电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2009年
19期
71-76
,共6页
孙波%薛永端%孙同景%徐丙垠%王涛%纪恩庆
孫波%薛永耑%孫同景%徐丙垠%王濤%紀恩慶
손파%설영단%손동경%서병은%왕도%기은경
架空线路%小电流接地故障%故障定位%电场%磁场%Hilbert变换
架空線路%小電流接地故障%故障定位%電場%磁場%Hilbert變換
가공선로%소전류접지고장%고장정위%전장%자장%Hilbert변환
overhead line%non-solidly earthed fault%fault locating%electric field%magnetic field%Hilbert transform
提出一种利用暂态电磁场信号实现架空线路小电流接地故障定位的新方法.详细分析了线路下方不同方向电磁场的特征,提出利用特征频段内垂直电场的Hilbert变换与水平磁场的乘积计算故障方向,根据故障点前后故障方向的不同确定故障区段.阐述了所述方法的若干性能与抗干扰措施,最后通过仿真和试验验证了该方法的正确性.
提齣一種利用暫態電磁場信號實現架空線路小電流接地故障定位的新方法.詳細分析瞭線路下方不同方嚮電磁場的特徵,提齣利用特徵頻段內垂直電場的Hilbert變換與水平磁場的乘積計算故障方嚮,根據故障點前後故障方嚮的不同確定故障區段.闡述瞭所述方法的若榦性能與抗榦擾措施,最後通過倣真和試驗驗證瞭該方法的正確性.
제출일충이용잠태전자장신호실현가공선로소전류접지고장정위적신방법.상세분석료선로하방불동방향전자장적특정,제출이용특정빈단내수직전장적Hilbert변환여수평자장적승적계산고장방향,근거고장점전후고장방향적불동학정고장구단.천술료소술방법적약간성능여항간우조시,최후통과방진화시험험증료해방법적정학성.
A new approach using transient electromagnetic field signal for earth fault locating in non-solidly earthed overhead lines is presented.The characteristics of electromagnetic field in different directions under lines are analyzed in detail.Also,the product of vertical electric field after Hilbert transformation and horizontal magnetic field in SFB is determined the direction of the fault.The earth fault can be located in accordance with the difference of fault directions before and after fault.Some performance of the proposed method and the anti-interference measures adopted are introduced. Finally, experiment and simulation results verify the feasibility of this approach.
