广东电力
廣東電力
엄동전력
GUANGDONG ELECTRIC POWER
2015年
4期
45-50,67
,共7页
连锁跳闸%潮流转移%本地信息%自适应过负荷保护%后备保护
連鎖跳閘%潮流轉移%本地信息%自適應過負荷保護%後備保護
련쇄도갑%조류전이%본지신식%자괄응과부하보호%후비보호
intertripping%flow transferring%local information%self-adaptive overload protection%backup protection
潮流转移引起的连锁跳闸是导致世界各国大停电的重要因素之一。以潮流转移过负荷识别的结果作为触发事件,提出一种基于本地信息的自适应过负荷保护方案,根据线路不同的过负荷状态采取不同的措施:对于保护区域内的故障,后备保护应在延时结束后快速动作断路器跳闸;对于潮流转移引起的过负荷,通过测量满足实时性要求的数据估计线路承受过负荷的最大能力,修改后备保护的动作时间整定值,为安全稳定控制系统争取时间。仿真结果验证了该方案的有效性。
潮流轉移引起的連鎖跳閘是導緻世界各國大停電的重要因素之一。以潮流轉移過負荷識彆的結果作為觸髮事件,提齣一種基于本地信息的自適應過負荷保護方案,根據線路不同的過負荷狀態採取不同的措施:對于保護區域內的故障,後備保護應在延時結束後快速動作斷路器跳閘;對于潮流轉移引起的過負荷,通過測量滿足實時性要求的數據估計線路承受過負荷的最大能力,脩改後備保護的動作時間整定值,為安全穩定控製繫統爭取時間。倣真結果驗證瞭該方案的有效性。
조류전이인기적련쇄도갑시도치세계각국대정전적중요인소지일。이조류전이과부하식별적결과작위촉발사건,제출일충기우본지신식적자괄응과부하보호방안,근거선로불동적과부하상태채취불동적조시:대우보호구역내적고장,후비보호응재연시결속후쾌속동작단로기도갑;대우조류전이인기적과부하,통과측량만족실시성요구적수거고계선로승수과부하적최대능력,수개후비보호적동작시간정정치,위안전은정공제계통쟁취시간。방진결과험증료해방안적유효성。
Intertripping caused by flow transferring is an important factor to result in blackout in various countries. Taking result of overload recognition of flow transferring as triggering event,a kind of self-adaptive overload protection scheme based on local information was proposed. According to states of overloads on different lines,different measures were taken. For faults in protection zones,the backup protection should rapidly isolate the breaker tripping after time-delay finished. For overload caused by flow transferring,by measuring data evaluation line which could meet real-time requirement,it was able to bear the maximum capacity of overload,modify action time setting value of backup protection and buy time for secu-ring and stabilizing the control system. Simulation results verified effectiveness of this scheme.