电气技术
電氣技術
전기기술
ELECTRICAL ENGINEERING
2011年
10期
67-68,83
,共3页
行波%小波变换%相模变换%故障选相
行波%小波變換%相模變換%故障選相
행파%소파변환%상모변환%고장선상
traveling wave%wavelet transform%phase-mode transformation%the fault phase-selection
本文研究了输电线路接地故障时的故障选相判据。发现由于零模在大地和三相导线之间形成回路,受大地电阻率等因素影响,其衰减特性与线模分量不一致,使用现有的判据进行选相可能会发生误判。本文提出了通过比较各模量小波变换模极大值关系进而进行相别判断的方法,判据关系式只使用线模分量,消除了零模分量的影响。通过仿真,验证了改进判据的正确性。
本文研究瞭輸電線路接地故障時的故障選相判據。髮現由于零模在大地和三相導線之間形成迴路,受大地電阻率等因素影響,其衰減特性與線模分量不一緻,使用現有的判據進行選相可能會髮生誤判。本文提齣瞭通過比較各模量小波變換模極大值關繫進而進行相彆判斷的方法,判據關繫式隻使用線模分量,消除瞭零模分量的影響。通過倣真,驗證瞭改進判據的正確性。
본문연구료수전선로접지고장시적고장선상판거。발현유우령모재대지화삼상도선지간형성회로,수대지전조솔등인소영향,기쇠감특성여선모분량불일치,사용현유적판거진행선상가능회발생오판。본문제출료통과비교각모량소파변환모겁대치관계진이진행상별판단적방법,판거관계식지사용선모분량,소제료령모분량적영향。통과방진,험증료개진판거적정학성。
This paper studied the transmission lines when earthing fault phase selection criterion.Found in the land and because zero mode formed between three-phase wire loop and by the resistivity and other factors,the attenuation characteristics and line mode weight not consistent,use existing obtained may occur phase-selection miscalculation.This paper puts forward through comparing various modulus wavelet modulus maxima relations and then judge method,is don't use only criterion equation of mould component,eliminating the line.The influence of zero mould component through the simulation,the correctness of verified criterion.