Temperature rise test system and temperature rise prediction method

Abstract

The application discloses a temperature rise test system and a temperature rise prediction method. The temperature rise test system comprises a current generating module, a power equipment test module, a temperature inspection module, an environment control module, an infrared imaging module, a detection module and an upper computer. The upper computer is used for controlling the size of the current output by the current generating module, and the current generating module is used for providing an experimental current for the power equipment test module. The temperature inspection module is connected with the power equipment test module and the upper computer, and the upper computer is also used for detecting the current value flowing through the power equipment test module, and the temperature inspection module is used for collecting the temperature when the current flows through the power equipment test module. The environment control module and the detection module are connected with the upper computer, and the infrared imaging module is used for measuring the heating condition of the power equipment test module when the current flows through the power equipment test module. The technical scheme of the embodiment of the application can improve the dynamic monitoring of the easy-to-heat position, and improve the effectiveness, accuracy and simplicity of the temperature rise characteristic detection.

Description

Technical Field

[0001] This invention relates to the field of temperature detection technology, and in particular to a temperature rise test system and a temperature rise prediction method. Background Technology

[0002] Traditional substation equipment fault detection often requires partial power outages, which negatively impacts the user experience and increases the risk of switching operations. To prevent frequent operations, multi-sensor online monitoring has become widely used in substations for proactive fault detection. However, while infrared thermography technology is widely used and effective in power systems, it also has some shortcomings. Regular monitoring of heat-prone locations such as electrical switchgear, high-voltage cables and joints, and high-current contacts still requires manual intervention, lacking timely and effective tracking and monitoring methods. This compromises the safety and reliability of the equipment. Furthermore, most infrared thermometers can only test the equipment's condition during a specific operating period and cannot perform dynamic monitoring.

[0003] Furthermore, due to the numerous heat-generating components, types, and influencing factors in power equipment, accurately detecting the heat generation of equipment of different types, in different environments, and with different operating years is quite complex, and the effectiveness and accuracy of such detection are relatively low. Summary of the Invention

[0004] This invention provides a temperature rise testing system and a temperature rise prediction method to improve the dynamic monitoring of easily heated locations and enhance the effectiveness, accuracy, and ease of temperature rise characteristic detection.

[0005] According to one aspect of the present invention, a temperature rise test system is provided, comprising: a current generation module, a power equipment test module, a temperature monitoring module, an environmental control module, an infrared imaging module, a detection module, and a host computer;

[0006] The control terminal of the current generating module is connected to the host computer, which controls the magnitude of the output current. The output terminal of the current generating module is connected to the power equipment testing module, providing experimental current to the power equipment testing module. The temperature monitoring module is connected to both the power equipment testing module and the host computer. The host computer also detects the current flowing through the power equipment testing module. The temperature monitoring module collects the temperature of the power equipment testing module when current flows through it and transmits the temperature to the host computer for storage. The host computer also determines the temperature rise of the power equipment testing module based on the temperature. The environmental control module is connected to the host computer and controls environmental variables. The host computer also detects these environmental variables. The infrared imaging module measures the heat generated by the power equipment testing module when current flows through it.

[0007] The detection module is connected to the power equipment test module and the host computer. The detection module is used to detect the contact resistance of the power equipment test module and the environmental parameters of the environment in which it is located, and transmits the contact resistance and the environmental parameters to the host computer.

[0008] Optionally, the current generating module includes a transformer and a current booster; the output terminal of the current generating module includes a positive output terminal and a negative output terminal.

[0009] The transformer is connected in parallel with the current booster. The input terminal of the transformer is connected to the line voltage, and the output terminal of the current booster serves as the output terminal of the current generating module. The positive output terminal is connected to the input terminal of the power equipment testing module, and the negative output terminal is connected to the output terminal of the power equipment testing module.

[0010] Optionally, the power equipment testing module includes preset power equipment and thermocouples;

[0011] The thermocouple is installed on the outer surface and the current-carrying contact surface of the preset power equipment to collect the temperature of the outer surface and the current-carrying contact surface of the preset power equipment in real time.

[0012] Optionally, the preset power equipment includes at least one of disconnecting switch, current transformer, cable terminal and general cap.

[0013] Optionally, the environmental control module includes a wind speed control unit, a temperature control unit, and a humidity control unit.

[0014] Optionally, the detection module includes a temperature and humidity detection module, a wind speed detection module, and a resistance detection module;

[0015] The temperature and humidity detection module, the wind force detection module, and the resistance detection module are all connected to the host computer.

[0016] Optionally, the host computer includes a control module, a storage module, and a computing module;

[0017] The control module is used to control the magnitude of the output current of the current generating module, the storage module is used to store the temperature value when the current flows through the power equipment test module, and the calculation module is used to calculate the corresponding temperature rise based on the temperature value when the current flows through the power equipment test module, and predict the heating status of the power equipment test module based on the temperature rise.

[0018] According to another aspect of the present invention, a temperature rise prediction method is provided, applied to the temperature rise test system provided in any embodiment of the present invention, the method comprising:

[0019] Obtain the model and technical parameters of the power equipment test module; wherein, the technical parameters include ambient temperature and humidity, rated voltage, maximum operating voltage, rated current, dynamic stability current, 4s thermal stability current, and rated frequency;

[0020] Adjust and control the current value flowing through the power equipment test module;

[0021] The contact resistance of the power equipment test module and the environmental parameters of the surrounding environment are collected.

[0022] Acquire images from the infrared imaging module;

[0023] The temperature rise of the power equipment test module is collected, and the maximum temperature rise is obtained based on the acquired temperature rise data;

[0024] Temperature correction is applied to the obtained contact resistance value;

[0025] Plot the relationship between the contact resistance, the environmental parameters, the current, and the maximum temperature rise.

[0026] The temperature rise of the power equipment test module is predicted based on the relationship diagram.

[0027] Optionally, the power equipment testing module includes preset power equipment and thermocouples; the environmental control module includes a wind speed control unit;

[0028] Before adjusting and controlling the current value flowing through the power equipment test module, the following is also included:

[0029] Determine the wind speed level corresponding to the wind speed provided by the wind speed control unit and the attachment position of the thermocouple of the power equipment;

[0030] After adjusting and controlling the current value flowing through the power equipment test module, the method further includes:

[0031] The wind speed control unit provides the wind speed.

[0032] Optionally, the detection module includes a temperature and humidity detection module, a wind speed detection module, and a resistance detection module;

[0033] The contact resistance of the power equipment test module and environmental parameters of the surrounding environment are collected, including:

[0034] The resistance value of the power equipment test module, wind speed, and ambient temperature and humidity values ​​are collected.

[0035] The technical solution of this invention, through the configuration of a current generating module, a power equipment testing module, a temperature monitoring module, an environmental control module, an infrared imaging module, a detection module, and a host computer, allows the host computer to control the output current of the current generating module. This enables the current generating module to simulate large current changes flowing through the power equipment testing module. The temperature monitoring module detects the temperature of the power equipment testing module when different current magnitudes flow through it. The detection module detects the contact resistance of the power equipment testing module and the environmental parameters of its surroundings. The infrared imaging module measures the heat generated when current flows through the power equipment testing module. Furthermore, the temperature value, contact resistance, environmental parameters, and heat generation are transmitted to the host computer, which performs a fusion analysis of the temperature rise of the power equipment testing module. This allows for a more comprehensive analysis of the correlation between the heating defects of the power equipment testing module and various influencing factors, improving the accuracy and effectiveness of temperature rise characteristic detection. Simultaneously, the host computer can transmit and analyze data in real time, enabling dynamic monitoring of temperature rise characteristics. Moreover, the host computer automates data processing and analysis, reducing the complexity of manual calculation and analysis and improving ease of operation.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of a temperature rise test system provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of another temperature rise test system provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of another temperature rise test system provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of another temperature rise test system provided in an embodiment of the present invention;

[0042] Figure 5 A flowchart of a temperature rise prediction method provided in an embodiment of the present invention;

[0043] Figure 6 It is a standard coordinate graph;

[0044] Figure 7 This is a diagram illustrating a wind force level.

[0045] Figure 8 This is a schematic diagram showing the placement of a thermocouple in a disconnector switch.

[0046] Figure 9 This is a schematic diagram showing the mounting position of a thermocouple in a current transformer.

[0047] Figure 10 A flowchart of another temperature rise prediction method provided in an embodiment of the present invention. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] Figure 1 This is a schematic diagram of a temperature rise test system provided in an embodiment of the present invention, with reference to... Figure 1The temperature rise test system provided in this embodiment of the invention includes a current generating module 10, a power equipment test module 20, a temperature monitoring module 30, an environmental control module 40, an infrared imaging module 50, a detection module 60, and a host computer 70. The control terminal of the current generating module 10 is connected to the host computer 70, which controls the magnitude of the output current. The output terminal of the current generating module 10 is connected to the power equipment test module 20, providing experimental current to the power equipment test module 20. The temperature monitoring module 30 is connected to both the power equipment test module 20 and the host computer 70. The host computer 70 also detects the current flowing through the power equipment test module 20. Module 30 is used to collect the temperature of the power equipment test module 20 when current flows through it, and transmit the temperature to the host computer 70 for storage. The host computer 70 is also used to determine the temperature rise of the power equipment test module 20 based on the temperature. The environmental control module 40 is connected to the host computer 70. The environmental control module 40 is used to control environmental variables. The host computer 70 is also used to detect environmental variables. The infrared imaging module 50 is used to measure the heat generation of the power equipment test module 20 when current flows through it. The detection module 60 is connected to the power equipment test module 20 and the host computer 70. The detection module 60 is used to detect the contact resistance of the power equipment test module 20 and the environmental parameters of the environment in which it is located, and transmit the contact resistance and environmental parameters to the host computer 70.

[0051] Specifically, the input terminal of the current generating module 10 is connected to a 380V line voltage, and the current generating module 10 outputs a current of 0-2000A. The magnitude of the output current is controlled by the host computer 70, and this current is input to the power equipment test module 20 to simulate the temperature rise of the power equipment test module 20 when different currents flow through it. During this process, the host computer 70 can output a control signal, and the environmental control module 40 responds to the control signal by controlling environmental variables, changing the environmental parameters of the power equipment test module 20. The detection module 60 can detect these environmental parameters and the contact resistance of the power equipment test module 20. The infrared imaging module 50 can measure the heat generation of the power equipment test module 20 when different currents flow through it and when it is in different environmental parameters, and the heat-sensitive locations of the power equipment test module 20 can be determined based on the heat generation. The temperature monitoring module 30 can measure the temperature value of the heat-sensitive location of the power equipment test module 20 when different currents flow through it and the environmental parameters are different, and transmit the temperature value to the host computer 70 for storage. The host computer 70 further obtains the temperature rise data based on the temperature value. The different currents can include normal rated current and overcurrent conditions, and the environmental parameters can include temperature, humidity and wind speed, respectively.

[0052] The technical solution of this invention, through the configuration of a current generating module, a power equipment testing module, a temperature monitoring module, an environmental control module, an infrared imaging module, a detection module, and a host computer, allows the host computer to control the output current of the current generating module. This enables the current generating module to simulate large current changes flowing through the power equipment testing module. The temperature monitoring module detects the temperature of the power equipment testing module when different current magnitudes flow through it. The detection module detects the contact resistance of the power equipment testing module and the environmental parameters of its surroundings. The infrared imaging module measures the heat generated when current flows through the power equipment testing module. Furthermore, the temperature value, contact resistance, environmental parameters, and heat generation are transmitted to the host computer, which performs a fusion analysis of the temperature rise of the power equipment testing module. This allows for a more comprehensive analysis of the correlation between the heating defects of the power equipment testing module and various influencing factors, improving the accuracy and effectiveness of temperature rise characteristic detection. Simultaneously, the host computer can transmit and analyze data in real time, enabling dynamic monitoring of temperature rise characteristics. Moreover, the host computer automates data processing and analysis, reducing the complexity of manual calculation and analysis and improving ease of operation.

[0053] Figure 2 This is a schematic diagram of another temperature rise test system provided in an embodiment of the present invention, with reference to... Figure 2 Based on the above embodiments, the current generating module 10 includes a transformer 101 and a current booster 102; the output terminal of the current generating module 10 includes a positive output terminal and a negative output terminal; the transformer 101 and the current booster 102 are connected in parallel, the input terminal of the transformer 101 is connected to the line voltage, and the output terminal of the current booster 102 serves as the output terminal of the current generating module 10; the positive output terminal is connected to the input terminal of the power equipment test module 20, and the negative output terminal is connected to the output terminal of the power equipment test module 20.

[0054] Transformer 101 is used to convert the 380V line voltage into a suitable output voltage; current booster 102 is used to increase the current and enhance the current capacity of the system. Its working principle is based on the principle of electromagnetic induction, which generates an electromotive force in the iron core through a changing magnetic field, thereby generating a current in the winding, making the output current greater than the input current.

[0055] Specifically, the input terminal of transformer 101 is connected to a 380V line voltage. The current is boosted by transformer 101 and current booster 102, ultimately outputting a current of 0-2000A. This setup can simulate high-current conditions for testing and verification of related equipment.

[0056] Continue to refer to Figure 2Optionally, the current generating module 10 also includes a resistor R and a capacitor C. The resistor R is used for circuit protection. For example, the resistor R can be a varistor, whose impedance becomes very small when the voltage exceeds its breakdown voltage, allowing it to conduct directly and quickly conduct the high voltage to ground, thereby protecting other components in the circuit from damage. The capacitor C is used for filtering, making the output current signal more stable.

[0057] Figure 3 This is a schematic diagram of another temperature rise test system provided in an embodiment of the present invention, with reference to... Figure 3 Based on the above embodiments, the power equipment test module 20 includes a preset power equipment and a thermocouple 202; the thermocouple 202 is disposed on the outer surface and the current-carrying contact surface of the preset power equipment, and is used to collect the temperature of the outer surface and the current-carrying contact surface of the preset power equipment in real time.

[0058] Specifically, thermocouple 202 can be understood as connecting two wires made of different metals or alloys to form a circuit. When the temperature of the object being measured changes, the temperature difference between the two metals also changes, thereby generating a thermoelectric electromotive force. This thermoelectric electromotive force is transmitted to temperature monitoring module 30. After amplification and processing, temperature monitoring module 30 can output an electrical signal proportional to the temperature, which is then accurately displayed on temperature monitoring module 30 in real time.

[0059] The technical solution of this invention, by incorporating thermocouples, offers a fast response speed, enabling rapid detection of temperature changes and providing reliable temperature measurement. Furthermore, it features a simple structure and low cost. The thermocouples transmit the thermoelectric potential to the temperature monitoring module, which then converts the thermoelectric potential into an electrical signal proportional to the temperature, thereby achieving high-precision temperature measurement and improving system safety and performance.

[0060] Continue to refer to Figure 3 Optionally, the preset power equipment includes at least one of disconnecting switch 201, current transformer 203, cable terminal and general cap.

[0061] Among them, the disconnecting switch 201 is a switching device used in power systems, mainly used to isolate circuits during the inspection or maintenance of electrical equipment to ensure safety. The current transformer 203 is an electrical device used to measure current or voltage, converting high current or high voltage to low current or low voltage through the principle of electromagnetic induction, facilitating measurement and equipment protection. Cable terminals are devices for connecting cables and other electrical equipment, providing reliable electrical connections, ensuring good contact between cables and electrical equipment, and preventing electrical faults. The insulation protection device is an electrical equipment protection device, mainly used for the insulation protection of high-voltage switchgear.

[0062] Optionally, the power equipment test module 20 uses a high-current test lead with a 2000A current carrying capacity and a cross-sectional area of ​​400 square millimeters to connect with the current generating module 10 to form a circuit.

[0063] Figure 4 This is a schematic diagram of another temperature rise test system provided in an embodiment of the present invention, with reference to... Figure 4 Based on the above embodiments, the environmental control module 40 includes a wind speed control unit 401, a temperature control unit 402, and a humidity control unit 403.

[0064] The wind speed control unit 401 is used to control the ambient wind speed. For example, the wind speed control unit 401 may include a blower. The temperature control unit 402 is used to control the ambient temperature, and the humidity control unit 403 is used to control the ambient humidity. The ambient temperature and humidity can be constantly regulated by a temperature and humidity control system.

[0065] Optionally, continue to refer to Figure 4 The detection module 60 includes a temperature and humidity detection module 601, a wind speed detection module 602, and a resistance detection module 603; the temperature and humidity detection module 601, the wind speed detection module 602, and the resistance detection module 603 are all connected to the host computer.

[0066] Specifically, the temperature and humidity detection module 601 is used to detect the ambient temperature and humidity, the wind speed detection module 602 is used to detect the ambient wind speed, and the resistance detection module 603 is used to detect the contact resistance of the power equipment test module 20. These temperature, humidity, wind speed, and contact resistance values ​​are then transmitted to the host computer 70.

[0067] Optionally, continue to refer to Figure 4 The host computer 70 includes a control module 701, a storage module 702, and a calculation module 703. The control module 701 is used to control the magnitude of the output current of the current generating module 10, the storage module 702 is used to store the temperature value when the power equipment test module 20 is flowing with current, and the calculation module 703 is used to calculate the corresponding temperature rise based on the temperature value when the power equipment test module 20 is flowing with current, and predict the heating status of the power equipment test module based on the temperature rise.

[0068] Figure 5 A flowchart of a temperature rise prediction method provided in an embodiment of the present invention can be applied to the temperature rise test system provided in any embodiment of the present invention. (Refer to...) Figure 5 Based on the above embodiments, the temperature rise prediction method includes:

[0069] S101. Obtain the model and technical parameters of the power equipment test module; among which, the technical parameters include the ambient temperature and humidity, rated voltage, maximum operating voltage, rated current, dynamic stability current, 4s thermal stability current, and rated frequency.

[0070] S102, Adjust and control the current value flowing through the power equipment test module.

[0071] Specifically, a current is applied to the power equipment testing module, gradually increasing the current from 100A to 2000A in preset steps, where the preset step can be 50A. During this process, the environmental control module can remain inactive.

[0072] Alternatively, the current can be fixed at 1250A, and environmental parameters can be changed through the environmental control module.

[0073] S103. Collect the contact resistance of the power equipment test module and the environmental parameters of the environment in which it is located.

[0074] Specifically, the contact resistance of the power equipment test module and the stable values ​​of the environmental parameters of the environment in which it is located are collected.

[0075] S104. Acquire images from the infrared imaging module.

[0076] Specifically, images are acquired from the infrared imaging module, and the acquired overall infrared images are analyzed to ensure that the overall heat generation meets the design specifications.

[0077] S105. Collect the temperature rise of the power equipment test module and obtain the maximum temperature rise based on the acquired temperature rise data.

[0078] Specifically, the temperature rise data at various points on the power equipment test module is automatically recorded every 10 seconds, continuing until the thermocouple temperature rise change Δt ≤ 1.0℃, at which point steady-state temperature rise is considered to have been reached. Furthermore, the acquired temperature rise data is processed to obtain the maximum temperature rise at various points on the power equipment test module.

[0079] S106. Perform temperature correction on the obtained contact resistance value.

[0080] Specifically, the formula for calculating the contact resistance R1 is as follows:

[0081] R1 = R c +R f +R p ;

[0082] Among them, R c For a lumped resistor, R f R is the film resistance. p It represents the resistance of a conductor.

[0083] Understandably, since temperature affects the resistivity of materials, different correction formulas are needed for different materials to correct the contact resistance back to the contact resistance at normal temperature, ensuring that the contact resistance is the preset value.

[0084] S107. Draw the relationship graphs of contact resistance, environmental parameters, current and maximum temperature rise respectively.

[0085] For example, Figure 6 For a standard coordinate graph, refer to Figure 6 The effects of individual factors such as contact resistance, environmental parameters, and current on the maximum temperature rise at each point are plotted graphically. Then, environmental parameters and current are used as independent variables, and the stable temperature rise at each measurement point is used as the dependent variable to plot a three-dimensional surface.

[0086] S108. Predict the temperature rise of the power equipment test module based on the relationship diagram.

[0087] Specifically, using environmental parameters and current as independent variables and the stable temperature rise at each measurement point as the dependent variable, a three-dimensional surface is plotted. Furthermore, the data is fitted to obtain a temperature rise prediction formula, which can be expressed by the following formula:

[0088] T = f(v, I)

[0089] Where T represents temperature, v represents environmental parameters, and I represents current.

[0090] The technical solution of this invention enables integrated analysis of the temperature rise of power equipment test modules, thereby providing a more comprehensive analysis of the correlation between heating defects in the test modules and various influencing factors, and improving the accuracy and effectiveness of temperature rise characteristic detection. Simultaneously, the host computer can transmit and analyze data in real time, enabling dynamic monitoring of temperature rise characteristics. Furthermore, the host computer can automate data processing and analysis, reducing the complexity of manual calculation and analysis and improving ease of operation.

[0091] Optionally, the power equipment testing module includes preset power equipment and thermocouples; the environmental control module includes a wind speed control unit;

[0092] Before adjusting and controlling the current value flowing through the power equipment test module, the following is also included:

[0093] Determine the wind speed level corresponding to the wind speed provided by the wind speed control unit and the attachment position of the thermocouples of the electrical equipment.

[0094] Specifically, wind speed levels are classified according to wind speed magnitude. For example, Figure 7 This is a diagram illustrating wind force levels. (For reference) Figure 7 Wind force levels include calm, light wind, gentle wind, and strong wind. Figure 8 This is a schematic diagram showing the placement of a thermocouple in a disconnector switch. (Reference) Figure 8 The thermocouples are attached at the following positions from left to right: the conductive rod, the contact, and the contact finger. Figure 9 This is a schematic diagram of the thermocouple mounting position for a current transformer, for reference. Figure 9 The thermocouples are attached at the following locations from left to right: the terminal block, the outer casing, and the fastening bolts.

[0095] After adjusting and controlling the current value flowing through the power equipment test module, the following is also included:

[0096] The wind speed control unit provides the wind speed.

[0097] Optionally, the detection module includes a temperature and humidity detection module, a wind speed detection module, and a resistance detection module;

[0098] The contact resistance of the power equipment test module and environmental parameters of the surrounding environment are collected, including:

[0099] The system collects data on the contact resistance, wind speed, and ambient temperature and humidity of the power equipment test module.

[0100] Figure 10 A flowchart of another temperature rise prediction method provided in an embodiment of the present invention is shown below. Figure 10 Based on the above embodiments, the temperature rise prediction method includes:

[0101] S201. Obtain the technical parameters of the circuit equipment.

[0102] This step can be specifically understood as: obtaining the model and technical parameters of the power equipment test module; among which, the technical parameters include the ambient temperature and humidity, rated voltage, maximum operating voltage, rated current, dynamic stability current, 4s thermal stability current, and rated frequency.

[0103] S202. Determine the wind speed level and the thermocouple attachment position.

[0104] This step can be understood as: determining the wind speed level corresponding to the wind speed provided by the wind speed control unit and the attachment position of the thermocouple of the power equipment.

[0105] S203. Apply current and adjust the fan.

[0106] This step can be specifically understood as: adjusting and controlling the current value flowing through the power equipment test module, and controlling the wind speed control unit to provide the wind speed.

[0107] S204: Collect wind speed, contact resistance, and thermocouple temperature data.

[0108] S205. Determine the wind speed and wind level.

[0109] This step can be understood as: collecting the wind speed data from the power equipment test module and determining the wind force level.

[0110] S206, Process and obtain the highest temperature rise at various locations.

[0111] This step can be understood as: collecting the temperature rise of the power equipment test module and obtaining the maximum temperature rise based on the acquired temperature rise data.

[0112] S207, Contact resistance value correction.

[0113] This step can be specifically understood as: performing temperature correction on the obtained contact resistance value.

[0114] S208. Draw a graph showing the relationship between wind speed, current, contact resistance, and temperature rise.

[0115] This step can be understood as: drawing graphs showing the relationship between contact resistance, environmental parameters, current and maximum temperature rise.

[0116] S209. Fit the data into an empirical formula to predict the temperature rise.

[0117] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0118] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A temperature rise prediction method characterized by, The system is used in a temperature rise test system, which includes: a current generation module, a power equipment test module, a temperature monitoring module, an environmental control module, an infrared imaging module, a detection module, and a host computer. The control terminal of the current generating module is connected to the host computer, which controls the magnitude of the output current. The output terminal of the current generating module is connected to the power equipment testing module, providing experimental current to the power equipment testing module. The temperature monitoring module is connected to both the power equipment testing module and the host computer. The host computer also detects the current flowing through the power equipment testing module. The temperature monitoring module collects the temperature of the power equipment testing module when current flows through it and transmits the temperature to the host computer for storage. The host computer also determines the temperature rise of the power equipment testing module based on the temperature. The environmental control module is connected to the host computer and controls environmental variables. The host computer also detects these environmental variables. The infrared imaging module measures the heat generated by the power equipment testing module when current flows through it. The detection module is connected to the power equipment test module and the host computer. The detection module is used to detect the contact resistance of the power equipment test module and the environmental parameters of the environment in which it is located, and transmits the contact resistance and the environmental parameters to the host computer. The method includes: Obtain the model and technical parameters of the power equipment test module; wherein, the technical parameters include ambient temperature and humidity, rated voltage, maximum operating voltage, rated current, dynamic stability current, 4s thermal stability current, and rated frequency; Adjust and control the current value flowing through the power equipment test module; The contact resistance of the power equipment test module and the environmental parameters of the surrounding environment are collected. Acquire images from the infrared imaging module; The temperature rise of the power equipment test module is collected, and the maximum temperature rise is obtained based on the acquired temperature rise data; Temperature correction is applied to the obtained contact resistance value; Plot the relationship between the contact resistance, the environmental parameters, the current, and the maximum temperature rise. The temperature rise of the power equipment test module is predicted based on the relationship diagram.

2. The temperature rise prediction method of claim 1, wherein The current generating module includes a transformer and a current booster; the output terminal of the current generating module includes a positive output terminal and a negative output terminal. The transformer is connected in parallel with the current booster. The input terminal of the transformer is connected to the line voltage, and the output terminal of the current booster serves as the output terminal of the current generating module. The positive output terminal is connected to the input terminal of the power equipment testing module, and the negative output terminal is connected to the output terminal of the power equipment testing module.

3. The temperature rise prediction method of claim 1, wherein The power equipment testing module includes pre-set power equipment and thermocouples; The thermocouple is installed on the outer surface and the current-carrying contact surface of the preset power equipment to collect the temperature of the outer surface and the current-carrying contact surface of the preset power equipment in real time.

4. The temperature rise prediction method of claim 3, wherein The preset power equipment includes at least one of disconnecting switches, current transformers, cable terminals, and cable caps.

5. The temperature rise prediction method of claim 1, wherein The environmental control module includes a wind speed control unit, a temperature control unit, and a humidity control unit.

6. The temperature rise prediction method of claim 1, wherein The detection module includes a temperature and humidity detection module, a wind speed detection module, and a resistance detection module; The temperature and humidity detection module, the wind force detection module, and the resistance detection module are all connected to the host computer.

7. The temperature rise prediction method of claim 1, wherein The host computer includes a control module, a storage module, and a computing module; The control module is used to control the magnitude of the output current of the current generating module, the storage module is used to store the temperature value when the current flows through the power equipment test module, and the calculation module is used to calculate the corresponding temperature rise based on the temperature value when the current flows through the power equipment test module, and predict the heating status of the power equipment test module based on the temperature rise.

8. The temperature rise prediction method of claim 1, wherein The power equipment testing module includes pre-set power equipment and thermocouples; the environmental control module includes a wind speed control unit. Before adjusting and controlling the current value flowing through the power equipment test module, the following is also included: Determine the wind speed level corresponding to the wind speed provided by the wind speed control unit and the attachment position of the thermocouple of the power equipment; After adjusting and controlling the current value flowing through the power equipment test module, the method further includes: The wind speed control unit provides the wind speed.

9. The temperature rise prediction method of claim 1, wherein The detection module includes a temperature and humidity detection module, a wind speed detection module, and a resistance detection module; The contact resistance of the power equipment test module and environmental parameters of the surrounding environment are collected, including: The resistance value of the power equipment test module, wind speed, and ambient temperature and humidity values ​​are collected.

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