摘要
分析了一座110 kV智能变电站在母线电压互感器PT及一条110 kV线路转检修过程中,110 kV备自投装置动作后,未合上备用线路开关,造成全站短时失压的事故。通过对现场备自投装置动作报文、开入量SOE变位及监控后台报文分析,并查阅该110 kV备自投装置说明书,得到备自投装置在联切线路转检修时逻辑存在问题——联切线路的跳位取的是操作箱的TWJ,断开操作电源时TWJ复归。根据影响110 kV备自投正确动作的不同原因提出:一是增加联切线路检修时对应的线路相对应的检修开入压板;二是110 kV进线备自投的两条互备线路及母线PT,三者其中之一转检修,也同时将备自投装置退出,以防备自投装置误动。
In this paper,analysis an 110 kV smart substation in the bus voltage transformer PT and an 110 kV line in the process of overhaul,after the 110 kV reserve power source automatic connection devices(RPSACDs)is activated,the backup line switch is not closed,causing a short-term voltage loss of the whole station.By analyzing the operation messages of the on-site RPSACDs,the position of the input SOE and monitoring the background message,and consulting the 110 kV RPSACDs manual,it is found that the RPSACDs has logic problems when the combined switching line is transferred for maintenance——The jump position of the combined circuit is the TWJ of the operation box,and the TWJ will reset when the operating power is disconnected.According to the different reasons that affect the correct operation of 110 kV standby automatic switching,the following is proposed:First,increase the maintenance opening of the corresponding line during the maintenance of the combined line;the second is the two mutual backup lines and busbar PT of 110 kV incoming line and automatic switching.One of the three is transferred to overhaul,and the automatic RPSACDs is also withdrawn to prevent the RPSACDs from malfunctioning.
作者
吴勇海
WU Yong-hai(Longyan Power Supply Company,State Grid Fujian Electric Power Company,Longyan 364000,China)
出处
《电工电气》
2020年第11期49-52,共4页
Electrotechnics Electric
关键词
智能变电站
备自投装置
误动
改进措施
smart substation
reserve power source automatic connection devices
incorrect operation
improvement measures
