带小电源的变电站全站失压解决方案

Solutions to Loss of Voltage in Entire Substation with Small Power Source

针对广东电网110kV变电站接有上网小电源,易因系统电源线路事故跳闸而导致全站失压的现象,通过对带小电源的110kV禄步变电站全站失压原因分析,提出了配合检母线无压重合闸增设低频低压减载装置和联切小电源两个解决方案,禄步变电站采用方案一后再未发生跳闸事故。

In view of the fact that 110 kV substations with small power source in Guangdong power grid easily suffer entire substation no-voltage due to emergency trip of the system power supply line. an analysis is made of the cause of such fault in 110 kW Lubu Substation. Two solutions are presented, i.e., adding low-frequency/voltage load-shedding device in coordination with reclosing at bus no-voltage and intertripping small power source. Since the adoption of the first solution. not a single trip fault has occurred in Lubu Substation.