摘要
通过一起并列运行双回线其中一回线路瞬时故障保护装置跳闸重合闸动作前稳控装置已动作切机的案例,分析了110 kV并列运行双回线线路保护装置中距离Ⅲ段动作时间、重合闸动作时间与110 kV电站稳控装置切机动作时间失配的原因,总结了三者之间配合的基本原则;根据电网的实际运行情况,提出通过优化110 kV线路保护距离Ⅲ段动作时间、线路两侧重合闸动作时间来确保与稳控装置动作切机时间配合的解决方案,以避免重复发生线路瞬时故障重合闸动作之前稳控装置先行切机的类似事件,保证了机组发电的连续性及电网供电的可靠性,消除了110 kV并列运行双回线线路保护装置与110 kV电站稳控装置时间定值失配带来的不良影响。
Through a case analysis of parallel operation of double lines one circuit transient fault protection device stability control device, analyzed the reasons of 110 kV parallel operation of double circuit line protectsegment movement time,reclosing time and 110 kV power stability control device and cutting machine movement time mismatch, thebasic principles of cooperation between the three are summarized. According to the actual situation of the power system, put forward a solution by optimizing the 110 kVline protection distance ＂ segment movement time, on both sides of the line reclosing time and to ensure the stability control devices and cutting machine with time, in order to avoid similar incidenreclosing the first movement stability control device and cutting machine, to ensure the reliability and continuity of power generatingunits, eliminate the adverse effects of the parallel operation of double 110 kVline protector and the stability control device of the 110 kVpower station time fixed value mismatch.
作者
刘匀
LIU Yun(Duyun Power Supply Bureau of Guizhou Power Grid Co. ,Ltd. ,Duyun 558000 Guizhou,Chin)
出处
《电力大数据》
2018年第4期77-81,共5页
Power Systems and Big Data
关键词
保护定值
稳控定值
失配优化方案
protection fixed value
steady control fixed value
mismatch optimization scheme
