642 results about "Vacuum circuit breakers" patented technology

The invention relates to the technical field of control systems, in particular to a control system and a control method of an intelligent permanent magnet vacuum circuit breaker, and the system comprises a multi-source signal synchronous acquisition module, an operation mechanism box body of the permanent magnet vacuum circuit breaker and acceleration sensors arranged at preset positions around a permanent magnet operation mechanism, a voltage transformer and a current transformer are connected to a line interface, and a unified sampling frequency and a trigger condition are set. According to the method, vibration, voltage and current signals are synchronously collected at key parts of the permanent magnet vacuum circuit breaker, timestamps are applied, a data basis of multi-source information strong association is constructed, and the direct time sequence relation between the electrical transient state and the mechanical response can be revealed. Segmented windowing and frequency spectrum transformation are carried out on collected vibration signals, a time frequency energy distribution diagram is generated, and instantaneous frequency components and energy evolution details generated by non-stationary events such as impact and friction in the opening and closing process are captured.

The invention specifically relates to a vacuum circuit breaker evaluation system based on multi-modal data analysis, and relates to the technical field of power equipment state monitoring and fault diagnosis. A multi-modal feature extraction and selection module; a fault probability analysis module; and a fault matching and evaluating module. According to the method, key features and a dynamic threshold adjustment mechanism are accurately screened from mass data, traditional fixed threshold limitation is broken through in combination with fault types, noise and stages, key features are prevented from being mistakenly deleted or redundantly reserved, for example, for vacuum arc-extinguishing chamber faults, acoustic feature threshold values are reduced, weak guarantee is achieved, but key features are reserved, and therefore the reliability of the system is improved. Through preliminary screening, importance sorting and redundancy removal, finally 30-40 features focus on the core, multi-modal key information is covered, and calculation redundancy is avoided.

The invention relates to the field of vacuum circuit breakers, in particular to a vacuum circuit breaker opening and closing dynamic characteristic calculation method, device and equipment and a medium. Establishing a three-dimensional geometric model of the pole-mounted vacuum circuit breaker arc extinguish chamber and the moving and static contacts; setting material attributes for each part in the three-dimensional geometric model; constructing a multi-physics field coupling system; the area where the moving contact is located is divided into movable grids, and the grid density of the moving contact and the grid density of the static contact dynamically change along with time; and performing multi-field coupling transient solution according to the three-dimensional geometric model, the multi-physical field coupling system and the movable grid to obtain the dynamic characteristics of the vacuum circuit breaker. The electromagnetic field, the thermal field, the fluid field, the structure field and the circuit are subjected to full coupling analysis, multi-physical field strong coupling dynamic simulation of the whole opening and closing process is achieved, and the dynamic characteristics of the whole opening and closing process can be accurately calculated.

The invention discloses a vacuum arc-extinguishing chamber contact surface condition evaluation method and system, and belongs to the technical field of vacuum circuit breakers. According to the method, short-time Fourier transform noise reduction is improved by adopting an adaptive window length, signals are enhanced in combination with dual-tree complex wavelet transform, and data are dynamically normalized by improving K-means clustering; according to the constructed lightweight CRNN model, residual connection and an SE module are introduced into a convolution module, and a bidirectional quasi-recurrent neural network is adopted by a circulation module to capture time sequence features; the mixed loss function is combined with an AdamW optimizer, and the convergence stability is improved through L2 regularization; and dynamically evaluating the ablation degree of the contact based on a fuzzy logic algorithm. According to the method, through time-frequency feature fusion and lightweight network design, high-precision classification of direct-current pre-breakdown waveforms is realized, the problems of degradation, over-fitting and slow convergence of a traditional model are solved, and an intelligent solution is provided for vacuum arc-extinguishing chamber insulation performance evaluation.

The invention relates to the technical field of vacuum circuit breakers, and discloses a digital deep fusion outdoor high-voltage vacuum circuit breaker which comprises a shell, a protection base is arranged on the shell, a placement groove is formed in the protection base, a plug is arranged in the placement groove, a digital unit used for inserting the plug is arranged on the protection base, and a protection shell is arranged on the shell. The protective shell is used for blocking an opening of the placing groove, a fastener is arranged on the protective shell, and the fastener is used for realizing mutual fixation of the protective shell and the protective base. The protective shell is mounted on the protective base through the fastener, so that the protective base and the protective shell can protect the digital unit; therefore, the digital unit can be stably fixed with the plug, the external damage to the digital unit is reduced, and the digital unit is not easy to damage due to rainwater.

The invention discloses a high-voltage vacuum circuit breaker contact motion detection method and system based on an inversion model, and the method comprises the steps: firstly designing a dual-position speed sensor collection unit for collecting speed signals of different positions and different characteristics, and achieving the mutual triggering; based on an inversion model, a programmable logic component and a CPU are adopted for result operation and logic inversion and correction, a rotation angular velocity curve is obtained, and the accurate motion state is obtained through comparison; according to the method, the stroke characteristic curve in the arc extinguish chamber of the high-voltage vacuum circuit breaker can be accurately reflected, mutual conversion of angular velocity and linear velocity at different positions can be realized based on the thought of an inversion model, and finally effective data which can be analyzed and judged can be output for system application.

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 relates to the technical field of enterprise power grid operation and maintenance, in particular to a rapid isolation protection device for a grounding fault of a power grid neutral point ungrounded system, and aims to solve the problems that when the grounding fault of the power grid neutral point ungrounded system is processed at present, grounding is relieved by generally adopting an arc-extinguishing and resonance-eliminating mode of manually resetting a rapid switch; and a large-area power failure accident is caused by breakdown and short circuit of an insulation weak point of equipment in a system due to too long processing time. According to the device, a fault point is isolated through zero-sequence power direction protection action tripping, closing of the vacuum circuit breaker is converted into metal grounding through action of the quick switch arc-extinguishing and resonance-eliminating circuit, and quick fault isolation is effectively realized through automatic resetting and delay setting functions of the arc-extinguishing and resonance-eliminating circuit. Therefore, the repeated action of the rapid switch arc-extinguishing and resonance-eliminating circuit caused by intermittent arc grounding is avoided, the occurrence rate of large-area power failure accidents caused by arc grounding is greatly reduced, and the safe and stable operation of an enterprise power grid is further ensured.

The invention discloses a parallel double-fracture collaborative breaking structure and method of a vacuum circuit breaker, and belongs to the technical field of circuit breaker structures. The structure comprises a spring operating mechanism, a current sharing mechanism, a transmission mechanism and a double-fracture circuit breaker assembly; the spring operating mechanism is arranged outside a sealed gas box of the gas insulated switchgear, and the spring operating mechanism is connected with the current sharing mechanism and drives the current sharing mechanism to move; the transmission mechanism comprises an upper motion guide rod and a lower motion guide rod, one ends of the upper motion guide rod and the lower motion guide rod are connected with the current sharing mechanism, the other ends are connected with the double-break circuit breaker assembly, and the motion consistency of the transmission mechanism is driven and controlled through the current sharing mechanism; the double-break circuit breaker assembly is connected with the transmission mechanism, and the transmission mechanism drives the double-break circuit breaker assembly to move and is used for switching on and switching off the vacuum circuit breaker switch. According to the invention, the current nonuniformity of the parallel multi-break vacuum circuit breaker in the opening and closing process can be effectively and structurally reduced, and the safety and reliability of power grid operation are improved.

According to one embodiment of the present disclosure, a vacuum circuit breaker may include: a pressure vessel filled with an insulating gas of a predetermined pressure; a vacuum interrupter provided inside the pressure vessel and having a fixed electrode and a movable electrode in a vacuum tube in a vacuum state; a bellows provided to seal a gap between the vacuum tube and the movable electrode; a movable rod, one end of which is connected to an end portion of the movable electrode via an insulating link, and which is capable of penetrating the pressure vessel and reciprocating in an axial direction while maintaining airtightness; a drive rod which is provided outside the pressure vessel at the other end of the movable rod and which transmits the driving force of the drive unit to the movable rod; and a contact pressure spring, one end of which is supported by the movable rod and the other end of which is supported by the driving rod, in which a ratio of a self-closing force of the vacuum interrupter to a minimum closed contact pressure is set to a predetermined ratio.

The invention discloses a vacuum degree condition evaluation method and system of a vacuum arc extinguish chamber, and belongs to the technical field of vacuum circuit breakers. The evaluation method combines RF and an XGBoost algorithm to realize heterogeneous integration, adds a GAN discriminator to perform physical constraint enhancement, and constructs a universal relation model of X-ray intensity and vacuum degree; the feature importance of RF can guide the feature selection or weighting of XGBoost and enhance feature interaction, the confrontation mechanism of GAN can coordinate data fitting and physical constraints, the physical rationality and data authenticity of model prediction are enhanced by means of confrontation training, and a discriminator is used for dual verification of a generated result. The model is ensured to conform to experimental data distribution and theoretical physical law constraints at the same time, and the result credibility is remarkably improved. According to the evaluation method, accurate fitting of the stable attenuation trend in the high vacuum stage and robustness prediction of fluctuation data in the critical vacuum stage can be achieved, and a new thought is provided for vacuum degree condition evaluation.

The invention relates to the technical field of switching device monitoring, and discloses an intelligent monitoring method and system for a vacuum circuit breaker. The method comprises the following steps: synchronously acquiring an operation mechanism vibration signal and an arc extinguish chamber arc current signal during opening and closing; the inherent frequency band energy ratio of the opening spring is extracted through wavelet packet decomposition to serve as a mechanical degradation factor; extracting an arc fluctuation factor based on the time domain integral of the current first-order derivative; the two factors are input into a multi-physics field correlation model, a coupling vector of the contact abrasion depth and the resistance moment of the transmission mechanism is output, and according to the method, a timestamp alignment mechanism that the current rising edge of the opening coil triggers the double-channel acquisition card is used, and synchronization of a vibration signal and a current signal is achieved. The system comprises corresponding function modules and an early warning mechanism. The problem of mechanical / electrical signal time domain splitting is solved, and the state monitoring precision of the vacuum circuit breaker is remarkably improved.

The invention relates to the technical field of electric power, in particular to a vacuum circuit breaker and a phase selection closing control method, and the vacuum circuit breaker comprises a hybrid electromagnetic mechanism and a vacuum arc-extinguishing chamber; the hybrid electromagnetic mechanism comprises a permanent magnet closing assembly and an electromagnetic repulsion opening assembly, the permanent magnet closing assembly comprises double coils and a T-shaped movable iron core which are arranged in parallel, and a discharge loop is formed to drive a movable contact of the vacuum arc-extinguishing chamber to complete a closing action and maintain a closing state; the electromagnetic repulsion opening assembly comprises a static coil panel and a moving coil panel which are coaxially and oppositely arranged to form a reverse current repulsion loop so as to drive a moving contact of the vacuum arc-extinguishing chamber to complete an opening action and maintain an opening state, and the moving coil panel is connected with a T-shaped moving iron core of the permanent magnet closing assembly through an insulating guide rod; the vacuum arc-extinguishing chamber comprises a driving connecting rod, a moving contact and a static contact, one end of the driving connecting rod is connected with the moving contact, and the other end of the driving connecting rod is connected with the insulating guide rod. Therefore, the opening and closing speed of the vacuum circuit breaker is improved.

The invention discloses a fault detection method for a driver of a motor operating mechanism of a vacuum circuit breaker, and relates to the field of internal characteristic inversion of the motor operating mechanism of the circuit breaker. The method specifically comprises the following steps: firstly, constructing an MLD model of a motor driving system based on PWM switching semaphore of an inverter in a permanent magnet synchronous motor driving circuit and current and rotating speed of a motor driven by the inverter; carrying out open-circuit fault simulation analysis on the motor driving circuit in the MLD model; further performing fault simulation analysis to obtain a phase current vector value of an actual fault state of the motor, constructing a theoretical estimation model of the current according to actual parameters of the motor, and calculating a residual value of the actual fault current value and the current estimated by the theoretical estimation model; and finally, according to the current residual values, faults of an upper tube and a lower tube in the motor driving circuit are detected respectively. According to the invention, additional hardware circuits or sensors are not needed, dependence on external feedback signals is avoided, the control structure is simple and efficient, and the dual advantages of low cost and high reliability are achieved.

The invention discloses a vacuum circuit breaker closing electric breakdown multi-physical field coupling simulation calculation method, which comprises the following steps of: performing simulation analysis on an electric field on the surface of a single micro-bulge by constructing a geometric model of a micro-bulge on the surface of a contact of a vacuum circuit breaker to obtain the electric field intensity of the micro-bulge surface and the current density of field emission in the closing process of the vacuum circuit breaker; the critical opening range of field emission is determined; obtaining metal vapor pressure distribution characteristics of the contact material at different moments by taking a critical opening range of field emission as an initial condition; and according to the metal vapor pressure distribution characteristics, obtaining the electron density in the breakdown process of the vacuum circuit breaker so as to determine the evolution rule of the microcosmic plasma parameters and obtain the closing breakdown characteristics. According to the method, the electric breakdown characteristics under different contact surface structures can be accurately analyzed, and an initial plasma condition can be provided for pre-breakdown equilibrium arc modeling, so that the modeling precision is greatly improved.

The utility model belongs to the technical field of vacuum circuit breakers, and relates to an integrated indoor high-voltage vacuum circuit breaker, which comprises a metal underframe, an isolating switch, a grounding switch, a through-wall type solid-sealed polar pole, a vacuum arc-extinguishing chamber and an operating mechanism, and is characterized in that the isolating switch, the grounding switch, the through-wall type solid-sealed polar pole and the vacuum arc-extinguishing chamber are all mounted on the metal underframe; the isolating switch and the vacuum arc-extinguishing chamber are respectively arranged on two sides of the metal underframe and are electrically connected through a through-wall solid-sealed polar pole 11; and the operating mechanism is integrated with a five-prevention interlocking mechanism and is integrally arranged in the metal chassis, and corresponding linkage shafts in the operating mechanism are used for respectively controlling the opening and closing of the vacuum arc-extinguishing chamber, the isolating switch and the grounding switch in a transmission manner. The integrated structure is provided with the isolation station, the circuit breaker station and the grounding switch station, the operation is simple and convenient, the operation is safe and reliable, the whole body is more integrated, complete-set, miniaturized and safe, and the installation is simple, rapid and convenient.

The utility model relates to the technical field of vacuum circuit breakers, and discloses an outdoor pole-mounted solid-sealed primary and secondary fusion permanent magnet vacuum circuit breaker, which comprises a base, a protective shell is arranged on the base, and the protective shell is fixedly connected with the base; the circuit breaker assembly is arranged in the base and the protective shell, the circuit breaker assembly is used for protecting a circuit, the circuit breaker assembly internally comprises an installation frame, a first arc extinguish chamber and a second arc extinguish chamber, the installation frame is arranged on the base and fixedly connected with the base, and the second arc extinguish chamber is elastically connected with the installation frame. The first arc extinguish chamber is fixedly connected with the second arc extinguish chamber, the first arc extinguish chamber is fixedly connected with the mounting rack, the first arc extinguish chamber and the second arc extinguish chamber are respectively arranged, the first arc extinguish chamber and the second arc extinguish chamber are connected in series, and after the first arc extinguish chamber is damaged, the second arc extinguish chamber can be used for transient supporting operation; the vacuum circuit breaker assembly is prevented from being thoroughly paralyzed after being damaged, and damage to the whole circuit is reduced.

This disclosure proposes a vacuum circuit breaker, comprising a stationary conductive component and a moving conductive component. The moving conductive component is configured to adjustably move toward and contact the stationary conductive component to achieve the closing action of the vacuum circuit breaker. The solid-sealed pole also includes a buffer energy-absorbing mechanism, which includes a first movable member and a second movable member. The first movable member is located on the side of the stationary conductive component opposite to the moving conductive component. The second movable member is located on the side of the stationary conductive component opposite to the moving conductive component and is movably connected to the stationary conductive component. The second movable member is movably connected to the first movable member. The buffer energy-absorbing mechanism is used to absorb the impact energy generated when the stationary conductive component contacts the moving conductive component. Through the above design, this disclosure utilizes the movable connection design between the first movable member and the stationary conductive component and the movable connection design between the second movable member and the first movable member to construct a buffer structure with two degrees of freedom, thereby achieving a buffer function in the above two degrees of freedom.

The invention provides a vacuum circuit breaker running-in test bench, and relates to the technical field of circuit breaker running-in. The adjusting assembly is used for adjusting force and displacement generated by vibration of the circuit breaker in the running-in process; when the circuit breaker vibrates left and right, the push rod provides a reverse buffering force according to a force generated by the left and right vibration of the circuit breaker, so that the circuit breaker is kept in a stable state; the buffer assembly is used for buffering vibration of the circuit breaker in the running-in process; when the circuit breaker vibrates up and down, the buffer is used for preliminarily buffering force generated by the up and down vibration in the running-in test of the circuit breaker; the rotating frame is used for adjusting the angle of the adjusting assembly to adapt to circuit breakers with different mounting angles; the device is graded layer by layer, so that the vibration energy of the circuit breaker is consumed layer by layer in the running-in process, the structural integrity and the performance stability of the circuit breaker are kept in a continuous vibration environment, and the scientificity of a test and the durability of equipment are remarkably improved.

The invention relates to the technical field of circuit breakers, in particular to an outdoor pole-mounted vacuum circuit breaker which comprises an arc extinguish chamber, a shell and a driving assembly, the arc extinguish chamber is arranged on the shell, a rotating handle and a pressing block of the driving assembly are arranged outside the shell, a driving rod of the driving assembly is arranged in a first inner cavity of the shell, a static conducting rod is arranged on the upper wall of the first inner cavity, and a moving plate with a driving contact is arranged in the moving plate. The right side wall of the first inner cavity is provided with an angle block and a support, the angle block is connected with a second contact end through a second spring with the inclination angle of 45 degrees, the second contact end is hinged to the right side wall through a first side plate, and the support is provided with an electromagnet below the support. The driving assembly comprises a driving rod, a limiting plate, a pressing block and a rotating handle, according to the outdoor pole-mounted vacuum circuit breaker, the cooperative radial expansion and retraction movement of the second connecting rod and the third connecting rod in the driving assembly is matched with the rotating handle to switch the pressing operation of the pressing block by 180 degrees, and the first connecting block is reliably clamped into an empty groove of the limiting plate to form rigid self-locking.

The invention discloses a vacuum circuit breaker assembly positioning device with an automatic nut locking function, and particularly relates to the field of vacuum circuit breaker assembly.The vacuum circuit breaker assembly positioning device comprises two positioning boxes, positioning seats are fixedly arranged on the sides, close to each other, of the two positioning boxes, and a supporting plate is arranged between the two positioning seats; mounting holes are formed in the two positioning seats, locking nuts are fixedly arranged at the positions, located at the mounting holes, of the bottom ends of the positioning seats, locking screws are arranged at the locking nuts, limiting rods are fixedly arranged at the upper ends of the locking screws, and limiting caps are fixedly arranged at the ends, away from the locking screws, of the limiting rods. The locking screw rod can be matched with the locking nut when rotating, so that the locking screw rod is screwed into the locking nut until the limiting cap tightly abuts against mounting pieces on the two sides of the vacuum circuit breaker, mounting and fixing of the vacuum circuit breaker are achieved, operation is simpler, and the problem that mounting is not easy due to narrow space can be solved.

According to the electromagnetic vacuum circuit breaker synchronous operating mechanism with the pressure auxiliary regulation and control function, pressure conduction structures, a lever structure in the vertical direction and a magnetic suspension technology are additionally arranged on the two sides of a motion structure of a circuit breaker, and circuit breaker contacts can be tightly attracted under driving of a permanent magnet rotor; two groups of parallel electromagnetic windings are adopted for axial and pitching two-degree-of-freedom switching-on control, an orthogonal pressure sensor structure arranged at the upper end of a pressure conduction rod is utilized, a small gap caused by untight attachment of a circuit breaker contact is eliminated, generation of a discharge arc during normal work is avoided, a lever mechanism in the vertical direction is introduced, and the operation stability of the circuit breaker is improved. Equipment power consumption can be reduced. By means of the real practicability, the safe and stable working state of the circuit breaker can be effectively guaranteed, and the problems of asynchronous closing and contact bounce easily existing in a traditional circuit breaker system are solved.

The invention discloses a high-stability permanent magnet type vacuum circuit breaker device, which belongs to the technical field of circuit breakers, and comprises a circuit breaker main body and a mounting mechanism arranged on the circuit breaker main body, the mounting mechanism comprises a clamping piece I and a clamping piece II, a rotating shaft is fixedly mounted at one end of the clamping piece I, a connecting piece is fixedly mounted at one end of the clamping piece II, the connecting piece is rotationally connected with the rotating shaft, clamping plates are fixedly mounted at the other ends of the clamping piece I and the clamping piece II, and the outer side of the clamping piece II is fixedly mounted on the circuit breaker main body; a fixing mechanism is arranged between the first clamping piece and the second clamping piece. Dependence of traditional bolts and tools is abandoned, modular rapid clamping and self-locking design is adopted, and the high-altitude operation efficiency is greatly improved.

The application provides a vacuum circuit breaker, comprising: a mounting frame; a fixed sealed pole component comprising three fixed sealed poles; a mechanical connection component comprising a linkage rotating shaft, three driving link units and an auxiliary switch assembly; an operating component arranged on the mounting frame, comprising a safety switch assembly for switching action of the three fixed sealed poles; the safety switch assembly comprises a driving unit, a ratchet unit and a linkage unit; the ratchet unit comprises a top pressure ratchet block and a ratchet wheel. When the vacuum circuit breaker is powered off, the driving unit drives the auxiliary rotating shaft to rotate, the auxiliary rotating shaft drives the linkage rotating shaft to keep in a breaking state through an auxiliary link set, and the tripping reset is achieved; when the vacuum circuit breaker is powered on, the rotating direction of the auxiliary rotating shaft is limited through the ratchet unit, manual operation is needed to loosen the top pressure ratchet block for reset action, and the possibility of automatic connection of the tripping reset, too large transient voltage and damage of electrical elements is avoided.

The utility model relates to the field of electric power system and high voltage switch equipment discloses vacuum circuit breaker with signal feedback mechanism, including arc extinguishing chamber, the bottom fixedly connected with mechanism box of arc extinguishing chamber, the outside of mechanism box is provided with quick -witted connection mechanism, the top fixedly connected with voltage transformer of quick -witted connection mechanism, the outside fixedly connected with base of mechanism box, the outside of base is provided with quick -witted break mechanism, quick -witted connection mechanism includes support connecting plate, the outside fixedly connected with air cylinder no.

A vacuum circuit breaker includes: a vacuum valve accommodated in a tank having a cylindrical shape; a movable-side shield installed on a movable side of the vacuum valve; a movable-side main contact point having a tubular shape to cover the vacuum valve and the movable-side shield from radially outside; a contact point driver that moves the movable-side vacuum contact point and the movable-side main contact point in conjunction with each other; and an insulating rod that transmits a force to the contact point driver. The contact point driver includes: a low gas pressure section lever connected to a contact via a contact pressure applier that applies a contact pressure to the contact; a rotary seal shaft fixed to the low gas pressure section lever; and a high gas pressure section lever fixed to a portion of the rotary seal shaft exposed to the high gas pressure section.

The embodiment of the invention provides an energy storage clutch transmission device. The energy storage clutch transmission device comprises a first transmission part, a second transmission part, a support and a shifting part. The first transmission part and the second transmission part are arranged on the support, and the shifting part is used for shifting the second transmission part to be connected with or separated from the first transmission part. A longitudinal rotation isolation vacuum circuit breaker comprises an outer frame, a pole assembly, an energy storage motor, an energy storage piece and the energy storage clutch transmission device. The pole assembly is rotationally arranged on the outer frame and connected with the shifting piece, one end of the second rotating shaft is connected to an output shaft of the energy storage motor, and the energy storage piece is connected to one end of the first rotating shaft and the pole assembly. According to the embodiment of the invention, the technical problem of stalling damage of the energy storage motor is solved.

The invention relates to the technical field of power equipment, and discloses a high-capacity vacuum circuit breaker and a direct current change-over switch, the high-capacity vacuum circuit breaker is applied to the direct current change-over switch, and the high-capacity vacuum circuit breaker comprises N vacuum arc extinguish chambers and M current sharing structures; wherein the N vacuum arc-extinguishing chambers are mutually connected in parallel and are connected with a first branch circuit of the direct current change-over switch to form N parallel branch circuits, the N vacuum arc-extinguishing chambers are arranged in parallel along a preset direction, the M current-sharing structures are all made of the same magnetic conductive material and are arranged in a closed ring shape, the M current-sharing structures are sleeved on the corresponding vacuum arc-extinguishing chambers, and the M current-sharing structures are connected in parallel with the first branch circuit of the direct current change-over switch. N is an integer greater than or equal to 2, M is an integer greater than or equal to 1, and when the first branch conducts current, equivalent inductance is generated in the branches to limit current transfer between the branches, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1. According to the technical scheme, the equivalent resistance in a normal through-current state can be prevented from being increased while the equivalent inductance of the branch is increased to limit current transfer, the electric energy transmission efficiency is guaranteed, and the loss is reduced.

The invention relates to the technical field of high-voltage vacuum circuit breakers, in particular to a direct insertion type disconnecting switch for a high-voltage vacuum circuit breaker, which comprises a protection box, the protection box is arranged at the bottom of a vacuum tube base body, and a plurality of lifting pieces are arranged in the protection box. Isolation movable plug base bodies are installed at the two ends of the lifting piece. The protection box is installed at the bottom of the vacuum tube base body, the lifting piece, the isolation movable plug base body and the driving assembly are integrated in the protection box, the compact modular design is formed, the overall occupied space is greatly reduced, and the isolation base at the bottom of the vacuum tube base body and the movable insertion rod form a matched insertion structure; the movable insertion rod directly moves up and down through the lifting piece, an intermediate transmission mechanism is not needed, the mechanical loss is extremely low, the operation is smoother, and the longitudinal space of the circuit breaker is fully utilized through the arrangement of the movable insertion rod and the isolation base in the vertical direction.

The application discloses a kind of vacuum switch contact ablation intelligent evaluation method based on physical information fusion, belong to vacuum circuit breaker technical field.The method of the present application includes: according to the data set of vacuum switch breaking type obtained from vacuum arc experimental data, construct physical information enhanced support vector machine to predict breaking type of working condition;Vacuum arc simulation model is extracted from each working condition Contact surface energy flow density radial distribution data, and is fitted by Gaussian function;Based on the energy flow density radial distribution curve obtained by fitting, a vacuum arc simulation data set is constructed, and a physical information enhanced Gaussian process regression is constructed to predict the energy flow density of the working condition;Combining the heat transfer model to solve the radial distribution of contact surface temperature, further quantitatively evaluate the ablation degree of contact surface, and output the ablation degree level.The present application embeds the physical law of vacuum arc into machine learning model, realizes the breaking type prediction, energy flow density prediction and contact temperature rise calculation and ablation degree calculation and evaluation.