Field debugging test method, system and equipment for different switches and medium

Abstract

The invention discloses a field debugging test method, system and equipment for different switches, and a medium. The method comprises the following steps: acquiring electrical parameters, communication configuration and historical fault records of a pole-mounted switch; on the basis of the acquired data, detecting and verifying various parameters of the on-site pole-mounted switch in the on-site environment by using the portable debugging test equipment to complete basic function verification; on the basis of basic function verification, simulation of various fault scenes and operation conditions is carried out on different types of pole-mounted switches through a field test scheme, whether the pole-mounted switches can accurately recognize and respond to faults or not is detected, and a pole-mounted switch interface transformation verification result is obtained. And the field test time is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution automation, and particularly relates to a method, system, device and medium for on-site debugging test of different switches. BACKGROUND

[0002] With the deepening of the intelligent construction of distribution networks, pole-mounted switches controlled based on feeder terminal units (FTUs) are widely used in fault isolation and non-fault area power restoration of distribution lines. The on-site feeder automation (FA) system realizes adaptive processing of multi-branch and multi-lateral distribution network architectures through the basic logic of "no-voltage opening and incoming power delay closing", in cooperation with the reclosing action of the substation outgoing breaker. However, in actual engineering applications, the existing technology still has many deficiencies.

[0003] Firstly, the traditional on-site debugging method relies on manual operation and experience judgment, lacks standardized and automated test procedures, and it is difficult to comprehensively verify the sampling accuracy of FTU on voltage, current, power and other electrical quantities, as well as the responsiveness and timeliness of the remote signaling. Secondly, for different types of pole-mounted switches (such as sectionalizing, tie-in, and customer interface switches), their protection logic and blocking strategies differ greatly, and most of the current on-site tests only stay at the basic power-on test level, and cannot effectively simulate the directional identification, delay closing and blocking condition judgment functions under real fault scenarios.

[0004] In addition, the existing test methods often do not thoroughly verify the communication function, lack of actual interactive testing of DL / T634.5101, DL / T634.5104 and other protocols, resulting in problems such as abnormal uploading of remote measurement and remote signaling data, and failure of remote control command execution after the device is put into operation. At the same time, due to the lack of support of portable integrated test equipment, the on-site debugging efficiency is low, repetitive, and it is difficult to obtain complete test data for later analysis and problem tracing.

[0005] In summary, the current on-site test system of distribution automation terminals and pole-mounted switches has not yet formed a systematic and standardized technical specification, especially in the aspects of on-site FA logic verification, protection setting value linkage test and communication protocol consistency, there are obvious shortcomings, and it is urgent to build a comprehensive on-site debugging technical solution covering electrical parameter detection, state quantity verification, protection logic test and communication function check, to improve the operation reliability and intelligent decision-making ability of the distribution automation system. SUMMARY

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

[0007] Therefore, the present application provides a method, system, device and medium for on-site debugging test of different switches, which solves the problems of non-standard test procedures, complex operation and long power outage time of the existing test procedures.

[0008] To solve the above technical problems, the present application provides the following technical solutions:

[0009] Obtain the electrical parameters, communication configuration and historical fault records of the pole-mounted switch;

[0010] Based on the obtained data, use the portable debugging test device to detect and verify each parameter of the on-site pole-mounted switch in the on-site environment, and complete the basic function verification;

[0011] Based on the basic function verification, simulate various fault scenarios and operating conditions for different types of pole-mounted switches through an on-site test scheme, test whether the pole-mounted switch can accurately identify and respond to faults, and obtain the pole-mounted switch interface modification verification result.

[0012] As a preferred scheme of the different switch on-site debugging test method described in the present application, wherein: the basic function verification includes:

[0013] By inputting voltage and current signals of different proportions, verify whether the accuracy of the power distribution terminal in measuring electrical quantities meets the set accuracy standard;

[0014] Change the phase angle under a fixed voltage and current amplitude, test whether the error between the power factor value measured by the power distribution terminal and the true value meets the set accuracy standard;

[0015] Through simulation, verify whether the power distribution terminal can correctly collect and upload the switch position, protection action and various abnormal alarm signals, and perform priority reporting when the state changes.

[0016] The beneficial effects of the preferred technical scheme are that the performance reliability of the power distribution terminal in terms of electrical quantity measurement accuracy, power factor error control, and state quantity collection and communication function is comprehensively verified, and it is ensured that it meets the requirements of data accuracy and timely response of on-site operation.

[0017] As a preferred scheme of the different switch on-site debugging test method described in the present application, wherein: the different types of pole-mounted switches include sectional switches, boundary switches and tie switches;

[0018] The simulation of various fault scenarios and operating conditions includes:

[0019] By simulating that the fault occurs at the front end of the switch and the fault occurs at the rear end of the switch, verify whether the forward and reverse locking functions of the sectional switch after loss of voltage tripping and power-on delay closing are working normally;

[0020] Through the simulation of fault types, verify whether the boundary switch can accurately identify and respond to faults inside and outside the boundary, and perform corresponding protection actions and reclosing logic;

[0021] By simulating the single-side pressure loss condition, whether the strategy response function of the tie switch after single-side power loss is normal is verified.

[0022] The beneficial effects of the preferred technical scheme are that the system verifies the logic judgment ability and protection action reliability of different types of pole switches under complex fault scenarios, ensuring that they can accurately identify fault directions, correctly execute locking strategies, and achieve rapid isolation and power restoration in actual operation.

[0023] As a preferred scheme of the different switch field debugging test method of the application, wherein: the simulated fault occurs at the front end of the switch, including:

[0024] When the to-be-tested pole switch is a line main section switch, and the fault simulation occurs in the front end region of the switch, the to-be-tested pole switch is set to the closed state, and it is confirmed that the front end air switch and the rear end air switch are both in the closed position;

[0025] When a phase-to-phase short circuit fault occurs in the front end line of the to-be-tested pole switch, the front end air switch simulates the protection tripping action of the substation outgoing circuit breaker, and the pole switch loses voltage and opens;

[0026] When the front end air switch is re-closed and the voltage input is detected on one side of the pole switch, the pole switch will attempt to automatically close after a set delay time;

[0027] When the pole switch is closed again to the fault point, causing the front end air switch to trip again, the pole switch performs reverse locking closing operation because the actual closing time does not meet the preset time criterion.

[0028] As a preferred scheme of the different switch field debugging test method of the application, wherein: the simulated fault occurs at the front end of the switch, including:

[0029] When the to-be-tested pole switch is a line main section switch, and the fault occurs in the front end region of the switch, the to-be-tested pole switch is set to the closed state, and it is confirmed that the front end air switch and the rear end air switch are both in the closed position;

[0030] When a phase-to-phase short circuit fault occurs in the front end line of the to-be-tested pole switch, the front end air switch simulates the protection tripping action of the substation outgoing circuit breaker, and the pole switch loses voltage and opens;

[0031] When the front end air switch is re-closed and the voltage input is detected on one side of the pole switch, the pole switch will attempt to automatically close after a set delay time;

[0032] When the pole switch is closed again to the fault point, causing the front end air switch to trip again, the pole switch performs reverse locking closing operation because the actual closing time does not meet the preset time criterion.

[0033] As a preferred scheme of the different switch field debugging test method, wherein: the verification of whether the boundary switch can accurately identify and respond to the in-bounds and out-of-bounds faults and perform corresponding protection actions and reclosing logic through the simulation of the fault type comprises:

[0034] When the fault occurs in the in-bounds area of the boundary switch and the substation outgoing line breaker trips, if the boundary switch detects the fault current in the loss of voltage state, the opening operation is performed.

[0035] When the fault occurs in the out-of-bounds area of the boundary switch and the substation outgoing line breaker trips, if the boundary switch does not detect the fault current in the loss of voltage state, the closing state is maintained and the opening operation is not performed.

[0036] As a preferred scheme of the different switch field debugging test method, wherein: the verification of whether the tie switch has a normal strategy response function after the loss of voltage on one side through the simulation of the single-sided loss of voltage comprises:

[0037] When the front air switch and the rear air switch of the tie switch are both in the closed position, the normal charged operating state of the tie switch on both sides is simulated.

[0038] When the rear air switch is manually opened, causing the loss of voltage on one side of the tie switch, the tie switch detects the loss of voltage on one side and determines whether the closing condition is met according to the preset logic.

[0039] If the tie switch performs the strategy response function according to the set delay after the loss of voltage on one side, it indicates that the field test test scheme is running normally.

[0040] In a second aspect, the present application provides a different switch field debugging test system, comprising:

[0041] An acquisition module is configured to acquire electrical parameters, communication configurations and historical fault records of the pole-mounted switch.

[0042] A basic function test module is configured to detect and verify various parameters of the pole-mounted switch in the field environment based on the acquired data, using a portable debugging test device, and complete the basic function verification.

[0043] A field test test scheme verification module is configured to simulate different fault scenarios through the field test test scheme test based on the basic function verification, test whether the pole-mounted switch can accurately identify and respond to various types of faults, and obtain the pole-mounted switch interface modification verification result.

[0044] In a third aspect, the present application provides an electronic device, comprising:

[0045] A memory is configured to store a program.

[0046] a processor for executing the computer executable instructions, which, when executed by the processor, implement the steps of the different switch field commissioning test method.

[0047] In a fourth aspect, the present application provides a computer readable storage medium comprising the program which, when executed by a processor, implements the steps of the different switch field commissioning test method.

[0048] The present application has the following beneficial effects: by acquiring basic data such as electrical parameters of pole-mounted switches, communication configurations and historical fault records, the running state of the equipment is comprehensively mastered, and accurate basis is provided for subsequent testing and strategy configuration; by using a portable commissioning test device to perform field detection and verification on voltage, current, power factor and remote signaling signals, the measurement accuracy and state quantity response capability of the power distribution terminal are effectively confirmed, and the field commissioning efficiency and standardization level are improved; by simulating different fault positions (front end / back end) and fault types (phase-to-phase short circuit, single-phase grounding), the FA logic response behavior of sectionalizing switches, boundary switches and tie switches is verified, and the comprehensive verification of the fault identification, direction determination and automatic isolation and power restoration capability of the pole-mounted switches under complex distribution network environment is realized. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0050] Figure 1 A basic flowchart of a different switch field commissioning test method provided for an embodiment of the present application;

[0051] Figure 2 A field test wiring diagram of a different switch field commissioning test method provided for an embodiment of the present application;

[0052] Figure 3 A power distribution network framework diagram of a different switch field commissioning test method provided for an embodiment of the present application;

[0053] Figure 4 A main line phase-to-phase short circuit fault diagram of a different switch field commissioning test method provided for an embodiment of the present application;

[0054] Figure 5 A diagram of a fault occurring at the back end of a switch of a different switch field commissioning test method provided for an embodiment of the present application;

[0055] Figure 6 A fault of a different switch on-site commissioning test method provided for an embodiment of the application occurs in a switch front-end schematic diagram. DETAILED DESCRIPTION

[0056] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0057] Embodiment 1, refer to Figure 1 For an embodiment of the present application, a different switch on-site commissioning test method is provided, comprising:

[0058] S100: Obtain the electrical parameters, communication configuration and historical fault record of the pole-mounted switch;

[0059] S200: Based on the obtained data, use a portable commissioning test device to detect and verify each parameter of the on-site pole-mounted switch in the field environment, complete the basic function verification;

[0060] S300: Based on the basic function verification, through the on-site test scheme, simulate various fault scenes and operating conditions for different types of pole-mounted switches, test whether the pole-mounted switch can accurately identify and respond to faults, and obtain the pole-mounted switch interface modification verification result.

[0061] It should be noted that the existing test process faces a series of challenges during operation, mainly including: first, the traditional warehouse modification method is high in cost and low in efficiency, not only needs to be powered off and replace the old switch through rotation, but also consumes a large amount of human and material resources. Second, in the face of a large number of non-standardized stock pole-mounted switches, due to their various specifications, missing drawings, incomplete functions and other problems, the interchangeability of primary and secondary equipment is poor, which increases the complexity of on-site commissioning and upgrading. Third, the reliable operation of equipment in a strong electromagnetic environment is a major test, and the existing standards are difficult to meet the needs of equipment anti-strong electromagnetic interference under the primary and secondary fusion structure. In addition, sensor reliability problems occur frequently, such as high and low temperature test over-limit value, unqualified fire and flame retardant, etc., which affects the overall stability of the system. Finally, in the process of realizing the self-healing of the distribution network, different self-healing modes have different requirements for communication quality, network structure and real-time performance, which brings additional technical difficulties and operational complexity to actual deployment. These challenges jointly restrict the improvement and wide application of the performance of the distribution automation system.

[0062] Therefore, in view of the problems of the existing test process, such as non-standardization, complex operation, and long power outage time, a portable on-site debugging test device is developed through steps S100-S300, which provides a feasible scheme for verifying the function and performance of the modified on-site switch; and a field FA function test scheme based on program control design is further proposed, in which the control mode, variation, and determination criteria are preset in the tester, so as to replace the user to realize automatic variation of variables and result determination, and shorten the on-site test time.

[0063] Embodiment 2, with reference to Figures 2-6 and Table 1, an embodiment of the present application provides a different switch on-site debugging test method based on the previous embodiment, which comprises the following steps:

[0064] In the embodiment of the present application, the portable on-site debugging test device in step S200 is shown in Table 1.

[0065] Table 1: Field test equipment and function table

[0066]

[0067] In an alternative embodiment, the portable on-site debugging test device in step S200 can also use a remote monitoring and control system (such as a SCADA system or a dedicated remote test platform) to remotely control and monitor the pole-mounted switch and its FTU through an existing communication network.

[0068] In another alternative embodiment, the portable on-site debugging test device in step S200 can also develop a modular programmable test platform that allows users to customize test procedures and parameter settings according to specific needs, integrates multiple test modules, and supports automated test processes.

[0069] In the embodiment of the present application, the basic function verification in step S200 includes AC power frequency input error test, state quantity input test, CT ratio test, etc. The distribution terminal operation and maintenance tester is linked to the switch and FTU terminal as shown in Figure 2 The tester uses XINPU XINPU OS series wearable automatic terminal tester with program control configuration function, which has 4-way 264V voltage + 4-way 10A current output, all voltage and current phases can be simultaneously loaded and output, has 4 pairs of input and 4 pairs of output, and the opening and closing of the output is controlled by software. The software test function is rich, which can test the three remote, FA logic, and conventional protection of the FTU, DTU, and other distribution automation terminal devices. It supports automatic testing of the performance of the distribution network automation terminal and network self-healing test.

[0070] In the embodiment of the present application, the basic function verification includes:

[0071] By inputting voltage and current signals of different proportions, verify whether the accuracy of the power distribution terminal in measuring electrical quantities meets the set accuracy standard;

[0072] By changing the phase angle under fixed voltage and current amplitude, verify whether the accuracy of the power distribution terminal in measuring power factor meets the set accuracy standard;

[0073] By simulation, verify whether the power distribution terminal can correctly collect and upload switch position, protection action and various abnormal alarm signals, and prioritize reporting when the state changes.

[0074] In the embodiments of the present application, the basic error test of AC power frequency input quantity includes basic error tests of voltage, current, active power, reactive power and power factor:

[0075] 1) Voltage, current, active power and reactive power basic error test

[0076] Test basis: Q / CSG 1203077-2021 Technical Specification for Distribution Automation Feeder Terminal 4.4a)

[0077] Test requirements: The measurement accuracy of AC sampling voltage and current should reach 0.5 level; the measurement accuracy of active power and reactive power should reach 1.0 level.

[0078] Test method:

[0079] The voltage and current signals with frequency of 50Hz and harmonic component of 0 are output by the relay protection tester on site, and 0, 20%, 40%, 60%, 80%, 100%, 120% of the voltage rated value and 0, 20%, 40%, 60%, 80%, 100%, 120% of the current rated value are input in turn. The terminal voltage, current, active power and reactive power measurement values are read on the standardized FTU device, and the basic error is calculated.

[0080] 2) Power factor basic error test

[0081] Test basis: DL / T 1529-2016 Distribution Automation Terminal Device Detection Regulation B.1.2a)

[0082] Test requirements: The power factor error limit is 2 level;

[0083] Test method: Keep the output voltage and current of the relay protection tester at rated value, the frequency at 50Hz, and the phase angle at 0°, ±30°, ±45°, ±60°, ±90° respectively, read the terminal power factor measurement value, and calculate the basic error.

[0084] In an alternative embodiment, the power factor measurement in step S200 can also set up a dynamic load simulator that can simulate real load changes, define a series of typical load conditions (such as light load, heavy load, inductive load, capacitive load, etc.) according to the actual application scenario, and set the corresponding power factor values. At the same time, collect the voltage, current and power factor data of the same time period from the power distribution terminal and the dynamic load simulator, compare the power factor value calculated by the power distribution terminal with the reference value provided by the dynamic load simulator, evaluate its measurement accuracy, and record any deviation or abnormality. If significant deviations are found, the internal algorithm or parameter settings of the power distribution terminal can be adjusted for correction.

[0085] In another alternative embodiment, the power factor measurement in step S200 can use high-precision voltage and current sensors and high-speed data acquisition cards to continuously collect voltage and current signals over a period of time, obtain a large number of sample data points, process the collected data, and calculate the instantaneous power factor value at each time point. Then, use statistical analysis methods (such as mean, standard deviation, etc.) to determine the average power factor value and its fluctuation range in the entire time period, compare the calculated average power factor value with the known standard value, evaluate whether the measurement error is within the allowable range, and record any significant deviations.

[0086] 3) State quantity (remote signaling) input test

[0087] Test basis: Q / CSG 1203077-2021 Power Distribution Automation Feeder Terminal Technical Specification 4.3.2a)

[0088] Test requirements: Remote signaling quantity collection includes: switch position, remote / local switching handle position, protection (including overcurrent, ground) action, fault information, terminal abnormality or fault, switch operating mechanism abnormality, working power supply abnormality, battery low voltage alarm, battery under-voltage removal, telemetering out-of-limit alarm signal, etc. information, and send to the power distribution automation master station, state variable position priority transmission. The above remote signaling variable position check is completed by field operation or load simulation.

[0089] Test method: During the test, the switch position, energy storage state, remote / local switching handle position, and protection (including overcurrent, ground) action are tested by field operation.

[0090] 4) CT ratio test

[0091] A tester can be used to apply a primary current to the terminal under test, and the secondary current of the terminal under test is sampled to calculate the ratio of the two, and the CT ratio is obtained.

[0092] By setting the primary current value output by the tester, the secondary current from the terminal under test can be extracted, and the CT transformation ratio can be obtained by calculating the ratio of the primary theoretical current value to the extracted secondary current.

[0093] In the embodiments of the present application, the field test test scheme in step S300 includes that when the switch to be transformed is a sectionalizing switch, a tie-in switch, or a user interface switch, the functional test content and functional requirements of the on-site FA logic protection should be different.

[0094] In an optional implementation, the field test test scheme in step S300 can also use professional power system simulation software (such as RTDS, OPAL-RT, etc.) to establish a detailed simulation model including the power grid topology, load characteristics, and fault types; connect the column switch to be tested, the FTU and other related devices to the simulation platform, real-time receive signals from the simulation environment, and feedback the state information of itself; according to the preset test plan, simulate various working conditions (such as normal operation, short-circuit fault, ground fault, etc.) in the simulation environment, observe and record the actual response of the device; analyze the test results, identify potential problems, and adjust the device configuration or control logic until the design requirements are met.

[0095] In another optional implementation, the field test test scheme in step S300 can also construct a detailed digital twin model based on the technical parameters, historical data and operating environment of the column switch and its FTU; real-time collect the operating data of the field device through the sensor network and the communication module, and transmit it to the digital twin platform; set different test scenarios (such as load change, weather influence, etc.) on the digital twin platform, and observe whether the behavior of the virtual model meets the expectation, and according to the feedback provided by the digital twin model, continuously optimize the design of the device, the maintenance strategy and the operation procedures.

[0096] In the embodiments of the present application, as shown in Figure 3 Fig. 1 is a schematic diagram of a 10kV distribution network, wherein CB represents a 10kV feeder outlet circuit breaker with time-limited protection and reclosing function; FS1-FS6 represent sectionalizing switches; LSW1-LSW2 represent tie-in switches; YS1-YS2 represent user interface switches.

[0097] In the embodiments of the present application, the adaptive comprehensive feeder automation is realized by the mode of "no-voltage opening and incoming power delay closing", combined with short-circuit / ground fault detection technology and fault path priority processing control strategy, cooperating with the secondary closing of the substation outlet switch, to realize the adaptive fault location and isolation of the multi-branch multi-tie distribution network, to isolate the fault interval by primary closing and to restore the power supply of the non-fault section by secondary closing.

[0098] In the embodiments of the present application, as shown inFigure 4 As shown, if a permanent interphase short circuit fault occurs between the trunk section switch FS2 and FS3, FS1 and FS2 detect the fault current and memorize, at this time, the CB protection trips, after tripping, FS1-FS6 are opened by Z time delay voltage loss. After CB reclosing, FS1 side has voltage and fault current memory, and X time short delay closing.

[0099] In the embodiment of the present application, FS2 has voltage on one side and fault current memory, and also passes X time short delay closing. FS2 is closed to the fault point, CB trips again, FS1 and FS2 are opened by voltage loss, FS2 is forward locked and closed, and FS3 is reverse locked and closed. CB recloses again, FS1 will pass X time short delay closing again. At this time, the fault will be isolated between FS2 and FS3.

[0100] In the embodiment of the present application, as shown in Figure 5 If the switch to be transformed is a section switch, the FTU should be configured in section mode during field test. If the switch to be transformed in the field is a trunk section switch FS2, that is, the fault occurs at the rear end of the switch, during field test, the switch to be tested should be in the closed state, and air switch 1 and air switch 2 are both closed. When a fault occurs in the rear end of FS2 at a certain moment, air switch 1 simulates CB breaker opening, and the pole-mounted switch is opened by voltage loss. After air switch 1 is closed, the pole-mounted switch senses voltage on one side, and is closed by delay X time. Re-closing to the fault point causes air switch 1 to trip again, at this time, the pole-mounted switch should be forward locked and closed.

[0101] In the embodiment of the present application, as shown in Figure 6 If the switch to be transformed in the field is a trunk section switch FS3, that is, the fault occurs at the front end of the switch, during field test, the switch to be tested should be in the closed state, and air switch 1 and air switch 2 are both closed. When a fault occurs in the front end of FS3 at a certain moment, air switch 1 simulates CB breaker opening, and the pole-mounted switch is opened by voltage loss. After air switch 1 is closed, re-closing to the fault point causes air switch 1 (CB breaker) to trip again, at this time, the pole-mounted switch FS3 should be reverse locked and closed because the closing time does not satisfy Y time.

[0102] In the embodiment of the present application, if the switch to be transformed is a section switch, the FTU should be configured in section mode during field test. If the switch to be transformed in the field is a trunk section switch FS2, that is, the fault occurs at the rear end of the switch, during field test, the switch to be tested should be in the closed state, and air switch 1 and air switch 2 are both closed. When a fault occurs in the rear end of FS2 at a certain moment, air switch 1 simulates CB breaker opening, and the pole-mounted switch is opened by voltage loss. After air switch 1 is closed, re-closing to the fault point causes air switch 1 (CB breaker) to trip again, at this time, the pole-mounted switch FS3 should be reverse locked and closed because the closing time does not satisfy Y time.

[0103] In an optional embodiment, the step S300 of verifying whether the boundary switch can accurately identify and respond to faults inside and outside the boundary can also use the standard communication protocol (such as IEC 61850 or DL / T634.5104) between the power distribution terminal (FTU) and the master station system to remotely send analog fault signals or remote signaling signals to verify whether the boundary switch can correctly determine the fault area according to the received signals and perform corresponding operations.

[0104] In another optional embodiment, the step S300 of verifying whether the boundary switch can accurately identify and respond to faults inside and outside the boundary can also use artificial intelligence (AI) technology to build a fault identification model, learn from a large amount of historical fault data, train the model to identify fault characteristics inside and outside the boundary, and embed the model into the FTU or use it as an auxiliary decision tool to verify whether the boundary switch has the ability to accurately identify faults inside and outside the boundary.

[0105] According to the principle of voltage-time / current-type collaborative self-healing: the branch line and user boundary switch should be configured with a voltage and current type circuit breaker, and the branch line and user boundary switch should be configured with a 0-second trip differential protection.

[0106] If the switch is used as a user boundary switch after reconstruction, the on-site test items should include overcurrent test, zero sequence test, reclosing and post-acceleration test, etc.

[0107] In the embodiments of the present application, the test steps of the overcurrent test include:

[0108] ① The tester outputs 57.74V to the A, B, and C phase voltages of the FTU, the switch is in the closed state, and there is no energy storage at this time, and the line is operating normally

[0109] ② The tester selects the fault type: AB phase-to-phase short circuit, 1.05 times overcurrent I section, positive fault, transient fault, and determines the output;

[0110] ③ Delay 0s, switch off;

[0111] ④ The tester selects the fault type: AB phase-to-phase short circuit, 0.95 times overcurrent I section, positive fault, transient fault, and determines the output;

[0112] ⑤ The switch does not trip;

[0113] ⑥ The tester selects the fault type: BC phase-to-phase short circuit, 1.05 times overcurrent II section, positive fault, transient fault, and determines the output;

[0114] ⑦ Delay 0.5s, switch off;

[0115] ⑧ The tester selects the fault type: BC phase-to-phase short circuit, 0.95 times overcurrent II section, positive fault, transient fault, and determines the output;

[0116] 9. Delay 0.5s, switch not tripped;

[0117] 10. Tester fault type selection: CA phase-to-phase short circuit, 1.05 times overcurrent III section, forward fault, transient fault, determine output;

[0118] Delay 2s, switch tripped;

[0119] Tester fault type selection: CA phase-to-phase short circuit, 0.95 times overcurrent III section, forward fault, transient fault, determine output;

[0120] Delay 2s, switch not tripped;

[0121] Among them, the output of large current can be realized by the way of three-phase parallel of the tester.

[0122] In the embodiment of the present application, the test steps of zero sequence test include:

[0123] 1. Tester Ua, Ub, Uc output 57.74V to FTU A, B, C phase voltage, switch in the closed state, no energy storage, at this time the line is running normally.

[0124] 2. Tester fault type selection: A phase grounding, 1.05 times zero sequence I section, in-bounds fault (forward fault), transient fault, determine output;

[0125] 3. Switch tripped after 2s.

[0126] 4. Tester fault type selection: A phase grounding, 0.95 times zero sequence I section, in-bounds fault (forward fault), transient fault, determine output;

[0127] 5. Switch not tripped.

[0128] 6. Tester fault type selection: A phase grounding, 1.05 times zero sequence I section, out-of-bounds fault (reverse fault), transient fault, determine output;

[0129] 7. Switch not tripped.

[0130] 8. Tester fault type selection: A phase grounding, 0.95 times zero sequence I section, out-of-bounds fault (reverse fault), transient fault, determine output;

[0131] 9. Switch not tripped.

[0132] In the embodiment of the present application, the test steps of reclosing and post-acceleration test include:

[0133] 1. The tester Ua, Ub, Uc outputs 57.74V to FTU of A, B, C phase voltage, the switch is in the closed state, and no energy is stored, at this time, the line is normally operated.

[0134] 2. The tester fault type selection: three-phase short circuit, 1.05 times short circuit current, positive fault, permanent fault, and determination of output;

[0135] 3. Delay 0.5s, switch opening, delay 0.5s, first reclosing of the switch;

[0136] 4. 0s after closing, switch opening, delay 2s, second reclosing of the switch.

[0137] 5. 0s after closing, switch opening, and latching closing.

[0138] In the embodiment, if the switch to be transformed is a tie switch, the FTU should be configured in the tie switch mode and in the opening state during the field test. The front air switch 1 and the rear air switch 2 of the tie switch are both closed, simulating the state that both sides of the tie switch are electrified during normal operation. When the air switch 2 is manually opened at a certain time, if the tie switch will delay closing or alarm after single-side voltage loss, it is proved that the FA logic protection function of the switch is normal.

[0139] Embodiment 3, this is an embodiment of the application, which is different from the first embodiment in that a different switch field debugging test system is provided.

[0140] It should be noted that the technical scheme of the different switch field debugging test system belongs to the same concept as the technical scheme of the different switch field debugging test method described above. The details of the technical scheme of the different switch field debugging test system in the embodiment are not described in detail, and can be referred to the description of the technical scheme of the different switch field debugging test method.

[0141] The different switch field debugging test system in the embodiment comprises:

[0142] The embodiment further provides an electronic device suitable for the case of the different switch field debugging test method, comprising:

[0143] The memory is used for storing computer executable instructions, and the processor is used for executing the computer executable instructions to realize the different switch field debugging test method proposed in the above embodiment.

[0144] The embodiment further provides a storage medium having a computer program stored thereon, and the program is executed by the processor to realize the different switch field debugging test method proposed in the above embodiment.

[0145] The storage medium provided in the embodiment belongs to the same inventive concept as the method for implementing a different switch field debugging test provided in the above embodiment, and the technical details not described in the embodiment can be seen from the above embodiment, and the embodiment has the same beneficial effects as the above embodiment.

[0146] Through the above description of the embodiments, those skilled in the art can clearly understand that the present application can be realized by means of software and necessary universal hardware, and of course can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a floppy disk, a read-only memory (ROM), a random access memory (RAM), a FLASH, a hard disk or an optical disk, etc., including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method of each embodiment of the present application.

[0147] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, and although the present application 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 application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A method for testing on-site commissioning of different switches, characterized in that: include: Obtain electrical parameters, communication configuration and historical fault records of pole-mounted switches; Based on the acquired data, various parameters of the on-site pole-mounted switch are tested and verified in the field environment using portable debugging test equipment to complete basic functional verification; Based on basic function verification, through field test plans, various fault scenarios and operating conditions are simulated for different types of pole-mounted switches to test whether the pole-mounted switches can accurately identify and respond to faults, and obtain the pole-mounted switch interface modification verification results.

2. The on-site debugging test method for different switches according to claim 1, characterized in that: The basic function verification includes: By inputting voltage and current signals of different proportions, verify whether the accuracy of electrical quantity measurement of the distribution terminal meets the set accuracy standards; Changing the phase angle at fixed voltage and current amplitudes to verify whether the power factor measurement accuracy of the distribution terminal meets the set accuracy standards; Through simulation, verify whether the distribution terminal can correctly collect and upload switch positions, protection actions and various abnormal alarm signals, and give priority to reporting when the status changes.

3. The on-site debugging test method for different switches according to claim 1 or 2, characterized in that: The different types of pole switches include section switches, boundary switches and tie switches; The simulation of various failure scenarios and operating conditions includes: By simulating faults at the front and rear ends of the switch, verify whether the forward and reverse blocking functions of the sectionalizer are working properly after voltage loss opening and power-on delayed closing. By simulating fault types, it is verified whether the boundary switch can accurately identify and respond to internal and external faults, and execute corresponding protection actions and reclosing logic; By simulating a single-side voltage loss situation, it is verified whether the strategic response function of the tie switch after a single-side power loss is normal.

4. The on-site debugging test method for different switches according to claim 3, characterized in that: The simulated fault occurs at the front end of the switch, including: When the pole switch to be tested is a line trunk sectionalizer, and the fault simulation occurs in the front area of ​​the switch, set the pole switch to be tested to the closed state, and confirm that the front air switch and the rear air switch are both in the closed position; When a phase-to-phase short circuit fault occurs in the front-end line of the pole-mounted switch to be tested, the front-end air switch simulates the substation outgoing line circuit breaker to perform a protection tripping action, and the pole-mounted switch loses pressure and opens; When the front air switch is closed again and voltage input is detected on the pole switch side, the pole switch will try to close automatically after the set delay time; When the pole-mounted switch is closed to the fault point again, causing the front-end air switch to trip for the second time, the pole-mounted switch performs a reverse locking closing operation because the actual closing moment does not meet the preset time criterion.

5. The on-site debugging test method for different switches according to claim 4, characterized in that: The simulated fault occurs at the front end of the switch, including: When the pole switch to be tested is a line trunk sectionalizer and the fault occurs in the rear area of ​​the switch, set the pole switch to be tested to the closed state and confirm that both the front air switch and the rear air switch are in the closed position; When a phase-to-phase short circuit fault occurs in the rear-end line of the pole-mounted switch to be tested, the front-end air switch simulates the substation outgoing line circuit breaker to perform a protective tripping action, and the pole-mounted switch loses pressure and opens; When the front air switch is closed again and voltage input is detected on the pole switch side, the pole switch will try to close automatically after the set delay time; When the circuit breaker is closed again to the fault point and the front air switch trips for the second time, the pole-mounted switch judges it as a forward fault based on the fault current memory and performs a forward locking closing operation.

6. The on-site debugging test method for different switches according to claim 5, characterized in that: The above-mentioned fault type simulation verifies whether the boundary switch can accurately identify and respond to internal and external faults and execute corresponding protection actions and reclosing logic, including: When a fault occurs in the boundary area of ​​the demarcation switch and the substation outgoing circuit breaker trips, if the demarcation switch detects a fault current in the de-voltage state, it will perform the tripping operation; When a fault occurs in the area outside the boundary switch and the substation outgoing line circuit breaker trips, if the boundary switch does not detect the fault current in the de-voltage state, it will remain in the closed state and will not perform the opening operation.

7. The on-site debugging test method for different switches according to claim 6, characterized in that: The simulation of a single-side voltage loss situation is used to verify whether the strategic response function of the tie switch after a single-side power loss is normal, including: When the front air switch and the rear air switch of the tie switch are both in the closed position, the normal energized operation state of both sides of the tie switch is simulated; When the rear air switch is manually opened, causing pressure loss on one side of the tie switch, the tie switch will determine whether the closing conditions are met based on the preset logic after detecting the pressure loss on one side; If the tie switch executes the strategic response function according to the set delay after the pressure is lost on one side, it indicates that the field test plan is running normally.

8. A field debugging test system for different switches, applying the method according to any one of claims 1 to 7, characterized in that: include: Acquisition module, obtains the electrical parameters, communication configuration and historical fault records of the pole switch; The basic function test module is used to test and verify various parameters of the on-site pole switch in a field environment based on the acquired data using portable debugging test equipment to complete basic function verification; The field test scheme verification module is used to verify the basic functions. Through the field test scheme, various fault scenarios and operating conditions are simulated for different types of pole switches to test whether the pole switches can accurately identify and respond to faults, and obtain the pole switch interface modification verification results.

9. An electronic device, characterized in that: include: Memory, used to store programs; A processor, configured to load the program to execute the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a program, characterized in that: When the 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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