500 kV HGIS设备在二次设计中须注意的问题

广东电网500kV横沥变电站是国内首次运用进口500 kV HGIS设备的变电站。500 kV HGIS内所有的断路器、隔离开关、接地开关等设备间不但有良好的机械联锁，还配有电气联锁，但与HGIS相连的有关二次设备的闭锁逻辑关系，则需要进行相关的设计来完善。为此，以该变电站应用500 kV HGIS的实际情况为例，分析在进行二次设计中需要注意的问题，为今后的设计工作提供借鉴作用。

Points for attention in secondary design of 500 kV HGIS

kV Hengli Substation in Guangdong power grid is the first substation in China applying imported 500 kV hybrid gas insulation switchgear(HGIS),which is equipped with not only reliable mechanical interlock but also electric interlock for all of its circuit breakers,disconnectors, earthing switches, etc. The blocking logic of the secondary equipment connected with HGIS,however,should be improved in design.Taking the application of 500 kV HGIS in Hengli Substation for example,this paper analyzes the points for attention in secondary design of HGIS,so as to provide reference to future design.