A high-voltage disconnector testing device and method

Abstract

The application discloses a high-voltage isolating switch testing device and method, the method comprising: a controller and a display device; the display device is electrically connected with the controller, and is used for receiving a user input fault phenomenon and transmitting the fault phenomenon to the controller; the fault phenomenon at least comprises a closing fault and an opening fault; the controller stores reference points arranged in a first order and acquired according to a high-voltage isolating switch circuit; the controller is used for acquiring a plurality of first reference points associated with the fault phenomenon, and successively issuing detection instructions to the first reference points in the first order; the display device is further used for displaying the detection instructions and receiving a user input detection result corresponding to the detection instructions; and the controller is used for acquiring a fault position of the high-voltage isolating switch circuit according to the detection results of the plurality of first reference points. The technical scheme provided by the application can improve the detection efficiency of the high-voltage isolating switch electric circuit fault.

Description

Technical Field

[0001] This invention relates to the field of power distribution network technology, and in particular to a high-voltage disconnector testing device and method. Background Technology

[0002] High-voltage disconnect switches are the most common electrical equipment in power systems, used to isolate power sources and provide a clear disconnect point between equipment under maintenance and energized equipment. Furthermore, high-voltage disconnect switches, in conjunction with circuit breakers, can perform switching operations according to the required operating modes of the power system, thereby changing the wiring configuration. However, high-voltage disconnect switches are operated most frequently, and their probability of failure is also very high.

[0003] Currently, troubleshooting faults in the electrical circuits of high-voltage disconnect switches relies on manual methods. Furthermore, troubleshooting requires operators to meticulously check each component against electrical drawings and actual wiring. However, these drawings and documents are prone to ambiguity or even loss during management and use. These issues mean that troubleshooting relies entirely on the skills and experience of specialized technicians, resulting in low efficiency, power transmission interruptions, grid power grid stagnation, reduced power supply efficiency, and low safety efficiency, severely impacting socio-economic benefits. Summary of the Invention

[0004] This invention provides a high-voltage disconnector test device and method to improve the detection efficiency of electrical circuit faults in high-voltage disconnectors.

[0005] In a first aspect, embodiments of the present invention provide a high-voltage disconnector test device, comprising: a controller and a display device;

[0006] The display device is electrically connected to the controller and is used to receive fault phenomena input by the user and transmit them to the controller; the fault phenomena include at least closing faults and opening faults;

[0007] The controller stores reference points arranged in a first order based on the high-voltage disconnector circuit; the controller is used to acquire multiple first reference points associated with the fault phenomenon and issue detection commands to the first reference points in the first order.

[0008] The display device is also used to display the detection command and receive the detection result corresponding to the detection command input by the user; the controller is used to obtain the fault location of the high-voltage disconnect switch circuit based on the detection results of the plurality of first reference points.

[0009] Secondly, embodiments of the present invention also provide a high-voltage disconnector test method, including the high-voltage disconnector test apparatus provided in any embodiment of the present invention, comprising:

[0010] The display device receives user input of fault symptoms and transmits them to the controller; the fault symptoms include at least closing faults and opening faults;

[0011] The controller acquires the reference points arranged in the first order based on the high-voltage disconnector circuit;

[0012] The controller acquires multiple first reference points associated with the fault phenomenon and issues detection commands to the first reference points in sequence according to the first order.

[0013] The display device displays the detection command and receives the detection result corresponding to the detection command input by the user;

[0014] The controller obtains the fault location of the high-voltage disconnect switch circuit based on the detection results of the multiple first reference points.

[0015] In this invention, the high-voltage disconnector test device includes a controller and a display device. The display device is electrically connected to the controller and is used to receive fault phenomena input by the user and transmit them to the controller. The fault phenomena include at least closing faults and opening faults. The controller stores reference points arranged in a first order based on the high-voltage disconnector circuit. The controller is used to acquire multiple first reference points associated with the fault phenomena and issue detection commands to the first reference points sequentially according to the first order. The display device is also used to display the detection commands and receive the detection results corresponding to the detection commands input by the user. The controller is used to obtain the fault location of the high-voltage disconnector circuit based on the detection results of multiple first reference points. This embodiment effectively improves the detection efficiency of faults in the electrical circuits of high-voltage disconnectors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-voltage disconnector test device provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of another high-voltage disconnector test device provided in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of a high-voltage disconnector circuit provided in an embodiment of the present invention;

[0019] Figure 4 for Figure 3 A schematic diagram of the structure of a local area of ​​a medium- and high-voltage disconnector circuit;

[0020] Figure 5 This is a closing fault tree diagram provided in an embodiment of the present invention;

[0021] Figure 6 This is a tripping fault tree diagram provided in an embodiment of the present invention;

[0022] Figure 7 This is a flowchart illustrating a high-voltage disconnector testing method provided in an embodiment of the present invention. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0024] The electrical circuit of a high-voltage disconnector is based on the electric operating principle of the disconnector, which arranges various electrical components in the circuit according to certain logical conditions. Each component in the circuit corresponds to the necessary and sufficient conditions in the operating logic. The circuit diagram is logically complex, has many components, and requires various troubleshooting methods. It is often used alternately, making the operation complex and the safety low.

[0025] Currently, fault diagnosis of high-voltage disconnector electrical circuits relies on manual methods. Due to varying skill levels among technicians, problems arise such as unclear troubleshooting strategies, unfamiliarity with blueprints, and the use of incorrect methods. This leads to an increasing trend in troubleshooting time as technician skill levels decline, and the time required for troubleshooting becomes relatively unpredictable. When diagnosing electrical faults in disconnectors, technicians must first consult blueprints to determine the fault location and appropriate troubleshooting methods. However, improper management of these blueprints, as well as damage and illegibility during use, necessitates significant time spent searching for them, with some blueprints even being lost. Furthermore, inconsistent and unscientific troubleshooting methods are employed, sometimes using resistance methods, sometimes voltage methods, and frequent switching of multimeter settings. Using incorrect methods can lead to short circuits, damage to instruments, and even electric shock.

[0026] To address the above problems, embodiments of the present invention provide a high-voltage disconnector test device, such as... Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of a high-voltage disconnector test device provided in an embodiment of the present invention. Figure 2 A schematic diagram of another high-voltage disconnector test device provided in an embodiment of the present invention includes: a controller 11 and a display device 12;

[0027] The display device 12 is electrically connected to the controller 11 and is used to receive fault phenomena input by the user and transmit them to the controller 11; the fault phenomena include at least closing faults and opening faults.

[0028] The controller 11 stores reference points arranged in a first order obtained from the high-voltage disconnector circuit; the controller 11 is used to obtain multiple first reference points associated with the fault phenomenon and issue detection commands to the first reference points in the first order.

[0029] The display device 12 is also used to display the detection command and receive the detection result corresponding to the detection command input by the user; the controller 11 is used to obtain the fault location of the high-voltage disconnect switch circuit based on the detection results of multiple first reference points.

[0030] In this embodiment of the invention, the high-voltage disconnector test device includes a controller and a display device. The display device is electrically connected to the controller and is used to receive fault phenomena input by the user and transmit them to the controller. The fault phenomena include at least closing faults and opening faults. The controller stores reference points arranged in a first order based on the high-voltage disconnector circuit. The controller is used to acquire multiple first reference points associated with the fault phenomena and issue detection commands to the first reference points sequentially according to the first order. The display device is also used to display the detection commands and receive the detection results corresponding to the detection commands input by the user. The controller is used to obtain the fault location of the high-voltage disconnector circuit based on the detection results of multiple first reference points. This embodiment effectively improves the detection efficiency of faults in the electrical circuits of high-voltage disconnectors.

[0031] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] Optionally, the high-voltage disconnector test device may also include: a voice broadcasting device 13; the voice broadcasting device 13 is electrically connected to the controller 11 and is used to broadcast test commands and fault locations via voice. Optionally, the high-voltage disconnector test device may also include a speaker to achieve amplification.

[0033] This embodiment provides a high-voltage disconnector testing device. The main body of the instrument consists of a PLC (Programmable Logic Controller) as the core processing device, an HMI (Hybrid Management Interface) LCD display to show operation commands and troubleshooting results, and an intelligent voice broadcaster. A technical method (resistance method) is used to troubleshoot electrical faults in high-voltage disconnectors. During troubleshooting, the user selects the disconnector fault phenomenon in the instrument, and the instrument automatically generates operation instructions and displays them on the HMI LCD display, gradually guiding the technician to conduct the troubleshooting. Each time, the technician feeds back the troubleshooting results to the instrument. The instrument performs logical analysis based on the feedback results, guiding the next troubleshooting point or generating troubleshooting results, which are then displayed on the LCD display and accompanied by voice broadcast reminders.

[0034] Optionally, the reference points may include a first type of reference point A, a second type of reference point B, a third type of reference point C, and a fourth type of reference point D arranged in a first order; the first reference point includes at least one of the first type of reference point A, the second type of reference point B, the third type of reference point C, and the fourth type of reference point D; each type of reference point includes at least one reference point.

[0035] Optionally, the controller 11 is specifically used to issue a resistance detection command centered on the first reference point; the display device 12 is specifically used to receive the detection result corresponding to the resistance detection command input by the user; the detection result includes a high resistance result and a low resistance result; the resistance measurement value of the high resistance result is greater than the resistance measurement value of the low resistance result; the controller 11 is used to narrow down the range of the fault location based on the detection result.

[0036] Figure 3 This is a schematic diagram of a high-voltage disconnector circuit provided in an embodiment of the present invention. Figure 4 for Figure 3 A schematic diagram of the structure of a partial area 21 of the medium-high voltage disconnector circuit. Optionally, the high-voltage disconnector circuit includes at least: a first branch, a closing branch, and a opening branch; the first branch includes a first button 1TA, a first normally closed switch S2, a second normally closed switch F1, and a first normally open switch Q1 connected in sequence; the closing branch includes a first relay coil KM1, a first sub-switch of a first double-control switch S1, a second relay normally closed switch K2, and a fourth button S4 connected in sequence; the opening branch includes a second relay coil KM2, a second sub-switch of a first double-control switch S1, a first relay normally closed switch K1, and a fifth button S5 connected in sequence; the first normally open switch Q1 of the first branch is electrically connected to the first relay coil KM1 of the closing branch; the first normally open switch Q1 of the first branch is electrically connected to the second relay coil KM1 of the opening branch. 2. Electrical connection; the second relay normally closed switch K2 is also electrically connected to the third sub-switch of the second double-control switch S7; the first relay normally closed switch K1 is also electrically connected to the fourth sub-switch of the second double-control switch S7; wherein, the first normally open switch Q1 and the first relay coil KM1 form a first connection point B2; the second relay normally closed switch K2 and the first sub-switch of the first double-control switch S1 form a second connection point C3; the first normally closed switch S2 and the second normally closed switch F1 form a third connection point C4; the first button 1TA and the first normally closed switch S2 form a fourth connection point D8; the first connection point B2 serves as a second type of reference point B; the second connection point C3 and the third connection point C4 serve as a third type of reference point C; the fourth connection point D8 serves as a fourth type of reference point D.

[0037] The specific adjustment process of the controller is as follows:

[0038] The first step is to introduce expert analysis to analyze the design logic of the high-voltage disconnector's electrical circuit. From the disconnector's electrical circuit diagram, the circuit operates on a conditional logic. Each component in the diagram corresponds to a necessary and sufficient condition in the operational logic. Because there are many conditions in the circuit, expert analysis is introduced during troubleshooting. Each troubleshooting step categorizes all cases into "possible" and "impossible," then discards all "impossible" cases, effectively improving troubleshooting efficiency. (Appendix) Figure 1 This involves dividing the electrical circuit of the disconnector switch into several parts based on expert analysis, and determining the benchmark point for each expert analysis according to the alphabetical order of A, B, C, and D.

[0039] The second step is to use a tree diagram to organize the fault diagnosis logic of the disconnector switch electrical circuit. Based on the expert analysis method for the disconnector switch electrical circuit, a tree diagram is used to organize the fault diagnosis logic of the disconnector switch electrical circuit. By detecting and judging the benchmark points of the expert analysis method, the fault location (failed electrical components) is gradually identified. The whole process is logically clear, with sufficient conditions and accurate conclusions. The use of a key logic diagram for fault finding achieves clear conditions, accurate judgment, and rapid location.

[0040] The third step utilizes the fact that the electrical circuit of the disconnecting switch belongs to the traditional relay circuit. Compared with the microcomputer programmable controller, it can achieve the same logic control and the working mode is also the same. Therefore, the key logic diagram for troubleshooting disconnecting switches is programmed, and electrical drawings of various high-voltage disconnecting switches are stored in the built-in storage. Human-machine interaction is realized through the display of HMI LCD screen. The product's structural electrical design is designed according to engineering practicality design, so as to guide professional technicians to quickly troubleshoot electrical faults in disconnecting switches and find the failed equipment and electrical components.

[0041] The following is a specific example. Figure 5This is a closing fault tree diagram provided in an embodiment of the present invention. Optionally, the fault phenomenon is a closing fault; the controller 11 is used to measure the resistance between the two ends of the second relay coil KM2 within a first threshold range and issue a first resistance detection command to obtain the ground resistance of the first connection point B2; the display device 12 is used to display the first resistance detection command and provide a high resistance control and a low resistance control; the controller 11 is also used to issue a second resistance detection command to obtain the ground resistance of the first contact point connected to the second normally closed switch F1 and the first normally open switch Q1 when the high resistance control is selected; the controller 11 is also used to issue a third resistance detection command to obtain the ground resistance of the second contact point connected to the second normally closed switch K2 and the fourth button S4 when the low resistance control is selected, for the first relay coil KM1 and the first normally open switch Q1. The first sub-switch of the double-pole switch S1 is connected to the third contact of the third resistance; the display device 12 is used to display the second resistance detection command or the third resistance detection command, and provides a high resistance control and a low resistance control; the controller 11 is also used to issue a fourth resistance detection command to obtain the resistance to ground of the fourth contact of the first button 1TA connected to the first normally closed switch S2 when the high resistance control of the second resistance detection command is selected; the controller 11 is also used to issue a fifth resistance detection command to obtain the resistance to ground of the third connection point C4 when the low resistance control of the second resistance detection command is selected; the controller 11 is also used to issue a sixth resistance detection command to obtain the resistance to ground of the second connection point C3 when the high resistance control of the third resistance detection command is selected. The controller 11 is also used to issue a seventh resistance detection command when the low resistance control of the third resistance detection command is selected, to obtain the seventh resistance between the second contact and the end of the fourth button S4 away from the second contact; the display device 12 is used to display the fourth resistance detection command, the fifth resistance detection command, the sixth resistance detection command, or the seventh resistance detection command, and to provide high resistance control and low resistance control; the controller 11 is also used to determine that the neutral wire of the high-voltage disconnecting switch circuit is loosely connected when the high resistance control of the fourth resistance detection command is selected; the controller 11 is also used to determine that the first normally closed switch S2 is faulty when the low resistance control of the fourth resistance detection command is selected; the controller 11 is also used to determine that the fifth resistance detection command is loosely connected when the high resistance control of the fourth resistance detection command is selected, to obtain the seventh resistance between the second contact and the end of the fourth button S4 away from the second contact; the display device 12 is used to display the fourth resistance detection command, the fifth resistance detection command, the fifth resistance detection command, the sixth resistance detection command, the seventh ... When the high-resistance control of the resistance test command is selected, the second normally closed switch F1 is determined to be faulty; the controller 11 is also used to determine the first normally open switch Q1 is faulty when the low-resistance control of the fifth resistance test command is selected; the controller 11 is also used to determine the first sub-switch of the first double-control switch S1 is faulty when the high-resistance control of the sixth resistance test command is selected; the controller 11 is also used to determine the second normally closed relay switch K2 is faulty when the low-resistance control of the sixth resistance test command is selected; the controller 11 is also used to determine the fourth button S4 is faulty when the high-resistance control of the seventh resistance test command is selected; the controller 11 is also used to determine the third sub-switch of the second double-control switch S7 is faulty when the low-resistance control of the seventh resistance test command is selected.

[0042] Figure 6The fault tree diagram provided in this embodiment of the invention includes, optionally, a fault phenomenon of tripping. The controller 11 is used to measure the resistance across the second relay coil KM2 within a first threshold range and issue a first resistance detection command to obtain the ground resistance of the first connection point B2. The display device 12 is used to display the first resistance detection command and provide high-resistance and low-resistance controls. The controller 11 is also used to issue a second resistance detection command when the high-resistance control is selected to obtain the ground resistance of the first contact connecting the second normally closed switch F1 and the first normally open switch Q1. The controller 11 is also used to issue a third resistance detection command when the low-resistance control is selected to obtain the fifth contact connecting the first relay normally closed switch K1 and the fifth button S5, for the second relay. The fourth resistance of the sixth contact connected to the second sub-switch of the first double-control switch S1 is determined by the coil KM2. The display device 12 is used to display the second resistance detection command or the third resistance detection command, and provides high resistance and low resistance controls. The controller 11 is also used to issue a fourth resistance detection command to obtain the resistance to ground of the fourth contact of the first button 1TA connected to the first normally closed switch S2 when the high resistance control of the second resistance detection command is selected. The controller 11 is also used to issue a fifth resistance detection command to obtain the resistance to ground of the third connection point C4 when the low resistance control of the second resistance detection command is selected. The controller 11 is also used to issue a sixth resistance detection command to obtain the resistance to ground of the first relay normally closed switch K1 when the high resistance control of the third resistance detection command is selected. The controller 11 is also used to issue a seventh resistance detection command to obtain an eighth resistance between the sixth contact and the sixth contact when the low resistance control of the third resistance detection command is selected; the controller 11 is also used to display the fourth resistance detection command, the fifth resistance detection command, the sixth resistance detection command, or the seventh resistance detection command, and to provide high resistance control and low resistance control; the controller 11 is also used to determine that the neutral wire of the high voltage isolating switch circuit is loose when the high resistance control of the fourth resistance detection command is selected; the controller 11 is also used to determine that the first normally closed switch S2 is faulty when the low resistance control of the fourth resistance detection command is selected; control The controller 11 is also used to determine that the second normally closed switch F1 is faulty when the high-resistance control of the fifth resistance detection command is selected; the controller 11 is also used to determine that the first normally open switch Q1 is faulty when the low-resistance control of the fifth resistance detection command is selected; the controller 11 is also used to determine that the first sub-switch of the first double-control switch S1 is faulty when the high-resistance control of the sixth resistance detection command is selected; the controller 11 is also used to determine that the first normally closed relay switch K1 is faulty when the low-resistance control of the sixth resistance detection command is selected; the controller 11 is also used to determine that the fifth button S5 is faulty when the high-resistance control of the seventh resistance detection command is selected; the controller 11 is also used to determine that the fourth sub-switch of the second double-control switch S7 is faulty when the low-resistance control of the seventh resistance detection command is selected.

[0043] Optionally, the high-voltage disconnector circuit further includes: a control module; the first output terminal of the control module is electrically connected to the third sub-switch of the second double-control switch S7 and the fourth sub-switch of the second double-control switch S7 respectively; the first output point serves as a first type of reference point A; the fault phenomenon also includes control fault; the controller 11 is also used to issue a control resistance detection command to obtain the voltage to ground of the first output point; the display device 12 is used to display the resistance detection command and provide a high resistance control and a low resistance control; the controller 11 is also used to determine a high-voltage disconnector circuit fault when the low resistance control of the control resistance detection command is selected; the controller 11 is also used to determine a control module fault when the high resistance control of the control resistance detection command is selected.

[0044] Based on the same concept, embodiments of the present invention also provide a method for testing high-voltage disconnect switches. Figure 7 This is a flowchart illustrating a high-voltage disconnector testing method provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the method in this embodiment includes the following steps:

[0045] Step S101: The display device receives the fault phenomenon input by the user and transmits it to the controller; the fault phenomenon includes at least closing fault and opening fault.

[0046] Step S102: The controller obtains the reference points arranged in the first order based on the high-voltage disconnect switch circuit.

[0047] Step S103: The controller acquires multiple first reference points associated with the fault phenomenon and issues detection commands to the first reference points in sequence according to the first order.

[0048] Step S104: The display device displays the detection command and receives the detection result corresponding to the detection command input by the user.

[0049] Step S105: The controller obtains the fault location of the high-voltage disconnect switch circuit based on the detection results of multiple first reference points.

[0050] In this embodiment of the invention, the high-voltage disconnector test device includes a controller and a display device. The display device is electrically connected to the controller and is used to receive fault phenomena input by the user and transmit them to the controller. The fault phenomena include at least closing faults and opening faults. The controller stores reference points arranged in a first order based on the high-voltage disconnector circuit. The controller is used to acquire multiple first reference points associated with the fault phenomena and issue detection commands to the first reference points sequentially according to the first order. The display device is also used to display the detection commands and receive the detection results corresponding to the detection commands input by the user. The controller is used to obtain the fault location of the high-voltage disconnector circuit based on the detection results of multiple first reference points. This embodiment effectively improves the detection efficiency of faults in the electrical circuits of high-voltage disconnectors.

[0051] Based on the above embodiments, the controller is specifically used to issue a resistance detection command centered on a first reference point; the display device is specifically used to receive the detection result corresponding to the resistance detection command input by the user; the detection result includes a high resistance result and a low resistance result; the resistance measurement value of the high resistance result is greater than the resistance measurement value of the low resistance result; the controller is used to narrow down the range of the fault location based on the detection result. The high-voltage disconnector test method in this embodiment is applicable to the high-voltage disconnector test provided in the embodiments of the present invention, possesses the corresponding technical features, and also possesses the beneficial effects of the corresponding technical features, which will not be elaborated further here.

[0052] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A high voltage disconnector testing device, characterized in that, The application relates to a controller and a display device. The display device is electrically connected with the controller, and is used for receiving a user-input fault phenomenon and transmitting the fault phenomenon to the controller. The fault phenomenon includes closing fault and opening fault. The controller stores reference points arranged in a first order and obtained according to a high-voltage disconnecting circuit; the controller is used for obtaining a plurality of first reference points associated with the fault phenomenon, and sequentially issuing detection instructions to the first reference points according to the first order; the reference points include first-type reference points, second-type reference points, third-type reference points and fourth-type reference points arranged in the first order; the first reference points include at least one type of the first-type reference points, the second-type reference points, the third-type reference points and the fourth-type reference points; each type of reference points includes at least one reference point. The display device is further used for displaying the detection instructions and receiving detection results corresponding to the detection instructions input by a user. The controller is used for obtaining a fault position of the high-voltage disconnecting circuit according to the detection results of the plurality of first reference points. The application further relates to a voice broadcast device.

2. The high-voltage disconnector testing device according to claim 1, characterized in that The voice broadcast device is electrically connected with the controller, and is used for voice broadcasting the detection instructions and the fault position. The controller is specifically used for issuing resistance detection instructions with the first reference points as the center. The display device is specifically used for receiving detection results corresponding to the resistance detection instructions input by a user; the detection results include high-resistance results and low-resistance results; a resistance measurement value of the high-resistance results is greater than a resistance measurement value of the low-resistance results.

3. The high voltage disconnector testing device according to claim 1, characterized in that, The controller is used for narrowing a range of the fault position according to the detection results. The high-voltage disconnecting circuit includes a first branch, a closing branch and an opening branch. The first branch includes a first button, a first normally closed switch, a second normally closed switch and a first normally open switch which are sequentially electrically connected.

4. The high voltage disconnector testing device according to claim 1, characterized in that, The closing branch includes a first relay coil, a first sub-switch of a first double-control switch, a second relay normally closed switch and a fourth button which are sequentially electrically connected. The opening branch includes a second relay coil, a second sub-switch of the first double-control switch, a first relay normally closed switch and a fifth button which are sequentially electrically connected. The first normally open switch of the first branch is electrically connected with the first relay coil of the closing branch; the first normally open switch of the first branch is electrically connected with the second relay coil of the opening branch; the second relay normally closed switch is further electrically connected with a third sub-switch of a second double-control switch; the first relay normally closed switch is further electrically connected with a fourth sub-switch of the second double-control switch. The first normally open switch and the first relay coil form a first connection point; the second relay normally closed switch and the first sub-switch of the first double-control switch form a second connection point; the first normally closed switch and the second normally closed switch form a third connection point; the first button and the first normally closed switch form a fourth connection point. The first connection point is a second-type reference point; the second connection point and the third connection point are third-type reference points; and the fourth connection point is a fourth-type reference point. The fault phenomenon is closing fault. ​ 5. The high-voltage disconnector testing device according to claim 4, characterized in that ​ The controller is configured to measure resistance between the second relay coil and the first threshold range, and send a first resistance detection instruction to obtain resistance of the first connection point to ground; The display device is configured to display the first resistance detection instruction and provide a high resistance control and a low resistance control; The controller is further configured to send a second resistance detection instruction to obtain resistance of a first contact point connected by the second normally closed switch and the first normally open switch when the high resistance control is selected, and send a third resistance detection instruction to obtain resistance of a third contact point connected by the first relay coil and a first sub-switch of the first double control switch when the low resistance control is selected; The display device is configured to display the second resistance detection instruction or the third resistance detection instruction and provide a high resistance control and a low resistance control; The controller is further configured to send a fourth resistance detection instruction to obtain resistance of a fourth contact point connected by the first button and the first normally closed switch when the high resistance control of the second resistance detection instruction is selected, and send a fifth resistance detection instruction to obtain resistance of the third connection point to ground when the low resistance control of the second resistance detection instruction is selected, send a sixth resistance detection instruction to obtain a sixth resistance between the second connection point and the third contact point when the high resistance control of the third resistance detection instruction is selected, and send a seventh resistance detection instruction to obtain a seventh resistance between the second contact point and an end of the fourth button away from the second contact point when the low resistance control of the third resistance detection instruction is selected; The display device is configured to display the fourth resistance detection instruction, the fifth resistance detection instruction, the sixth resistance detection instruction or the seventh resistance detection instruction and provide a high resistance control and a low resistance control; The controller is further configured to determine that the high-voltage isolation switch loop zero line is virtually connected when the high resistance control of the fourth resistance detection instruction is selected, determine that the first normally closed switch is faulty when the low resistance control of the fourth resistance detection instruction is selected, determine that the second normally closed switch is faulty when the high resistance control of the fifth resistance detection instruction is selected, determine that the first normally open switch is faulty when the low resistance control of the fifth resistance detection instruction is selected, determine that the first sub-switch of the first double control switch is faulty when the high resistance control of the sixth resistance detection instruction is selected, determine that the second relay normally closed switch is faulty when the low resistance control of the sixth resistance detection instruction is selected, determine that the fourth button is faulty when the high resistance control of the seventh resistance detection instruction is selected, and determine that the third sub-switch of the second double control switch is faulty when the low resistance control of the seventh resistance detection instruction is selected.

6. The high voltage disconnector testing device according to claim 4, characterized in that The fault phenomenon is a breaking fault. The controller is used to measure the resistance at both ends of the second relay coil within a first threshold range and issue a first resistance detection command to obtain the resistance to ground of the first connection point; The display device is used to display the first resistance detection command and provide high resistance control and low resistance control; The controller is further configured to issue a second resistance detection command to obtain the ground resistance of the first contact point connected to the second normally closed switch and the first normally open switch when the high resistance control is selected; the controller is further configured to issue a third resistance detection command to obtain the fourth resistance of the fifth contact point connected to the first normally closed switch and the fifth button, and the fourth resistance of the sixth contact point connected to the second sub-switch of the second relay coil and the first double-control switch when the low resistance control is selected. The display device is used to display the second resistance detection command or the third resistance detection command, and provides a high resistance control and a low resistance control; The controller is further configured to issue a fourth resistance detection command to obtain the resistance to ground of the fourth contact of the first button connected to the first normally closed switch when the high-resistance control of the second resistance detection command is selected; the controller is further configured to issue a fifth resistance detection command to obtain the resistance to ground of the third connection point when the low-resistance control of the second resistance detection command is selected; the controller is further configured to issue a sixth resistance detection command to obtain the fifth resistance between the seventh contact of the first relay normally closed switch connected to the second sub-switch of the first double-control switch and the sixth contact when the high-resistance control of the third resistance detection command is selected; the controller is further configured to issue a seventh resistance detection command to obtain the eighth resistance between the sixth contact and the end of the fifth button away from the sixth contact when the low-resistance control of the third resistance detection command is selected; The display device is used to display the fourth resistance detection command, the fifth resistance detection command, the sixth resistance detection command, or the seventh resistance detection command, and provides high resistance control and low resistance control; The controller is further configured to determine that the neutral wire of the high-voltage disconnecting switch circuit is loosely connected when the high-resistance control of the fourth resistance detection command is selected; the controller is further configured to determine that the first normally closed switch is faulty when the low-resistance control of the fourth resistance detection command is selected; the controller is further configured to determine that the second normally closed switch is faulty when the high-resistance control of the fifth resistance detection command is selected; the controller is further configured to determine that the first normally open switch is faulty when the low-resistance control of the fifth resistance detection command is selected; the controller is further configured to determine that the first sub-switch of the first double-control switch is faulty when the high-resistance control of the sixth resistance detection command is selected; the controller is further configured to determine that the first normally closed relay switch is faulty when the low-resistance control of the sixth resistance detection command is selected; the controller is further configured to determine that the fifth button is faulty when the high-resistance control of the seventh resistance detection command is selected; and the controller is further configured to determine that the fourth sub-switch of the second double-control switch is faulty when the low-resistance control of the seventh resistance detection command is selected.

7. The high voltage disconnector testing device according to claim 4, characterized in that, The high-voltage disconnector circuit also includes: a control module; The first output terminal of the control module is electrically connected to the third sub-switch and the fourth sub-switch of the second double-control switch, respectively; the first output terminal serves as a first type of reference point. The fault phenomena also include control faults; The controller is also configured to issue a control resistance detection command to obtain the voltage to ground at the first output terminal; the display device is configured to display the resistance detection command and provide a high resistance control and a low resistance control; the controller is also configured to determine that the high voltage disconnect switch circuit is faulty when the low resistance control of the control resistance detection command is selected; the controller is also configured to determine that the control module is faulty when the high resistance control of the control resistance detection command is selected.

8. A high voltage disconnector testing method, characterized by, The high-voltage disconnector test apparatus according to any one of claims 1-7 comprises: The display device receives user input of fault symptoms and transmits them to the controller; the fault symptoms include closing faults and opening faults; The controller acquires the reference points arranged in the first order based on the high-voltage disconnector circuit; The controller acquires multiple first reference points associated with the fault phenomenon and issues detection commands to the first reference points in sequence according to the first order; the reference points include a first type of reference point, a second type of reference point, a third type of reference point, and a fourth type of reference point arranged in the first order; the first reference point includes at least one of the first type of reference point, the second type of reference point, the third type of reference point, and the fourth type of reference point; each type of reference point includes at least one reference point; The display device displays the detection command and receives the detection result corresponding to the detection command input by the user; The controller obtains the fault location of the high-voltage disconnect switch circuit based on the detection results of the multiple first reference points.

9. The high-voltage disconnector testing method according to claim 8, characterized in that, The controller is specifically used to issue a resistance detection command centered on the first reference point; The display device is specifically used to receive the detection result corresponding to the resistance detection command input by the user; the detection result includes a high resistance result and a low resistance result; the resistance measurement value of the high resistance result is greater than the resistance measurement value of the low resistance result; The controller is used to narrow down the location of the fault based on the detection results.

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