电力系统自动化
電力繫統自動化
전력계통자동화
Automation of Electric Power Systems
2015年
22期
152-156,163
,共6页
陈旭%朱永利%郭小红%高艳丰%赵磊%赵雪松
陳旭%硃永利%郭小紅%高豔豐%趙磊%趙雪鬆
진욱%주영리%곽소홍%고염봉%조뢰%조설송
双端不同步数据%故障测距%伪根%高压输电线路
雙耑不同步數據%故障測距%偽根%高壓輸電線路
쌍단불동보수거%고장측거%위근%고압수전선로
two-terminal unsynchronized data%fault location%false roots%high voltage transmission line
现有的大部分双端数据不同步测距算法由于伪根的存在可能导致测距失败。针对这一不足,基于线路分布参数模型,利用电压正序分量与负序分量的比值或者电压正序分量与故障正序分量的比值消除不同步角,并利用相位的单调性进而推出一种双端非同步故障测距算法。该算法不存在伪根,可以利用二分区间求根法或者弦截求根法快速求取故障距离。EMTP 仿真结果表明,该算法测距精度不受过渡电阻、故障类型以及不同步角的影响,计算量小,测距精度高。
現有的大部分雙耑數據不同步測距算法由于偽根的存在可能導緻測距失敗。針對這一不足,基于線路分佈參數模型,利用電壓正序分量與負序分量的比值或者電壓正序分量與故障正序分量的比值消除不同步角,併利用相位的單調性進而推齣一種雙耑非同步故障測距算法。該算法不存在偽根,可以利用二分區間求根法或者絃截求根法快速求取故障距離。EMTP 倣真結果錶明,該算法測距精度不受過渡電阻、故障類型以及不同步角的影響,計算量小,測距精度高。
현유적대부분쌍단수거불동보측거산법유우위근적존재가능도치측거실패。침대저일불족,기우선로분포삼수모형,이용전압정서분량여부서분량적비치혹자전압정서분량여고장정서분량적비치소제불동보각,병이용상위적단조성진이추출일충쌍단비동보고장측거산법。해산법불존재위근,가이이용이분구간구근법혹자현절구근법쾌속구취고장거리。EMTP 방진결과표명,해산법측거정도불수과도전조、고장류형이급불동보각적영향,계산량소,측거정도고。
The current algorithms of unsynchronized two-terminal fault location may lead to failure to locate the fault because of the false root.To overcome the defect,a new two-terminal fault location algorithm is proposed.Based on a distributed parameter model for the power transmission line,this paper uses the ratio of positive to negative sequence component of voltage or the ratio of voltage positive and fault positive sequence component to eliminate the asynchronous angle and then proposes a new algorithm of two-terminal fault location with asynchronous data based on the monotonicity of the phase.The algorithm without the false roots and the bisection method or secant method can be used to find out the fault position quickly.The EMTP simulation results show that this method is hardly affected by transition resistance,fault type and the asynchronous angle.The computation amount is small and the ranging precision high.