is controlled according to the pressure of the energy storage tank, and the opening degree of the second regulating valve is controlled according to the pressure of the steam energy storage tank. During the transient phase, the fourth electric valve and the third pneumatic valve are opened, and the opening degree of the first regulating valve, the second regulating valve, and the fourth regulating valve is controlled according to the test chamber pressure and the test chamber temperature. During the steady-state phase, in response to the test chamber temperature falling below a preset first threshold, the heating equipment of the energy storage tank and the steam energy storage tank is shut down, and the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, and the second regulating valve are shut down, as are the fourth electric valve and the third pneumatic valve; the opening degree of the third regulating valve and the fourth regulating valve is controlled according to the test chamber pressure and the test chamber temperature.

2. The control method for the nuclear power plant LOCA test apparatus as described in claim 1, characterized in that, The step of controlling the opening of the first regulating valve according to the pressure of the energy storage tank, and controlling the opening of the second regulating valve according to the pressure of the steam energy storage tank, includes: The pressure deviation between the current expected pressure of the energy storage tank and the pressure of the energy storage tank is calculated, and the pressure deviation between the current expected pressure of the steam energy storage tank and the pressure of the steam energy storage tank is calculated; wherein, the expected pressure of the energy storage tank and the test time have a preset first functional relationship, and the expected pressure of the steam energy storage tank and the test time have a preset second functional relationship. The first target opening degree of the first regulating valve is calculated based on the pressure deviation of the energy storage tank and the preset first oversight function, and the opening degree of the first regulating valve is controlled to be the first target opening degree. The second target opening degree of the second regulating valve is calculated based on the pressure deviation of the steam storage tank and the preset second overdrive function, and the opening degree of the second regulating valve is controlled to be the second target opening degree.

3. The control method for the nuclear power plant LOCA test apparatus as described in claim 1, characterized in that, The step of controlling the opening degrees of the first regulating valve, the second regulating valve, and the fourth regulating valve based on the pressure and temperature of the test chamber includes: The test chamber pressure deviation between the current expected pressure and the test chamber pressure is calculated, and the test chamber temperature deviation between the current expected temperature and the test chamber temperature is calculated; wherein, the expected pressure and test time have a preset third functional relationship, and the expected temperature and test time have a preset fourth functional relationship. The first minimum opening degree of the first regulating valve is calculated based on the pressure deviation of the test chamber and a preset third overdrive function. The third target opening degree of the first regulating valve is calculated based on the temperature deviation of the test chamber and a preset first PID function. The opening degree of the first regulating valve is controlled to be the third target opening degree. Wherein, the third target opening degree is greater than or equal to the first minimum opening degree. The second minimum opening degree of the second regulating valve is calculated based on the pressure deviation of the test chamber and the preset fourth overdrive function. The fourth target opening degree of the second regulating valve is calculated based on the temperature deviation of the test chamber and the preset second PID function. The opening degree of the second regulating valve is controlled to be the fourth target opening degree. Wherein, the fourth target opening degree is greater than or equal to the second minimum opening degree. The fifth target opening degree of the fourth regulating valve is calculated based on the pressure deviation of the test chamber and the preset fifth overdrive function, and the opening degree of the fourth regulating valve is controlled to be the fifth target opening degree.

4. The control method for the nuclear power plant LOCA test apparatus as described in claim 1, characterized in that, The step of controlling the opening of the third and fourth regulating valves based on the pressure and temperature of the test chamber includes: The test chamber pressure deviation between the current expected pressure and the test chamber pressure is calculated, and the test chamber temperature deviation between the current expected temperature and the test chamber temperature is calculated; wherein, the expected pressure and test time have a preset third functional relationship, and the expected temperature and test time have a preset fourth functional relationship. The sixth target opening degree of the third regulating valve is calculated based on the temperature deviation of the test chamber and the preset third PID function, and the opening degree of the third regulating valve is controlled to be the sixth target opening degree. The seventh target opening degree of the fourth regulating valve is calculated based on the pressure deviation of the test chamber and the preset sixth overdrive function, and the opening degree of the fourth regulating valve is controlled to be the seventh target opening degree.

5. A control system for a nuclear power plant LOCA test apparatus, characterized in that, The nuclear power LOCA test apparatus includes: a steam generator, a test chamber, at least one energy storage tank, and at least one steam energy storage tank; The steam generator is connected to the energy storage tank, the energy storage tank is connected to the steam energy storage tank, and the steam energy storage tank is connected to the test chamber; The steam generator is also connected to the test chamber; At least one valve is provided at the outlet of the steam generator, the energy storage tank, the steam energy storage tank, and the test chamber; The energy storage tank, the steam energy storage tank, and the test chamber are all equipped with at least one temperature sensor and at least one pressure sensor. The control system of the nuclear power LOCA test device includes: a data acquisition and processing module and a pressure and temperature control module; The data acquisition and processing module is used to acquire the energy storage tank pressure, energy storage tank temperature, steam energy storage tank pressure, steam energy storage tank temperature, test chamber pressure, and test chamber temperature through the temperature sensor and the pressure sensor. The pressure and temperature control module is used to control the opening and closing status and degree of each valve according to the pressure of the energy storage tank, the temperature of the energy storage tank, the pressure of the steam energy storage tank, the temperature of the steam energy storage tank, the pressure of the test chamber, and the temperature of the test chamber, so that the pressure of the test chamber changes according to the preset pressure target curve and the temperature of the test chamber changes according to the preset temperature target curve. The valves include electric valves, regulating valves, and pneumatic valves; The steam generator is provided with a first pipeline at its outlet; the first pipeline includes a first electric valve and a first regulating valve connected in series. A pneumatic valve is installed at the outlet of the energy storage tank; A second electric valve is installed at the inlet of the energy storage tank; The inlet of the second electric valve is connected to the outlet of the first pipeline; The number of energy storage tanks is two or more; A second pipeline is provided at the outlet of one of the energy storage tanks; the second pipeline includes a first pneumatic valve and a second regulating valve connected in series; The outlets of the remaining energy storage tanks are equipped with a third pipeline; the third pipeline includes a second pneumatic valve and a third electric valve connected in series; The outlets of the second pipeline and the third pipeline are both connected to the inlet of each of the steam storage tanks; Each of the steam storage tanks is connected to the test chamber via at least one fourth pipeline; each fourth pipeline plate includes a third pneumatic valve; The inlet of the test chamber is connected to the outlet of the first pipeline via a fifth pipeline; the fifth pipeline includes a third regulating valve. A sixth pipeline is installed at the outlet of the test chamber; the sixth pipeline includes a fifth electric valve and a fourth regulating valve connected in series; Inside the test chamber, there are two or more temperature sensors and two or more pressure sensors. Both the energy storage tank and the steam energy storage tank are equipped with heating devices; Nuclear power plant LOCA tests consist of a steam preparation phase, a transient phase, and a steady-state phase, conducted sequentially. The pressure and temperature control module is also used in the steam preparation stage to open the first electric valve, the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve, the first regulating valve, and the second regulating valve, and to control the opening degree of the first regulating valve according to the pressure of the energy storage tank, and to control the opening degree of the second regulating valve according to the pressure of the steam energy storage tank. The pressure and temperature control module is also used to open the fourth electric valve and the third pneumatic valve during the transient phase, and to control the opening degree of the first regulating valve, the second regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature; The pressure and temperature control module is also used to, in the steady state phase, in response to the test chamber temperature being lower than a preset first threshold, shut down the heating equipment of the energy storage tank and the steam energy storage tank, shut down the second electric valve, the third electric valve, the first pneumatic valve, the second pneumatic valve and the second regulating valve, and shut down the fourth electric valve and the third pneumatic valve; and control the opening degree of the third regulating valve and the fourth regulating valve according to the test chamber pressure and the test chamber temperature.

6. The control system of the nuclear power plant LOCA test apparatus as described in claim 5, characterized in that, The pressure and temperature control module is also used to calculate the pressure deviation between the current expected pressure of the energy storage tank and the current pressure of the energy storage tank, and to calculate the pressure deviation between the current expected pressure of the steam energy storage tank and the current pressure of the steam energy storage tank; wherein, the expected pressure of the energy storage tank and the test time are a preset first function relationship, and the expected pressure of the steam energy storage tank and the test time are a preset second function relationship. The pressure and temperature control module is also used to calculate the first target opening degree of the first regulating valve based on the pressure deviation of the energy storage tank and the preset first overdrive function, and control the opening degree of the first regulating valve to be the first target opening degree. The pressure and temperature control module is also used to calculate the second target opening degree of the second regulating valve based on the pressure deviation of the steam storage tank and the preset second overdrive function, and control the opening degree of the second regulating valve to be the second target opening degree; And / or, The pressure and temperature control module is also used to calculate the test chamber pressure deviation between the current expected pressure of the test chamber and the test chamber pressure, and to calculate the test chamber temperature deviation between the current expected temperature of the test chamber and the test chamber temperature; wherein, the expected pressure of the test chamber and the test time are related by a preset third function, and the expected temperature of the test chamber and the test time are related by a preset fourth function. The pressure and temperature control module is further configured to calculate the first minimum opening degree of the first regulating valve based on the pressure deviation of the test chamber and a preset third overdrive function, calculate the third target opening degree of the first regulating valve based on the temperature deviation of the test chamber and a preset first PID function, and control the opening degree of the first regulating valve to be the third target opening degree; wherein, the third target opening degree is greater than or equal to the first minimum opening degree; The pressure and temperature control module is further configured to calculate the second minimum opening degree of the second regulating valve based on the pressure deviation of the test chamber and a preset fourth overdrive function, calculate the fourth target opening degree of the second regulating valve based on the temperature deviation of the test chamber and a preset second PID function, and control the opening degree of the second regulating valve to be the fourth target opening degree; wherein, the fourth target opening degree is greater than or equal to the second minimum opening degree; The pressure and temperature control module is also used to calculate the fifth target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset fifth overdrive function, and control the opening degree of the fourth regulating valve to be the fifth target opening degree; And / or, The pressure and temperature control module is also used to calculate the test chamber pressure deviation between the current expected pressure of the test chamber and the test chamber pressure, and to calculate the test chamber temperature deviation between the current expected temperature of the test chamber and the test chamber temperature; wherein, the expected pressure of the test chamber and the test time are related by a preset third function, and the expected temperature of the test chamber and the test time are related by a preset fourth function. The pressure and temperature control module is also used to calculate the sixth target opening degree of the third regulating valve based on the temperature deviation of the test chamber and the preset third PID function, and control the opening degree of the third regulating valve to be the sixth target opening degree. The pressure and temperature control module is also used to calculate the seventh target opening degree of the fourth regulating valve based on the pressure deviation of the test chamber and the preset sixth overdrive function, and control the opening degree of the fourth regulating valve to be the seventh target opening degree.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that, When the processor executes the computer program, it implements the control method of the nuclear power LOCA test apparatus as described in any one of claims 1 to 4.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method of the nuclear power LOCA test apparatus as described in any one of claims 1-4.

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