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CN104137211A 具有缓冲电路的高压直流混合电路断路器 有权 转让

具有缓冲电路的高压直流混合电路断路器
摘要：
提供了一种高压直流(HVDC)混合电路断路器(200)。该电路断路器包括：固态主断路器(210)；串联连接的机械快速切断开关(220)和固态辅助断路器(230)，串联连接的切断开关和辅助断路器并联连接到主断路器；包括电容器的缓冲电路(250)；以及被配置为响应于辅助断路器被断开而切断缓冲电容的开关装置(270)。通过切断缓冲电容，该电容器经过切断开关和主断路器的不受控放电，以及所导致的在断路动作时流经切断开关的非零电流，可以被避免。进一步，提供了一种高压直流混合电路断路器的方法。
摘要（英）：

A high voltage direct current (HVDC) hybrid circuit breaker (200) is provided. The circuit breaker comprises a solid-state main breaker (210), a mechanical fast disconnector (220) and a solid-state auxiliary breaker (230) connected in series, the series-connection of the disconnector and the auxiliary breaker being connected in parallel to the main breaker, a snubber circuit comprising a capacitor (250), and switching means (270) being arranged for disconnecting the snubber capacitor in response to the auxiliary breaker being opened. By disconnecting the snubber capacitor, an uncontrolled discharging of the capacitor through the disconnector and the main breaker, and the resulting non-zero current flowing through the disconnector during the breaking action, may be avoided. Further, a method of an HVDC hybrid circuit breaker is provided.

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