Transient recovery voltage suppression device of alternating current circuit breaker and high-voltage direct current system

Abstract

The invention discloses a transient recovery voltage suppression device of an alternating current circuit breaker and a high-voltage direct current system. An interlocking control logic link formed by an interlocking control logic module and a signal selection module is added on a circuit for controlling an alternating current circuit breaker, and an on-off strategy of the alternating current circuit breaker is optimized only through interlocking control logic, so the purpose of suppressing the transient recovery voltage of the alternating-current circuit breaker can be achieved without additionally arranging primary equipment such as an additional lightning arrester or adopting a circuit breaker with a higher voltage level, and the purpose of reducing the transient recovery voltage of the alternating-current circuit breaker can be achieved efficiently and economically. In addition, the delay time of the interlocking control logic can be adjusted according to the actual condition of the AC-DC system to adapt to different system working conditions, so that the economical efficiency and the reliability of the high-voltage DC system are improved, and the technical problems that the economic applicability is poor and the reliability is low due to the fact that the reverse recovery voltage of the alternating-current circuit breaker is adjusted by adopting a method of additionally installing a lightning arrester or adopting a circuit breaker with a higher voltage class in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of reverse recovery voltage regulation of a high-voltage AC circuit breaker, in particular to an AC circuit breaker transient recovery voltage suppression device and a high-voltage direct current system. Background technique [0002] Due to the non-linear components such as semiconductor switches in the HVDC power transmission system, there will be certain harmonics on the AC side, and corresponding AC filters need to be configured to filter out the harmonics. According to different filtering frequencies, AC filters usually include different types, each The type also includes multiple group filters. Each group filter is connected to the AC grid by a high-voltage AC circuit breaker. When the DC power level is different, the type of AC filter and the number of groups required are different. AC circuit breaker to obtain the required AC filter configuration to ensure that the system harmonic index and filter vol...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an AC circuit breaker transient recovery voltage suppression device and a high-voltage direct current system, which are used to solve the problem of adjusting the reverse recovery voltage of the AC circuit breaker by installing a lightning arrester or using a circuit breaker with a higher voltage level in the prior art. Technical problems of poor economic applicability and low reliability

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