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An Applied Magnetic Field Control System for Voltage Distribution of Multi-break Vacuum Circuit Breakers

A vacuum circuit breaker and voltage distribution technology, which is applied to high-voltage air circuit breakers, circuits, electric switches, etc., can solve the problem of uneven voltage distribution of multi-fracture vacuum circuit breakers, and achieve a good voltage equalization effect

Active Publication Date: 2021-01-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an applied magnetic field control system for voltage distribution of multi-fracture vacuum circuit breakers to solve the problem of uneven voltage distribution of existing multi-fracture vacuum circuit breakers

Method used

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  • An Applied Magnetic Field Control System for Voltage Distribution of Multi-break Vacuum Circuit Breakers
  • An Applied Magnetic Field Control System for Voltage Distribution of Multi-break Vacuum Circuit Breakers
  • An Applied Magnetic Field Control System for Voltage Distribution of Multi-break Vacuum Circuit Breakers

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Embodiment Construction

[0039] The specific embodiments of the present invention are described in detail below with reference to the technical solutions and the accompanying drawings.

[0040] combine Figure 1 to Figure 4 , an external magnetic field control system for voltage distribution of a multi-break vacuum circuit breaker, comprising a power supply unit, a fault current detection and control unit, a ball gap ignition unit, and a magnetic field generation unit.

[0041] Close the remote charging switch S 1 , the DC voltage of the battery is converted into an AC voltage through the inverter, and is passed through the isolation transformer T 1 Afterwards, due to the unidirectional conduction characteristic of the diode, the positive half-wave of the voltage gives the ignition capacitor C 1 charge, negative half wave to the freewheeling capacitor C 2 charge through the voltmeter V 1 After confirming that the requirements are met, turn off the switch S 1 . Close the charging switch S 2 , 22...

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Abstract

The invention belongs to the technical field of high pressure vacuum switches, and relates to an external magnetic field control system for voltage distribution of a multi-break vacuum circuit breaker. The system comprises a power unit, a fault current detection and control unit, a ball gap ignition unit and a magnetic field generating unit. The system can rapidly predict a fault current peak value, compared to a preset value, and the optimal magnetic field applying moment of each fracture in the current is obtained and is sent to the corresponding ball gap ignition unit to complete magnetic field applying. Through adoption of multiple sets of independent power units, the ball gap ignition units and the magnetic field generating units, the parameters of the system are regulated to more particularly controls the intensity, the applying moment and the applying duration of the applied magnetic fields at different fractures so as to finally the achieve the purpose of improving the voltagedistribution.

Description

technical field [0001] The invention belongs to the technical field of high-voltage vacuum switches, and relates to an external magnetic field control system for voltage distribution of a multi-break vacuum circuit breaker. Background technique [0002] Connecting multiple single-break vacuum circuit breakers in series to form a multi-break vacuum circuit breaker is a feasible solution for extending vacuum circuit breakers to high voltage levels. However, in the process of breaking the short-circuit current, the multi-break vacuum circuit breaker will have the phenomenon that the voltage value of each break is different, and this difference will have a great impact on the breaking capacity of the circuit breaker. Taking the double-break vacuum circuit breaker composed of two identical commercial arc extinguishing chambers in series as an example, when undertaking the breaking task, the high-voltage side generally bears 60% to 70% of the total voltage. This makes the high-vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/59H01H33/66
CPCH01H33/59H01H33/66
Inventor 廖敏夫符一凡张豪段雄英董华庆邹积岩
Owner DALIAN UNIV OF TECH
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