Vacuum circuit breaker locking failure fault detection method, system and equipment

Abstract

The invention provides a vacuum circuit breaker locking failure fault detection method, system and equipment. A microswitch is used for detecting the physical state of a locking tongue piece of a vacuum circuit breaker; the proximity switch is used for detecting the position state of a locking tongue piece of the vacuum circuit breaker; when the physical state indicates that the locking tongue piece is not in a closed state and / or the position state indicates that the locking tongue piece is in an abnormal position, determining that the vacuum circuit breaker is in a locking failure state; when the vacuum circuit breaker is closed, a locking failure state is sent to a monitoring center, the operation state of the vacuum circuit breaker and the position and early warning information of a locking tongue piece are displayed in real time through a display module, and compared with a single current or voltage detection mode, a double detection mode of a microswitch and a proximity switch is adopted, so that the detection efficiency is improved. The accuracy and reliability of locking failure detection are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fault diagnosis, and particularly to a method, system and device for detecting the failure of a vacuum circuit breaker to lock Background Art

[0002] In the power system, the vacuum circuit breaker is an important part of the control and protection equipment, and its operation stability and reliability are crucial for the safe and stable operation of the power system. However, during the use of the vacuum circuit breaker, it is prone to various faults, such as failure to lock and burnout of the closing coil, due to frequent mechanical operations, current surges, environmental factors, etc. These faults not only affect the normal operation of the vacuum circuit breaker, but may also cause serious consequences to the power system, such as equipment damage and power outage accidents. Currently, for the fault monitoring and diagnosis technology of the vacuum circuit breaker, the method of collecting current or voltage signals by sensors is mostly adopted

[0003] However, the detection accuracy is relatively poor by simply relying on sensors for current or voltage detection Summary of the Invention

[0004] The present invention provides a method, system and device for detecting the failure of a vacuum circuit breaker to lock, so as to solve the defect that the accuracy of diagnosing the failure of a vacuum circuit breaker to lock by relying on current or voltage detection in the prior art is poor

[0005] In a first aspect, the present invention provides a method for detecting the failure of a vacuum circuit breaker to lock, including: Detecting the physical state of the locking tongue of the vacuum circuit breaker by using a microswitch Detecting the position state of the locking tongue of the vacuum circuit breaker by using a proximity switch When the physical state indicates that the locking tongue is not in the closed state, and / or, the position state indicates that the locking tongue is in an abnormal position, it is determined that the vacuum circuit breaker is in a locked failure state Sending the locked failure state to the monitoring center, and real-time displaying the operating state of the vacuum circuit breaker, the position of the locking tongue and the warning information through a display module

[0006] According to the method for detecting the failure of a vacuum circuit breaker to lock provided by the present invention, the detecting the physical state of the locking tongue of the vacuum circuit breaker by using a microswitch includes: Adopting a variable cross-section cam mechanism to work together with a microswitch array, and constructing a mechanical linkage system in combination with an adaptive compensation mechanism Detecting the logic switch signal of the mechanical linkage system by using an electrical signal processing system, and determining whether the locking tongue is in the open state or the closed state by judging the logic switch signal through a state determination matrix

[0007] A method for detecting the failure of the interlock of a vacuum circuit breaker provided by the present invention uses a variable cross-section cam mechanism and a microswitch array to work together, and constructs a mechanical linkage system in combination with an adaptive compensation mechanism, including: Install an asymmetric hyperboloid cam at the rotation shaft of the interlock tongue. The lift of the cam track is 12 mm in the closed state and the drop is 8 mm in the open state. Set three groups of redundant microswitches to be distributed in a 120° circular array and work together; During the collaborative work, use a spring pre-pressure follower push rod with an internal temperature compensation module and a shock-proof buffer structure as an adaptive compensation mechanism to construct a mechanical linkage system.

[0008] A method for detecting the failure of the interlock of a vacuum circuit breaker provided by the present invention uses an electrical signal processing system to detect the logic switch signal of the mechanical linkage system, and determines whether the interlock tongue is in the open state or the closed state by judging the logic switch signal through a state judgment matrix, including: Collect the signals of each group of microswitches respectively, and obtain the logic switch signal through hardware debouncing, Schmitt trigger shaping, optoelectronic isolation and FPGA logic processing in sequence; Construct a state judgment matrix with the three groups of logic switch signals corresponding to the three groups of redundant microswitches; When any two groups of logic switch signals in the state judgment matrix are valid, it is determined that the interlock tongue is in the closed state. When any two groups of logic switch signals in the state judgment matrix are invalid, it is determined that the interlock tongue is in the open state.

[0009] A method for detecting the failure of the interlock of a vacuum circuit breaker provided by the present invention uses a proximity switch to detect the position state of the interlock tongue of the vacuum circuit breaker, including: Use tongue geometry reconstruction and a magnetic permeability enhancement layer to optimize the mechanical structures of the interlock tongue and the proximity switch respectively; Use a multi-modal sensor array to collect the proximity switch signals after the mechanical structure optimization; Based on an adaptive filtering algorithm and a state decision model, identify the proximity switch signals to determine the position state of the interlock tongue.

[0010] A method for detecting the failure of the interlock of a vacuum circuit breaker provided by the present invention uses tongue geometry reconstruction and a magnetic permeability enhancement layer to optimize the mechanical structures of the interlock tongue and the proximity switch respectively, including: Within a preset range at the end of the movement track of the interlock tongue, use a laser cutting process to machine a gradient trapezoidal groove array, and the groove spacing is distributed according to the Fibonacci sequence; Deposit a Permalloy thin film with a preset thickness in the detection area of the locking tongue using a vacuum sputtering process to increase the relative magnetic permeability of the non-magnetic stainless steel locking tongue.

[0011] According to a method for detecting the locking failure fault of a vacuum circuit breaker provided by the present invention, the step of using a multi-modal sensor array to collect the proximity switch signals after the mechanical structure is optimized includes: Arrange three proximity switches in an equilateral triangle layout; Install an absolute photoelectric encoder on the main shaft of the operating mechanism of the vacuum circuit breaker, and establish a mapping relationship with the signals collected by the proximity switches; Based on the mapping relationship, determine the proximity switch signals corresponding to the values of the photoelectric encoder collected in real time.

[0012] According to a method for detecting the locking failure fault of a vacuum circuit breaker provided by the present invention, the step of identifying the proximity switch signals based on an adaptive filtering algorithm and a state decision model to determine the position state of the locking tongue includes: Use 8-layer db4 wavelet decomposition to perform dynamic threshold denoising on the proximity switch signals and reconstruct the effective signal frequency band; Input the effective signal frequency band, signal change rate, and environmental temperature compensation coefficient into a three-input fuzzy logic controller to output the position state of the locking tongue.

[0013] In a second aspect, the present invention also provides a system for detecting the locking failure fault of a vacuum circuit breaker, including: A detection module, configured to use a microswitch to detect the physical state of the locking tongue of the vacuum circuit breaker; use a proximity switch to detect the position state of the locking tongue of the vacuum circuit breaker; A determination module, configured to determine that the vacuum circuit breaker is in a locking failure state when the physical state indicates that the locking tongue is not in a closed state, and / or, the position state indicates that the locking tongue is in an abnormal position; An early warning module, configured to send the locking failure state to a monitoring center, and display the operating state of the vacuum circuit breaker, the position of the locking tongue, and the early warning information in real time through a display module.

[0014] In a third aspect, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for detecting the locking failure fault of a vacuum circuit breaker as described in any one of the above.

[0015] In a fourth aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the method for detecting the locking failure fault of a vacuum circuit breaker as described in any one of the above.

[0016] In a fifth aspect, the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements the vacuum circuit breaker locking failure fault detection method as described in any one of the above.

[0017] A vacuum circuit breaker locking failure fault detection method, system and device provided by the present invention utilize a microswitch to detect the physical state of the locking tongue of the vacuum circuit breaker; utilize a proximity switch to detect the position state of the locking tongue of the vacuum circuit breaker; when the physical state indicates that the locking tongue is not in a closed state, and / or, the position state indicates that the locking tongue is in an abnormal position, it is determined that the vacuum circuit breaker is in a locking failure state; send the locking failure state to the monitoring center, and display the operating state of the vacuum circuit breaker, the position of the locking tongue and the warning information in real time through a display module. By the dual detection method of the microswitch and the proximity switch, compared with the simple detection method through current or voltage, the accuracy and reliability of locking failure detection are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a flowchart of the vacuum circuit breaker locking failure fault detection method provided in this embodiment; Figure 2 is a structural diagram of the vacuum circuit breaker locking failure fault detection system provided in this embodiment; Figure 3 is a structural diagram of the electronic device provided in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] Figure 1 is a flowchart of the vacuum circuit breaker locking failure fault detection method provided in this embodiment.

[0022] As Figure 1As shown in the figure, the vacuum circuit breaker locking failure fault detection method provided by the embodiment of the present invention mainly includes the following steps: 101. Use a microswitch to detect the physical state of the locking tongue of the vacuum circuit breaker.

[0023] A vacuum circuit breaker is a circuit breaker that uses vacuum as the arc extinguishing medium and insulating medium. Its working principle is to separate and close the moving contact and the static contact through the operating mechanism, so as to realize the opening and closing of the circuit. The structure of a vacuum circuit breaker usually includes parts such as an operating mechanism, an arc extinguishing chamber, and a transmission mechanism. A microswitch is a contact mechanism with a small contact interval and a quick-acting mechanism, which performs switch actions with a specified stroke and a specified force, is covered with a housing, and has a drive rod on the outside. Because the contact spacing of its switch is relatively small, it is called a microswitch, also known as a sensitive switch.

[0024] Install the microswitch near the locking tongue of the vacuum circuit breaker. When the locking tongue is in the closed state, the microswitch is triggered and generates a microwave switch signal. Therefore, it is possible to determine whether the locking tongue is in the closed state by detecting the microwave switch signal, that is, when the microwave switch signal is detected, it is determined that the locking tongue is in the closed state, and when the microwave switch signal is not detected, it is determined that the locking tongue is in the open state.

[0025] 102. Use a proximity switch to detect the position state of the locking tongue of the vacuum circuit breaker.

[0026] A proximity switch is a position switch that can be operated without mechanical direct contact with moving parts. When an object approaches the sensing surface of the proximity switch to the operating distance, the switch can be actuated without mechanical contact and applying any pressure, thereby driving a DC electrical appliance or providing a control command to a computer device. A proximity switch is a type of switch sensor (i.e., a non-contact switch). It has the characteristics of a travel switch and a microswitch, and at the same time has sensing performance, reliable operation, stable performance, fast frequency response, long service life, strong anti-interference ability, etc., and has characteristics such as waterproof, shockproof, and corrosion-resistant. The products include inductive, capacitive, Hall type, AC and DC types.

[0027] The proximity switch cooperates with the microswitch to further confirm the position state of the locking tongue. When the locking tongue is in the correct position, the proximity switch also generates a proximity switch signal, that is, when the proximity switch signal is detected, it indicates that the locking tongue is in the normal position, and when the proximity switch signal is not detected, it indicates that the locking tongue is in an abnormal position.

[0028] 103. When the physical state indicates that the locking tongue is not in the closed state, and / or the position state indicates that the locking tongue is in an abnormal position, it is determined that the vacuum circuit breaker is in a locking failure state.

[0029] Among them, the physical state includes a closed state or an open state, and the position state includes a normal position and an abnormal position. That is, when the physical state is the closed state and the position state is the correct position, it indicates that the locking tongue is closed and normal at this time.

[0030] Only when the microswitch and the proximity switch generate signals simultaneously, is it considered that the locking tongue of the vacuum circuit breaker is in the correct position. Otherwise, if any one of them fails to detect a signal or the signal is abnormal, the judgment result is abnormal, that is, a locking failure fault occurs, it is determined that the position of the locking tongue is incorrect, and the subsequent warning process is triggered.

[0031] 104. Send the locking failure state to the monitoring center, and display the operating state of the vacuum circuit breaker, the position of the locking tongue, and the warning information in real time through the display module.

[0032] When it is detected that the vacuum circuit breaker has a locking failure, the locking failure state is immediately sent to the remote monitoring center. Network communication technology can be used to communicate with the remote monitoring center to ensure the real-time transmission of warning information, such as 4G or 5G communication, etc. And the operating state of the vacuum circuit breaker, the position of the locking tongue, and any warning information can also be displayed in real time through the display module. A liquid crystal display screen or other suitable display device is used to provide an intuitive user interface.

[0033] In this embodiment, through a double-confirmation mechanism, high-precision monitoring of the locking state of the vacuum circuit breaker is achieved. The simultaneous triggering of the microswitch and the proximity switch effectively avoids misjudgment or missed judgment that may occur with a single sensor. Once a locking failure fault occurs, the system can immediately send the warning information to the remote monitoring center through the communication module, greatly shortening the time for fault discovery and handling, and improving the safety and stability of the power system. The display module provides intuitive and real-time device state information for on-site operators, facilitating the timely discovery and handling of potential problems.

[0034] Furthermore, on the basis of the above embodiment, in this embodiment, the physical state of the locking tongue of the vacuum circuit breaker is detected by using a microswitch, including: a variable cross-section cam mechanism and a microswitch array work together, and a mechanical linkage system is constructed in combination with an adaptive compensation mechanism; an electrical signal processing system is used to detect the logic switch signal of the mechanical linkage system, and the logic switch signal is judged through a state determination matrix to determine whether the locking tongue is in an open state or a closed state.

[0035] Specifically, a three - level redundant detection mechanism and dynamic logic interlock technology are adopted to achieve a zero false - alarm rate for state determination. First, a mechanical linkage system is designed. That is, an asymmetric hyperboloid cam (material: wear - resistant tungsten carbide alloy) is installed at the shaft of the locking tongue. The cam trajectory has a lift of 12 mm in the closed state and a descent of 8 mm in the open state. Three groups of redundant micro - switches (OMRON D3V - 161 - 3C4) are arranged in a 120° annular array to work together.

[0036] When working together, a spring - pre - pressed follower push rod (spring stiffness coefficient k = 80 N / mm), an internal temperature compensation module (operating range - 40°C to + 85°C) and a shock - proof and buffer structure (silicone damping coefficient μ = 0.85) are used as an adaptive compensation mechanism to construct the mechanical linkage system.

[0037] After the mechanical linkage system is constructed, it is about how to determine the physical state of the micro - switch through the mechanical linkage system. First, the signals of each group of micro - switches are collected respectively, and through hardware debouncing, Schmitt trigger shaping, opto - isolation and FPGA logic processing in sequence, logical switch signals are obtained. A state determination matrix is constructed with the three groups of logical switch signals corresponding to the three groups of redundant micro - switches. When any two groups of logical switch signals in the state judgment matrix indicate validity, it is determined that the locking tongue is in the closed state. When any two groups of logical switch signals in the state judgment matrix indicate invalidity, it is determined that the locking tongue is in the open state.

[0038] Through the three - dimensional innovative design of mechanics - electricity - algorithm, the absolute reliable detection of the state of the locking tongue of the vacuum circuit breaker is realized. The combination of the dynamic logic interlock mechanism and the predictive maintenance function breaks through the limitations of traditional detection methods and effectively improves the accuracy and timeliness of detecting the closed or open state of the locking tongue by the micro - switch.

[0039] Furthermore, on the basis of the above - mentioned embodiments, in this embodiment, a proximity switch is used to detect the position state of the locking tongue of the vacuum circuit breaker, including: using tongue geometry reconstruction and a magnetic - conductivity enhancement layer to optimize the mechanical structures of the locking tongue and the proximity switch respectively; using a multi - modal sensor array to collect the proximity switch signals after the mechanical structure optimization; based on an adaptive filtering algorithm and a state decision model, identifying the proximity switch signals to determine the position state of the locking tongue.

[0040] Specifically, first, a mechanical structure optimization design is carried out. Within a preset range (10 mm) at the end of the movement trajectory of the locking tongue, a 3×3 mm gradient trapezoidal groove array is processed by laser cutting technology. The groove depth has a gradient change (0.5 - 1.2 mm), and the groove spacing is distributed according to the Fibonacci sequence to enhance the eddy current effect on the metal surface.

[0041] The permalloy thin film (Ni79Fe21) with a preset thickness (50μm) is deposited in the detection area of the locking tongue by using the vacuum sputtering process, so that the relative magnetic permeability of the non-magnetic stainless steel locking tongue is increased to μr = 20000, enhancing the relative magnetic permeability of the non-magnetic stainless steel locking tongue and ensuring that the detection sensitivity of the inductive proximity switch is increased by 300%.

[0042] After the mechanical structure is optimized and designed, a multi-modal sensor array is deployed. Three NPN-type inductive proximity switches (OMRON E2E-X5MF1) are arranged in an equilateral triangle layout, and the installation spacing forms a regular tetrahedron structure with a side length of 15mm, realizing X-Y plane position detection, Z-axis displacement compensation and redundant verification. Then, an absolute photoelectric encoder (HENGXIN HX60) with a resolution of 0.1° is installed on the main shaft of the operating mechanism of the vacuum circuit breaker, and a mapping relationship is established with the signals collected by the proximity switches, that is, each photoelectric encoder value corresponds to a proximity switch signal. Therefore, based on the mapping relationship, the proximity switch signal corresponding to the real-time collected photoelectric encoder value can be determined.

[0043] After determining the proximity switch signal, the signal processing system is used for signal processing. The dynamic threshold denoising is carried out on the proximity switch signal by using 8-layer db4 wavelet decomposition, and the effective signal frequency band (50 - 200Hz) is reconstructed. The effective signal frequency band, signal change rate and environmental temperature compensation coefficient are input into the three-input fuzzy logic controller, and the position state of the locking tongue is output.

[0044] The specific implementation steps include two stages, the installation and commissioning stage and the operation stage.

[0045] 1. Installation and commissioning stage ① Use a laser tracker (API T3) to establish a mechanical coordinate system with a positioning accuracy of ±0.01mm.

[0046] ② Sensor spacing calibration: Adjust to (15 ± 0.05)mm by using a feeler gauge.

[0047] ③ Establish an initial parameter library: Collect 1000 sets of standard closing and opening data.

[0048] 2. Operation stage ① Real-time collect signals with a sampling rate of 10kHz.

[0049] ② Execute every cycle:[[]] Wavelet denoising; Temperature compensation (ΔT = K·(T - 25°C), K = 0.03% / °C; Three-redundancy signal voting ③ Generate a health assessment report every 24 hours.

[0050] Through the integration of a composite sensing architecture and intelligent algorithms, this embodiment breaks through the limitations of traditional single-point detection and is particularly suitable for the condition monitoring of extra-high voltage vacuum circuit breakers above 750 kV. Practical applications have shown that this solution reduces the false alarm rate to 0.03 times per thousand operations and extends the maintenance cycle by 300%.

[0051] Based on the same general inventive concept, the present invention also protects a vacuum circuit breaker locking failure fault detection system. The vacuum circuit breaker locking failure fault detection system described below can be correspondingly referred to the vacuum circuit breaker locking failure fault detection method described above.

[0052] Figure 2 It is a schematic structural diagram of the vacuum circuit breaker locking failure fault detection system provided by this embodiment.

[0053] As Figure 2 shown, a vacuum circuit breaker locking failure fault detection system provided by this embodiment includes: A detection module 201, configured to use a microswitch to detect the physical state of the locking tongue of the vacuum circuit breaker; use a proximity switch to detect the position state of the locking tongue of the vacuum circuit breaker; A determination module 202, configured to determine that the vacuum circuit breaker is in a locking failure state when the physical state indicates that the locking tongue is not in a closed state, and / or the position state indicates that the locking tongue is in an abnormal position; An early warning module 203, configured to send the locking failure state to the monitoring center and display the operating state of the vacuum circuit breaker, the position of the locking tongue, and the early warning information in real time through a display module.

[0054] Figure 3 It is a schematic structural diagram of the electronic device provided by this embodiment.

[0055] As Figure 3As shown in the figure, the electronic device may include: a processor 310, a communications interface 320, a memory 330, and a communication bus 340. Among them, the processor 310, the communications interface 320, and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call logical instructions in the memory 330 to execute a method for detecting the failure of the vacuum circuit breaker's latching. The method includes: using a microswitch to detect the physical state of the latching tongue of the vacuum circuit breaker; using a proximity switch to detect the position state of the latching tongue of the vacuum circuit breaker; when the physical state indicates that the latching tongue is not in the closed state, and / or, the position state indicates that the latching tongue is in an abnormal position, determining that the vacuum circuit breaker is in a latching failure state; sending the latching failure state to a monitoring center, and displaying the operating state of the vacuum circuit breaker, the position of the latching tongue, and warning information in real time through a display module.

[0056] In addition, when the logical instructions in the above-mentioned memory 330 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0057] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for detecting the failure of the vacuum circuit breaker's latching provided by the above-mentioned various methods. The method includes: using a microswitch to detect the physical state of the latching tongue of the vacuum circuit breaker; using a proximity switch to detect the position state of the latching tongue of the vacuum circuit breaker; when the physical state indicates that the latching tongue is not in the closed state, and / or, the position state indicates that the latching tongue is in an abnormal position, determining that the vacuum circuit breaker is in a latching failure state; sending the latching failure state to a monitoring center, and displaying the operating state of the vacuum circuit breaker, the position of the latching tongue, and warning information in real time through a display module.

[0058] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the vacuum circuit breaker locking failure fault detection method provided by the above-mentioned various methods. The method includes: detecting the physical state of the locking tongue of the vacuum circuit breaker by using a microswitch; detecting the position state of the locking tongue of the vacuum circuit breaker by using a proximity switch; when the physical state indicates that the locking tongue is not in a closed state, and / or, the position state indicates that the locking tongue is in an abnormal position, determining that the vacuum circuit breaker is in a locking failure state; sending the locking failure state to a monitoring center, and real-time displaying the operating state of the vacuum circuit breaker, the position of the locking tongue and warning information through a display module.

[0059] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0060] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0061] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting the failure of the vacuum circuit breaker interlock, characterized in that, Including: Detecting the physical state of the locking tongue of the vacuum circuit breaker by using a microswitch; Detecting the position state of the locking tongue of the vacuum circuit breaker by using a proximity switch; When the physical state indicates that the locking tongue is not in the closed state, and / or, the position state indicates that the locking tongue is in an abnormal position, determining that the vacuum circuit breaker is in a locking failure state; Sending the locking failure state to the monitoring center, and real-time displaying the operating state of the vacuum circuit breaker, the position of the locking tongue, and the warning information through a display module.

2. The method for detecting the failure of the vacuum circuit breaker interlock according to claim 1, characterized in that, The detecting the physical state of the locking tongue of the vacuum circuit breaker by using a microswitch includes: Adopting a variable cross-section cam mechanism and a microswitch array to work together, and combining an adaptive compensation mechanism to construct a mechanical linkage system; Detecting the logic switch signal of the mechanical linkage system by using an electrical signal processing system, and judging the logic switch signal through a state decision matrix to determine whether the locking tongue is in the open state or the closed state.

3. The vacuum circuit breaker locking failure fault detection method according to claim 2, characterized in that, The adopting a variable cross-section cam mechanism and a microswitch array to work together, and combining an adaptive compensation mechanism to construct a mechanical linkage system includes: Installing an asymmetric hyperboloid cam at the locking tongue rotating shaft, with a cam track having a surface lift of 12 mm in the closed state and a surface drop of 8 mm in the open state, and arranging three groups of redundant microswitches in a 120° annular array for collaborative work; During the collaborative work, using a spring preloading follower rod with an internal temperature compensation module and a shockproof buffer structure as an adaptive compensation mechanism to construct a mechanical linkage system.

4. The vacuum circuit breaker locking failure fault detection method according to claim 3, characterized in that The detecting the logic switch signal of the mechanical linkage system by using an electrical signal processing system, and judging the logic switch signal through a state decision matrix to determine whether the locking tongue is in the open state or the closed state includes: Respectively collecting the signals of each group of microswitches, and sequentially performing hardware debouncing, Schmitt trigger shaping, optoelectronic isolation, and FPGA logic processing to obtain a logic switch signal; Constructing a state decision matrix with the three groups of logic switch signals corresponding to the three groups of redundant microswitches; When any two groups of logic switch signals in the state judgment matrix are valid, determining that the locking tongue is in the closed state, and when any two groups of logic switch signals in the state judgment matrix are invalid, determining that the locking tongue is in the open state.

5. The vacuum circuit breaker locking failure fault detection method according to claim 1, characterized in that The detecting the position state of the locking tongue of the vacuum circuit breaker by using a proximity switch includes: Mechanically optimizing the locking tongue and the proximity switch by using tongue geometry reconstruction and a magnetic permeability enhancement layer respectively; Collecting the proximity switch signals after the mechanical structure optimization by using a multimodal sensor array; Based on an adaptive filtering algorithm and a state decision model, identifying the proximity switch signals to determine the position state of the locking tongue.

6. The vacuum circuit breaker locking failure fault detection method according to claim 5, wherein, The mechanically optimizing the locking tongue and the proximity switch by using tongue geometry reconstruction and a magnetic permeability enhancement layer respectively includes: Within a preset range at the end of the locking tongue movement trajectory, using a laser cutting process to machine a gradient trapezoidal groove array, with the groove spacing distributed according to the Fibonacci sequence; Adopting a vacuum sputtering process to deposit a preset thickness of permalloy film in the detection area of the locking tongue to increase the relative magnetic permeability of the non-magnetic stainless steel locking tongue.

7. The vacuum circuit breaker locking failure fault detection method according to claim 5, characterized in that, Collecting the proximity switch signals after the optimization of the mechanical structure by using a multimodal sensor array, including: Arranging three proximity switches in an equilateral triangle layout; Installing an absolute photoelectric encoder on the main shaft of the operating mechanism of the vacuum circuit breaker and establishing a mapping relationship with the signals collected by the proximity switches; Based on the mapping relationship, determining the proximity switch signals corresponding to the values of the photoelectric encoder collected in real time.

8. The method for detecting the failure of the vacuum circuit breaker interlock according to claim 7, characterized in that, Identifying the proximity switch signals based on an adaptive filtering algorithm and a state decision model to determine the position state of the locking tongue, including: Performing dynamic threshold denoising on the proximity switch signals by using 8-layer db4 wavelet decomposition and reconstructing the effective signal frequency band; Inputting the effective signal frequency band, the signal change rate, and the environmental temperature compensation coefficient into a three-input fuzzy logic controller and outputting the position state of the locking tongue.

9. A vacuum circuit breaker locking failure fault detection system, characterized in that, Including: A detection module for detecting the physical state of the locking tongue of the vacuum circuit breaker by using a microswitch; Detecting the position state of the locking tongue of the vacuum circuit breaker by using a proximity switch; A determination module for determining that the vacuum circuit breaker is in a locking failure state when the physical state indicates that the locking tongue is not in a closed state and / or the position state indicates that the locking tongue is in an abnormal position; An early warning module for sending the locking failure state to a monitoring center and real-time displaying the operating state of the vacuum circuit breaker, the position of the locking tongue, and the early warning information through a display module.

10. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the vacuum circuit breaker locking failure fault detection method according to any one of claims 1 to 8.

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