653 results about "Voltage rating" patented technology

The invention relates to an off-grid parallel operation starting method of an energy storage system, the energy storage system and a storage medium, and belongs to the technical field of energy storage. The host receives the phase locking synchronization completion signal and sends a voltage unification instruction to the slave after determining that the grid-connected slave completes phase locking synchronization, and the host and the slave are boosted from the black start voltage to the rated voltage based on the voltage unification instruction to complete parallel start, so that fluctuation caused by unstable voltage in the start process of the slave can be improved; the stability of the energy storage system in the off-grid parallel operation process is improved; the slave is started after being synchronized according to the black start voltage phase lock phase established by the host, so that the output voltage after the slave is started is consistent with the output voltage of the host, the voltage consistency of the parallel energy storage current device is high, ring current caused by voltage difference can be reduced, and the operation efficiency of the system is improved; and the slave is started after successful phase locking, so that the risk of starting failure can be reduced.

A converter system, e.g., for vehicle-to-vehicle charging, includes galvanically-isolated modular first and second converters having the same maximum voltage rating, a direct current (DC) voltage bus interconnecting the converters, and an electronic controller. An input voltage to the DC bus is converted into an output voltage via switching control signals to the modular converters. The system's voltage rating may equal the maximum of the input and / or output voltage, or it may equal the maximum input voltage and be about 50-percent of the maximum output voltage. The maximum input and output voltages may be equal. When the voltage rating is about 50-percent of the maximum input voltage, capacitors may be connected in parallel with the modular converters on an input side thereof. Switching circuits may be connected to the bus to control the conversion of the input voltage via switching control signals.

The invention provides a simulation calculation method of an urban rail transit traction power supply system, which comprises the following steps of: constructing a locomotive load model, establishing a locomotive running state information table with a unified time section, and combining the position of a locomotive with the position of a traction station in a line to obtain topological structure analysis of different time sections; constructing a traction power supply system model, and obtaining rated voltage, line length, line unit impedance and traction position; simulating that a plurality of locomotives start from a vehicle depot and run from the head end of a line to the tail end of the line, obtaining power and position values of the locomotives according to a locomotive load model, substituting the power and position values into a traction power supply system model to complete load flow calculation of a direct-current traction network, and obtaining current and voltage of the locomotives and bus voltage and feeder current values of a traction station; according to the invention, the power of the train in different operation states can be simulated, and the bus voltage and feeder current of each traction station of the traction power supply system can be calculated.

The invention discloses a switch cabinet operation reliability evaluation method, relates to the field of switch cabinets, and solves the problem of low accuracy of switch cabinet operation reliability evaluation caused by non-targeted test, and the method comprises the following steps: collecting rated voltage values and rated current values of multiple groups of driving plug-ins and power modules in a target switch cabinet; performing an electrical variable protection test on each group of driving plug-ins in the target switch cabinet to obtain an electrical variable protection test result of the corresponding driving plug-ins; performing an over-temperature protection test on each group of power modules in the target switch cabinet to obtain an over-temperature test result of the corresponding power module; performing an open-phase protection test on the target switch cabinet to obtain an open-phase test result corresponding to the target switch cabinet; and integrating all test results corresponding to the target switch cabinet, and evaluating the reliability of the target switch cabinet based on the test results. According to the invention, through targeted testing of different accessories in the switch cabinet, accurate evaluation of the operation reliability of the switch cabinet is realized.

The invention relates to the technical field of new energy automobile electric control, and discloses a self-adaptive voltage dynamic stability control method for a new energy automobile converter. The method comprises the following steps: acquiring a real-time voltage time sequence data sequence of the new energy automobile converter in an operation period; performing voltage disturbance characteristic analysis on the real-time voltage time sequence data sequence based on a rated voltage interval of the converter, and identifying voltage disturbance modal information of the converter; then, according to an embedded voltage control strategy library and a voltage stability threshold condition, an initial voltage regulation and control instruction sequence is generated in combination with voltage disturbance modal information of the converter; performing voltage change trend prediction on the voltage disturbance modal information of the converter to obtain predicted voltage disturbance modal information; performing voltage control compensation optimization on the initial voltage regulation and control instruction sequence based on the predicted voltage disturbance modal information to generate an optimized voltage regulation and control instruction sequence; and performing adaptive voltage regulation on the new energy automobile converter according to the optimized voltage regulation instruction sequence.

The invention provides a direct-current power transmission high-frequency harmonic measuring device and method, and belongs to the technical field of high-frequency harmonic measurement. The measuring device comprises a digital-to-analog conversion module, a photoelectric conversion module and a main control module; the main control module comprises a first processor and a second processor, the first processor is used for acquiring an initial direct-current voltage signal and a rated voltage signal, and the second processor is used for performing data calculation on the initial direct-current voltage signal and the rated voltage signal acquired by the first processor to obtain a high-frequency harmonic signal. The invention provides a miniaturized and portable measuring device which can solve sampling errors and realize accurate measurement of high-frequency harmonic waves.

The invention provides a new energy field grid-connected system broadband oscillation wide-area propagation path tracking method and device, and the method comprises the steps: firstly obtaining an electrical main wiring diagram of a transformer substation, numbering incoming and outgoing lines, and recording the rated voltage and capacity of the incoming and outgoing lines; and monitoring harmonic voltage and current of the high-voltage bus and the low-voltage bus of the transformer substation, carrying out fast Fourier analysis, and judging whether oscillation occurs or not. If oscillation occurs, the concerned oscillation spectrum range and harmonic wave type are determined, and the sampling frequency is determined. Then, a sampling instruction is issued, voltage and current data of all lines are collected, and per-unit processing is carried out; and performing Fourier series analysis on the data to obtain a harmonic spectrogram. And finally, determining an oscillation propagation path in combination with the main wiring diagram, the operation mode and the spectrogram so as to quickly position disturbance sources, quantify responsibilities of multiple disturbance sources and improve system stability.

The invention relates to the technical field of switching power supplies, in particular to a self-locking flyback switching power supply circuit with overcurrent and overvoltage protection, which comprises a primary side control circuit, a power conversion circuit, a synchronous rectification circuit and an output circuit, and is characterized in that a self-locking circuit is electrically connected with an overvoltage detection circuit and an overcurrent detection circuit; wherein the over-current detection circuit is used for detecting whether output current exceeds rated current or not; the overvoltage detection circuit is used for detecting whether the output voltage exceeds the rated voltage; and the self-locking circuit is used for pulling down the starting voltage of the primary side control circuit and the synchronous rectification circuit to a low level when the output overvoltage or overcurrent is detected, so that the power conversion circuit stops working until the input voltage is disconnected. According to the invention, the defects of response speed, protection precision, cost and adaptability in over-current and over-voltage protection of the existing flyback switching power supply are overcome.

The invention discloses a low-voltage ride-through response control method based on a voltage threshold and duration, and the method comprises the steps: collecting the three-phase voltages Ua, Ub and Uc of a power grid in real time, and calculating the equivalent voltage Um of a grid-connected point according to the three-phase voltages Ua, Ub and Uc of the power grid; a preset rated voltage Un is obtained, and an early warning mark position is determined based on the preset rated voltage Un, the equivalent voltage Um of the grid connection point and a preset fault ride-through judgment strategy, and the early warning mark position comprises 0 and 1; when the state that the early warning mark position is specifically 1 is kept continuously in a preset time period, the fault level is determined based on the equivalent voltage Um of the grid-connected point, the preset rated voltage Un and the fault level strategy, and the fault level comprises the first fault level and the second fault level; and regulating and controlling the power grid voltage according to the fault level. According to the low-voltage ride-through response control method based on the voltage threshold and the duration, the sensing and response speed of an operator to the state change of the power grid is improved, and the possibility of artificial delay is reduced.

The invention discloses a direct black-start method and system for a grid-forming type permanent magnet direct-drive wind turbine generator, and the method comprises the steps: starting a rotor-side converter, accelerating a permanent magnet direct-drive fan to a given rotating speed, continuously charging a direct current side when the rotating speed rises until a rated voltage is reached, and maintaining the capacitor voltage of the direct current side through machine-side control; a grid-side converter is started, and inertia support is provided for the system through control of the virtual synchronous machine; a load is accessed, and a virtual synchronous machine and a linear active-disturbance-rejection technology are combined to improve the stability of a network construction type system. According to the method, the autonomous frequency and voltage supporting capacity of the direct-driven wind turbine generator are improved, the direct-driven wind turbine generator can independently serve as a black-start power supply to participate in power grid black-start, and the black-start process can be effectively achieved for a regional power grid lacking a conventional black-start power supply.

The invention provides a multi-path self-adaptive constant-voltage constant-current charging device, and the device comprises an input module which comprises a plurality of paths of input power supplies with the same rated voltage and limited power; the summarizing module is connected with each path of input power supply and combines the input power supplies into a single path for output; the conversion module is connected with the gathering module and is used for converting the single-path output voltage into target voltage and realizing constant-voltage output through a feedback loop; the detection module is connected with the input module and is used for detecting the effective path number of the input power supply and outputting a signal; and the control module dynamically adjusts the gain of the amplification circuit according to the output signal, and realizes constant current output by combining the current feedback of the conversion module. The summarizing module solves the problems of cost and size; the detection module and the control module jointly improve efficiency and stability; and meanwhile, a dynamic adjusting mechanism of the control module ensures constant-voltage and constant-current output under different input conditions. The modules operate cooperatively, so that the charging device is superior to the prior art in expansibility, efficiency and stability.

The invention belongs to the technical field of current transformers, and particularly relates to a current transformer and a production technology thereof.The current transformer comprises a primary winding, the lower end of the primary winding is sleeved with a plurality of secondary windings, an isolation plate is arranged between every two adjacent secondary windings, one end of each isolation plate is fixed to the primary winding, and the other end of each isolation plate is inserted into a groove in the inner side of a shell; epoxy resin is poured in the shell, after the epoxy resin is cured, the lower end of the primary winding and the secondary windings are packaged in the shell, the epoxy resin serves as insulation, and the voltage transformer is suitable for current and electric energy measurement and relay protection in an electric power system with the rated voltage of 66kV and the rated frequency of 50Hz. The oil-free and gas-free SF6 gas insulation device has the advantages of being oil-free, gas-free, flame-retardant, explosion-proof, maintenance-free, high in safety and reliability and the like, is pollution-free to the environment, is a similar product for replacing domestic and external oil insulation and SF6 gas insulation, and is suitable for being used for current and electric energy measurement and relay protection in an electric power system.

The invention relates to the technical field of anti-electromagnetic interference, and provides a Type-C interface power supply surge protection design method. Comprising a Type-C interface power supply, and the Type-C interface power supply is composed of a Type-C interface, a transient suppression diode D4 and a chip end. The design method comprises the steps of obtaining an initial circuit schematic diagram and a surge protection requirement of a Type-C interface, and determining rated voltage, rated power and response time of the Type-C interface; determining a first electrical characteristic that the Type-C interface generates low-voltage surge interference according to the rated voltage and the rated power, and configuring multiple TVS transient voltage suppressor diodes at the output end of the Type-C interface to generate a first circuit schematic diagram; acquiring a second electrical characteristic after the configuration of the multiple TVS transient voltage suppressor diodes, and configuring a plurality of common-mode inductance filters at the output ends of the multiple TVS transient voltage suppressor diodes to generate a second circuit schematic diagram; and according to the second circuit schematic diagram, generating a Type-C interface to be verified, and performing a low-voltage surge test.

The invention discloses a cross-linked polyethylene insulating material for middle and high voltage cables and a preparation method of the cross-linked polyethylene insulating material. Comprising the following raw material components in parts by weight: 100 parts of a polyethylene base material, 1.0-2.5 parts of a peroxide cross-linking agent, 0.05-0.5 part of an anti-scorching agent, 0.1-5.0 parts of a water tree resistant additive, 0.1-1.0 part of a main antioxidant, 0.1-1.0 part of an auxiliary antioxidant, 0-2.0 parts of a processing aid and 0-0.5 part of a metal deactivator. The cross-linked polyethylene insulating material for the middle-high voltage cable is suitable for manufacturing a power cable insulating layer with the rated voltage of 10 kV or above. And the method is particularly suitable for application scenes with high requirements on processing stability, long-term reliability and energy efficiency.

The invention relates to the technical field of electric power, in particular to a micro-grid system and a control method thereof. The micro-grid system comprises a power generation device and a first voltage acquisition device deployed on the side of the power generation device, and the power generation device is configured to improve power output in response to the fact that the bus voltage detected by the first voltage acquisition device is lower than rated voltage; the second voltage acquisition device is deployed on the side of the energy storage device, and the energy storage device is configured to determine a working mode according to the bus voltage detected by the second voltage acquisition device.

The invention relates to the technical field of voltage compensation, in particular to a rapid compensation method for realizing stable voltage output of a distribution line in a transformer area. The method comprises the following steps: dividing a plurality of characteristic intervals according to the difference between each phase of voltage data and a standard voltage; determining a deviation characteristic value of the phase voltage according to the correlation degree between the phase voltage and each type of other data of the node, the maximum deviation value of the phase voltage and the maximum deviation value of each type of other data; according to the intersection-to-union ratio and the deviation characteristic value of each characteristic interval and each overrun interval, determining an influence characteristic value of the characteristic interval; determining a compensation coefficient of the phase voltage of the node according to the three-phase unbalance degree of each key node and the corresponding intermediate node and the influence characteristic value of the characteristic interval; and determining the reactive compensation amount according to the rated voltage value, the real-time voltage and the line impedance in response to the fact that the real-time voltage is located outside the preset interval. The method can improve the stability of voltage output of the distribution line in the transformer area.

The invention provides a multi-bridge-arm integrated valve tower structure, a high-voltage direct-current transformer and a power system. The multi-bridge-arm integrated valve tower structure comprises a high-voltage bridge arm branch, a multiplexing bridge arm branch, a low-voltage bridge arm branch, a high-voltage port and a low-voltage port. One end of the high-voltage bridge arm branch, one end of the low-voltage bridge arm branch and one end of the multiplexing bridge arm branch are connected; the high-voltage bridge arm branch comprises a plurality of first half-bridge sub-modules which are connected in series; the multiplexing bridge arm branch comprises a plurality of second half-bridge sub-modules which are connected in series; the low-voltage bridge arm branch comprises a plurality of full-bridge sub-modules which are connected in series; the number of the first half-bridge sub-modules, the number of the second half-bridge sub-modules and the number of the full-bridge sub-modules are in direct proportion to the voltage withstand level of the valve tower structure. According to the structure, the high-voltage bridge arm branch, the multiplexing bridge arm branch and the low-voltage bridge arm branch are connected in a T-shaped mode, the number of the first half-bridge sub-modules, the number of the second half-bridge sub-modules and the number of the full-bridge sub-modules are determined according to the voltage withstand level needed by the valve tower, and the structure can be suitable for voltages of different levels.

The invention relates to the technical field of intelligent charging early warning, and discloses an electric vehicle intelligent charging security early warning alarm system, which comprises a charging data acquisition module used for acquiring the charging voltage of an electric vehicle during charging, analyzing and processing the charging voltage of the electric vehicle during charging and the rated voltage of an electric vehicle battery to obtain a charging voltage difference, and sending the charging voltage difference to an early warning module; the system comprises a monitoring module for monitoring the charging voltage difference when the electric vehicle is charged and processing and analyzing the charging voltage difference to obtain an over-limit early warning value, an over-limit early warning judgment module for judging whether charging over-limit early warning needs to be carried out when the electric vehicle is charged according to the over-limit early warning value, and a charging fluctuation analysis module for constructing a voltage difference change curve according to the charging voltage difference when the electric vehicle is charged in a monitoring period, the charging fluctuation early warning module is used for establishing a positive and negative voltage difference interval and processing and analyzing the voltage difference change curve and the established positive and negative voltage difference interval to obtain a charging fluctuation performance value, and the fluctuation early warning module is used for judging whether charging fluctuation early warning needs to be carried out when the electric vehicle is charged or not according to the charging fluctuation performance value.

The invention relates to a hybrid power system and a vehicle. The hybrid power system comprises a first storage battery; a motor; the direct current converter is electrically coupled with the first storage battery and the motor; and a controller communicatively coupled with the DC converter and the electric machine and configured to: send a boost control signal to the DC converter to switch the DC converter to a boost mode; in response to detecting that the voltage output by the DC converter in the boost mode exceeds a threshold voltage, indicating that the motor operates in a power generation mode; and sending a step-down control signal to the direct current converter based on the fact that the voltage output by the motor in the power generation mode is maintained at the rated voltage of the motor, the DC converter is switched from the boost mode to a buck mode to supply power generated by the motor in the power generation mode to the first battery.

The invention discloses a three-phase line independent driving control system of a three-phase motor, which belongs to the technical field of three-phase motor driving control and comprises an auxiliary switching power supply, a microprocessor software motor operation control module and a motor three-phase electromagnetic coil driving module, the motor three-phase electromagnetic coil driving module is provided with a unique bridge type driving structure and a phase current control capacitor unit, the system can reduce the reverse electromotive force of the motor to be half of the conventional electromotive force, the maximum rotating speed and the maximum transmission power are doubled, and the rated power output and the maximum rotating speed can still be ensured when the rated voltage is doubled. The microprocessor software motor operation control module can accurately control the operation state of the motor, all the modules work cooperatively, stable power supply support, accurate control monitoring and efficient driving are achieved, the reliability and stability of the system are improved, and the system is suitable for various industrial and battery power supply scenes and has wide application prospects.

The invention relates to the technical field of energy storage converter control, and particularly discloses an adaptive virtual impedance control method for a grid-connected inverter in a fault state, which comprises the following steps of: acquiring an output voltage, and when the output voltage is smaller than a voltage threshold, determining that the grid-connected inverter is in a fault state; according to the output voltage, calculating the voltage drop of the rated voltage and the reactive current needing to be injected into the inverter; calculating a real part and an imaginary part of the virtual impedance according to the output voltage, the voltage drop of the rated voltage and the reactive current needing to be injected into the inverter; obtaining an output current, and calculating an adaptive virtual voltage according to the output current and the real part and the imaginary part of the virtual impedance; and revising an output voltage reference value by using the self-adaptive virtual voltage, and then carrying out double-loop control to generate a PWM (Pulse-Width Modulation) gate signal. According to the invention, the voltage drop is used as an action signal of the virtual impedance, and the inverter injects the reactive current proportional to the voltage drop to reduce the fault when the power grid has the fault.

The disclosure provides a power tool and power tool system, including: a first slot and a second slot; when the power tool is in a double-pack working state, battery packs are respectively arranged in the first slot and the second lot; when the power tool is in a single-pack working state, the battery pack is arranged in the first slot or the second slot, and both the double-pack working state and the single-pack working state provides a same rated voltage to the power tool.

The invention discloses a load matching method of a tested power supply and related equipment. The method comprises the following steps: acquiring rated voltage, rated current and rated power of a tested power supply, drawing a power supply parameter curve based on the group of parameters, and determining a current turning point from the power supply parameter curve; according to the magnitude relationship between the actual output voltage of the tested power supply and the voltage corresponding to the current turning point, the rated current or rated power is flexibly selected as a reference basis to determine the resistance value of each load in the load box; and finally, selecting a plurality of loads connected in parallel from the load box as test loads according to the actual output voltage, and ensuring that the actual output current of the tested power supply reaches the rated current or the actual output power reaches the rated power. The rated current or the rated power is dynamically switched through the current turning point to serve as a reference basis, the load requirements of the tested power supply in different voltage intervals are accurately adapted, and the adaptability of load matching is greatly improved.

The invention relates to the field of power system equipment detection, in particular to a residual magnetism measuring device and method for a large power transformer. The residual magnetism measuring device for the large-scale power transformer comprises the large-scale power transformer, a high-voltage bushing, a high-voltage neutral point bushing, a low-voltage bushing, an iron core outgoing line bushing, a first capacitor, a second capacitor, a detection impedor, a partial discharge instrument and a large-current generator, the capacitance of the first capacitor is 30pf-40pf and is matched with the capacitance of a transformer iron core, and the capacitance of the second capacitor is 300pf-400pf and is 10 times proportional to the capacitance of the first capacitor; the method comprises the following steps: carrying out a long-time induction withstand voltage and partial discharge test after a conventional test, measuring discharge amounts Q1, Q2 and Q3 at 0.5, 1 and 1.5 times of rated voltages, judging residual magnetism according to the difference value of the discharge amounts and an iron core grounding current, and if the residual magnetism exceeds the standard, magnetizing and demagnetizing by using a large current generator at the frequency of 150Hz. The method has the advantages that the residual magnetism is measured and evaluated in time, equipment faults are avoided, operation is easy and convenient, and adaptability is high.

The present disclosure provides a charge control circuit, a charging device and a charging system. The charge control circuit comprises a power input end, a power output end, a switch unit, a control unit and a detection unit, wherein rechargeable batteries comprise a first rechargeable battery and a second rechargeable battery; the power output end comprises a first power output end and a second power output end; the switch unit comprises a first switch and a second switch; a voltage adjustment circuit is connected between the first switch and the first power output end; and when the detection unit detects that the rated voltages of the rechargeable batteries are not the same, the control unit controls the second switch to be closed and the second rechargeable battery is charged, and at the same time the control unit controls the first switch to be closed and activates the voltage adjustment circuit.

The invention discloses a speed regulation ratio evaluation method for a bladeless fan. The speed regulation ratio evaluation method comprises the steps that S1, the tested bladeless fan is placed in a test room; s2, arranging a plurality of anemometers in array distribution in front of the air supply outlet of the bladeless fan, wherein the blade planes of all the anemometers are parallel to the air supply outlet plane of the tested bladeless fan; s3, the bladeless fan is started, the bladeless fan runs under the rated voltage and the rated frequency, and if a head shaking mechanism exists, the head shaking mechanism is closed; s4, the bladeless fan speed regulator is arranged at the highest wind speed gear, and the measured wind speed vmh of the highest wind speed gear is obtained through measurement; s5, the bladeless fan speed regulator is arranged at the lowest wind speed gear, and the measured wind speed vml at the lowest wind speed gear is obtained through measurement; and S6, the ratio of the measured wind speed vml at the lowest wind speed gear to the measured wind speed vmh at the highest wind speed gear is calculated, and the speed regulation ratio of the bladeless fan is obtained. According to the method, the performance index evaluation of the speed regulation ratio of the bladeless fan can be scientifically and accurately evaluated.

The invention relates to the technical field of circuit component selection and matching, in particular to a circuit component selection and matching method and system and a medium. The method comprises the following steps: acquiring rated voltages and rated currents of different elements through circuit assembly information; establishing a blank circuit simulation space by adopting the blank circuit design information; performing overload thermal density quantification on the rated voltage and the rated current of the different elements according to the blank circuit simulation space, and performing element performance degradation comparison among the different elements to obtain element performance degradation ratios among the different elements; performing periodic performance degradation prediction based on the element performance degradation ratio to obtain a periodic performance degradation prediction report among different elements; and carrying out stability test on the periodic performance decline prediction report, and carrying out circuit element selection and matching based on the stability test. According to the invention, the circuit component selection and matching technology is optimized, so that the circuit component selection and matching technology is more perfect.

The application relates to the field of power systems, in particular to a control switching method and device of a converter device in a power supply system, which can be applied to energy storage converters in new energy micro-grid, electrochemical energy storage power station and the like. In the method, the voltage of the converter device at the control switching moment is saved, and the voltage is taken as an initial value after switching, then the rated voltage is transitioned in a first time period, so that voltage and current distortion and regulation time in the control switching process can be reduced. Meanwhile, through given phase initial values, circulation between converter devices in a power supply system with multiple converter devices under asynchronous switching is avoided.

The invention discloses a pilot protection method for an offshore wind power low-frequency cable outgoing line, and belongs to the technical field of power system relay protection, the pilot protection method comprises the following steps: determining a voltage break variable according to acquired voltage information on two sides of a low-frequency cable line, and when the voltage break variable is greater than a preset rated voltage, starting protection and carrying out fault state judgment; according to the maximum value and the minimum value of the current of the current information of the two sides of the low-frequency cable line in the same data window, probability distribution of the current of the two sides of the low-frequency cable line is determined, and a divergence value K of the probability distribution is obtained; comparing the divergence value K value with a setting threshold value, and determining the types of internal and external faults of the low-frequency cable line; and executing corresponding protection operation according to the fault judgment result. According to the method, the current probability distribution difference of the two sides of the low-frequency cable line is extracted, the K-L divergence value K is calculated, and the protection criterion is constructed to perform internal and external fault judgment, so that the accuracy of the judgment result is improved, and the corresponding protection operation is quickly executed.

The invention relates to the technical field of power distribution network overhead line pole-mounted switches, and discloses an all-insulation vacuum circuit breaker which comprises a circuit breaker body, a plurality of sets of pole columns are arranged above the circuit breaker body, the top of each set of pole column is provided with an all-insulation quick-connection wire inlet terminal, and the side edge of each pole column is provided with an isolation knife static end. The front end of the isolation knife static end is provided with an isolation knife moving end, and the tail part of the isolation knife moving end is connected with an all-insulation quick-connection outgoing line terminal. According to the scheme, the condition of inter-phase short circuit or inter-phase flashover is eliminated, the problem that the isolation knife is bounced off or virtually closed due to the fact that instantaneous current is too large is avoided, and a key effect is achieved on effective closing of a circuit. Compared with a common inner cavity assembly type pole, the integrated casting solid-sealed pole has the advantages that the electrical performance is more stable and reliable, and the partial discharge capacity under rated voltage is greatly reduced. And the embedded electricity taking capacitor can be configured with controllers with different powers, a potential indicator and a temperature sensor, so that problems of the circuit or the circuit breaker body can be found in time and maintained in time.