Mechanical characteristic test system for multi-substation multi-interval circuit breaker

Abstract

The invention provides a mechanical characteristic test system for a multi-substation multi-interval circuit breaker. The mechanical characteristic test system comprises a mechanical characteristic tester, a plurality of safety locking devices, a plurality of automatic bunching devices, a speed sensor, a closing device, an opening device, a locking device, an energy storage secondary control loop, an aviation plug calibration device, a data processing and automatic test device, a substation total system host and a cloud server, the closing, opening, locking and energy storage secondary control loop is connected with the circuit breaker aviation plug, the opening, closing, locking, energy storage and common port on the mechanical characteristic tester is connected with the corresponding port of the closing, opening, locking and energy storage secondary control loop through a lead, and the speed sensor is connected with the circuit breaker operating mechanism. The A phase, the B phase and the C phase of the mechanical characteristic tester are respectively connected to the A phase, the B phase and the C phase of the circuit breaker through leads, and the data processing and automatic testing device is connected with the mechanical characteristic tester through a lead to form a testing loop for testing the mechanical characteristics of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment detection, and particularly to a mechanical characteristic test system for multi-interval circuit breakers in multiple substations. Background Art

[0002] A circuit breaker is the only power equipment that can cut off and connect the main circuit in the power grid power transmission. Its working stability is directly related to the safety and stability of the power grid. When there are faults such as short circuit grounding and reclosing to the faulty line in the high-voltage circuit, the circuit breaker needs to complete the important tasks of cutting off large currents and isolating faults. The tests of the circuit breaker mainly include mechanical characteristic tests, loop resistance tests, withstand voltage tests, and secondary circuit detections. The mechanical characteristic test is directly related to the circuit-breaking ability of the circuit breaker. Moreover, this test involves many items and complex wiring. It is easy to connect the wires wrongly on-site, which may easily lead to test failures, burning out of closing and tripping coils, and damage to equipment and other serious consequences. In addition, there are many wires, the on-site wires are relatively messy, and the risk of electric shock is relatively high. Therefore, it is necessary to develop a mechanical characteristic test device with safety locking, which can automatically retract and release wires and identify and analyze equipment test data.

[0003] When improving the conventional mechanical characteristic test device, the main considerations are stable wire clamping and non-crossing of lines, or reducing the number of wire connections and making integrated joints during the mechanical characteristic test process. Each small test item is selected for separate wiring, which will cause the complexity of wiring and wire replacement. Some scholars have improved and made auxiliary slide rails to reduce the complexity of wire replacement, but there are still problems such as low work efficiency and poor test repeatability. The integrated joint reduces the wire complexity, but the wire length still does not exactly match the distance between the instrument and the equipment, and the problem of wire storage has not been solved. Most of the data statistics and analysis of the test personnel in the substation rely on manual recording and calculation, and the automation degree is too low. Some scholars have proposed using a high-speed camera for test recording, calculation, and subsequent analysis. However, the high-speed camera has a high cost, and when there are major power protection tasks, when the test data of many devices in multiple substations need to be recorded and analyzed, it will take a lot of time and labor, and the practicability is poor.

[0004] Patent CN11246249B discloses a wiring auxiliary device for circuit breaker tests, which includes a card seat, several slide rail bars, and wiring terminals. The card seat includes two oppositely arranged seat bodies and two end plates. The two ends of the end plates are respectively connected to the two seat bodies, and the two end plates are respectively located at the two ends of the seat bodies. The slide rail bars are located between the two end plates. The two ends of the slide rail bars are respectively connected to the two seat bodies and can slide along the length direction of the seat bodies. The wiring terminals are passed through the slide rail bars and can slide along the length direction of the slide rail bars. The slide rail bars can be moved above the terminals to be connected for positioning. Although the wiring can be changed by sliding the wiring terminals and the adjacent wirings are designed to be misaligned, when facing multiple mechanical characteristic tests, the repeatability of the tests is poor, and the sliding of the wiring rail essentially requires a high degree of care from the operator and is prone to errors. The problem of troublesome wire storage after the test has not been solved. Summary of the Invention

[0005] In view of the problems existing in the prior art, it is necessary to propose a mechanical characteristic test system for circuit breakers in multiple substations and multiple intervals to avoid frequent wire replacement and sorting out messy wirings, and improve the test safety, repeatability, and work efficiency.

[0006] To achieve the above object, an embodiment of the present invention provides a mechanical characteristic test system for circuit breakers in multiple substations and multiple intervals, including: a mechanical characteristic tester, several safety locking devices, several automatic wire bundlers, closing, opening, locking, energy storage secondary control circuits, an aviation plug calibration device, a speed sensor, a data processing and automatic test device, a substation total system host, and a cloud server.

[0007] The closing, opening, locking, and energy storage secondary control circuits are connected to the circuit breaker aviation plug. The ports of the opening, closing, locking, energy storage, and common terminal on the mechanical characteristic tester are connected to the corresponding ports of the closing, opening, locking, and energy storage secondary control circuits through wires. The speed sensor is connected to the circuit breaker operating mechanism. The A-phase, B-phase, and C-phase on the mechanical characteristic tester are respectively connected to the upper contacts of the A-phase, B-phase, and C-phase of the circuit breaker through wires. The lower contacts of the A, B, and C phases of the circuit breaker are short-circuited and then connected to the common terminal on the mechanical characteristic tester through wires. The data processing and automatic test device is connected to the corresponding ports on the mechanical characteristic tester through wires to form a test circuit for circuit breaker mechanical characteristic testing.

[0008] The aviation plug calibration device is arranged at the end of the wiring of the closing, opening, locking, and energy storage secondary control circuits and is connected to the circuit breaker aviation plug for verifying whether the wiring is correct.

[0009] The speed sensor is used to transmit the detected circuit breaker closing and opening signals to the sensor port on the mechanical characteristic tester.

[0010] The automatic wire bundler is set at the position where wire connection is required. When wire connection is needed between two devices, the automatic wire bundler pulls out the wire for connection.

[0011] The safety locking device is set on all primary wiring except for the grounding point of the mechanical characteristic tester and the two wire connections of the aviation plug. The telescoping of the wire is limited by the locking electromagnet.

[0012] The data processing and automatic test device is used to take photos of the breaker's petal contacts and identify the burned traces and conductive paste coating situation with one key. After all devices in the test system are connected and powered on, it sends a test command to the mechanical characteristic tester to complete one-key testing. Subsequently, it reads the test data recorded by the mechanical characteristic tester and selects the terminal-edge-cloud to further send the test data, analyze and judge, and return the analysis results. Here, the terminal, edge, and cloud are the data processing and automatic test device, the main host of the substation total system, and the cloud server respectively.

[0013] The mechanical characteristic tester is used to connect or disconnect the corresponding functional terminal pairs according to the test items to be executed, and send a DC pulse signal corresponding to the test item to complete the mechanical characteristic test of the breaker by controlling the opening and closing operations of the breaker.

[0014] The main host of the substation total system is used to receive the test data recorded by the mechanical characteristic tester for analysis and judgment when the mechanical characteristic tests of breakers are carried out in multiple intervals in the substation.

[0015] The cloud server is used to receive the test data recorded by the mechanical characteristic tester for analysis and judgment when the mechanical characteristic tests of breakers are carried out in multiple substations, and is also used to summarize the analysis results of the terminal test data, the edge test data, and the cloud test data.

[0016] When the breaker mechanical characteristic test system conducts a mechanical characteristic test on the breaker, it is configured to perform the following steps: (1) Conduct a mechanical characteristic test after the breaker is in the maintenance position and its internal energy is released.

[0017] (2) The mechanical characteristic tester device is first grounded through the automatic wire bundler, automatically releases the locking of the locking electromagnets of other wiring by means of electrifying and attracting, connects the closing, opening, locking, and energy storage secondary control circuits to the breaker aviation plug, and ensures that the aviation plug calibration device does not alarm.

[0018] (3) The data processing and automatic test device takes photos of the breaker's petal contacts and identifies the burned traces and conductive paste coating situation with one key. After all devices in the test system are connected and powered on, it sends a test command to the mechanical characteristic tester to complete one-key testing.

[0019] After the test, the data processing device reads the test data recorded by the mechanical characteristic tester, and selects the terminal-edge-cloud to further send the test data, photos of the breaker petal contacts, analyze and judge, and return the analysis results, and upload to the cloud for data summary.

[0020] Optionally, the automatic wire bundler mainly consists of a wire bundling frame, a spring, a housing, and flat shell wires, and can automatically organize, store, and stretch the wires.

[0021] Optionally, the data processing and automatic test device includes a PCB board, a processor, a memory, a vision sensor, and a photoelectric sensor. The processor, memory, vision sensor, and photoelectric sensor are all welded on the PCB board. The processor adjusts the pulse of the mechanical characteristic tester through the photoelectric sensor to send out a pulse signal, and then issues a test instruction to the breaker to complete one-key testing. The vision sensor takes photos of the breaker petal contacts, and then reads the test data recorded by the mechanical characteristic tester and the photos of the breaker petal contacts into the memory. Finally, the processor calls the standard data in the memory and the imported data in the notepad memory, analyzes the test results, and uploads them to the cloud server for data summary.

[0022] Optionally, the data processing and automatic test device selecting the terminal-edge-cloud specifically includes: calculating the overhead of unloading the test data from the terminal to the cloud, and weighing whether to process the test data by itself in the substation or upload it to the cloud for processing according to the size of the overhead. The specific formula is as follows: .

[0023] .

[0024] .

[0025] Among them, represents the offloading delay between the edge and the cloud, represents the offloading energy consumption between the edge and the cloud, represents the size of the input data in the cloud, represents the size of the response data after cloud computing, R represents the transmission rate from the edge to the cloud node, represents the overhead of the edge offloading data to the cloud, and β represents the weight coefficient of the offloading delay.

[0026] Optionally, a digital barcode is added beside the aviation plug socket, and the data collector of the aviation plug calibration device identifies the digital barcode of the aviation plug. If there is an inconsistent recognition situation, an alarm signal is sent.

[0027] After adopting the above technical solutions, the present invention has at least the following beneficial effects: The present invention can avoid frequent wire replacement and disorganized wire arrangement during the mechanical characteristic test, reduce the wiring complexity, improve the test reliability and repeatability; the direct interlocking of the wirings can ensure electrical safety and prevent equipment damage caused by operation errors; it can automatically select the data analysis strategy according to the number of test data, improving the work efficiency and test reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 FIG. is a schematic structural diagram of a mechanical characteristic test system for multi-substation multi-interval circuit breakers provided by an embodiment of the present disclosure.

[0030] Figure 2 FIG. is a schematic structural diagram of an automatic wire bundler.

[0031] Figure 3 FIG. is a schematic structural diagram of a flat-shell wire with built-in ABC three-phase line types.

[0032] Figure 4 FIG. is a directed acyclic graph representing the relationship between subtasks.

[0033] Figure 5 FIG. is a test data flow diagram of the terminal-edge-cloud.

[0034] Figure 6 FIG. is a flowchart of the mechanical characteristic test for multi-substation multi-interval circuit breakers.

[0035] Figure 7 FIG. shows the delay and energy consumption characteristics of the terminal-edge-cloud offloading strategy, the task is fully executed on the local terminal, the task is fully offloaded to the optimal edge node for execution, the task is fully offloaded to the cloud for execution, and the distributed offloading strategy based on the binary-coded genetic algorithm. (a) is the curve of the delay of the five task processing methods varying with the number of tasks, and (b) is the curve of the energy consumption of the five task processing methods varying with the number of tasks. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0037] The following uses specific embodiments to describe the solution of the present invention in detail: Reference Figure 1 , a mechanical characteristic test system for multi-substation multi-interval circuit breakers provided by an embodiment of the present disclosure includes: a mechanical characteristic tester, a plurality of safety locking devices, a plurality of automatic wire bundlers, closing, opening, locking, energy storage secondary control circuits, a connector calibration device, a speed sensor, a data processing and automatic test device, a substation total system host, and a cloud server.

[0038] In this embodiment, the closing, opening, locking, and energy storage secondary control circuits are connected to the circuit breaker aviation plug. The ports of the opening, closing, locking, energy storage, and common terminal on the mechanical characteristic tester are connected to the corresponding ports of the closing, opening, locking, and energy storage secondary control circuits through wires. The speed sensor is connected to the circuit breaker operating mechanism. The A-phase, B-phase, and C-phase on the mechanical characteristic tester are respectively connected to the upper contacts of the A-phase, B-phase, and C-phase of the circuit breaker through wires. The lower contacts of the A, B, and C phases of the circuit breaker are short-circuited and then connected to the common terminal on the mechanical characteristic tester through wires. The data processing and automatic test device is connected to the corresponding ports on the mechanical characteristic tester through wires to form a test circuit for testing the mechanical characteristics of the circuit breaker.

[0039] When the mechanical characteristic test system of the circuit breaker conducts a mechanical characteristic test on the circuit breaker, it is configured to perform the following steps: (1) Conduct a mechanical characteristic test after the circuit breaker is in the maintenance position and its internal energy is released.

[0040] (2) The mechanical characteristic tester device is first grounded through the automatic wire bundler, and the locking of other wiring locking electromagnets is automatically released by means of energized suction. Connect the closing, opening, locking, and energy storage secondary control circuits to the circuit breaker aviation plug, and ensure that the connector calibration device does not alarm.

[0041] (3) The data processing and automatic test device takes pictures of the circuit breaker's petal contacts and automatically identifies the burned traces and conductive paste coating conditions with one key. After all devices in the test system are connected and powered on, send a test command to the mechanical characteristic tester to complete one-key testing.

[0042] (4) After the test is completed, the data processing device reads the test data recorded by the mechanical characteristic tester, and selects the terminal-edge-cloud to further send the test data, circuit breaker petal contact photos, analysis and judgment, and return the analysis results, and upload them to the cloud for data aggregation.

[0043] In this embodiment, the aviation plug calibration device is set at the end of the secondary control circuit wiring for closing, opening, locking, and energy storage and is connected to the circuit breaker's aviation plug, which is used to verify whether the wiring is correct. Specifically, a digital barcode is added beside the socket of the aviation plug, and the data collector of the aviation plug calibration device identifies the digital barcode of the aviation plug. If there is an inconsistent recognition, an alarm signal is sent.

[0044] In this embodiment, the speed sensor is used to transmit the detected closing and opening signals of the circuit breaker to the sensor port on the mechanical characteristic tester.

[0045] In this embodiment, as Figure 2 shown, the automatic wire bundler mainly consists of four parts: a wire bundling frame, a spring, a housing, and a flat-shell wire. As Figure 3 shown, the flat-shell wire can be an in-built flat-shell wire with three-phase ABC line types, which can automatically organize, store, and stretch the wire. The automatic wire bundler is set at the position where wire connection is required. When the two devices need to be connected, the automatic wire bundler pulls out the wire for connection. For the secondary circuits of the opening circuit, closing circuit, locking circuit, energy storage circuit, and the circuits of the same-side wires of the contact connection, a single wire bundler can be shared respectively.

[0046] In this embodiment, the safety locking device is set on all the primary wiring except for the two sections of wiring of the mechanical characteristic tester's grounding point and the aviation plug. The locking electromagnet limits the stretching and retracting of the wire. When the mechanical characteristic tester is grounded and the zero potential to the ground is detected, the locking coil of the safety locking device is released. At this time, other wire bundlers can realize the function of retracting and releasing the wire. One end of the wire bundler is connected to the mechanical characteristic tester, and the other end is connected to the circuit after stretching the wire through the wire bundler. After the connection is completed, the wire body to be collected can be selected by pressing the button of the wire bundler, and it will automatically tighten to a fixed torque and then stop.

[0047] In this embodiment, the mechanical characteristic tester is used to connect or disconnect the corresponding functional terminal pairs according to the test items to be executed, and send a DC pulse signal corresponding to the test item to complete the mechanical characteristic test of the circuit breaker by controlling the opening and closing operations of the circuit breaker.

[0048] In this embodiment, the test data processing method is to adopt fine-grained partial offloading. A mechanical characteristic test data S is divided into n sub-test results, and the set of sub-test results is , and there is a dependency relationship between each sub-test result. A directed acyclic graph is used to represent the relationship between sub-tasks, as Figure 4 shown. represents the amount of transmitted data between two dependent sub-results and , and are adjacent nodes, is The preceding nodes can only execute the current node task when all the preceding node tasks are completed.

[0049] In this embodiment, the data processing and automatic test device includes a PCB board, a processor, a memory, a vision sensor, and a photoelectric sensor. The processor, the memory, the vision sensor, and the photoelectric sensor are all soldered on the PCB board. The processor adjusts the pulse of the mechanical characteristic tester through the photoelectric sensor to send a test instruction to the circuit breaker, completing a one-key test. The vision sensor takes a photo of the circuit breaker's petal contact, and then reads the test data recorded by the mechanical characteristic tester and the photo of the circuit breaker's petal contact into the memory. Finally, the processor calls the standard data in the memory and the imported data in the notepad memory, analyzes the test results, and uploads them to the cloud server for data aggregation.

[0050] In this embodiment, as Figure 5 shown, the data processing and automatic test device, the substation total system host, and the cloud server serve as the terminal, the edge side, and the cloud respectively, enabling data interaction. The data processing and automatic test device selects the terminal-edge-cloud to further send test data, analyze and judge, and return the analysis results. The data processing and automatic test device selecting the terminal-edge-cloud specifically includes: calculating the overhead of offloading test data from the terminal to the cloud, and weighing whether to process the test data in the substation itself or upload it to the cloud for processing according to the size of the overhead. The specific formula is as follows: 。

[0051] 。

[0052] 。

[0053] Among them, represents the offloading delay between the edge side and the cloud, represents the offloading energy consumption between the edge side and the cloud, represents the size of the input data in the cloud, represents the size of the response data after cloud computing, R represents the transmission rate from the edge side to the cloud node, represents the overhead of offloading data from the edge side to the cloud, and β represents the weight coefficient of the offloading delay.

[0054] In this embodiment, when the mechanical characteristic tests of circuit breakers are carried out in multiple intervals in the substation, the substation total system host receives the test data recorded by the mechanical characteristic tester for analysis and judgment, that is, edge side processing and analysis.

[0055] In this embodiment, when conducting mechanical characteristic tests on circuit breakers of multiple substations, the cloud server receives the test data recorded by the mechanical characteristic tester for analysis and judgment, and is also used to summarize the analysis results of terminal test data, edge - end test data, and cloud - end test data.

[0056] In this embodiment, as Figure 6 shown, the specific methods for the terminal, edge - end, and cloud - end to analyze test data: For a certain substation and its corresponding interval, input the original data of the circuit breaker, including "manufacturer", "equipment model", "opening time", "opening speed", "opening bounce time", "closing time", "closing speed", "closing bounce time", "phase - to - phase synchronization", "closing low - voltage jump percentage", "opening low - voltage jump percentage", "metal short - time", "close - open - close time". The mechanical characteristic test is carried out in the order of opening test, closing low - voltage jump, opening low - voltage jump, close - open test, closing test, close - open - close test, measure and record the test data, compare with the original data, and successively judge whether "manufacturer", "equipment model", "opening time", "opening speed", "opening bounce time", "closing time", "closing speed", "closing bounce time", "phase - to - phase synchronization", "closing low - voltage jump percentage", "opening low - voltage jump percentage", "metal short - time", "close - open - close time" are within the set value range. If there is test data that does not meet the requirements, output the data characters and data parameters that do not meet the set range. If all are qualified, output the character "Equipment test data is qualified".

[0057] The edge - end and the cloud - end record the manufacturer information and equipment standard parameters of each substation interval, compare with the test data at the terminal, and complete the independent data analysis function within the terminal - edge - cloud three - layer architecture. There is no need to record test data on - site, query manufacturer information, query corresponding equipment standard parameters, calculate and analyze. Just upload with one key to compare and analyze whether the test results are qualified, and synchronously transmit the corresponding manufacturer's guidance plan according to the abnormal data results, which is convenient for all types of personnel to complete standardized and complete maintenance steps and improve equipment reliability.

[0058] Combined with the above - mentioned embodiments, the following specific examples are proposed. It can be understood that the following specific examples only exemplarily elaborate on the specific implementation of the above - mentioned embodiments, and do not limit the technical solutions of the above - mentioned embodiments.

[0059] Based on MATLAB, set the test scenario in a square area of 120m×120m, distribute 9 substations and a cloud server, analyze the delay and energy consumption characteristics of the terminal - edge - cloud offloading strategy, the task is completely executed on the local terminal, the task is completely offloaded to the optimal edge - end for execution, the task is completely offloaded to the cloud for execution, and the distributed offloading strategy based on binary - coded genetic algorithm. The task processing accuracy rate can reach 100%. The test results of energy consumption and delay are as Figure 7as shown

[0060] 1. Considering the development requirements of the device, the amount of tasks to be processed is getting larger and larger. As can be seen from Figure 7 in (a), when the data task reaches 100, compared with the case where the task is completely executed on the local terminal, the task is completely offloaded to the optimal edge node for execution, the task is completely offloaded to the cloud for execution, and the distributed offloading strategy based on the binary-coded genetic algorithm, the energy consumption is reduced by nearly 30% on average.

[0061] 2. Considering the development requirements of the device, the amount of tasks to be processed is getting larger and larger. As can be seen from Figure 7 in (b), when the data task reaches 100, compared with the case where the task is completely executed locally, the task is completely offloaded to the optimal edge node for execution, the task is completely offloaded to the cloud for execution, and the distributed offloading strategy based on the binary-coded genetic algorithm, the delay can be reduced by up to 60%.

[0062] Although the present invention has been disclosed above by way of examples, it is not intended to limit the present invention. Any person skilled in the art within the technical field can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope defined in the claims.

Claims

1. A mechanical characteristic test system for multi-interval circuit breakers in a multi-variable substation, characterized in that, Including: A mechanical property tester, several safety locking devices, several automatic wire bundlers, speed sensors, closing, opening, locking, and energy storage secondary control circuits, a connector calibration device, a data processing and automatic testing device, a substation total system host, and a cloud server; The closing, opening, locking, and energy storage secondary control circuits are connected to the circuit breaker aviation plug. The ports of opening, closing, locking, energy storage, and common terminal on the mechanical property tester are connected to the corresponding ports of the closing, opening, locking, and energy storage secondary control circuits through wires. The speed sensor is connected to the circuit breaker operating mechanism. The A-phase, B-phase, and C-phase on the mechanical property tester are respectively connected to the upper contacts of the A-phase, B-phase, and C-phase of the circuit breaker through wires. The lower contacts of the A, B, and C phases of the circuit breaker are short-circuited and then connected to the common terminal on the mechanical property tester through wires. The data processing and automatic testing device is connected to the corresponding ports on the mechanical property tester through wires to form a test circuit for testing the mechanical properties of the circuit breaker; The connector calibration device is arranged at the end of the wiring of the closing, opening, locking, and energy storage secondary control circuits and is connected to the circuit breaker aviation plug for verifying whether the wiring is correct; The speed sensor is used to transmit the detected circuit breaker closing and opening signals to the sensor port on the mechanical property tester; The automatic wire bundler is arranged at the positions where wires need to be connected. When two devices need to be wired, the automatic wire bundler pulls out the wires for connection; The safety locking device is arranged on all primary wiring except for the grounding point of the mechanical property tester and the two-section wiring of the aviation plug. The locking electromagnet limits the telescoping of the wire; The data processing and automatic testing device is used to take pictures of the circuit breaker petal contacts and identify the burned traces and conductive paste coating conditions with one key. After all devices in the test system are connected and powered on, it issues a test command to the mechanical property tester to complete one-key testing. Subsequently, it reads the test data recorded by the mechanical property tester and selects the terminal-edge-cloud to further send the test data, analyze and judge, and return the analysis results, where the terminal, edge, and cloud are the data processing and automatic testing device, the substation total system host, and the cloud server respectively; The mechanical property tester is used to connect or disconnect the corresponding functional terminal pairs according to the test items to be executed and send DC pulse signals corresponding to the test items to complete the mechanical property test of the circuit breaker by controlling the opening and closing operations of the circuit breaker; The substation total system host is used to receive and analyze and judge the test data recorded by the mechanical property tester when the mechanical property tests of circuit breakers are carried out in multiple intervals in the substation; The cloud server is used to receive and analyze and judge the test data recorded by the mechanical property tester when the mechanical property tests of circuit breakers are carried out in multiple substations, and is also used to summarize the test data analysis results of the terminal, the test data analysis results of the edge, and the test data analysis results of the cloud; When the circuit breaker mechanical property test system conducts a mechanical property test on the circuit breaker, it is configured to perform the following steps: (1)The mechanical characteristic test is carried out after the circuit breaker is in the maintenance position and its internal energy is released. (2)The mechanical characteristic test instrument device is first grounded through the automatic wire bundler, automatically releases the locking of other wiring locking electromagnets through the energized suction method, connects the secondary control circuits of closing, opening, locking, and energy storage to the circuit breaker aviation plug, and ensures that the aviation plug calibration device does not alarm. (3)The data processing and automatic test device takes pictures of the circuit breaker's petal contacts and automatically identifies the burned traces and conductive paste coating conditions with one key. After all devices in the test system are connected and powered on, a test command is sent to the mechanical characteristic test instrument to complete the one-key test. (4)After the test is completed, the data processing device reads the test data recorded by the mechanical characteristic test instrument, and selects the terminal-edge-cloud to further send the test data, circuit breaker petal contact photos, analysis and judgment, and return the analysis results, and uploads them to the cloud for data aggregation.

2. The mechanical characteristic test system for multi - interval circuit breakers of a variable power station according to claim 1, wherein, The automatic wire bundler mainly consists of a wire bundling frame, a spring, a housing, and a flat shell wire, and can automatically organize, store, and stretch the wires.

3. The mechanical characteristic test system for multi-interval circuit breakers of a multi-variable power station according to claim 1, characterized in that, The data processing and automatic test device includes a PCB board, a processor, a memory, a vision sensor, and a photoelectric sensor. The processor, memory, vision sensor, and photoelectric sensor are all welded on the PCB board. The processor adjusts the pulse of the mechanical characteristic test instrument through the photoelectric sensor to send a pulse signal, and then sends a test command to the circuit breaker to complete the one-key test. The vision sensor takes pictures of the circuit breaker's petal contacts, then reads the test data recorded by the mechanical characteristic test instrument and the circuit breaker petal contact photos into the memory. Finally, the processor calls the standard data in the memory and the imported data in the notepad memory to analyze the test results and upload them to the cloud server for data aggregation.

4. The mechanical characteristic test system for multi - interval circuit breakers of a multi - variable substation according to claim 1, wherein, The data processing and automatic test device's selection of terminal-edge-cloud specifically includes: calculating the overhead of unloading the test data from the terminal to the cloud, and weighing whether to process the test data in the substation itself or upload it to the cloud for processing according to the size of the overhead. The specific formula is as follows: ； ； ； Among them, represents the offloading delay between the edge side and the cloud side, represents the offloading energy consumption between the edge side and the cloud side, represents the size of the input data at the cloud side, represents the size of the response data after cloud computing, and R represents the transmission rate from the edge side to the cloud node, represents the overhead of the edge side to offload data to the cloud side, and β represents the weight coefficient of the offloading delay.

5. A mechanical characteristic test system for a multi-interval circuit breaker of a multi-variable power station according to claim 1, characterized in that A digital barcode is added beside the socket of the aviation plug, and the data collector of the aviation plug calibration device identifies the digital barcode of the aviation plug. If there is an inconsistent identification situation, an alarm signal is sent.

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