110kV变电站站用系统故障分析及改进措施

Analysis and improvement of standby system failure in 110 kV substation

针对一起110 k V变电站站用系统电源切换主接触器的故障,对其进行原因分析,发现变电站站用系统存在线路老化,切换不可靠,维护工作量大等问题。通过采用双电源自动切换开关装置对现有的站用系统进行改造。结果表明:双电源自动切换开关装置不仅简化了线路,消除了站用系统的安全隐患,而且确保了站用系统安全、可靠运行。

Aiming at the failure of standby power switching over the main contactor in110kV substation,analyzes the causes and discovers the problems such as the transmission line ageing,the switch unreliable and the maintenance work loads heavy.By the use of duplicate supply automatic throw-over switch devices improves the current standby power system.The results show that duplicate supply automatic throw-over switch devices not only simplify the line,eliminate the hidden safety trouble of the standby power system,but also ensure the safe and reliable operation of the standby power system.