Power distribution network reality test platform single-phase earth fault mode switching method and system

Abstract

The invention discloses a power distribution network reality test platform single-phase earth fault mode switching method and system. The method comprises the steps of obtaining a first simulation fault mode set of a target test platform; the first simulation fault mode set comprises a plurality of different fault modes; establishing a first fault switching strategy for different phases based on the first simulation fault mode set; and obtaining a to-be-simulated fault mode, and switching the fault mode based on the first fault switching strategy. A digital control mode is adopted, the main control work station is used for issuing a control command through an optical fiber to achieve ground fault mode switching, the safety measure links of power failure, electricity testing and ground wire installation are omitted, the ground fault mode switching time is greatly shortened, and the test safety is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution testing, and in particular to a single-phase ground fault mode switching method and system for a power distribution network reality test platform. Background Art

[0002] The neutral point of a 10kV line usually adopts a small current grounding method, and most 10kV line faults are single-phase grounding faults. The fault modes include grounding by metal, asphalt road, mud / grass, cable damage, insulator damage, etc. Therefore, the neutral point small current grounding system places high demands on the line selection equipment when a single-phase grounding fault occurs.

[0003] The single-phase grounding test of the neutral point small current grounding system generally adopts simulation method, but it is difficult for the simulation system to restore the grounding methods such as asphalt road, mud / grass, cable damage, and insulator damage. For this reason, power companies have proposed a distribution network reality test method to conduct single-phase grounding test of the neutral point small current grounding system.

[0004] However, when conducting a single-phase grounding test of a neutral point low current grounding system, it is necessary to switch the grounding fault mode. Currently, when switching the grounding fault mode, it is necessary to perform safety measures such as power outage, power testing, and installation of grounding wires, which results in low test efficiency. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above existing problems, the present invention is proposed.

[0007] Therefore, the present invention provides a method and system for switching single-phase grounding fault modes in a real-life test platform of a distribution network, which can solve the problems mentioned in the background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] In a first aspect, the present invention provides a method for switching a single-phase ground fault mode in a distribution network reality test platform, comprising:

[0010] Obtaining a first simulated fault mode set of a target test platform;

[0011] The first simulated fault mode set includes several different fault modes;

[0012] Establishing first fault switching strategies for different phases based on the first simulated fault mode set;

[0013] Obtain a failure mode to be simulated, and perform failure mode switching based on the first failure switching strategy.

[0014] As a preferred solution of the single-phase ground fault mode switching method of the distribution network reality test platform of the present invention, wherein: the establishment of fault switching strategies for different phases based on the first simulated fault mode set includes:

[0015] The fault switching strategy includes a first switching strategy for phase A, a second switching strategy for phase B, and a third switching strategy for phase C;

[0016] The fault switching strategy is a preset control strategy for controlling phase A, phase B or phase C to be connected to any preset grounding point.

[0017] As a preferred solution of the single-phase grounding fault mode switching method of the distribution network reality test platform of the present invention, the preset grounding point includes:

[0018] A plurality of different types of grounding points established for a first set of simulated fault modes;

[0019] The number of preset grounding points is not less than the number of concentrated fault modes in the first simulated fault mode.

[0020] As a preferred solution of the single-phase grounding fault mode switching method of the distribution network reality test platform of the present invention, wherein: the obtaining of the fault mode to be simulated and the switching of the fault mode based on the first fault switching strategy include:

[0021] Obtaining a fault mode to be simulated, wherein the fault mode to be simulated is a single-phase simulated fault mode, that is, any one phase-by-phase simulated fault mode among the three phases A, B, and C;

[0022] The first fault switching strategy performs fault mode switching according to the corresponding single-phase simulated fault mode.

[0023] As a preferred solution of the single-phase grounding fault mode switching method of the distribution network reality test platform of the present invention, the first fault switching strategy also includes:

[0024] The first switching strategy, the second switching strategy and the third switching strategy all include any strategy of receiving a first instruction and a second instruction and performing a switching operation according to the first instruction and the second instruction.

[0025] As a preferred solution of the single-phase ground fault mode switching method of the distribution network reality test platform of the present invention, the first instruction and the second instruction include:

[0026] The first instruction is an instruction for controlling the phase;

[0027] The second instruction is an instruction to connect to any preset grounding point.

[0028] As a preferred solution of the single-phase grounding fault mode switching method of the distribution network reality test platform of the present invention, the preset grounding points at least include grounding points via grass, grounding points via mud, grounding points via asphalt roads, metallic grounding points, grounding points via damaged cables, and grounding points via damaged insulators.

[0029] In a second aspect, the present invention provides a single-phase ground fault mode switching system for a distribution network reality test platform, comprising:

[0030] A data set acquisition module, used to acquire a first simulated fault mode set of a target test platform;

[0031] The first simulated fault mode set includes several different fault modes;

[0032] A strategy establishment module, used to establish first fault switching strategies for different phases based on the first simulated fault mode set;

[0033] The switching module is used to obtain the fault mode to be simulated and perform fault mode switching based on the first fault switching strategy.

[0034] In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0035] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0036] Compared with the prior art, the present invention has the following beneficial effects: the present invention proposes a method and system for switching single-phase ground fault mode of a distribution network reality test platform, obtains a first simulated fault mode set of a target test platform; the first simulated fault mode set includes several different fault modes; establishes a first fault switching strategy for different phases based on the first simulated fault mode set; obtains the fault mode to be simulated, and switches the fault mode based on the first fault switching strategy. The digital control method is adopted, and the control command is sent by the main control workstation through the optical fiber to achieve the ground fault mode switching, which saves the power outage, power testing, and installation of ground wire safety measures, and greatly saves the ground fault mode switching time and the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0038] Figure 1 A method flow chart of a single-phase ground fault mode switching method and system for a distribution network reality test platform provided by an embodiment of the present invention;

[0039] Figure 2 A schematic circuit diagram of a single-phase ground fault mode switching method and system for a distribution network reality test platform provided by an embodiment of the present invention;

[0040] Figure 3 An internal structural diagram of a computer device of a single-phase grounding fault mode switching method and system for a distribution network reality test platform provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0042] Example 1

[0043] Reference Figure 1-Figure 3 , which is the first embodiment of the present invention, and provides a single-phase grounding fault mode switching method and system for a distribution network reality test platform, including:

[0044] There are some technical defects and deficiencies in the existing related technologies. For example, when conducting actual distribution network tests, the ground fault mode switching process is cumbersome and time-consuming, and there are safety hazards.

[0045] The present application provides a method that can effectively solve the above-mentioned problems. Next, multiple embodiments will be combined to explain in detail how to implement the single-phase grounding fault mode switching method of the distribution network reality test platform;

[0046] Figure 1 A method flow chart of a single-phase ground fault mode switching method and system for a distribution network reality test platform is shown, including:

[0047] S101, obtaining a first simulated fault mode set of a target test platform;

[0048] In the embodiment of the present application, the first simulated fault mode set includes several different fault modes;

[0049] In an optional embodiment, different fault modes may be single-phase grounding fault modes or multi-phase grounding fault modes, such as any one phase or two phases of phase A, phase B, and phase C being grounded simultaneously, and three phases being grounded simultaneously.

[0050] In an optional embodiment, if the single-phase grounding fault mode is discussed, the different fault modes in the first simulated fault mode set may be metallic grounding, asphalt grounding, mud / grass grounding, cable damage grounding, insulator damage grounding, etc. These fault modes can simulate various single-phase grounding fault conditions that may occur in the real world.

[0051] In an optional embodiment, if a multi-phase grounding fault mode is discussed, the different fault modes in the first simulated fault mode set may be a simultaneous grounding fault mode of two phases AB, a simultaneous grounding fault mode of two phases AC, a simultaneous grounding fault mode of two phases BC, and a simultaneous grounding fault mode of three phases ABC, etc. These fault modes can simulate various multi-phase grounding fault situations that may occur in the real world.

[0052] In the embodiments of the present application, a single-phase grounding fault mode is discussed. For a multi-phase grounding fault mode, relevant technicians can slightly improve the design of the present application according to actual needs, but such design should be within the protection scope of the present application.

[0053] In an optional embodiment, taking into account the operability of the target experimental platform, as many different fault modes as possible can be simulated, and a target distribution network reality experimental platform can be established in a variety of ways, for example, by simulating the fault mode through simulation software, or by simulating the fault mode through actual physical equipment, or by combining simulation software and physical equipment to achieve a simulation effect that is closer to the actual situation.

[0054] In the embodiment of the present application, a distribution network reality experiment platform is established, and reliable fault simulation is achieved by designing the hardware structure of the corresponding method to ensure the accuracy and reliability of the experiment.

[0055] For example, it is possible to establish Figure 2 The schematic circuit diagram shown in the figure is a hardware device configured based on the method of the present application. Figure 2 As shown, six different fault modes are established, so in the present application, the first simulated fault mode set includes several simulated fault modes that can be simulated: grounding point via grass, grounding point via mud, grounding point via asphalt road, metallic grounding point, grounding point via damaged cable, and grounding point via damaged insulator;

[0056] In an alternative embodiment, using Figure 2 The schematic circuit diagram shown can simulate six different faults. Relevant technicians can increase or decrease the fault modes according to actual needs. For example, when more grounding methods need to be considered, more types of grounding points can be added, such as underwater grounding points, concrete grounding points, etc., to meet different test requirements.

[0057] It should be noted that the distribution network reality test platform established in the above manner can simulate a variety of possible actual fault conditions, providing strong experimental support for fault diagnosis and processing of the distribution network. S102, establishing a first fault switching strategy for different phases based on a first simulated fault mode set;

[0058] In the embodiment of the present application, establishing a fault switching strategy for different phases based on the first simulated fault mode set includes:

[0059] The fault switching strategy includes a first switching strategy for phase A, a second switching strategy for phase B, and a third switching strategy for phase C;

[0060] The fault switching strategy is a preset control strategy for controlling phase A, phase B or phase C to be connected to any preset grounding point.

[0061] In an optional embodiment, the first switching strategy may be a strategy designed in different ways, the purpose of which is to control the connection of phase A, phase B, or phase C to any preset grounding point. For example, a hardware simulation device model for the control logic may be established using a preset control logic combined with simulation software;

[0062] In an optional embodiment, the control logic can also be implemented by actual physical devices, or a more precise control effect can be achieved by combining simulation software and physical devices. For example, when it is necessary to simulate a ground fault of phase A, the first switching strategy can be designed to achieve the connection of phase A with a preset ground point by controlling the closing of a relay. Similarly, fault simulation for phases B and C can also be achieved through corresponding control strategies.

[0063] In an optional embodiment, the control logic can also be implemented in other ways, for example, a programmable logic controller (PLC) can be used to achieve precise control of the fault simulation. By programming the PLC, a specific fault simulation sequence can be set to simulate various complex fault conditions in the test.

[0064] In the embodiment of the present application, the design is as follows Figure 2The specific simulation principle circuit diagram shown in the figure, the detailed connection relationship of the fault simulation area is the designed control logic, the main control room includes the main control workstation and the optical fiber switch; the fault simulation area includes the single-phase grounding fault switch, the adjustable power resistor, the single-phase grounding fault mode switching device, the grounding point through the grass, the grounding point through the mud, the grounding point through the asphalt road, the metallic grounding point, the grounding point through the damaged cable, the grounding point through the damaged insulator, the high-voltage capacitor C1, and the high-voltage capacitor C2; the main control workstation is connected to the controller A and the controller B through the optical fiber switch; the single-phase grounding fault switch includes the A-phase 10kV contactor, the B-phase 10kV contactor, the C-phase 10kV contactor, and the controller A. The controller A controls the A-phase 10kV contactor, the B-phase 10kV contactor, and the C-phase 10kV contactor to open and close through the cable; the single The phase-to-ground fault mode switching device comprises switch 1, switch 2, switch 3, switch 4, switch 5, switch 6 and controller B. Controller B controls switch 1, switch 2, switch 3, switch 4, switch 5 and switch 6 through cables. When controller A controls the A-phase 10kV contactor, the B-phase 10kV contactor and the C-phase 10kV contactor to close, if the A-phase 10kV contactor is closed, the B-phase 10kV contactor and the C-phase 10kV contactor are locked and closed; if the B-phase 10kV contactor is closed, the A-phase 10kV contactor and the C-phase 10kV contactor are locked and closed; if the C-phase 10kV contactor is closed, the A-phase 10kV contactor and the B-phase 10kV contactor are locked and closed; high-voltage capacitor C1 and high-voltage capacitor C2 are connected in series and connected to the high-voltage circuit, and the series connection point M is connected to the voltage detection module of controller B.

[0065] In an optional embodiment, the control output is locked when the voltage value detected by the voltage detection module of controller B is greater than 30% of the rated voltage value UN;

[0066] In an optional embodiment, the rated voltage value UN is AC6000V.

[0067] In the embodiment of the present application, the preset grounding point includes:

[0068] A plurality of different types of grounding points established for a first set of simulated fault modes;

[0069] The number of preset grounding points is not less than the number of concentrated fault modes in the first simulated fault mode.

[0070] In an optional embodiment, the number of preset grounding points is not less than the number of fault modes in the first simulated fault mode set to ensure that each fault mode can be accurately simulated. For example, if the first simulated fault mode set includes six different fault modes, at least six preset grounding points are required to correspond to these fault modes.

[0071] In an optional embodiment, the preset grounding point can be an actual physical grounding point or a grounding point simulated in simulation software. The physical grounding point can be an actual grounding device, such as a grounding rod, a grounding grid, etc., while the grounding point in the simulation software can be a grounding resistance, a grounding capacitance, etc. simulated by the software.

[0072] In an embodiment of the present application, the preset grounding points include at least a grounding point via grass, a grounding point via mud, a grounding point via asphalt road, a metallic grounding point, a grounding point via a damaged cable, and a grounding point via a damaged insulator.

[0073] It should be noted that the output end of the damaged insulator is connected to the earth, and the damaged insulator can be replaced with a damaged lightning arrester.

[0074] It should be noted that the fault switching strategy established in the above manner can ensure that various single-phase grounding fault conditions can be simulated quickly and accurately when conducting actual distribution network tests, thereby improving the efficiency and accuracy of the test.

[0075] In the embodiment of the present application, the first failover strategy also includes:

[0076] The first switching strategy, the second switching strategy and the third switching strategy all include any strategy of receiving the first instruction and the second instruction and performing a switching operation according to the first instruction and the second instruction.

[0077] The first instruction and the second instruction include:

[0078] The first instruction is an instruction for controlling the phase;

[0079] The second instruction is an instruction to connect to any preset grounding point.

[0080] It should be noted that there are other instructions in the present application. For example, the main control workstation sends an instruction to controller A to adjust the adjustable power resistance to 0 ohms, and after the test is completed, it sends an instruction to control the opening of the 10kV contactor of a phase of the single-phase ground fault switch, etc. Such instructions are not restricted here because such instructions can be designed accordingly with the distribution of the first instruction and the second instruction.

[0081] In an optional embodiment, the first instruction and the second instruction can be issued by the master control workstation through optical fiber, ensuring the accuracy and rapid response of the control command. The master control workstation is connected to controller A and controller B through an optical fiber switch to achieve precise control of the fault simulation area. Controller A and controller B control the corresponding contactor and knife switch to perform opening and closing operations according to the received instructions, thereby achieving the switching of the fault mode.

[0082] In an optional embodiment, relevant technicians can design different control centers according to actual needs to implement the distribution of instructions. For example, a central control center can be designed to receive instructions from the main control workstation and distribute these instructions to each controller. This design can improve the scalability and flexibility of the system, so that the system can adapt to a larger-scale distribution network reality test platform.

[0083] In an optional embodiment, the establishment of the fault switching strategy can also take into account the real-time and accuracy of the fault simulation. In order to achieve this goal, the fault switching strategy also includes a feedback mechanism for the fault simulation. For example, after the controller A and the controller B perform the fault switching operation, they will feed back the operation results to the main control workstation. The main control workstation determines whether the fault simulation is successful based on the feedback information, and adjusts the subsequent fault simulation strategy accordingly.

[0084] In an optional embodiment, the establishment of the failover strategy can also consider the safety of the fault simulation. In order to ensure the safety of operators and equipment, the failover strategy includes safety protection measures. For example, before performing a fault simulation, the system will perform a series of safety checks, including but not limited to checking whether all equipment is in normal working condition, confirming whether all operators have evacuated to a safe area, etc. Only after confirming that all safety conditions are met, the system will perform the failover operation.

[0085] In an optional embodiment, the establishment of the fault switching strategy can also take into account the repeatability of the fault simulation. In order to ensure that the results of each fault simulation are comparable, the fault switching strategy includes detailed simulation parameter records. For example, each time a fault is simulated, the system will record information such as the simulated fault type, simulated fault parameters, and simulation time. This information will be stored in the system for subsequent analysis and research.

[0086] It should be noted that the specific design can be increased or decreased according to the actual design requirements of relevant technical personnel, but the underlying control logic is to increase or decrease the related operations of fault simulation by controlling the sending and receiving instructions, which should be within the scope of protection of this application;

[0087] In the embodiments of the present application, Figure 2 As shown, the master control workstation is connected to controller A and controller B through a fiber optic switch;

[0088] In an embodiment of the present application, a single-phase ground fault switch includes a phase A 10kV contactor, a phase B 10kV contactor, a phase C 10kV contactor, and a controller A. The input end of the phase A 10kV contactor is connected to the 10kV ground fault point A, the input end of the phase B 10kV contactor is connected to the 10kV ground fault point B, the input end of the phase B 10kV contactor is connected to the 10kV ground fault point B, and the output end of the phase A 10kV contactor is connected to the output end of the phase B 10kV contactor and the output end of the phase C 10kV contactor, and then connected to the input end of the adjustable power resistor.

[0089] In the embodiment of the present application, the output end of the adjustable power resistor is respectively connected to the input end of the high-voltage capacitor C1 and the input end of the single-phase grounding fault mode switching device.

[0090] In the embodiment of the present application, the output end of the high-voltage capacitor C1 is connected to the input end of the high-voltage capacitor C2, and the output end of the high-voltage capacitor C2 is connected to the ground. The connection point M of the high-voltage capacitor C1 and the high-voltage capacitor C2 is connected to the voltage detection module of the controller B. The single-phase grounding fault mode switching device includes a knife switch 1, a knife switch 2, a knife switch 3, a knife switch 4, a knife switch 5, a knife switch 6, and a controller B. The input end of the knife switch 1 is respectively connected to the input end of the knife switch 2, the input end of the knife switch 3, the input end of the knife switch 4, the input end of the knife switch 5, and the input end of the knife switch 6. The output end of the knife switch 1 is connected to the grass, the output end of the knife switch 2 is connected to the mud, the output end of the knife switch 3 is connected to the asphalt road, the output end of the knife switch 4 is connected to the ground, the output end of the knife switch 5 is connected to the damaged cable A, and the output end of the knife switch 6 is connected to the damaged insulator.

[0091] In the embodiment of the present application, controller A can receive the control instruction of the main control workstation, i.e., the first instruction, to control the opening and closing of the 10kV contactor of phase A, the 10kV contactor of phase B, and the 10kV contactor of phase C. Controller B can receive the control instruction of the main control workstation, i.e., the second instruction, and calculate the primary circuit voltage through the voltage detection module. When the primary circuit voltage value is less than 30% of the rated voltage value, a control signal is sent to control the closing or opening of knife switch 1, knife switch 2, knife switch 3, knife switch 4, knife switch 5, and knife switch 6.

[0092] In an optional embodiment, if relevant technical personnel increase or decrease the corresponding fault mode, they can directly add or reduce the corresponding fault mode in the present application. Figure 2 The number of knife switches is increased or decreased based on the number of knife switches. This application does not limit the number of knife switches.

[0093] In an optional embodiment, if relevant technicians use three single-phase ground fault mode switching devices for different phases to replace the single single-phase ground fault mode switching device in the present application, this method should also be within the protection scope of the present application.

[0094] It should be noted that establishing the first fault switching strategy for different phases based on the first simulated fault mode set can achieve rapid positioning and accurate processing of single-phase grounding faults in the distribution network. Through the designed fault switching strategy, various possible fault conditions can be simulated, so that in actual operation, when a single-phase grounding fault occurs, the operator can quickly identify the fault type and take corresponding treatment measures. In addition, through the diversified design of preset grounding points, grounding faults in different environments can be simulated, such as grass, mud, asphalt roads, etc., which helps to study the differences in the impact of different grounding conditions on faults, and then optimize the design and maintenance strategy of the distribution network.

[0095] S103: Obtain a fault mode to be simulated, and perform fault mode switching based on a first fault switching strategy.

[0096] In the embodiment of the present application, obtaining the fault mode to be simulated and switching the fault mode based on the first fault switching strategy includes:

[0097] Obtain a fault mode to be simulated, where the fault mode to be simulated is a single-phase simulated fault mode, that is, any phase-by-phase simulated fault mode among the three phases A, B, and C;

[0098] The first fault switching strategy performs fault mode switching for the corresponding single-phase simulated fault mode.

[0099] For example, assuming that a metallic fault on phase A is simulated, the main control workstation sends an instruction to controller A to adjust the adjustable power resistance to 0 ohms. After the adjustable power resistance is adjusted, the main control workstation sends an instruction to controller B to close switch 4. After switch 4 is closed, an instruction to close the 10kV contactor of phase A of the single-phase grounding fault switch is issued. After the test is completed, an instruction to open the 10kV contactor of phase A of the single-phase grounding fault switch is issued.

[0100] For example, assuming that a fault of phase B through a damaged cable is simulated, the master control workstation first sends an instruction to controller A to adjust the adjustable power resistor to a specific value to simulate the resistance characteristics of the damaged cable. Subsequently, the master control workstation sends an instruction to controller B to close the knife switch 5 to connect the damaged cable simulation point. After completing these steps, the master control workstation then sends an instruction to control the closing of the 10kV contactor of phase B of the single-phase grounding fault switch to simulate the grounding fault of phase B. After the fault simulation is completed, the master control workstation sends an instruction to control the opening of the 10kV contactor of phase B of the single-phase grounding fault switch to end the fault simulation.

[0101] In summary, the present invention proposes a method for switching single-phase grounding fault mode of a real-life test platform of a distribution network, obtaining a first simulated fault mode set of a target test platform; the first simulated fault mode set includes several different fault modes; establishing a first fault switching strategy for different phases based on the first simulated fault mode set; obtaining the fault mode to be simulated, and switching the fault mode based on the first fault switching strategy. By adopting a digital control method, the grounding fault mode can be switched by using a main control workstation to issue control commands through optical fibers, saving the steps of power outage, power testing, and installation of grounding wire safety measures, greatly saving the time for switching the grounding fault mode and the safety of the test.

[0102] Example 2

[0103] In a preferred embodiment, the test process before the present invention is implemented is:

[0104] (1) Figure 2 Assume that a metallic fault occurs on phase A. First, disconnect the upper switchgear connected to the single-phase grounding fault switch. Verify that there is no voltage on the incoming line side of the 10kV contactor of phase A, the 10kV contactor of phase B, and the 10kV contactor of phase C. Install a grounding wire on the incoming line side of the 10kV contactor of phase A, the 10kV contactor of phase B, and the 10kV contactor of phase C.

[0105] (2) Verify that there is no voltage at the input end of the adjustable power resistor and install a grounding wire at the input end of the adjustable power resistor.

[0106] (3) Adjust the resistance of the adjustable power resistor to 0 ohms, and connect the output end of the adjustable power resistor to a metallic grounding point.

[0107] (4) Remove the grounding wire installed on the incoming line side of the single-phase ground fault switch A phase 10kV contactor, B phase 10kV contactor, and C phase 10kV contactor, and remove the grounding wire installed on the input end of the adjustable power resistor.

[0108] (5) A command is issued to close the 10 kV contactor of phase A of the single-phase ground fault switch. After the test is completed, a command is issued to open the 10 kV contactor of phase A of the single-phase ground fault switch.

[0109] In a preferred embodiment, the test process after the implementation of the present invention is:

[0110] Assuming that a metallic fault on phase A occurs in the simulation, the main control workstation sends a command to controller A to adjust the adjustable power resistance to 0 ohms. After the adjustable power resistance is adjusted, the main control workstation sends a command to controller B to close switch 4. After switch 4 is closed, a command to close the 10kV contactor of phase A of the single-phase grounding fault switch is issued. After the test is completed, a command to open the 10kV contactor of phase A of the single-phase grounding fault switch is issued.

[0111] Example 3

[0112] This embodiment also provides a single-phase ground fault mode switching system for a distribution network reality test platform, including:

[0113] A data set acquisition module, used to acquire a first simulated fault mode set of a target test platform;

[0114] The first simulated failure mode set includes a number of different failure modes;

[0115] A strategy establishment module, used for establishing first fault switching strategies for different phases based on a first simulated fault mode set;

[0116] The switching module is used to obtain the fault mode to be simulated and perform fault mode switching based on the first fault switching strategy.

[0117] The above-mentioned unit modules may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to the above-mentioned modules.

[0118] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 3 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a single-phase grounding fault mode switching method of a distribution network reality test platform is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse.

[0119] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0120] Obtaining a first simulated fault mode set of a target test platform;

[0121] The first simulated failure mode set includes a number of different failure modes;

[0122] Establishing first fault switching strategies for different phases based on the first simulated fault mode set;

[0123] A fault mode to be simulated is obtained, and a fault mode switching is performed based on a first fault switching strategy.

[0124] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0125] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0126] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0127] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0128] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0129] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0130] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for switching single-phase ground fault mode in a distribution network real-world test platform, characterized in that: include: Obtaining a first simulated fault mode set of a target test platform; The first simulated fault mode set includes several different fault modes; Establishing first fault switching strategies for different phases based on the first simulated fault mode set; Obtain a failure mode to be simulated, and perform failure mode switching based on the first failure switching strategy.

2. The single-phase ground fault mode switching method of the distribution network real-life test platform according to claim 1, characterized in that: The establishing of the fault switching strategies for different phases based on the first simulated fault mode set includes: The fault switching strategy includes a first switching strategy for phase A, a second switching strategy for phase B, and a third switching strategy for phase C; The fault switching strategy is a preset control strategy for controlling phase A, phase B or phase C to be connected to any preset grounding point.

3. The single-phase ground fault mode switching method of the distribution network real-life test platform according to claim 2, characterized in that: The preset grounding point includes: A plurality of different types of grounding points established for a first set of simulated fault modes; The number of preset grounding points is not less than the number of concentrated fault modes in the first simulated fault mode.

4. The single-phase ground fault mode switching method of the distribution network real-life test platform as claimed in claim 3, characterized in that: The obtaining of the fault mode to be simulated and switching the fault mode based on the first fault switching strategy includes: Obtaining a fault mode to be simulated, wherein the fault mode to be simulated is a single-phase simulated fault mode, that is, any one phase-by-phase simulated fault mode among the three phases A, B, and C; The first fault switching strategy performs fault mode switching according to the corresponding single-phase simulated fault mode.

5. The single-phase ground fault mode switching method of the distribution network real-life test platform according to claim 4 is characterized in that: The first failover strategy also includes: The first switching strategy, the second switching strategy and the third switching strategy all include any strategy of receiving a first instruction and a second instruction and performing a switching operation according to the first instruction and the second instruction.

6. The single-phase ground fault mode switching method of the distribution network real-life test platform according to claim 5, characterized in that: The first instruction and the second instruction include: The first instruction is an instruction for controlling the phase; The second instruction is an instruction to connect to any preset grounding point.

7. The single-phase ground fault mode switching method of the distribution network real-life test platform according to claim 6, characterized in that: The preset grounding points at least include grounding points via grass, grounding points via mud, grounding points via asphalt roads, metallic grounding points, grounding points via damaged cables, and grounding points via damaged insulators.

8. A single-phase ground fault mode switching system for a distribution network real-world test platform, characterized in that: include: A data set acquisition module, used to acquire a first simulated fault mode set of a target test platform; The first simulated fault mode set includes several different fault modes; A strategy establishment module, used to establish first fault switching strategies for different phases based on the first simulated fault mode set; The switching module is used to obtain the fault mode to be simulated and perform fault mode switching based on the first fault switching strategy.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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