Arc-free parallel intelligent bridge strong control high voltage circuit breaker

Abstract

The invention provides an arc-free parallel intelligent bridge strong control type high-voltage circuit breaker. The high-voltage circuit breaker comprises a mechanical switch K, a bridge switch, a controller P, and input-output monitoring instruments V1 and V2, wherein the bridge switch comprise diodes D1, D2, D3 and D4, parallel non-contact switch groups (T1T2...Tn, n is larger than or equal to 2) and a strong control circuit; the strong control circuit comprises a capacitor C, a voltage source E, a resistor R and a switch tube D; a connection point between a positive pole of D1 and a negative pole of D2 serves as a bridge switch inlet end; a connection point between a positive pole of D3 and a negative pole of D4 serves as a bridge switch outlet end; the bridge switch inlet end and a K contact inlet end are jointly connected to a high-voltage input (IR) end; the bridge switch outlet end and the K contact outlet end are jointly connected to a high-voltage output (OUT) end; switch group control electrodes are connected to P; K contacts are firstly switched off and the switch groups are subsequently switched off during switching off; the switch groups are firstly switched on and the K contacts are subsequently switched on during switching on. The circuit breaker is used for replacing the existing high-voltage circuit breaker, so that the problem of prevention and control of arc of the high-voltage circuit breaker is eliminated.

Description

technical field [0001] The invention mainly relates to the field of high-voltage electric power, in particular to a high-voltage circuit breaker with a voltage level above 3KV. Background technique [0002] Historically, the key to why all kinds of high-power circuit breakers installed in the power supply and distribution equipment of the power system can connect or disconnect various load circuits according to people's will, especially to reliably disconnect short-circuit fault circuits It lies in the arc extinguishing function of the circuit breaker arc extinguishing system. [0003] As we all know, when operating a non-no-load circuit, the movable contact and the static contact of the circuit breaker will form a strong electric field at the rated voltage due to the small distance before the connection or the moment after the disconnection, causing medium or air ionization shock. wear, thereby generating an arc between the moving and static contacts. The greater the oper...

AI Technical Summary

Problems solved by technology

However, in practice, it is found that high-power power electronic modules carry load current for a long time to generate large power consumption, and their unavoidable thermal hidden dangers bring greater risks and hidden dangers to system safety, so they cannot replace mechanical switches, let alone medium , High voltage power circuit breaker

[0007] For more than 100 years since the birth of power circuit breakers, experts in product research and development have always focused on the subject of arc extinction and struggled to solve key problems; and since the birth of power electronics technology for decades, experts in product research and development have always focused on high efficiency, high speed and low heat. , no one cared about the change of the basic structure and basic mode of the circuit breaker, and no one introduced a high-power circuit breaker solution that can avoid the switch arc and avoid the risk of online heat loss

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