摘要
近年来我国大力发展直流输电技术,由于发电厂和直流换流站断路器重合闸配合的特殊性,当发生单相接地故障时,发电厂侧断路器重合闸后,会出现断路器开断失败的问题[1]。针对某500 kV换流站中出现的断路器开断失败故障,运用电磁暂态仿真程序EMTP建立仿真模型,研究了断路器开断失败的原因。研究表明:故障发生时,流过换流站侧断路器的故障电流含有较大直流分量,影响了断路器的开断。
In recent years, DC transmission technology develops fast in our country. However as for the complex cooperation of circuit breakers in the DC converter station and the power plant, the circuit breaker reclosing at the power plant side leads to a breaking fail- ure when a single phase grounding fault occurs. This paper focuses on a circuit breaker breaking failure in a 500 kV DC converter sta- tion and found a simulation model with EMTP to research on the reason of the failure. The conclusion shows the over amplitude DC component of the circuit breaker is the main reason of the breaking failure.
出处
《东北电力技术》
2013年第8期7-10,共4页
Northeast Electric Power Technology
