Temperature regulation and control method and system for main loop of thermal hydraulic experiment system

Abstract

The invention discloses a temperature regulation and control method and system for a main loop of a thermal hydraulic experiment system, and relates to the field of thermal hydraulic experiment research. The invention discloses a temperature regulation and control method for a main loop of a thermal hydraulic experiment system. The method comprises the steps of collecting historical data of the thermal hydraulic experiment system; training the to-be-trained valve opening prediction model to obtain a trained valve opening prediction model; the real-time experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature and the cooling water inlet fluid temperature serve as input parameters of the valve opening prediction model, and a valve opening feed-forward value is obtained through real-time prediction; a valve opening feedback value is obtained; and adding the valve opening feedforward value and the valve opening feedback value to obtain a valve opening value, and respectively controlling a cooling water flow regulating valve, a main loop cooler bypass flow regulating valve and a main loop cooler branch flow regulating valve to realize temperature regulation and control of the main loop of the thermal hydraulic experiment system. The problems that the main loop of the thermal hydraulic experiment system is difficult to maintain relatively stable in the experiment process and the flow fluctuation of the main loop is large when the temperature is regulated and controlled are solved.

Description

Technical Field

[0001] The invention relates to the field of thermal hydraulic experiment research, and in particular to a temperature control method and system for a main loop of a thermal hydraulic experiment system. Background Art

[0002] The loop of the thermal hydraulic experiment system is a commonly used experimental system for conducting thermal hydraulic experimental research. The experimental body is often located on the experimental branch, and the main loop refers to the loop used to provide the experimental branch with a fluid source with relatively stable temperature and a small flow fluctuation range. During the experiment, the flow, temperature, heating power, etc. on the experimental branch often change according to the working conditions. In order to better provide the appropriate inlet temperature adjustment for the experimental body, it is often necessary to control the main loop of the thermal hydraulic experiment system to maintain a relatively stable temperature. In order to maintain the stability of the main circulation pump, it is also necessary to adjust the main loop temperature. The fluctuation range of the main loop flow is not large. This is inconsistent with the condition that the system heat source (body heating power) often changes. For this reason, it is necessary to continuously adjust the cooling water flow, the bypass flow of the main loop cooler, and the branch flow of the main loop cooler to adjust the main loop temperature.

[0003] However, due to the nonlinearity and large hysteresis of the thermal hydraulic experiment system, it is difficult to maintain the stability of the main circuit of the thermal hydraulic experiment system. Therefore, it is urgent to provide a temperature control method and system that can realize the temperature control of the main circuit of the thermal hydraulic experiment system, while maintaining the main circuit of the thermal hydraulic experiment system relatively stable and with little fluctuation in the flow of the main circuit during the experiment. Summary of the invention

[0004] The technical problem to be solved by the present invention is that it is difficult to maintain a stable main circuit temperature of the existing thermal-hydraulic experiment system when the operating conditions change over a wide range, and it is not possible to maintain a stable main circuit flow of the thermal-hydraulic experiment system, resulting in large fluctuations in the circuit flow. The purpose is to provide a temperature control method and system for the main circuit of a thermal-hydraulic experiment system, which solves the problem that it is difficult to maintain a relative stability of the main circuit of the thermal-hydraulic experiment system during the experiment while controlling the temperature, and the main circuit flow fluctuates greatly.

[0005] The present invention is achieved through the following technical solutions:

[0006] A temperature control method for a main circuit of a thermal hydraulic experiment system, comprising:

[0007] Collecting historical data of the thermal hydraulic experiment system, wherein the historical data includes the heating power of the experimental branch, the fluid flow rate at the primary inlet of the cooler, the fluid temperature at the primary inlet of the cooler, the fluid temperature at the cooling water inlet, and the valve opening value;

[0008] Train the valve opening prediction model to be trained using the heating power of the experimental branch, the fluid flow rate at the primary side inlet of the cooler, the fluid temperature at the primary side inlet of the cooler, the fluid temperature at the cooling water inlet, and the valve opening value, and obtain the trained valve opening prediction model;

[0009] Use the real-time heating power of the experimental branch, the fluid flow rate at the primary side inlet of the cooler, the fluid temperature at the primary side inlet of the cooler, and the fluid temperature at the cooling water inlet as the input parameters of the valve opening prediction model, and obtain the feedforward value of the valve opening through real-time prediction;

[0010] Obtain the feedback value of the valve opening according to the deviation between the main circuit fluid temperature and the target value of the main circuit fluid temperature;

[0011] Add the feedforward value of the valve opening and the feedback value of the valve opening to obtain the valve opening value XPoint, and control the cooling water flow regulating valve, the bypass flow regulating valve of the main circuit cooler, and the branch flow regulating valve of the main circuit cooler respectively according to the valve opening value to realize the temperature regulation of the main circuit of the thermal-hydraulic experimental system.

[0012] As a possible design, in the above valve opening prediction model, the heating power of the experimental branch, the fluid flow rate at the primary side inlet of the cooler, the fluid temperature at the primary side inlet of the cooler, and the fluid temperature at the cooling water inlet are used as input parameters, and the valve opening value is used as the output result.

[0013] As a possible design, the above valve opening feedback value is obtained using the PID control algorithm.

[0014] As a possible design, the control of the above cooling water flow regulating valve is specifically to adjust the opening of the cooling water flow regulating valve, and the adjustment range is 0 ≤ XB < XA ≤ 1;

[0015] When XPoint ≤ XB, the opening of the cooling water flow regulating valve remains XB;

[0016] When XB < XPoint < XA, the opening of the cooling water flow regulating valve is XPoint;

[0017] When XA ≤ XPoint, the opening of the cooling water flow regulating valve remains XA.

[0018] As a possible design, the control of the above bypass flow regulating valve of the circuit cooler is specifically to adjust the opening of the bypass flow regulating valve of the circuit cooler, and the adjustment range is 0 ≤ XE < XF ≤ 1;

[0019] When (1 - Xpoint) ≤ XE, the opening of the cooling water flow regulating valve remains XE;

[0020] When XE < (1 - Xpoint) < XF, the opening of the cooling water flow regulating valve is (1 - Xpoint);

[0021] When XF ≤ (1 - Xpoint), the opening of the cooling water flow regulating valve remains at XF.

[0022] As a possible design, the control of the flow regulating valve in the main circuit cooler branch specifically adjusts the opening of the flow regulating valve in the main circuit cooler branch, and the adjustment range is 0 ≤ XD < XC ≤ 1;

[0023] When XPoint ≤ XD, the opening of the flow regulating valve in the main circuit cooler branch remains at XD;

[0024] When XD < XPoint < XC, the opening of the flow regulating valve in the main circuit cooler branch is XPoint;

[0025] When XC ≤ XPoint, the opening of the flow regulating valve in the main circuit cooler branch remains at XC.

[0026] A temperature control system for the main circuit of a thermal - hydraulic experiment system, which is applied to a thermal - hydraulic experiment system, includes

[0027] A first parameter acquisition module, configured to acquire historical data of the thermal - hydraulic experiment system, where the historical data includes the heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, the temperature of the cooling water inlet fluid, and the valve opening value;

[0028] A model training module, configured to train a valve opening prediction model to be trained using the heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, the temperature of the cooling water inlet fluid, and the valve opening value, and obtain a trained valve opening prediction model;

[0029] A second parameter acquisition module, configured to acquire the real - time heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, and the temperature of the cooling water inlet fluid of the thermal - hydraulic experiment system;

[0030] A prediction module, which inputs the real - time heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, and the temperature of the cooling water inlet fluid into the valve opening prediction model, and predicts the feed - forward value of the valve opening;

[0031] A third parameter acquisition module, configured to acquire the temperature of the main circuit fluid in real - time;

[0032] A first calculation module, configured to calculate the feedback value of the valve opening according to the deviation between the temperature of the main circuit fluid and the target value of the temperature of the main circuit fluid;

[0033] A second calculation module is used to add the valve opening feedforward value and the valve opening feedback value to obtain the valve opening value;

[0034] The control module is connected to the thermal hydraulic experiment system, and controls the opening of the cooling water flow control valve, the main circuit cooler bypass flow control valve and the main circuit cooler branch flow control valve according to the valve opening value, so as to control the temperature of the main circuit of the thermal hydraulic experiment system.

[0035] A host device comprising

[0036] Memory for storing computer programs;

[0037] The processor is used to implement the temperature control method of the main loop of a thermal hydraulic experiment system as described above when executing the computer program.

[0038] A computer program product includes a computer program / instruction, wherein the computer program / instruction, when executed by a processor, implements the steps of the temperature control method of the main loop of a thermal hydraulic experimental system.

[0039] A computer-readable storage medium stores computer-executable instructions, which, when loaded and executed by a processor, implement a temperature control method for a main circuit of a thermal hydraulic experiment system as described above.

[0040] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0041] Compared with the traditional control method, the present invention introduces the experimental body heating power as the input of the main loop temperature feedforward controller based on artificial intelligence, which can achieve rapid response to the power change of the thermal hydraulic experimental system with large hysteresis, and effectively avoid the problem of drastic fluctuation of the main loop temperature control caused by system hysteresis when the experimental branch has a large range of power changes; since the primary side inlet flow of the cooler, the primary side inlet temperature of the cooler, and the cooling water temperature are introduced as the input of the valve opening prediction model, the nonlinear characteristics of the heat exchanger are taken into account, and therefore, the control accuracy of the temperature value can be effectively improved; the present invention introduces split-range control, which can realize the coupling control of the main loop cooler bypass flow regulating valve and the main loop cooler branch flow regulating valve when adjusting the main loop temperature, and can maintain the relative stability of the main loop flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0043] Figure 1 This is a circuit diagram of the thermal hydraulic experiment system;

[0044] Figure 2 This is the control principle diagram of the main circuit temperature of the thermal hydraulic experiment system;

[0045] Figure 3 It is the control logic diagram of the split-range controller;

[0046] Figure 4 Training diagram for the AI-based main loop temperature feedforward controller prediction model.

[0047] Marks and corresponding parts names in the attached drawings:

[0048] 1- voltage regulator; 2- main circulation pump; 3- experimental branch flow regulating valve; 4- experimental body; 5- experimental main circuit flow regulating valve; 6- mixer; 7- cooler; 8- cooling water flow regulating valve; 9- main circuit cooler bypass flow regulating valve; 10- main circuit cooler branch flow regulating valve. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with examples and drawings. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. If specific conditions are not specified in the examples, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0050] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0051] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0052] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0054] A person of ordinary skill in the art can understand that all or part of the steps in realizing the above-mentioned facts and methods can be completed by instructing the relevant hardware through a program, and the program involved or the program described can be stored in a computer-readable storage medium. When the program is executed, it includes the following steps: At this time, the corresponding method steps are derived, and the storage medium can be ROM / RAM, a disk, an optical disk, etc.

[0055] Since the flow, temperature, heating power, etc. on the experimental branch often change according to the working condition requirements during the thermal hydraulic experiment, in order to better provide the experimental body with suitable inlet temperature adjustment, it is often necessary to control the main circuit of the thermal hydraulic experiment system to maintain a relatively stable temperature, and in order to maintain the stability of the main circulation pump, it is also necessary to adjust the main circuit flow rate fluctuation range when the main circuit temperature is adjusted. Therefore, this is inconsistent with the condition that the system heat source (body heating power) often changes. For this reason, it is necessary to continuously adjust the cooling water flow, the bypass flow of the main circuit cooler, and the branch flow of the main circuit cooler to adjust the main circuit temperature. However, since the thermal hydraulic experiment system has the characteristics of nonlinearity and large hysteresis, it is relatively difficult to maintain the stability of the main circuit of the thermal hydraulic experiment system. The present invention provides a temperature control method for the main circuit of a thermal hydraulic experiment system to solve the above problems, maintain the main circuit of the thermal hydraulic experiment system to maintain relative stability during the experiment, and the main circuit flow rate does not fluctuate much, thereby improving the reliability and efficiency of experimental research.

[0056] Reference Figure 1 , Figure 1 The thermal hydraulic experimental system is only an example, and the temperature control method of the present invention is applicable to any thermal hydraulic experimental system.

[0057] First, refer to Figure 2 The present invention provides a temperature control method for the main circuit of a thermal hydraulic experiment system, comprising:

[0058] S1. Collect historical data of the thermal hydraulic experiment system, wherein the historical data includes the heating power of the experimental branch, the fluid flow rate at the primary inlet of the cooler, the fluid temperature at the primary inlet of the cooler, the fluid temperature at the cooling water inlet and the valve opening value.

[0059] The inventor has found that in the process of thermal hydraulic experiment, the flow, temperature, heating power, etc. on the experimental branch often change according to the working condition requirements. In order to better provide suitable inlet temperature regulation for the experimental body, it is often necessary to control the main circuit of the thermal hydraulic experiment system to maintain a relatively stable temperature, and in order to keep the main circulation pump stable, it is also necessary to adjust the main circuit flow fluctuation range when the main circuit temperature is adjusted. Therefore, this is inconsistent with the condition that the system heat source (body heating power) often changes. For this reason, it is necessary to continuously adjust the cooling water flow, the main circuit cooler bypass flow, and the main circuit cooler branch flow to adjust the main circuit temperature, and the thermal hydraulic experiment system has the characteristics of nonlinearity and large hysteresis. And using the experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature, and the cooling water inlet fluid temperature as input, the main circuit temperature feedforward controller is used to predict the valve opening feedforward value, and the valve opening value with high accuracy and actual results can be obtained, and the prediction of the valve opening value can be realized, and then the regulation of the main circuit temperature can be realized.

[0060] S2, reference Figure 4 The valve opening prediction model to be trained is trained by using the experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature, the cooling water inlet fluid temperature and the valve opening value to obtain a trained valve opening prediction model.

[0061] Preferably, the valve opening prediction model adopts an artificial neural network algorithm or a convolutional neural algorithm.

[0062] Artificial neural network algorithms or convolutional neural algorithms have significant advantages in processing nonlinear relationships and complex data patterns, and are suitable for the multivariable, nonlinear coupled control characteristics of thermal hydraulic experimental systems. First, artificial neural networks (ANN) and convolutional neural networks (CNN) can learn and simulate such complex nonlinear relationships through weighted connections of multi-layer nodes and nonlinear activation functions, which enables them to more accurately predict the valve opening feedforward value under different input conditions, thereby improving control accuracy; second, they can automatically adjust weights through training to achieve self-adaptation to system changes. With the accumulation of historical data, the model can be continuously optimized through retraining to adapt to changes in system parameters or new operating conditions, ensuring continuous optimization of the control effect; third, convolutional neural networks perform well in processing image data. Although images are not directly processed here, their local connections and weight sharing mechanisms are also applicable to processing data with spatial or time series characteristics, such as the change of fluid flow at the primary inlet of the cooler over time, which helps the model extract key features from the input data, reduce redundant information, and improve prediction efficiency; fourth, through sufficient training, the neural network model can generalize to unseen data, which means that even in the face of slight changes in experimental conditions, the model can provide reliable predictions, especially changes in the heating power of the experimental branch have a more direct impact on the temperature of the experimental main loop. The use of neural network models is crucial to maintaining the stability and control accuracy of the experimental system; fifth, the structure of neural networks, especially CNN, is suitable for parallel computing, which can significantly improve computing efficiency when processing large amounts of data. For real-time control systems, fast response is the key.

[0063] In some embodiments of the present invention, in the above-mentioned valve opening prediction model, the experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature and the cooling water inlet fluid temperature are used as input parameters, and the valve opening value is used as the output result.

[0064] S3. The real-time experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature and the cooling water inlet fluid temperature are used as input parameters of the valve opening prediction model to obtain the valve opening feedforward value in real time.

[0065] S4. Obtain the valve opening feedback value according to the deviation between the main circuit fluid temperature and the target value of the main circuit fluid temperature.

[0066] In some embodiments of the present invention, the above valve opening feedback value is obtained by using a PID control algorithm.

[0067] It is used to monitor in real time the deviation between the main circuit fluid temperature and the target temperature. Through the combination of proportional, integral, and differential terms, it can effectively reduce the steady-state error, suppress oscillations, and accelerate the response speed, ensuring that the system stably and accurately reaches the set temperature.

[0068] S5. Add the valve opening feedforward value and the valve opening feedback value to obtain the valve opening value XPoint, and control the cooling water flow regulating valve, the bypass flow regulating valve of the main circuit cooler, and the branch flow regulating valve of the main circuit cooler respectively according to the valve opening value, so as to realize the temperature regulation of the main circuit of the thermal-hydraulic experiment system.

[0069] The specific control of the cooling water flow regulating valve, the bypass flow regulating valve of the main circuit cooler, and the branch flow regulating valve of the main circuit cooler in this step adopts a split-range control strategy to maintain the temperature of the main circuit of the thermal-hydraulic test relatively constant and the main circuit flow fluctuates little.

[0070] In some embodiments of the present invention, the specific control of the above cooling water flow regulating valve is to adjust the opening of the cooling water flow regulating valve, and the adjustment range is 0 ≤ XB < XA ≤ 1;

[0071] When XPoint ≤ XB, the opening of the cooling water flow regulating valve remains XB;

[0072] When XB < XPoint < XA, the opening of the cooling water flow regulating valve is XPoint;

[0073] When XA ≤ XPoint, the opening of the cooling water flow regulating valve remains XA.

[0074] In some embodiments of the present invention, the specific control of the above bypass flow regulating valve of the circuit cooler is to adjust the opening of the bypass flow regulating valve of the circuit cooler, and the adjustment range is 0 ≤ XE < XF ≤ 1;

[0075] When (1 - Xpoint) ≤ XE, the opening of the cooling water flow regulating valve remains XE;

[0076] When XE < (1 - Xpoint) < XF, the opening of the cooling water flow regulating valve is (1 - Xpoint);

[0077] When XF ≤ (1 - Xpoint), the opening of the cooling water flow regulating valve remains XF.

[0078] In some embodiments of the present invention, the control of the flow regulating valve of the main circuit cooler branch specifically adjusts the opening degree of the flow regulating valve of the main circuit cooler branch, and the adjustment range is 0 ≤ XD < XC ≤ 1;

[0079] When XPoint ≤ XD, the opening degree of the flow regulating valve of the main circuit cooler branch remains XD;

[0080] When XD < XPoint < XC, the opening degree of the flow regulating valve of the main circuit cooler branch is XPoint;

[0081] When XC ≤ XPoint, the opening degree of the flow regulating valve of the main circuit cooler branch remains XC.

[0082] The present invention can achieve the automatic control of the main circuit temperature through automatic control means according to different heating power conditions of the experimental branches.

[0083] In a second aspect, the present invention provides a temperature control system for the main circuit of a thermal-hydraulic experimental system, which is applied to a thermal-hydraulic experimental system and includes

[0084] A first parameter acquisition module for acquiring historical data of the thermal-hydraulic experimental system, wherein the historical data includes the heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, the temperature of the cooling water inlet fluid, and the valve opening value;

[0085] A model training module for training a valve opening prediction model to be trained using the heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, the temperature of the cooling water inlet fluid, and the valve opening value, and obtaining a trained valve opening prediction model;

[0086] A second parameter acquisition module for acquiring the real-time heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, and the temperature of the cooling water inlet fluid of the thermal-hydraulic experimental system;

[0087] A prediction module for inputting the real-time heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, and the temperature of the cooling water inlet fluid into the valve opening prediction model to predict the feedforward value of the valve opening;

[0088] A third parameter acquisition module for acquiring the main circuit fluid temperature in real time;

[0089] A first calculation module for calculating the feedback value of the valve opening according to the deviation between the main circuit fluid temperature and the target value of the main circuit fluid temperature;

[0090] A second calculation module, configured to add the feedforward value of the valve opening and the feedback value of the valve opening to obtain the valve opening value;

[0091] A regulation module, connected to the thermal-hydraulic experimental system, controls the opening degrees of a cooling water flow regulating valve, a bypass flow regulating valve of the primary loop cooler, and a branch flow regulating valve of the primary loop cooler according to the valve opening value, so as to regulate the temperature of the primary loop of the thermal-hydraulic experimental system.

[0092] Preferably, the above prediction module includes a primary loop temperature feedforward controller, configured to receive the real-time heating power of the experimental branch, the flow rate of the fluid at the inlet of the primary side of the cooler, the temperature of the fluid at the inlet of the primary side of the cooler, and the temperature of the cooling water at the inlet, and internally provided with a valve opening prediction model to output the predicted feedforward value of the valve opening.

[0093] Preferably, a heating power measuring point is arranged on the pipeline of the experimental branch of the thermal-hydraulic experimental system, temperature measuring points and flow measuring points are arranged on the pipeline at the inlet of the primary side of the cooler, a temperature measuring point is arranged on the pipeline after the mixture of the outlet cooler branch of the primary side of the cooler and the cooler bypass to measure the temperature of the fluid in the primary loop, and a cooling water temperature measuring point is arranged on the pipeline at the inlet of the secondary side of the cooler to accumulate historical data and real-time data. The above heating power measuring point, temperature measuring point, and flow measuring point can be any existing measuring device. The first parameter acquisition module and the second parameter acquisition module both include the above measuring points.

[0094] Preferably, the above regulation module includes a split-range controller and a valve controller, and controls the valve controller by inputting the valve opening value into the split-range controller, so as to control the cooling water flow regulating valve, the bypass flow regulating valve of the primary loop cooler, and the branch flow regulating valve of the primary loop cooler, and finally realize the regulation of the valve opening.

[0095] Preferably, with reference to Figure 3 , the control of the cooling water flow regulating valve is specifically that the split-range controller limits the valve opening value in a limiter and then gives it as the opening degree of the cooling water flow regulating valve, and the adjustment range is 0 ≤ XB < XA ≤ 1;

[0096] When XPoint ≤ XB, the opening degree of the cooling water flow regulating valve remains XB;

[0097] When XB < XPoint < XA, the opening degree of the cooling water flow regulating valve is XPoint;

[0098] When XA ≤ XPoint, the opening degree of the cooling water flow regulating valve remains XA;

[0099] The control of the bypass flow regulating valve of the circuit cooler is specifically carried out by a split-range controller. After limiting the 1-Xpoint input in the limiter, it is given as the opening of the bypass flow regulating valve of the main circuit cooler, and the adjustment range is 0 ≤ XE < XF ≤ 1;

[0100] When (1 - Xpoint) ≤ XE, the opening of the cooling water flow regulating valve remains XE;

[0101] When XE < (1 - Xpoint) < XF, the opening of the cooling water flow regulating valve is (1 - Xpoint);

[0102] When XF ≤ (1 - Xpoint), the opening of the cooling water flow regulating valve remains XF;

[0103] The control of the branch flow regulating valve of the main circuit cooler is specifically carried out by a split-range controller. After limiting the valve opening value in the limiter, it is given as the opening of the branch flow regulating valve of the main circuit cooler, and the adjustment range is 0 ≤ XD < XC ≤ 1;

[0104] When XPoint ≤ XD, the opening of the branch flow regulating valve of the main circuit cooler remains XD;

[0105] When XD < XPoint < XC, the opening of the branch flow regulating valve of the main circuit cooler is XPoint;

[0106] When XC ≤ XPoint, the opening of the branch flow regulating valve of the main circuit cooler remains XC.

[0107] Thirdly, the present invention provides a mainframe device, including

[0108] a memory for storing a computer program;

[0109] a processor for implementing the temperature control method of the main circuit of a thermal-hydraulic experiment system as described in any one of claims 1 to 6 when executing the computer program.

[0110] Fourthly, the present invention provides a computer program product, including computer programs / instructions, and when the computer programs / instructions are executed by a processor, the steps of the temperature control method of the main circuit of a thermal-hydraulic experiment system as described in any one of claims 1 to 6 are implemented.

[0111] Fifthly, the present invention provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are loaded and executed by a processor, the temperature control method of the main circuit of a thermal-hydraulic experiment system as described in any one of claims 1 to 6 is implemented.

[0112] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temperature control method for the main circuit of a thermal hydraulic experiment system, characterized in that: including Collecting historical data of the thermal-hydraulic experiment system, where the historical data includes the heating power of the experimental branch, the fluid flow rate at the inlet of the primary side of the cooler, the fluid temperature at the inlet of the primary side of the cooler, the fluid temperature at the inlet of the cooling water, and the valve opening value; Training the valve opening prediction model to be trained using the heating power of the experimental branch, the fluid flow rate at the inlet of the primary side of the cooler, the fluid temperature at the inlet of the primary side of the cooler, the fluid temperature at the inlet of the cooling water, and the valve opening value, and obtaining the trained valve opening prediction model; Taking the real-time heating power of the experimental branch, the fluid flow rate at the inlet of the primary side of the cooler, the fluid temperature at the inlet of the primary side of the cooler, and the fluid temperature at the inlet of the cooling water as the input parameters of the valve opening prediction model, and obtaining the feedforward value of the valve opening through real-time prediction; Obtaining the feedback value of the valve opening according to the deviation between the main circuit fluid temperature and the target value of the main circuit fluid temperature; Adding the feedforward value of the valve opening and the feedback value of the valve opening to obtain the valve opening value XPoint, and controlling the cooling water flow regulating valve, the bypass flow regulating valve of the main circuit cooler, and the branch flow regulating valve of the main circuit cooler respectively according to the valve opening value, so as to realize the temperature regulation of the main circuit of the thermal-hydraulic experiment system.

2. The temperature control method of the main circuit of a thermal hydraulic experiment system according to claim 1 is characterized in that: In the valve opening prediction model, the heating power of the experimental branch, the fluid flow rate at the inlet of the primary side of the cooler, the fluid temperature at the inlet of the primary side of the cooler, and the fluid temperature at the inlet of the cooling water are used as input parameters, and the valve opening value is used as the output result.

3. The temperature control method of the main circuit of a thermal hydraulic experiment system according to claim 1 is characterized in that: The valve opening feedback value is obtained by using the PID control algorithm.

4. The temperature control method of the main circuit of a thermal hydraulic experiment system according to claim 1 is characterized in that: Controlling the cooling water flow regulating valve specifically means adjusting the opening of the cooling water flow regulating valve, and the adjustment range is 0 ≤ XB < XA ≤ 1; When XPoint ≤ XB, the opening of the cooling water flow regulating valve remains XB; When XB < XPoint < XA, the opening of the cooling water flow regulating valve is XPoint; When XA ≤ XPoint, the opening of the cooling water flow regulating valve remains XA.

5. The temperature control method of the main circuit of a thermal hydraulic experiment system according to claim 1 is characterized in that: Controlling the bypass flow regulating valve of the loop cooler specifically means adjusting the opening of the bypass flow regulating valve of the loop cooler, and the adjustment range is 0 ≤ XE < XF ≤ 1; When (1 - Xpoint) ≤ XE, the opening of the cooling water flow regulating valve remains XE; When XE < (1 - Xpoint) < XF, the opening of the cooling water flow regulating valve is (1 - Xpoint); When XF ≤ (1 - Xpoint), the opening of the cooling water flow regulating valve remains XF.

6. The temperature control method of the main circuit of a thermal hydraulic experiment system according to claim 1 is characterized in that: Controlling the branch flow regulating valve of the main circuit cooler specifically means adjusting the opening of the branch flow regulating valve of the main circuit cooler, and the adjustment range is 0 ≤ XD < XC ≤ 1; When XPoint ≤ XD, the opening of the branch flow regulating valve of the main circuit cooler remains XD; When XD < XPoint < XC, the opening of the branch flow regulating valve of the main circuit cooler is XPoint; When XC ≤ XPoint, the opening of the branch flow regulating valve of the main circuit cooler remains XC.

7. A temperature control system for the main circuit of a thermal hydraulic experiment system, characterized in that: Applied to the thermal-hydraulic experiment system, including A first parameter acquisition module is used to acquire historical data of the thermal hydraulic experiment system, wherein the historical data includes the experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature, the cooling water inlet fluid temperature and the valve opening value; A model training module is used to train the valve opening prediction model to be trained by using the experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature, the cooling water inlet fluid temperature and the valve opening value to obtain the trained valve opening prediction model; The second parameter acquisition module is used to obtain the real-time experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature and the cooling water inlet fluid temperature of the thermal hydraulic experimental system; The prediction module inputs the real-time experimental branch heating power, the cooler primary side inlet fluid flow, the cooler primary side inlet fluid temperature and the cooling water inlet fluid temperature into the valve opening prediction model to predict the valve opening feedforward value; The third parameter acquisition module is used to obtain the main circuit fluid temperature in real time; A first calculation module is used to calculate a valve opening feedback value according to a deviation between a main circuit fluid temperature and a main circuit fluid temperature target value; A second calculation module is used to add the valve opening feedforward value and the valve opening feedback value to obtain the valve opening value; The control module is connected to the thermal hydraulic experiment system, and controls the opening of the cooling water flow control valve, the main circuit cooler bypass flow control valve and the main circuit cooler branch flow control valve according to the valve opening value, so as to control the temperature of the main circuit of the thermal hydraulic experiment system.

8. A host device, characterized in that: include Memory for storing computer programs; A processor is used to implement a temperature control method for a main circuit of a thermal hydraulic experimental system as described in any one of claims 1 to 6 when executing the computer program.

9. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by the processor, the steps of the temperature control method of the main circuit of a thermal hydraulic experimental system as described in any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by the processor, a temperature control method for the main circuit of a thermal-hydraulic experimental system as described in any one of claims 1 to 6 is implemented.

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