Arc-free intelligent bridge strong control high voltage circuit breaker

Abstract

The invention provides a non-arc intelligent bridge strong-controlled type high-voltage circuit breaker. The non-arc intelligent bridge strong-controlled type high-voltage circuit breaker comprises a mechanical switch K, a bridge switch, a strong-controlled circuit, a controller P and input and output monitoring instruments V1 and V2; the bridge switch is composed of diodes D1, D2, D3 and D4 and a non-contact switch T; the strong-controlled circuit comprises a capacitor C, a voltage source E, a resistor R and a non-contact switch D; the input end (negative electrode of the D1) of the bridge switch and a K contact input end are synchronously connected with a power input (IR) end, and while the output end (negative electrode of the D3) of the bridge switch and a K contact output end are synchronously connected with a power output (OUT) end; control electrodes of the T and D and a coil of the K or a driving device are connected with the P; when switching off the circuit breaker, a main contact of the K is disconnected and then the T is disconnected; when switching on, the T is connected and then the K contact is connected; therefore, the arc generating condition is removed; such circuit breaker is economic, simple and safe, and can replace the existing various traditional high-voltage circuit breakers.

Description

technical field [0001] The invention mainly relates to a high-voltage switchgear in the field of 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 (especially a circuit with a serious short-circuit fault), the moving contact and the static contact of the circuit breaker are under the rated voltage due to the small distance at the moment before they are connected or after they are disconnected. A strong electric field is formed to cause ionization breakdown of the mediu...

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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