Ground insulation resistance detection method, comprehensive test circuit and upper computer

Abstract

The invention provides a ground insulation resistance value detection method, a comprehensive test circuit and an upper computer, and the method comprises the steps: controlling the state of a configuration frame through a display interface, and setting a target resistance value; and controlling a target relay in the resistor matrix to be closed according to the target resistance value, and starting the high-voltage power supply, so that an insulation resistor corresponding to the target resistance value is connected to the comprehensive test circuit, and a ground insulation resistance value is generated. According to the technical scheme provided by the embodiment of the invention, free combination of the insulation resistors is realized in a resistor matrix mode, various target resistance value setting modes are provided, the target resistance value can be quickly set in various setting modes, the flexibility of the target resistance value is improved, meanwhile, the target resistance value setting efficiency is improved, and the cost is reduced. Therefore, the ground insulation resistance value can be quickly obtained, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and in particular to a method for detecting insulation resistance to ground, a comprehensive test circuit and a host computer. Background Art

[0002] The energy storage industry has developed rapidly in recent years, with new energy storage becoming an increasingly important pillar in my country's efforts to build a new energy and power system. The safety and reliability of battery systems are crucial for the energy storage industry. To prevent electrical failures and potential safety hazards, insulation resistance testing is necessary. However, existing technologies for testing insulation resistance to ground are limited in test conditions and pose a safety risk. Summary of the Invention

[0003] In view of the above problems, the embodiments of the present invention provide a method for detecting insulation resistance to ground, a comprehensive test circuit and a host computer to solve the problems in the prior art of limited test conditions and low safety for detecting insulation resistance to ground.

[0004] In a first aspect, an embodiment of the present invention provides a method for detecting insulation resistance to ground, which is applied to a host computer, wherein the host computer is electrically connected to a comprehensive test circuit, wherein the comprehensive test circuit includes an electrical test circuit and a resistance matrix, wherein the resistance matrix includes a high-voltage power supply, multiple relays, and multiple insulation resistors; the method includes:

[0005] Control the status of the configuration box through the display interface and set the target resistance value;

[0006] The target relay in the resistance matrix is controlled to close according to the target resistance value, and the high-voltage power supply is started to connect the insulation resistance corresponding to the target resistance value to the comprehensive test circuit to generate the insulation resistance value to ground.

[0007] In a possible implementation, the host computer and the integrated test circuit are electrically connected via an RS485 serial port, and communication transmission between the host computer and the integrated test circuit is achieved based on a Modbus remote terminal unit RTU communication protocol.

[0008] In a possible implementation, the insulation resistors in the resistance matrix are connected in series, and the target resistance value is used to indicate the total resistance value of at least one insulation resistor connected to the comprehensive test circuit.

[0009] In a possible implementation, the configuration box includes a resistance configuration check box, a resistance configuration radio button, and a resistance value edit box.

[0010] In a possible implementation, the resistance configuration check box includes at least one resistance value selection box, at least one part selection box, and a full selection box;

[0011] The resistance value selection box is used to control the state of a single insulation resistance in the resistance matrix; the partial selection box is used to control the state of a group of insulation resistances in the resistance matrix, and each group of insulation resistances includes at least two insulation resistances; the all-selection box is used to control the state of all insulation resistances in the resistance matrix.

[0012] In a possible implementation manner, the resistance value selection box, the partial selection box, and the all-selection box respectively have a selected state and an unselected state;

[0013] Controlling the state of the configuration box through the display interface to set the target resistance value includes:

[0014] Setting at least one of the resistance value selection boxes to the selected state and setting the target resistance value; or,

[0015] Setting at least one of the resistance value selection boxes and at least one of the partial selection boxes to the selected state and setting the target resistance value; or,

[0016] Setting at least one of the partial selection boxes to the selected state and setting the target resistance value; or,

[0017] Setting the all-selection box to the selected state, setting at least one of the resistance value selection boxes and at least one of the partial selection boxes to the unselected state, and setting the target resistance value.

[0018] In a possible implementation manner, the resistance configuration radio box has a selected state and an unselected state;

[0019] Controlling the state of the configuration box through the display interface to set the target resistance value includes:

[0020] Each resistance configuration radio box is used to control the state of the insulation resistances in an insulation resistance set; different resistance configuration radio boxes are respectively used to control different insulation resistance sets to form different target resistance values.

[0021] In a possible implementation manner, controlling the state of the configuration box through the display interface to set the target resistance value includes:

[0022] Entering the target resistance value in the resistance value editing box and setting the target resistance value.

[0023] In a second aspect, an embodiment of the present invention provides a comprehensive test circuit, and the comprehensive test circuit includes an electrical test circuit and a resistance matrix, and the electrical test circuit is electrically connected to the resistance matrix;

[0024] The resistance matrix includes a high-voltage power supply, a plurality of relays, and a plurality of insulation resistances, and different relays respectively control different insulation resistances; the resistance matrix is used to control the insulation resistances through the relays to set the target resistance value.

[0025] In a third aspect, an embodiment of the present invention provides a host computer, which includes one or more processors, a memory, and one or more computer programs. Wherein, the one or more computer programs are stored in the memory, and the one or more computer programs include instructions. When the instructions are executed by the host computer, the host computer executes the method for detecting the insulation resistance value to the ground as described in the first aspect or any possible implementation manner of the first aspect.

[0026] In the technical solution provided by the embodiment of the present invention, the free combination of insulation resistances is realized through the resistance matrix, and multiple setting methods for the target resistance value are provided. The target resistance value can be quickly set under multiple setting methods, which improves the flexibility of the target resistance value. At the same time, the setting efficiency of the target resistance value is improved, so that the insulation resistance value to the ground can be quickly obtained, and the test efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flowchart of a method for detecting the insulation resistance value to the ground provided by an embodiment of the present invention.

[0028] Figure 2 It is a connection schematic diagram of a comprehensive test circuit provided by an embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of a display interface provided by an embodiment of the present invention.

[0030] Figure 4 It is a connection schematic diagram of a resistance matrix provided by an embodiment of the present invention.

[0031] Figure 5 It is a schematic diagram of a host computer provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Figure 1 It is a flowchart of a method for detecting the insulation resistance value to the ground provided by an embodiment of the present invention. As Figure 1 shown, the method includes:

[0034] Step 101: Control the state of the configuration box through the display interface and set the target resistance value.

[0035] In the embodiments of the present invention, each step is executed by a host computer.

[0036] In this step, the Universal Serial Bus (USB) interface of the host computer is electrically connected to the RS485 serial port of the comprehensive test circuit through a USB to RS485 converter. Communication transmission is realized between the host computer and the comprehensive test circuit based on the Modbus Remote Terminal Unit (RTU) communication protocol. The comprehensive test circuit includes an electrical test circuit and a resistance matrix. The resistance matrix includes a high-voltage power supply, a plurality of relays, and a plurality of insulation resistors. The insulation resistors in the resistance matrix are connected in series, and the target resistance value is used to indicate the total resistance value of at least one insulation resistor connected to the comprehensive test circuit.

[0037] In the embodiments of the present invention, the Modbus RTU communication protocol adopts a master-slave mode, where the host computer is the master device and the comprehensive test circuit is the slave device. Table 1 shows the communication transmission data when the host computer and the comprehensive test circuit perform communication transmission through the Modbus RTU communication protocol.

[0038] Table 1

[0039]

[0040] As shown in Table 1 above, the communication transmission data includes an address, a register length, a data description, and communication data. Among them, the address represents the complete address of the starting register, and the register length represents the number of registers. An address of 0x0001 and a register length of 0x0001 mean starting from the starting register at address 0x0001 and reading one register. The data descriptions corresponding to Serial Number 1 and Serial Number 2 are both 16 bits in total, and feedback the execution status of the 1 - 16 bit Digital Output (DO) output instruction. 1 indicates that a resistor is connected. The communication data includes transmitted data (i.e., TX) and received data (i.e., RX). The transmitted data corresponding to Serial Number 1 includes 01 03 00 01 00 01, and the received data includes 01 03 02 00 01. The transmitted data corresponding to Serial Number 2 includes 01 1000 01 00 01 02XX XX, where XX XX is the check value of the Cyclic Redundancy Check (CRC), which is used to check the communication data to ensure the data is error-free.

[0041] Figure 2 It is a connection schematic diagram of a comprehensive test circuit provided by the embodiments of the present invention, as Figure 2As shown, the integrated test circuit includes an electrical test circuit and a resistor matrix, which are electrically connected to the resistor matrix. The resistor matrix includes a high-voltage power supply, multiple relays, and multiple insulation resistors. Different relays control different insulation resistors. The resistor matrix is used to control the insulation resistance via the relays to set the target resistance value.

[0042] In an embodiment of the present invention, an electrical test circuit includes a first terminal, a second terminal, a third terminal, a power module, a CAN power detection module, a passive node module, a temperature measurement module, and a signal feedback module. The first terminal is electrically connected to the power module, the second terminal is electrically connected to the third terminal, the passive node module, and the signal feedback module, the third terminal is electrically connected to the CAN power detection module, the passive node module, and the temperature measurement module, and the signal feedback module is electrically connected to the power module and the passive node module. The power module is used to supply power to the electrical test circuit. The CAN power detection module is used to monitor voltage and current to implement voltage and current protection for the circuit. The passive node module is used to control the on / off state of the circuit. The temperature measurement module is used to perform temperature detection and implement over-temperature protection for the circuit. The signal feedback module is used to control the on / off state of the electrical test circuit. In the signal feedback module, ordinary relays replace the main positive relay and main negative relay to control the on / off state of the positive and negative power supply terminals, respectively, to control the on / off state of the electrical test circuit. In this embodiment of the present invention, LED indicators are provided in the CAN power detection module, passive node module, and signal feedback module. The LED indicator status indicates whether the branch in which the indicator is located is open or disconnected. When the LED indicator is on, it indicates that the branch in which the indicator is located is open; when the LED indicator is off, it indicates that the branch in which the indicator is located is disconnected.

[0043] In the signal feedback module, ordinary relays are used instead of the main positive relay, main negative relay and pre-charge relay, which simplifies the electrical wiring inside the high-voltage box, reduces the volume of the high-voltage box, and simplifies the test process.

[0044] Figure 3 A schematic diagram of a display interface provided by an embodiment of the present invention is shown as follows: Figure 3 As shown, the display interface includes a configuration box, which includes a resistor configuration checkbox, a resistor configuration radio button, and a resistance value edit box. The resistor configuration checkbox includes at least one resistance value selection box, at least one partial selection box, and a full selection box. The resistance value selection box, partial selection box, and full selection box have selected and unselected states, respectively. The resistance value selection box controls the state of a single insulation resistor in the resistor matrix; the partial selection box controls the state of a single group of insulation resistors in the resistor matrix, each group of insulation resistors including at least two insulation resistors; and the full selection box controls the state of all insulation resistors in the resistor matrix. The number of insulation resistors in each group can be set based on actual conditions. For example, each group of resistances includes five insulation resistors.

[0045] Figure 4 A connection diagram of a resistor matrix provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the resistor matrix includes a high-voltage power supply, 15 relays, and 15 insulation resistors. Each relay controls the state of an insulation resistor, and each relay is connected in parallel with its corresponding insulation resistor. The high-voltage power supply is 1500V, the 15 relays are K1 to K15, and the 15 insulation resistors are R1 to R15. The resistance values of the 15 insulation resistors are 22.5kΩ, 33.8kΩ, 45.0kΩ, 60.0kΩ, 75.0kΩ, 90.0kΩ, 112.5kΩ, 120.0kΩ, 120.0kΩ, 150.0kΩ, 375.0kΩ, 562.5kΩ, 750.0kΩ, 1125.0kΩ, and 1500.0kΩ, respectively. For simplicity, the insulation resistors in the resistor matrix are numbered 1 to 15. In practical applications, the insulation resistance values in the resistance matrix can be set based on actual conditions, and the embodiment of the present invention does not limit this.

[0046] like Figure 3 As shown, the resistor configuration checkbox consists of three sections: the first section, the second section, and the third section. The insulation resistors in the resistor matrix are divided into three groups, each containing five resistors. The first group includes resistors numbered 1 through 5, the second group includes resistors numbered 6 through 10, and the third group includes resistors numbered 11 through 15. The first section controls the status of the first group, the second section controls the status of the second group, and the third section controls the status of the third group.

[0047] It should be noted that the resistor configuration checkbox includes 15 resistance value selection boxes, 3 partial selection boxes, and a full selection box. The 15 resistance value selection boxes control the status of insulation resistors numbered 1 to 15, with each resistance value selection box controlling the status of a single insulation resistor. The 3 partial selection boxes control the status of insulation resistors numbered 1 to 5, 6 to 10, and 11 to 15, with each partial selection box controlling the status of five insulation resistors. The full selection box controls the status of all insulation resistors numbered 1 to 15.

[0048] As an alternative, set at least one resistance value selection box to the selected state and set the target resistance value. For example, set the resistance value selection box corresponding to the insulation resistance numbered 1, i.e., the insulation resistance of 22.5 kΩ, to the selected state, and set the resistance value selection boxes corresponding to the insulation resistances numbered 2 to 15, the three part selection boxes, and the all-selection box to the unselected state. Then the target resistance value is 22.5 kΩ.

[0049] As another alternative, set at least one resistance value selection box and at least one part selection box to the selected state and set the target resistance value. For example, set the resistance value selection box corresponding to the insulation resistance numbered 1, i.e., the insulation resistance of 22.5 kΩ, and the second part selection box to the selected state, and set the resistance value selection boxes corresponding to the insulation resistances numbered 2 to 15, the first part selection box, the third part selection box, and the all-selection box to the unselected state. Then the target resistance value is the total resistance value of the insulation resistance corresponding to the insulation resistance numbered 1 and the insulation resistance set corresponding to the second part selection box, i.e., 615 kΩ.

[0050] As another alternative, set at least one part selection box to the selected state and set the target resistance value. For example, set the first part selection box to the selected state, and set the resistance value selection boxes corresponding to the insulation resistances numbered 1 to 15, the second part selection box, the third part selection box, and the all-selection box to the unselected state. Then the target resistance value is the total resistance value of the insulation resistance set corresponding to the first part selection box, i.e., 236.3 kΩ.

[0051] As another alternative, set the all-selection box to the selected state, set the resistance value selection boxes corresponding to the insulation resistances numbered 1 to 15 and the three part selection boxes to the unselected state, and set the target resistance value. At this time, the target resistance value is the total resistance value of all the insulation resistances in the resistance matrix, i.e., 5163.8 kΩ.

[0052] In the embodiments of the present invention, each resistor configuration radio box is used to control the state of the insulation resistors in an insulation resistance set. Different resistor configuration radio boxes are respectively used to control different insulation resistance sets to form different target resistance values. The insulation resistance set can be an empty set; or, the insulation resistance set includes 1 insulation resistor; or, the insulation resistance set includes multiple insulation resistors. That is to say, the resistor configuration radio box can control the state of only one insulation resistor or the state of multiple insulation resistors.

[0053] It should be noted that when the set of insulation resistances is an empty set, all the insulation resistances in the resistance matrix are not selected. When the set of insulation resistances includes one insulation resistance, the host computer can control the state of one insulation resistance through the resistance configuration radio box. When the set of insulation resistances includes multiple insulation resistances, the host computer can control the states of multiple insulation resistances through the resistance configuration radio box. At this time, the numbers of each insulation resistance are separated by symbols to distinguish different insulation resistance numbers. And, no symbol needs to be reserved after the number of the last insulation resistance in the set of insulation resistances. For example, the numbers of different insulation resistances can be separated by a space character, a semicolon or a comma.

[0054] In practical applications, testers can set the resistance value in the resistance configuration radio box based on test experience. For example, the set of insulation resistances controlled by the resistance configuration radio box is set as the set of insulation resistances with higher usage frequencies. In the embodiments of the present invention, by selecting the resistance configuration radio box, the corresponding set of insulation resistances can be quickly selected, so as to quickly set the target resistance value, and the setting efficiency of the target resistance value is improved.

[0055] In the embodiments of the present invention, the display interface is further provided with a resistance value editing box and a setting button. The user inputs the target resistance value in the resistance value editing box and clicks the setting button, and the host computer responds to the operation of the user clicking the setting button to set the target resistance value.

[0056] Optionally, the display interface is further provided with a refresh button. When the user clicks the refresh button, the host computer responds to the operation of the user clicking the refresh button to refresh the display interface.

[0057] Optionally, the display interface is further provided with a save button. After the user switches the target resistance value, the user clicks the save button; the host computer responds to the operation of the user clicking the save button to complete the switching of the target resistance value. Based on this, the quick switching of the target resistance value in the resistance matrix can be realized, and the flexibility of the resistance matrix is improved.

[0058] Optionally, the display interface is further provided with a default value button. When the user clicks the default value button, the host computer responds to the operation of the user clicking the default value button to restore the resistance values of the insulation resistances in the resistance matrix to the default values.

[0059] In the embodiments of the present invention, the RS485 serial port supports communication link settings such as serial port setting, baud rate setting, data bit setting, stop bit setting, and parity check.

[0060] Step 10 : Control the target relay in the resistance matrix to close according to the target resistance value, and start the high-voltage power supply to connect the insulation resistance corresponding to the target resistance value to the comprehensive test circuit to generate the insulation resistance value to the ground.

[0061] In this step, the insulation resistance to the ground includes the insulation resistance of the positive electrode to the ground or the insulation resistance of the negative electrode to the ground. In the embodiment of the present invention, one of the insulation resistances of the positive electrode to the ground and the negative electrode to the ground is set as a fixed value to detect the other insulation resistance. As Figure 4 shown, R16 is the insulation resistance of the negative electrode to the ground. At this time, the insulation resistance of the negative electrode to the ground is the resistance value of R16, that is, the insulation resistance of the negative electrode to the ground is a fixed value to detect the insulation resistance of the positive electrode to the ground. Optionally, Figure 4 the positive electrode and the negative electrode of the power supply shown are reversely connected. At this time, R16 is the insulation resistance of the positive electrode to the ground, and the insulation resistance of the positive electrode to the ground is the resistance value of R16, that is, the insulation resistance of the positive electrode to the ground is a fixed value to detect the insulation resistance of the negative electrode to the ground.

[0062] In the embodiment of the present invention, the user can switch the target resistance value based on actual usage requirements. It should be noted that when switching the target resistance value, the high-voltage power supply needs to be turned off first, all the relays in the resistance matrix need to be disconnected, and then the target relay in the resistance matrix is controlled to close according to the new target resistance value, and the high-voltage power supply is started to connect the insulation resistance corresponding to the new target resistance value to the comprehensive test circuit to ensure the safety of the test.

[0063] In the technical solution provided by the embodiment of the present invention, the free combination of insulation resistances is realized through the resistance matrix, and various setting methods of the target resistance value are provided. The target resistance value can be quickly set in various setting methods, which improves the flexibility of the target resistance value. At the same time, the setting efficiency of the target resistance value is improved, so that the insulation resistance to the ground can be quickly obtained, and the test efficiency is improved.

[0064] The embodiment of the present invention provides a computer-readable storage medium. The computer-readable storage medium includes a stored program. When the program runs, it controls the device where the computer-readable storage medium is located to execute the steps of the above-mentioned embodiment of the method for detecting the insulation resistance to the ground. For specific descriptions, reference can be made to the embodiment of the method for detecting the insulation resistance to the ground.

[0065] Figure 5 The following is a schematic diagram of a host computer provided by the embodiment of the present invention. As Figure 5 shown, the host computer 3 of this embodiment includes: a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and operable on the processor 301. When the processor 301 executes the computer program 303, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor 301 executes the computer program 303, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0066] The host computer 3 can be an electronic device such as a desktop computer, a notebook, a palm computer, and a cloud server. The host computer 3 may include, but is not limited to, the processor 301 and the memory 302. Those skilled in the art can understand,Figure 5 This is only an example of the host computer 3 and does not constitute a limitation on the host computer 3. It may include more or fewer components than those shown in the figure, or different components.

[0067] The processor 301 may be a central processing unit (CPU for short), or other general-purpose processors, digital signal processors (DSP for short), application specific integrated circuits (ASIC for short), field-programmable gate arrays (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0068] The memory 302 may be an internal storage unit of the host computer 3. For example, the hard disk or memory of the host computer 3. The memory 302 may also be an external storage device of the host computer 3. For example, a plug-in hard disk equipped on the host computer 3, a smart media card (SMC for short), a secure digital (SD) card, a flash card, etc. The memory 302 may also include both an internal storage unit and an external storage device of the host computer 3. The memory 302 is used to store computer programs and other programs and data required by the electronic device.

[0069] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0070] As mentioned above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for detecting the ground insulation resistance value, characterized in that, Applied to the host computer, the host computer is electrically connected to the comprehensive test circuit, and the comprehensive test circuit includes an electrical test circuit and a resistor matrix. The resistor matrix includes a high-voltage power supply, a plurality of relays, and a plurality of insulation resistors. The method includes: Controlling the state of the configuration box through the display interface to set the target resistance value. Controlling the closing of the target relay in the resistor matrix according to the target resistance value, and starting the high-voltage power supply to connect the insulation resistor corresponding to the target resistance value to the comprehensive test circuit to generate the insulation resistance value to the ground.

2. The method according to claim 1, wherein The universal serial bus (USB) interface of the host computer is electrically connected to the RS485 serial port of the comprehensive test circuit through a USB to RS485 converter, and communication transmission is realized between the host computer and the comprehensive test circuit based on the Modbus remote terminal unit (RTU) communication protocol.

3. The method according to claim 1, characterized in that, The insulation resistors in the resistor matrix are connected in series, and the target resistance value is used to indicate the total resistance value of at least one insulation resistor connected to the comprehensive test circuit.

4. The method according to claim 1, wherein The configuration box includes a resistor configuration checkbox, a resistor configuration radio button, and a resistance value editing box.

5. The method according to claim 4, characterized in that The resistor configuration checkbox includes at least one resistance value selection box, at least one partial selection box, and a full selection box. The resistance value selection box is used to control the state of a single insulation resistor in the resistor matrix; the partial selection box is used to control the state of a single group of insulation resistors in the resistor matrix, and each group of insulation resistors includes at least two insulation resistors; the full selection box is used to control the state of all insulation resistors in the resistor matrix.

6. The method according to claim 5, wherein The resistance value selection box, the partial selection box, and the full selection box each have a selected state and an unselected state. Controlling the state of the configuration box through the display interface to set the target resistance value includes: Setting at least one of the resistance value selection boxes to the selected state and setting the target resistance value; or, Setting at least one of the resistance value selection boxes and at least one of the partial selection boxes to the selected state and setting the target resistance value; or, Setting at least one of the partial selection boxes to the selected state and setting the target resistance value; or, Setting the full selection box to the selected state, setting at least one of the resistance value selection boxes and at least one of the partial selection boxes to the unselected state, and setting the target resistance value.

7. The method according to claim 4, wherein The resistor configuration radio button has a selected state and an unselected state. Controlling the state of the configuration box through the display interface to set the target resistance value includes: Each resistor configuration radio button is used to control the state of the insulation resistors in an insulation resistor set; different resistor configuration radio buttons are respectively used to control different insulation resistor sets to form different target resistance values.

8. The method according to claim 4, wherein Controlling the state of the configuration box through the display interface to set the target resistance value includes: Entering the target resistance value in the resistance value editing box to set the target resistance value.

9. A comprehensive test circuit, characterized in that, The comprehensive test circuit includes an electrical test circuit and a resistor matrix, and the electrical test circuit is electrically connected to the resistor matrix. The resistance matrix includes a high-voltage power supply, a plurality of relays, and a plurality of insulation resistors, and different relays respectively control different insulation resistors; the resistance matrix is used to control the insulation resistors through the relays to set the target resistance value.

10. An upper computer, characterized in that, The host computer includes one or more processors, a memory, and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions that, when executed by the host computer, cause the host computer to execute the method for detecting the insulation resistance value to the ground according to any one of claims 1-8.

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