Arc and resonance elimination and overvoltage protection device of microcomputer

Abstract

The invention provides an arc and resonance elimination and overvoltage protection device of a microcomputer, and relates to the technical field of arc and resonance elimination of power systems. The arc and resonance elimination and overvoltage protection device comprises high-voltage current-limiting fuses, a voltage transformer, a three-phase combined overvoltage protector, vacuum contactors, a microcomputer arc elimination controller, high-voltage fuses and a zero-sequence current transformer, wherein three phases of ports of the three-phase combined overvoltage protector are connected with three phases of high-voltage isolating switches respectively and a ground terminal is connected with the voltage transformer and then grounded; the high-voltage fuses are connected between three phases of ports of the voltage transformer and the three phases of high-voltage isolating switches in series; a voltage transformer control terminal of the microcomputer arc elimination controller is connected with the voltage transformer and a vacuum contactor control terminal is connected with the vacuum contactors; three phases of ports of the high-voltage current-limiting fuses are connected with the three phases of high-voltage isolating switches respectively and the other ends are connected with the vacuum contactors; a vacuum contactor ground terminal is grounded; and the zero-sequence current transformer is arranged between the ground terminal and a ground point. The arc and resonance elimination and overvoltage protection device of the microcomputer is high in acting speed and is an overvoltage protection device capable of achieving arc and resonance elimination.

Description

technical field [0001] The invention relates to the technical field of arc suppression and harmonic elimination in electric power systems, in particular to a microcomputer arc suppression and harmonic elimination and overvoltage protection device. Background technique [0002] At present, in the 3-35KW neutral point non-directly grounded power system, since various overvoltage protectors have no arc suppression, harmonic elimination functions, or single functions, it cannot effectively avoid the atmospheric overvoltage caused by the system phase-to-phase and phase-to-ground , single-phase intermittent arc grounding overvoltage, ferromagnetic resonance overvoltage and other accidents, these overvoltages pose a certain threat to the life and operation safety of power system equipment. Contents of the invention [0003] The purpose of the present invention is to provide a kind of action speed fast. Overvoltage protection device capable of arc suppression and harmonic elimina...

AI Technical Summary

Problems solved by technology

[0002]In the current 3-35KW neutral point non-directly grounded power system, because all kinds of overvoltage protectors have no arc suppression and harmonic elimination functions, or have single functions, they cannot Effectively avoid accidents such as atmospheric overvoltage, single-phase intermittent arc grounding overvoltage, and ferromagnetic resonance overvoltage caused by system phases and phases to ground. These overvoltages have a certain impact on the life and operation safety of power system equipment. the threat of

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