2109 results about "Disconnector" patented technology

The invention discloses a GIS disconnecting switch multi-state intelligent sensing system, and relates to the field of GIS disconnecting switch state monitoring. A self-calibration multi-mode sensor is deployed for multi-source data acquisition, and novel sensors including terahertz imaging and the like are included; in data preprocessing, deep learning noise reduction is applied, fuzzy entropy is used for dynamic weighted fusion, and abnormal values are processed by an improved algorithm; feature extraction is combined with a plurality of frontier algorithms to process vibration signals, and CRNN is used to analyze acoustic signals; the QPSO evidence theory is adopted for state fusion perception, the node relation is learned by means of GNN, and the weight is adjusted according to the information gain rate; state assessment and early warning are based on transfer learning, GAN and LSTM-attention mechanisms, and early warning priorities are ranked by FAHP. According to the invention, multi-mode accurate acquisition, intelligent data processing, deep feature mining, innovative fusion perception, accurate evaluation and early warning and efficient fault diagnosis and positioning are realized, the state of the GIS isolation switch can be comprehensively and accurately perceived, the system is self-learned and optimized, the equipment safety is guaranteed, the risk of a power system is reduced, and the power operation and maintenance benefits are improved.

The utility model belongs to the technical field of medium-voltage power distribution systems, and discloses an isolating switch device and a switch cabinet, the isolating switch device comprises an insulating rod, a conductive block, a conductive sheet and an operating mechanism, the conductive block is sleeved on the insulating rod, the conductive sheet is fixedly connected with the conductive block, and the operating mechanism drives the conductive sheet and the conductive block to rotate through the insulating rod. Therefore, the conducting strip is selectively connected or disconnected with the circuit breaker connector bar, and the conducting block is electrically connected with the voltage transformer in the rotating process. An isolating switch device is additionally arranged between a circuit breaker and a voltage transformer in a switch cabinet, an operating mechanism is utilized to drive a conducting strip and a conducting block to rotate through an insulating rod, the conducting block and the voltage transformer keep electrical connection in the rotating process, the position of the conducting strip is changed in the rotating process, and then the conducting strip is selectively connected with or disconnected from a circuit breaker connector bar. The structure is simplified, the number of elements is reduced, flexible operation can be achieved, and the stability and reliability of the disconnecting switch device can be guaranteed.

The invention relates to the technical field of power electronic devices, in particular to a low-voltage direct-current circuit breaker, a fault protection method and a related device.The low-voltage direct-current circuit breaker comprises a through-flow branch, a transfer branch and an energy consumption branch which are connected in sequence; the through-current branch comprises an isolating switch and an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) commutation switch which are connected in series; the transfer branch comprises a first power electronic switch group and a buffer branch which are connected in parallel; the energy consumption branch comprises a first metal oxide MOV, a second metal oxide MOV and a second power electronic switch group; the first metal oxide MOV is connected in parallel with the second power electronic switch group; and the second metal oxide MOV is respectively connected with the first metal oxide MOV and the second power electronic switch group. The technical problems that an existing hybrid direct current circuit breaker is not suitable for a low-voltage direct current system and the loss is high in the turn-off process are solved.

The embodiment of the invention provides a method and device for predicting the health state of a high-voltage isolation switch, a medium and a product, and is applied to the technical field of information. The method comprises the steps of obtaining current data generated by a high-voltage isolation switch in a preset time period, and performing data processing on the current data to obtain a measurement action current parameter; when the measured action current parameter is higher than the preset action current parameter, inputting the measured action current parameter into a pre-trained mapping relation model to obtain a predicted oxide film thickness and a predicted resistance value corresponding to the contact surface of the moving and static contacts of the high-voltage isolation switch; and based on the rated working parameters, the operation time, the predicted oxide film thickness and the predicted resistance value of the high-voltage isolation switch, calculating the residual life and the failure probability corresponding to the high-voltage isolation switch, and performing health state evaluation on the high-voltage isolation switch to obtain a health index corresponding to the high-voltage isolation switch. The technical effect of improving the maintenance efficiency of the high-voltage isolation switch is achieved.

An electrical transmission safety system for connection of direct current (DC) power from a DC power source to a load comprises: a connection from the power source to the load, the connection comprising a positive terminal and a negative terminal; a first solid state switch electrically connected between the power source and one of the positive terminal and negative terminal; and a switch-control isolation block comprising a first optocoupler, the first optocoupler providing electrical isolation from the power source for generating a first isolated switch-control signal in response to a switch-control input signal, the switch-control isolation block connected to provide the first isolated switch-control signal to the first solid state switch to thereby control an ON or OFF conduction state of the first solid state switch and corresponding current flow between the power source and the load through the one of the positive terminal and negative terminal.

The invention belongs to the technical field of electromechanical engineering and power transmission and transformation, and particularly relates to a multi-loop gas insulation power pipe gallery, a power transmission system and a control method. The multi-loop gas insulation electric power pipe gallery comprises a controller and a pipe gallery main body. The pipe gallery main body comprises a pipe gallery outer wall, two bus bars installed in the pipe gallery outer wall, a plurality of connecting buses, a standby pipeline bus and a plurality of single-phase pipeline buses. The standby pipeline bus, the two bus bars and the gas insulation pipeline bus assemblies are fixedly installed in the outer wall of the pipe gallery through fixing structures. The standby pipeline bus is connected between the two bus bars; the single-phase pipeline bus comprises a first connecting section, a first main body section and a second connecting section which are sequentially arranged along the axial direction; the two ends of each first main body section are respectively connected with the two bus bars through a connecting bus bar, the two ends of each first main body section are respectively provided with an isolating switch, and each connecting bus bar is provided with an isolating switch; and the controller is used for controlling the on-off of each isolating switch.

The invention relates to a power failure and transmission operation safety locking system and method, and the system and method achieve the precise locking management of an isolation switch device through the integration of SCADA real-time data, a dynamic locking counter mechanism and multiple safety verification. The system generates a unique job command number based on a Hash algorithm, dynamically renders a locking range in combination with a visual interface, and supports a multi-task superposition locking and priority strategy. Through triple protection of checking the state of the disconnecting switch equipment during plate hanging, checking the operation number during plate removing and forcibly removing the whole plate before power transmission, the problems of misoperation and electrified risks in traditional power failure and power transmission operation are solved, and the power supply dispatching safety is remarkably improved.

The invention discloses a temperature field simulation method, device and equipment for an outdoor high-voltage isolation switch and a storage medium, belongs to the technical field of power transmission and transformation, and solves the problems that a calculation result is disjointed from an actual operation and maintenance environment and the application range is narrow due to the adoption of an existing power equipment temperature distribution method. The invention discloses a temperature field simulation method for an outdoor high-voltage isolating switch. The method comprises the following steps: establishing a multi-physical field coupling finite element model according to a geometric structure, air material parameters and rated current of a target outdoor high-voltage isolating switch; and calculating a three-dimensional temperature field of the target outdoor high-voltage isolation switch according with an actual operation state based on the multi-physics field coupling finite element model by taking a variable field distribution value meeting a convergence condition under a pre-calculated forced wind speed as an initial condition and combining the boundary condition. According to the invention, the real position and the temperature rise amplitude of the internal hot spot of the outdoor high-voltage isolation switch can be directly quantified, the result is more accurate and reliable, and misjudgment caused by environmental interference is not easy to occur.

A device (200) for controlling a lock (102) of a vehicle flap (105) is described. The device (200) comprises an operating element (106) which can be actuated by a user in order to close a circuit and to thereby cause the lock (102) of the vehicle flap (105) to open. The device (200) further comprises a disconnector (204) which is designed to prevent closing of the circuit by the operating element (106) when a vehicle door (108) of the vehicle (100) is closed, and to allow closing of the circuit by the operating element (106) when the vehicle door (108) of the vehicle (100) is open.

The utility model relates to the technical field of outdoor high-voltage vacuum circuit breakers, and discloses an outdoor high-voltage vacuum circuit breaker with an isolating switch, the top of a base is fixedly connected with a circuit breaker body, the middle part of the front side of the base is fixedly connected with a fixed shell, and the two sides of the fixed shell are fixedly connected with electric push rods. A clamping plate is fixedly connected to one side of the electric push rod, a connecting base is fixedly connected to the middle of the front side of the circuit breaker body, a winding roller is rotatably connected to the interior of the connecting base, an electric wire is arranged on the winding roller, and an isolating switch is fixedly connected to the bottom of the electric wire; a servo motor, a winding roller, an electric wire and the like are arranged to be matched with the disconnecting switch for use, the servo motor drives the winding roller to rotate so as to unwind the electric wire, the electric wire drives the disconnecting switch to move downwards so as to move to the position below the circuit breaker body, and therefore the danger of electric shock caused by an operator in the using process can be prevented; and a response can be conveniently and quickly made in an emergency.

The utility model discloses a confluence cabinet, which comprises a confluence cabinet body and a protection assembly, a first input copper bar group, a first output copper bar group, a second input copper bar group, a second output copper bar group and an isolating switch are arranged in the confluence cabinet body, and the first input copper bar group and the first output copper bar group are correspondingly arranged on two sides of the isolating switch along a first direction. And the switch is electrically connected with the isolating switch. And the second input copper bar group and the second output copper bar group are correspondingly arranged on two sides of the isolating switch along the first direction and are electrically connected with the isolating switch. And the first input copper bar group and the second input copper bar group are arranged at intervals along the second direction. And the isolating switch has a switch-on state and a switch-off state and is used for isolating the confluence cabinet from a power utilization system. The protection assembly comprises direct current fuses which are respectively arranged in the first input copper bar group and the second input copper bar group and are used for protecting circuits and equipment from being damaged by overcurrent, so that the safety and the reliability of the system are improved.

The utility model is suitable for the field of photovoltaic technology, and especially relates to a photovoltaic confluence cabinet and a photovoltaic system. The photovoltaic confluence cabinet comprises a cabinet body and a plurality of branch loops, the cabinet body accommodates the branch loops, and the branch loops are arranged on at least one side of the cabinet body; each branch loop comprises an isolating switch, a fuse, a busbar and a frame circuit breaker; wherein the lower port of the isolating switch is connected with an external cable through a first wiring busbar, the upper port of the isolating switch is connected with the lower port of the fuse through a first branch bar, the upper port of the fuse is connected with the busbar through a second branch bar, the lower port of the frame circuit breaker is connected with the busbar, and the upper port of the frame circuit breaker is connected with the busbar. And the upper port of the frame circuit breaker is connected with external equipment through a second wiring busbar. According to the utility model, through the arrangement of the busbar, the layout of the branch loop is more compact, and the size and volume of the photovoltaic confluence cabinet are reduced.

This application provides a power conversion apparatus and an insulation impedance detection method. The insulation impedance detection circuit is connected to the direct current bus and the ground, and the isolation switch is connected to the insulation impedance detection circuit and the alternating current voltage detection circuit. The controller is configured to control the isolation switch to be turned on, and control the insulation impedance detection circuit to detect a voltage between the direct current bus and the ground, to obtain an insulation impedance based on the voltage. The controller is further configured to control the isolation switch to be turned off before controlling the insulation impedance detection circuit to detect the voltage, to protect a person from suffering an electric shock and hand numbness due to touching the output end of the inverter circuit.

The invention discloses a modeling method and system for a vehicle network field circuit coupling model under a contact line short-circuit working condition, and relates to the technical field of modeling, and the method comprises the following steps: constructing a short-circuit arc equivalent model under the contact line short-circuit working condition based on an isolation switch equivalent model, one end of the short-circuit arc equivalent model is connected with a contact line in sliding connection with a pantograph in the chain type lumped tau-shaped network model through a switch element, the other end of the short-circuit arc equivalent model is connected with a steel rail in the chain type lumped tau-shaped network model, and a vehicle network circuit model under the contact line short-circuit working condition is obtained; and taking the short-circuit arc current at any short-circuit phase obtained through simulation of the vehicle network circuit model as a current excitation source of the three-dimensional model, and obtaining a vehicle network field model under the contact line short-circuit working condition. The rise rate, peak value and attenuation process of the short-circuit current can be accurately simulated by adding the short-circuit arc, the arc voltage drop is reflected, and the authenticity and practicability of simulation are remarkably improved.

The modular fully enclosed insulated switchgear provided in this application relates to the field of electrical switchgear. The modular fully enclosed insulated switchgear comprises: a main air chamber module, an operating mechanism module, a plug-in solid insulated busbar module, a three-position disconnector, a metal box, a transmission device and a solid insulated inner cone plug interface; wherein, the plug-in solid insulated busbar module comprises a plurality of fully solid insulated U-shaped conductors, both ends of the U-shaped conductor are provided with solid insulated outer cone plug connectors, the solid insulated outer cone plug connector at one end of the U-shaped conductor is used to connect to the solid insulated inner cone plug interface of the modular fully enclosed insulated switchgear, and the solid insulated outer cone plug connector at the other end is used to connect to the solid insulated inner cone plug interface of the adjacent modular fully enclosed insulated switchgear. It is used to solve the technical problems in the prior art that the switchgear is difficult to install and disassemble independently, is not conducive to transportation and installation in a small space, and is particularly difficult to maintain due to faults.

The invention relates to a 35kV armored metal alternating-current switch equipment mechanism door closing operation interlocking mechanism which comprises a sliding plate vertically connected to the rear portion of an operation mechanism panel in a sliding mode and a mechanism door baffle fixedly connected to a mechanism door, the sliding plate is provided with a sliding plate hole matched with an operation shaft hole in the operation mechanism panel, and the lower end of the sliding plate is fixedly connected with an ejector rod. The lower end of the ejector rod is provided with a roller, the mechanism door baffle is provided with an inclined plane, and when the mechanism door is closed, the roller and the sliding plate are pushed to move upwards through the inclined plane of the mechanism door baffle, so that the sliding plate hole in the sliding plate is aligned with the operation shaft hole. And the disconnecting switch cannot be operated in an on state. The interlocking mechanism meets the'five-prevention 'technical requirement of electricity safety, has no intermediate switching factor, belongs to a pure mechanical interlocking mechanism, thoroughly solves the problem that a traditional switch cabinet mechanism door has no door closing operation, is simple and labor-saving in operation, and is safer in electricity utilization.

The invention provides an isolating switch performance monitoring system, which comprises a data acquisition module which at least comprises a current sensor and a signal conditioning circuit and is used for acquiring action current signals of a driving motor in an isolating switch in real time; the data processing module is used for performing filtering, noise reduction and time domain and frequency domain feature extraction on the received action current signal of the driving motor and establishing a corresponding waveform database according to the extracted features, and the waveform database at least comprises a normal waveform database and an abnormal waveform database; and the state evaluation module is used for comparing the real-time waveform with the reference waveform in the waveform database through a preset algorithm, identifying abnormal feature points existing in the real-time waveform and generating a corresponding performance evaluation result. Precise evaluation of the performance of the isolating switch is realized based on the current waveform of the driving motor.

The utility model provides an anti-impact connecting bolt fastening structure of a high-voltage isolating switch, and relates to the technical field of high-voltage switches, the anti-impact connecting bolt fastening structure comprises a high-voltage isolating switch base and a switch anti-impact bolt connecting assembly, through bolts penetrate through the inner sides of base bolt holes, the lower side of a bolt head rubber mat is provided with a back shore spring, and the back shore spring is connected with the switch anti-impact bolt connecting assembly. A limiting sleeve is connected to the outer side of the jacking spring in a sleeving mode, a nut rubber mat is arranged on the lower side of the limiting sleeve, a connecting nut is arranged on the lower side of the nut rubber mat, a metal locking nut is arranged on the lower side of the connecting nut, and due to the effective buffering effect of a damping rubber mat, damage of vibration to the base is remarkably reduced, and the service life of equipment is prolonged; and through rotation of the penetrating bolt, rapid mounting and dismounting can be achieved, firm and reliable connection is ensured, and through adjustment of the fastening strength of the penetrating bolt, impact loads under different working conditions can be flexibly coped with, and stable operation of equipment is ensured.

The invention discloses a super-fusion pole-mounted switch device, belongs to the technical field of switch devices, and discloses the super-fusion pole-mounted switch device which comprises a switch body, a power taking unit and a feeder terminal. The switch body comprises a deep fusion solid-sealed polar pole which is integrally poured, a vacuum arc extinguish chamber, an isolating switch contact and a voltage and current sensor are integrated in the switch body, and the electricity taking unit supplies power to the deep fusion solid-sealed polar pole through a separable spring electric contact structure; the feeder terminal is embedded in the switch box body and is operated in a hot-line mode through a special operating rod. The invention further provides a transient electromagnetic interference suppression module which is used for eliminating electromagnetic interference in the equipment. The CLC topological power taking unit can adapt to multiple working conditions; the state monitoring module is fused with multi-source data to diagnose faults, and the problems that an existing primary and secondary fusion column switch is low in fusion degree, weak in anti-electromagnetic interference, poor in electricity taking reliability and low in intelligence are solved. The equipment can supply power to the 10kV power distribution network intelligently, the reliability is improved, and the operation and maintenance cost is reduced.

The invention relates to the technical field of intelligent monitoring of power equipment, in particular to a dynamic digital twin modeling method, device and equipment for an isolating switch and a storage medium. The invention provides a method for realizing a digital twin model of an isolating switch by accurately acquiring electrical parameters and structural parameters of the isolating switch, constructing a static model and establishing an opening and closing motion equation. By designing normal and abnormal working condition test scenes, obtaining simulation test data and comparing the simulation test data with actual sampling data, the model precision can be continuously optimized, the state monitoring and early warning capability of the isolation switch is improved, and technical support is provided for intelligent operation and maintenance of a power system.

The invention relates to a fuse and electric equipment. The fuse comprises a shell, an electric connection unit, an action unit and an excitation unit. The shell is provided with a first cavity and a second cavity, and a communicating hole is formed in the cavity wall of the first cavity so that the first cavity can communicate with the second cavity. The electric connection unit is mounted on the shell and comprises a connection bar and a melt which are connected in parallel; the action unit comprises a first breaker movably installed in the first chamber and a second breaker movably installed in the second chamber. The excitation unit is mounted on the shell; wherein the excitation unit is used for driving the first disjunction device to disconnect the connecting bar, and is also used for driving the second disjunction device to disconnect the melt after the first disjunction device disconnects the connecting bar; and when the first breaking device does not cut off the connecting row, the first breaking device blocks the communicating hole. The invention aims to provide the fuse with the arc extinguishing capability and the breaking capability.

The invention discloses an isolating switch operating mechanism with a quick tripping function and an operating method thereof, and relates to the technical field of isolating switches. The isolating switch operating mechanism with the quick tripping function comprises a shell, a connecting rod mechanism and a handle shaft assembly, and the handle shaft assembly is configured to transmit rotating force of an operating handle to the connecting rod mechanism. According to the disconnecting switch operating mechanism with the quick tripping function and the operating method thereof, the rotating force of the operating handle is transmitted to the connecting rod mechanism by arranging the handle shaft assembly, so that the connecting rod mechanism drives the switch body to be switched off or switched on, and the requirement of a rotating operation mode of the disconnecting switch can be met; and the lock catch of the connecting rod mechanism is buckled with the jump pin.

The invention provides a device and a method for testing the corrosion resistance of a silver coating of a high-voltage isolating switch in a coastal electromagnetic environment. The device comprises a salt mist box connected with a power supply, an electric field generator, a magnetic field generator, a camera, a PLC (Programmable Logic Controller) control module and an acquisition and analysis module, the PLC control module is used for collecting environmental data and images shot by the camera, and regulating and controlling the salt mist box, the electric field generator and the magnetic field generator to simulate industrial atmosphere in a coastal electromagnetic environment based on the environmental data; and the acquisition and analysis module is used for analyzing the environmental data and images acquired by the PLC control module to obtain the corrosion resistance grade of the electrical contact sample. The device can simulate salt mist concentration, temperature and humidity, pollutants and an electromagnetic field during operation of high-voltage equipment in the coastal industrial atmospheric environment, comprehensively reproduce the actual service environment of the silver coating of the electrical contact of the high-voltage isolating switch, simulate the actual operation condition, evaluate the corrosion resistance of the silver coating of the electrical contact under the complex environmental condition, and improve the service life of the electrical contact. And linkage adjustment of multiple test parameters can be realized.

The invention relates to the technical field of automatic assembly, in particular to automatic assembly equipment for isolating switch base bolts, which comprises a base, a mounting device, a transportation assembly and at least two screwing assemblies, screwing stations and mounting stations are arranged on the surface of the base at intervals, and the transportation assembly is connected to the surface of the base. The at least two screwing assemblies are connected to the surface, facing the screwing station, of the base at intervals, the at least two screwing assemblies are located on the two sides of the shell in the length direction, the screwing assemblies can sequentially screw and fix the multiple bolts into the threaded holes, and the mounting device is connected to the surface, facing the mounting station, of the base. And a plurality of bolts can be embedded into the mounting holes by the mounting device. Through the arrangement of the mounting device and the screwing assembly, full-automatic assembly of the bolts on the shell is completed, manual assembly of workers is not needed, the assembly efficiency of the bolts of the isolation switch base is improved, the assembly period of the isolation switch base is shortened, and therefore the assembly cost of the isolation switch base is reduced.

The invention discloses an isolating switch dynamic arc simulation method considering contact action and a related system thereof, and belongs to the technical field of high-voltage electrical equipment simulation. Firstly, a three-dimensional geometric model of the disconnecting switch is constructed according to actual size parameters, then the three-dimensional geometric model is imported into simulation software, movement of a movable arc striking contact is simulated, and a medium strength recovery curve is obtained. And then constructing an electromagnetic simulation circuit considering arc reignition, simulating a dynamic arcing process, and obtaining a voltage difference and a current at two ends of the isolation switch. The arc extinguishing or arcing state is judged by combining the voltage difference, the current and the medium strength recovery curve, and the electromagnetic simulation circuit is controlled according to the arc extinguishing or arcing state, so that closed-loop simulation of the arcing-arc extinguishing alternating state of the disconnecting switch is realized. According to the method, the contact motion characteristics and the arc physical process are innovatively coupled, the problem of simulation errors caused by the adoption of a simplified medium strength curve in a traditional method is solved, the isolation switch operation transient overvoltage characteristics can be accurately predicted, and a reliable analysis means is provided for insulation design of extra-high voltage equipment.

The application discloses a circuit breaker and isolating switch linkage device for pole-mounted circuit breaker, wherein a main shaft rotates, and an insulating pull rod assembly is driven to move through a main shaft crank; a shift fork block in the insulating pull rod assembly pushes an isolating pin shaft in an isolating transmission assembly to move, and an isolating switch contact is driven to move through an isolating connecting rod and an isolating clamp; when an isolating limiting crank arm contacts a support, the isolating switch is closed to a position, the shift fork block is disengaged from the isolating pin shaft, and the isolating transmission assembly is no longer pushed. Through the connection relationship among the main shaft assembly, the insulating pull rod assembly, the isolating transmission assembly and a circuit breaker transmission assembly, the linkage of the circuit breaker and the isolating switch and the required action time interval of normal operation are realized, and the influence of the electric force of the isolating switch contact on the action of the circuit breaker is avoided. The application has the advantages of simple structure, small size, small number of components, high reliability and long service life.

The utility model discloses a mechanical lock interlocking system for a grounding switch of a gas insulated switchgear, which belongs to the technical field of insulated switches and comprises a circuit breaker operating mechanism and a three-position operating mechanism which are mounted in a mechanism compartment. The grounding interlocking device is arranged between the low-voltage compartment and the high-voltage compartment in a penetrating manner below the mechanism compartment; wherein the three-station operating mechanism, the circuit breaker operating mechanism and the grounding interlocking device are sequentially distributed from top to bottom, and every two of the three-station operating mechanism, the circuit breaker operating mechanism and the grounding interlocking device are mechanically linked; the circuit breaker operating mechanism and the three-station operating mechanism are respectively connected with the circuit breaker and the three-station isolating switch in the inflatable compartment; a rear lower door plate is installed behind the high-voltage compartment cabinet, and the grounding interlocking device is connected with the rear lower door plate. Operation and maintenance personnel must operate in sequence when wanting to open the rear lower door plate of the high-voltage compartment; by adopting the mechanical interlocking, programmed step operation of an operator can be ensured, the reliability is higher, and the personal safety of the operation and maintenance personnel can be further ensured.

The present invention relates to the technical field of disconnectors, and discloses an electric operating device for a high-voltage disconnector, comprising a switch assembly, a support seat, a rotating rod rotatably connected in the support seat, a drive sleeve fixed at the end of the rotating rod, and a drive plate fixed on the surface of the drive sleeve; an operating assembly, arranged on one side of the drive plate, comprising a separation and combination member, a support shell arranged on one side of the drive plate, and a screw rod rotatably connected in the support shell. The beneficial effects of the present invention are as follows: 1. The first spring is compressed or stretched by the screw rod, and the drive plate is driven to move quickly by the spring reset elastic force, so as to realize the rapid separation and closing of the knife switch, reduce the generation of arc, reduce the wear of the contacts, and extend the service life of the equipment; 2. An emergency disconnect mechanism composed of a reset member and an electromagnet is provided. When a circuit fails, the electromagnet drives the limit release, and the tension of the seventh spring prompts the reset block to push the moving seat, quickly opening the knife switch, avoiding the expansion of the fault, and ensuring the safety of the power system.

The invention discloses a bidirectional power electronic switch, a hybrid DC circuit breaker and a control method. The bidirectional power electronic switch comprises a diode bridge module, a buffer circuit, a voltage limiting circuit and an impedance adjusting circuit. The impedance adjusting circuit is connected in parallel with two ends of the diode bridge module; the buffer circuit is connected in parallel with a breaking electronic switch in the diode bridge module; the voltage limiting circuit is connected in parallel with two ends of the breaking electronic switch; the diode bridge module controls the breaking electronic switch to switch current according to a breaking instruction of the power system; when the breaking electronic switch is locked, the buffer circuit suppresses the voltage and current changes of the breaking electronic switch in the switching process, the voltage limiting circuit limits the overvoltage level of the breaking electronic switch, and the impedance adjusting circuit reduces the oscillation frequency. The impedance adjusting circuit reduces the oscillation frequency, reduces the requirement for the reverse recovery speed of the diode, reduces the stress of the diode bridge type module, and enables a conventional common diode to be not liable to be damaged.

The embodiment of the invention provides a fault detection method and a model training method for an isolating switch in power equipment. The method comprises the following steps: detecting a current value of an isolating switch in power equipment, and obtaining a switch parameter set of the isolating switch in a preset time period; the switch parameter set comprises a current sequence, an angle sequence and a torque sequence; the preset time period is a corresponding time period when the current value of the isolating switch detected in real time is greater than or equal to a preset threshold value; the current sequence comprises a current value at each moment in a preset time period; the angle sequence comprises an angle value of each moment in a preset time period, and the torque sequence comprises a torque value of each moment in the preset time period; and inputting the current sequence, the angle sequence and the torque sequence in the switch parameter set into a preset fault identification model for fault identification processing to obtain a fault detection result of the isolation switch. The method is used for achieving the effect of accurately and quickly detecting the fault of the isolating switch of the power equipment.