摘要
• 摘要: 目前国内500 kV变电站主要采用断路器作为回路投切开关，针对开断短路电流设计的断路器，在投切无功补偿设备时存在断路器寿命短，需要频繁更换的问题。介绍了在日本运行经验成熟的投切大容量无功设备的专用负荷开关，可极大延长无功回路开关的电寿命，适用无功回路的电流电压特性以及频繁投切操作的实际工况。通过对专用负荷开关的特性分析，采用BPA软件仿真分析了专用负荷开关在500 kV变电站中的应用可行性。

   

  Abstract: At present, Circuit breaker has been used as the main switch of reactive-load compensation equipment in 500 kV substation. The circuit breaker of the reactive power compensation circuit always has a short life expectancy and needs frequently replaced dued to the switching test of circuit breaker designed for connection with the short-circuit current. A specified load break switch is introduced to switch the high-capacity reactive power compensation. The load break switch is a mature technology and suitable for the actual condition with the frequent operation of reactive power circuit, so it can extremely extends the electrical life of the switches. According to the characteristic analysis of specified load break switches, BPA software is used to emulate the application feasibility of the load break switches in the 500 kV substation.

   

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