Temperature control method and device

Abstract

The temperature control method comprises the steps that the temperature of a first fluid in a double-circulation system is obtained, the double-circulation system comprises the first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than that of the second fluid, and the first fluid is used for exchanging heat with the second fluid; determining a second target temperature of the second fluid according to the deviation between the temperature of the first fluid and the first target temperature; and according to the deviation between the second target temperature and the temperature of the second fluid, the temperature of the second fluid is controlled, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is smaller than a preset temperature threshold value. According to the temperature control method provided by the embodiment of the invention, the accuracy and the response speed of temperature control of the first fluid are improved, and the accuracy and the reliability of a wet leakage test of the photovoltaic module are ensured.

Description

Technical Field

[0001] The present disclosure relates to the field of temperature control technology, and in particular to a temperature control method and device. Background Art

[0002] The PV module wet leakage test is an important test used to evaluate the electrical insulation performance of PV modules in a humid environment, so as to determine whether the PV modules can maintain good insulation performance under humid conditions to prevent potential electrical safety hazards. For example, wet leakage may cause system failure, reduce power generation efficiency, and even cause harm to personnel and equipment. Through rigorous testing, the safety performance and reliability of PV modules in a humid environment can be ensured, providing guarantee for the stable operation of the PV system.

[0003] At present, the temperature control in the wet leakage test of photovoltaic modules mainly adopts direct water heating or cooling. This method has problems such as low temperature control accuracy, slow response speed and low safety, which seriously affects the accuracy and reliability of wet leakage test. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is: how to improve the accuracy and reliability of wet leakage testing of photovoltaic modules.

[0005] In order to solve the above technical problems, the present disclosure provides a temperature control method, comprising:

[0006] Acquiring the temperature of a first fluid in a dual circulation system, wherein the dual circulation system includes a first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than the specific heat capacity of the second fluid, and the first fluid is used for heat exchange with the second fluid;

[0007] determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature; and

[0008] The temperature of the second fluid is controlled according to the deviation between the second target temperature and the temperature of the second fluid so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0009] In some embodiments, determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature includes:

[0010] When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the second target temperature to be the first preset temperature;

[0011] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the second target temperature to be the second preset temperature; and

[0012] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the second target temperature is determined to be the third preset temperature.

[0013] In some embodiments, the method further comprises:

[0014] A first target flow rate of the first fluid and a second target flow rate of the second fluid are determined according to a deviation between the temperature of the first fluid and the first target temperature.

[0015] In some embodiments, determining a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature includes:

[0016] When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the first target flow rate to be the first preset flow rate and the second target flow rate to be the second preset flow rate;

[0017] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the first target flow rate to be the third preset flow rate and the second target flow rate to be the fourth preset flow rate; and

[0018] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the first target flow rate is determined to be the fifth preset flow rate, and the second target flow rate is determined to be the sixth preset flow rate.

[0019] In some embodiments, obtaining the temperature of the first fluid in the dual circulation system includes: obtaining temperatures collected by a plurality of temperature sensors disposed in a flow path of the first fluid;

[0020] The method further includes:

[0021] The temperatures collected by a plurality of temperature sensors disposed in the flow path of the second fluid are acquired.

[0022] In some embodiments, determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature further includes:

[0023] Detecting temperature difference values ​​of a plurality of independent control areas formed by the first fluid;

[0024] When the temperature difference value is greater than a preset difference value, the heat output of the second fluid is controlled so that the temperature difference value is less than or equal to the preset difference value.

[0025] In some embodiments, the method further comprises:

[0026] According to the deviation between the temperature of the first fluid and the first target temperature and the temperature change rate of the first fluid, the heat absorption of the first fluid is controlled so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0027] In some embodiments, the method further comprises:

[0028] According to the historical temperature of the first fluid, the heat absorption of the first fluid is controlled so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0029] On the other hand, an embodiment of the present disclosure provides a temperature control device, comprising:

[0030] A first fluid temperature acquisition module, which acquires the temperature of the first fluid in the dual circulation system, wherein the dual circulation system includes a first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than the specific heat capacity of the second fluid, and the first fluid is used to exchange heat with the second fluid to provide a temperature and humidity environment required for a wet leakage test of a photovoltaic module;

[0031] A second target temperature determination module, configured to determine a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature; and

[0032] The temperature control module is used to control the temperature of the second fluid according to the deviation between the second target temperature and the temperature of the second fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0033] In some embodiments, the second target temperature determination module is further configured to:

[0034] When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the second target temperature to be the first preset temperature;

[0035] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the second target temperature to be the second preset temperature; and

[0036] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the second target temperature is determined to be the third preset temperature.

[0037] In some embodiments, the apparatus further comprises:

[0038] The flow rate determination module is used to determine a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature.

[0039] In some embodiments, the flow rate determination module is further configured to:

[0040] When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the first target flow rate to be the first preset flow rate and the second target flow rate to be the second preset flow rate;

[0041] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the first target flow rate to be the third preset flow rate and the second target flow rate to be the fourth preset flow rate; and

[0042] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the first target flow rate is determined to be the fifth preset flow rate, and the second target flow rate is determined to be the sixth preset flow rate.

[0043] In some embodiments, the temperature acquisition module is further used to acquire temperatures collected by a plurality of temperature sensors disposed in the flow path of the first fluid;

[0044] The device also includes:

[0045] The second fluid temperature acquisition module is used to acquire temperatures collected by a plurality of temperature sensors arranged in the flow path of the second fluid.

[0046] In some embodiments, the second target temperature determination module is further configured to:

[0047] Detecting temperature difference values ​​of a plurality of independent control areas formed by the first fluid;

[0048] When the temperature difference value is greater than a preset difference value, the heat output of the second fluid is controlled so that the temperature difference value is less than or equal to the preset difference value.

[0049] In some embodiments, the apparatus further comprises:

[0050] The adaptive control module is used to control the heat absorption of the first fluid according to the deviation between the temperature of the first fluid and the first target temperature and the temperature change rate of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0051] In some embodiments, the apparatus further comprises:

[0052] The prediction control module is used to control the heat absorption of the first fluid according to the historical temperature of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0053] On the other hand, an embodiment of the present disclosure provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above method.

[0054] On the other hand, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor.

[0055] On the other hand, an embodiment of the present disclosure provides a computer program product, including a computer program, characterized in that the computer program implements the steps of the above method when executed by a processor.

[0056] Through the above technical scheme, the temperature control method provided by the present invention utilizes a dual circulation system composed of a first fluid and a second fluid to determine the second target temperature of the second fluid according to the deviation between the temperature of the first fluid and the first target temperature; and controls the temperature of the second fluid according to the deviation between the second target temperature and the temperature of the second fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold, thereby improving the accuracy and response speed of the temperature control of the first fluid and ensuring the accuracy and reliability of the wet leakage test of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 is a schematic diagram of an example process of a temperature control method provided by an embodiment of the present invention;

[0059] Figure 2 is a schematic diagram of an example process of a method for determining a second target temperature of a second fluid provided by an embodiment of the present invention;

[0060] Figure 3 is a schematic diagram of an example of a block diagram of a control system corresponding to a temperature control method provided in one embodiment of the present invention;

[0061] Figure 4 is a schematic diagram of an example process of a method for determining a target flow rate of a fluid provided by an embodiment of the present invention;

[0062] Figure 5 is an exemplary schematic diagram of a temperature control device provided by an embodiment of the present invention;

[0063] Figure 6 It is an exemplary schematic diagram of a computer device provided by an embodiment of the present invention.

[0064] Description of reference numerals:

[0065] 1. Conversion unit; 2. Controller; 3. Temperature control actuator; 4. Heat exchanger; 5. Second fluid temperature sensor; 6. First fluid temperature sensor; 501. First fluid temperature acquisition module; 502. Second target temperature determination module; 503. Temperature control module; 600. Computer device; 610. Memory; 620. Processor; 630. Computer program. DETAILED DESCRIPTION

[0066] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0067] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0068] In addition, the words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0069] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0070] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0071] Figure 1 It is a schematic diagram of an example process of a temperature control method provided by an embodiment of the present invention.

[0072] like Figure 1 As shown, the temperature control method according to an embodiment of the present invention includes:

[0073] Step 101, obtaining the temperature of a first fluid in a dual circulation system, wherein the dual circulation system includes a first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than the specific heat capacity of the second fluid, and the first fluid is used for heat exchange with the second fluid;

[0074] Step 102, determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature; and

[0075] Step 103, controlling the temperature of the second fluid according to the deviation between the second target temperature and the temperature of the second fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0076] Advantageously, the first fluid may be water, and the second fluid may be oil, and the oil and water form an oil-water dual circulation system. Optionally, the water circulation system may be an internal circulation system for directly contacting the photovoltaic module to be tested, thereby providing the temperature and humidity environment required for the photovoltaic module wet leakage test, and the oil circulation system may be an external circulation system for controlling the water temperature of the water circulation system.

[0077] The temperature control method according to the embodiment of the present invention utilizes a dual circulation system composed of a first fluid and a second fluid to determine the second target temperature of the second fluid according to the deviation between the temperature of the first fluid and the first target temperature; and controls the temperature of the second fluid according to the deviation between the second target temperature and the temperature of the second fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold, thereby improving the accuracy and response speed of the temperature control of the first fluid and ensuring the accuracy and reliability of the wet leakage test of the photovoltaic module.

[0078] In some embodiments, the preset temperature threshold is an allowable error range.

[0079] In some embodiments, step 101, obtaining the temperature of a first fluid in a dual circulation system, includes: obtaining temperatures collected by a plurality of temperature sensors disposed in a flow path of the first fluid.

[0080] In some embodiments, the temperature control method further includes: acquiring temperatures collected by a plurality of temperature sensors disposed in a flow path of the second fluid.

[0081] After multiple temperature sensors collect temperature data, a corresponding weight may be assigned to each temperature sensor according to the area where it is located, and the temperature collected by each temperature sensor is weighted accordingly to obtain the temperature of the fluid.

[0082] By setting a plurality of high-precision temperature sensors in the flow path of the first fluid and the flow path of the second fluid, the temperature measurement accuracy can be improved. In addition, a distributed temperature acquisition network can be used to monitor the temperature of each part of the dual circulation system in real time, and the Kalman filter algorithm can be used to process the raw data to remove noise in the raw temperature data.

[0083] Figure 2 FIG. 1 is a schematic diagram of an exemplary process of a method for determining a second target temperature of a second fluid provided by an embodiment of the present invention. Figure 2 As shown, in some embodiments, step 102, determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature, includes:

[0084] Step 1021, when the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the second target temperature to be the first preset temperature;

[0085] Step 1022, when the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the second target temperature to be the second preset temperature; and

[0086] Step 1023: when the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, determine the second target temperature to be the third preset temperature.

[0087] For example, the first target temperature is 25°C, the initial temperature of the first fluid is 20.5°C, the first temperature deviation is 1.2°C, the second temperature deviation is 0.3°C, the first preset temperature is 35°C, the second preset temperature is 28°C, and the third preset temperature is 25.5°C:

[0088] In the initial stage, the deviation between the initial temperature of the first fluid and the first target temperature is 4.5°C, which is greater than 1.2°C. At this time, the first preset temperature is 35°C;

[0089] In the middle section, the temperature of the first fluid rises to 23.8°C, at which point the deviation is less than or equal to 1.2°C and greater than 0.3°C, and the second preset temperature is 28°C;

[0090] At the end, the temperature of the first fluid rises to 24.7°C, at which point the deviation is less than or equal to 0.3°C, and the third preset temperature is 25.5°C.

[0091] The above is only an exemplary description. In addition to the above-mentioned step-like mapping relationship for controlling the second target temperature, the second target temperature may also be controlled by a linear or other nonlinear mapping relationship, which will not be described in detail here.

[0092] Figure 3FIG. 1 is a block diagram of a control system corresponding to a temperature control method provided in an embodiment of the present invention. Figure 3 As shown, the control system includes a conversion unit 1 , a controller 2 , a temperature control actuator 3 , a heat exchanger 4 , a second fluid temperature sensor 5 and a first fluid temperature sensor 6 . Wherein, T_w,ref is a first target temperature signal, and the first fluid temperature sensor 6 detects the temperature of the first fluid and outputs the first fluid temperature signal T_w, thereby obtaining a deviation E_w between the temperature of the first fluid and the first target temperature (E_w=T_w,ref-T_w), and the deviation T_w is converted by the conversion unit 1 to obtain a second target temperature T_o,ref (T_o,ref=f(E_w)), wherein the conversion function y=f(x) corresponding to the conversion unit 1 can adopt a corresponding mapping relationship according to actual conditions, for example, a linear or step-shaped function relationship image is adopted, and the deviation E_o between the second target temperature and the temperature of the second fluid is obtained according to the second target temperature T_o,ref and the temperature T_o of the second fluid detected by the second fluid temperature sensor 5, and the control signal U_PID_o obtained by inputting the deviation E_o into the PID controller 2 is used to control the temperature of the second fluid by controlling the temperature control actuator 3, and the second fluid can exchange heat with the first fluid through the heat exchanger 4, so that the deviation between the temperature of the first fluid and the first target temperature is less than the preset temperature threshold. By controlling the temperature of the first fluid and the second fluid in a double closed loop, the temperature can be controlled more accurately and quickly.

[0093] In some embodiments, step 102, determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature, further includes:

[0094] Step 1024, detecting temperature difference values ​​of a plurality of independent control areas formed by the first fluid;

[0095] Step 1025: When the temperature difference value is greater than the preset difference value, control the heat output of the second fluid so that the temperature difference value is less than or equal to the preset difference value.

[0096] For example, the first fluid can be divided into four independent control areas, each area can be equipped with an independent temperature sensor and control loop, and a coordinated control algorithm can be used to balance the temperature of each area. For example, the deviation of each area from the average temperature of each area is calculated, and the heat input is increased or decreased for the area with a larger deviation.

[0097] In some embodiments, the method further comprises:

[0098] Step 104: Determine a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature.

[0099] By setting the flow rates of the first fluid and the second fluid, the temperature control effect on the first fluid can be further improved.

[0100] Figure 4 FIG. 1 is a schematic diagram of an example process of a method for determining a target flow rate of a fluid provided by an embodiment of the present invention. Figure 4 As shown, in some embodiments, step 104, determining a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature, includes:

[0101] Step 1041, when the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the first target flow rate to be the first preset flow rate and the second target flow rate to be the second preset flow rate;

[0102] Step 1042, when the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the first target flow rate to be the third preset flow rate and the second target flow rate to be the fourth preset flow rate; and

[0103] Step 1043, when the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, determine the first target flow rate to be the fifth preset flow rate, and the second target flow rate to be the sixth preset flow rate.

[0104] Similarly, take the first target temperature as 25°C, the initial temperature of the first fluid as 20.5°C, the first temperature deviation as 1.2°C, the second temperature deviation as 0.3°C, the first target flow rate as 80L / min, the second target flow rate as 60L / min, the third target flow rate as 60L / min, the fourth target flow rate as 40L / min, the fifth target flow rate as 40L / min, and the sixth target flow rate as 20L / min as an example:

[0105] In the initial stage, the deviation between the initial temperature of the first fluid and the first target temperature is 4.5°C, which is greater than 1.2°C. At this time, the first target flow rate is 80 L / min and the second target flow rate is 60 L / min.

[0106] In the middle section, the temperature of the first fluid rises to 23.8°C, at which time the third target flow rate is 60 L / min and the fourth target flow rate is 40 L / min;

[0107] At the end, the temperature of the first fluid rises to 24.7° C. At this time, the fifth target flow rate is 40 L / min and the sixth target flow rate is 20 L / min.

[0108] In some embodiments, the flow rate of the first fluid, the flow rate of the second fluid, and the temperature of the second fluid may be adjusted simultaneously according to the deviation between the temperature of the first fluid and the first target temperature, which will not be described in detail herein.

[0109] The above is only an exemplary description. In addition to the above-mentioned step-like mapping relationship for controlling the first target flow rate and the second target flow rate, a linear or other nonlinear mapping relationship may also be used to control the first target flow rate and the second target flow rate, which will not be described in detail here.

[0110] In some embodiments, the method further includes: controlling the heat absorption of the first fluid according to the deviation between the temperature of the first fluid and the first target temperature and the temperature change rate of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0111] Combined with reference Figure 3 Optionally, fuzzy logic can also be used to adjust the PID parameters of the PID controller 2. The implementation steps are as follows:

[0112] PID controller time domain expression:

[0113] Among them, U(t) is the controller output, and its control signal is used to adjust the controlled object; E(t) is the current error, which represents the difference between the set value and the actual value; K p is the proportional gain; K i is the integral gain; K d is the differential gain.

[0114] a. Define fuzzy sets: temperature deviation E(t) of the first fluid and temperature change rate Each is divided into 7 levels (NB, NM, NS, ZO, PS, PM, PB), and the 7 levels correspond to (negative large, negative medium, negative small, zero, positive small, positive medium, positive large);

[0115] Define the membership function: For example, for a small negative error, the function expression can be For small positive errors, the function expression can be μ(E), where μ(E) is the membership function, which indicates the membership of the input variable in a specific fuzzy set, and its value range is [0, 1]. E is the current error value, and ∈ is the set threshold value, which is used to distinguish different types of errors and determines the width of the membership function.

[0116] b. Establish 49 (7*7) fuzzy rules to cover all possible input combinations, where the input is temperature deviation E(t) and temperature change rate

[0117] c. Use Mamdani reasoning method to perform fuzzy reasoning and calculate the activation degree, Among them, μE(E) is the membership degree of the current temperature deviation E(t) in the fuzzy set, is the membership degree of temperature change rate in the fuzzy set.

[0118] d. Use the centroid method to defuzzify and obtain the adjustment value of the PID parameters. For example, for the proportional gain K p , the expression of defuzzification by centroid method can be Among them, μ(K) is the membership degree corresponding to each adjustment value K, which indicates the validity of the adjustment value under the fuzzy rule, K adjust It is the PID parameter adjustment value obtained by the final defuzzification.

[0119] e. Update PID parameters every 100ms, for example, for proportional gain K p , updated proportional gain K p，new =K p +K adjust , where K p，new is the updated proportional gain, K p is the current proportional gain.

[0120] By using the fuzzy PID algorithm, adaptive control of the temperature of the first fluid can be achieved, so that higher precision and stability control can be achieved in a dynamically changing environment, and the control requirements of complex systems can be met.

[0121] In some embodiments, the method further includes: controlling the heat absorption of the first fluid according to the historical temperature of the first fluid so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0122] Combined with reference Figure 3 Optionally, feedforward control may be used to implement predictive control of the temperature of the first fluid. Examples of implementation steps are as follows:

[0123] a. Establish a double-loop system transfer function model.

[0124] b. Based on the historical temperature data, the least squares method can be used to estimate the transfer function model parameters of the dual-loop system.

[0125] c. Predict the temperature change trend in the next 5 minutes based on the model.

[0126] d. Calculate the feedforward control quantity. The feedforward control expression can be U f =K f (E_w), where, U f is the feedforward control output, which represents the control signal based on prediction and is used to adjust the system to reach the target state. fis the feedforward gain, which indicates the response strength of the system to input changes. This parameter can be adjusted according to the system characteristics to obtain the best control effect.

[0127] e. The feedforward control quantity U f It is added to the PID control quantity of controller 2 as the final control output.

[0128] Combining the outputs of feedforward control and feedback control can effectively improve the accuracy and response speed of temperature control, thereby better meeting the requirements of PV module wet leakage testing. This method can significantly reduce temperature deviations caused by system delays and improve overall control performance.

[0129] On the other hand, an embodiment of the present invention provides a temperature control device. Figure 5 FIG. 1 is an exemplary schematic diagram of a temperature control device provided by an embodiment of the present invention. Figure 5 As shown, the device comprises:

[0130] A first fluid temperature acquisition module 501 is used to acquire the temperature of the first fluid in the dual circulation system, wherein the dual circulation system includes a first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than the specific heat capacity of the second fluid, and the first fluid is used to exchange heat with the second fluid to provide a temperature and humidity environment required for a wet leakage test of a photovoltaic module;

[0131] A second target temperature determination module 502, configured to determine a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature; and

[0132] The temperature control module 503 is used to control the temperature of the second fluid according to the deviation between the second target temperature and the temperature of the second fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0133] In some embodiments, the second target temperature determination module 502 is further configured to:

[0134] When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the second target temperature to be the first preset temperature;

[0135] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the second target temperature to be the second preset temperature; and

[0136] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the second target temperature is determined to be the third preset temperature.

[0137] In some embodiments, the apparatus further comprises:

[0138] The flow rate determination module is used to determine a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature.

[0139] In some embodiments, the flow rate determination module is further configured to:

[0140] When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the first target flow rate to be the first preset flow rate and the second target flow rate to be the second preset flow rate;

[0141] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the first target flow rate to be the third preset flow rate and the second target flow rate to be the fourth preset flow rate; and

[0142] When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the first target flow rate is determined to be the fifth preset flow rate, and the second target flow rate is determined to be the sixth preset flow rate.

[0143] In some embodiments, the temperature acquisition module is further used to acquire temperatures collected by a plurality of temperature sensors disposed in the flow path of the first fluid;

[0144] The device also includes:

[0145] The second fluid temperature acquisition module is used to acquire temperatures collected by a plurality of temperature sensors arranged in the flow path of the second fluid.

[0146] In some embodiments, the second target temperature determination module 502 is further configured to:

[0147] Detecting temperature difference values ​​of a plurality of independent control areas formed by the first fluid;

[0148] When the temperature difference value is greater than a preset difference value, the heat output of the second fluid is controlled so that the temperature difference value is less than or equal to the preset difference value.

[0149] In some embodiments, the apparatus further comprises:

[0150] The adaptive control module is used to control the heat absorption of the first fluid according to the deviation between the temperature of the first fluid and the first target temperature and the temperature change rate of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0151] In some embodiments, the apparatus further comprises:

[0152] The prediction control module is used to control the heat absorption of the first fluid according to the historical temperature of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

[0153] In yet another aspect, an embodiment of the present invention provides a computer device. Figure 6 FIG. 1 is an exemplary schematic diagram of a computer device provided by an embodiment of the present invention. Figure 6 As shown, the computer device 600 includes a memory 610, a processor 620, and a computer program 630 stored in the memory 610. The processor 620 executes the computer program 630 to implement the steps of the above method.

[0154] On the other hand, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor.

[0155] On the other hand, an embodiment of the present invention provides a computer program product, including a computer program, which implements the steps of the above method when executed by a processor.

[0156] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0157] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no method or structural conflict.

Claims

1. A temperature control method, characterized in that: include: Acquiring a temperature of a first fluid in a dual circulation system, wherein the dual circulation system includes a first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than the specific heat capacity of the second fluid, and the first fluid is used for heat exchange with the second fluid; determining a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and a first target temperature; and According to the deviation between the second target temperature and the temperature of the second fluid, the temperature of the second fluid is controlled so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

2. The temperature control method according to claim 1, characterized in that: The step of determining the second target temperature of the second fluid according to the deviation between the temperature of the first fluid and the first target temperature includes: When the deviation between the temperature of the first fluid and the first target temperature is greater than a first temperature deviation, determining the second target temperature to be a first preset temperature; When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than a second temperature deviation, determining the second target temperature to be a second preset temperature; and When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the second target temperature is determined to be a third preset temperature.

3. The temperature control method according to claim 1, characterized in that: The method further includes: A first target flow rate of the first fluid and a second target flow rate of the second fluid are determined according to a deviation between the temperature of the first fluid and the first target temperature.

4. The temperature control method according to claim 3, characterized in that: The step of determining a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature includes: When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the first target flow rate to be a first preset flow rate and the second target flow rate to be a second preset flow rate; When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the first target flow rate to be a third preset flow rate and the second target flow rate to be a fourth preset flow rate; and When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the first target flow rate is determined to be a fifth preset flow rate, and the second target flow rate is determined to be a sixth preset flow rate.

5. The temperature control method according to claim 1, characterized in that: The obtaining of the temperature of the first fluid in the dual circulation system comprises: obtaining temperatures collected by a plurality of temperature sensors disposed in a flow path of the first fluid; The method further includes: The temperatures collected by a plurality of temperature sensors disposed in the flow path of the second fluid are acquired.

6. The temperature control method according to claim 2, characterized in that: The step of determining the second target temperature of the second fluid according to the deviation between the temperature of the first fluid and the first target temperature further includes: Detecting temperature difference values ​​of a plurality of independent control areas formed by the first fluid; When the temperature difference value is greater than a preset difference value, the heat output of the second fluid is controlled to make the temperature difference value less than or equal to the preset difference value.

7. The temperature control method according to claim 1, characterized in that: The method further includes: According to the deviation between the temperature of the first fluid and the first target temperature, and the temperature change rate of the first fluid, the heat absorption of the first fluid is controlled so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than the preset temperature threshold.

8. The temperature control method according to claim 1, characterized in that: The method further includes: According to the historical temperature of the first fluid, the heat absorption of the first fluid is controlled so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than the preset temperature threshold.

9. A temperature control device, characterized in that: include: A first fluid temperature acquisition module, which acquires the temperature of the first fluid in the dual circulation system, wherein the dual circulation system includes a first fluid and a second fluid, the specific heat capacity of the first fluid is smaller than the specific heat capacity of the second fluid, and the first fluid is used to exchange heat with the second fluid to provide a temperature and humidity environment required for a photovoltaic module wet leakage test; a second target temperature determination module, configured to determine a second target temperature of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature; and The temperature control module is used to control the temperature of the second fluid according to the deviation between the second target temperature and the temperature of the second fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than a preset temperature threshold.

10. The temperature control device according to claim 9, characterized in that: The second target temperature determination module is further used for: When the deviation between the temperature of the first fluid and the first target temperature is greater than a first temperature deviation, determining the second target temperature to be a first preset temperature; When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than a second temperature deviation, determining the second target temperature to be a second preset temperature; as well as When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the second target temperature is determined to be a third preset temperature.

11. The temperature control device according to claim 9, characterized in that: The device also includes: The flow rate determination module is used to determine a first target flow rate of the first fluid and a second target flow rate of the second fluid according to a deviation between the temperature of the first fluid and the first target temperature.

12. The temperature control device according to claim 11, characterized in that: The flow rate determination module is also used for: When the deviation between the temperature of the first fluid and the first target temperature is greater than the first temperature deviation, determining the first target flow rate to be a first preset flow rate and the second target flow rate to be a second preset flow rate; When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the first temperature deviation and greater than the second temperature deviation, determining the first target flow rate to be a third preset flow rate and the second target flow rate to be a fourth preset flow rate; and When the deviation between the temperature of the first fluid and the first target temperature is less than or equal to the second temperature deviation, the first target flow rate is determined to be a fifth preset flow rate, and the second target flow rate is determined to be a sixth preset flow rate.

13. The temperature control device according to claim 9, characterized in that: The temperature acquisition module is also used to acquire temperatures collected by a plurality of temperature sensors arranged in the flow path of the first fluid; The device also includes: The second fluid temperature acquisition module is used to acquire temperatures collected by a plurality of temperature sensors arranged in the flow path of the second fluid.

14. The temperature control device according to claim 10, characterized in that: The second target temperature determination module is further used for: Detecting temperature difference values ​​of a plurality of independent control areas formed by the first fluid; When the temperature difference value is greater than a preset difference value, the heat output of the second fluid is controlled to make the temperature difference value less than or equal to the preset difference value.

15. The temperature control device according to claim 9, characterized in that: The device also includes: The adaptive control module is used to control the heat absorption of the first fluid according to the deviation between the temperature of the first fluid and the first target temperature and the temperature change rate of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than the preset temperature threshold.

16. The temperature control device according to claim 9, characterized in that: The device also includes: The prediction control module is used to control the heat absorption of the first fluid according to the historical temperature of the first fluid, so that after the second fluid exchanges heat with the first fluid, the deviation between the temperature of the first fluid and the first target temperature is less than the preset temperature threshold.

17. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 8.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

19. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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