基于超高压线路参数估计的故障测距算法研究Research on Fault Location Algorithm Based on EHV Transmission Line Parameter Estimation
宋艳,曾铁军,于旭东
SONG Yan,ZENG Tie-jun,YU Xu-dong(State Grid Electric Power Research Institute
摘要(Abstract)：
提出一种基于线路参数估计的故障测距二分法。该方法基于线路分布参数模型,无需获得准确的线路阻抗参数,根据正序故障分量电压沿线分布规律,用二分法通过搜索迭代求取故障距离。这一方法理论上不受故障过渡电阻的影响,不必判断故障相别。MATLAB仿真结果表明此算法具有较高的测距精度。
Based on the distributed parameter model of power transmission line,a dichotomy algorithm for fault location is proposed in which the accurate value of the line parameters does not need to be known.According to the distribution regularity of positive sequence voltage along the transmission line and applying search method,it determines accurately the distance of fault point.In theory this algorithm is not affected by fault resistance and does not need fault phase identification.MATLAB simulation results show that the algorithm has high accuracy.
关键词(KeyWords)：
故障测距;分布参数;参数估计;二分法
fault location;distributed parameter;line parameter estimation;dichotomy algorithm
基金项目(Foundation):
作者(Author):
宋艳,曾铁军,于旭东
SONG Yan,ZENG Tie-jun,YU Xu-dong(State Grid Electric Power Research Institute
DOI: 10.19585/j.zjdl.2010.03.002
参考文献(References)：
- 葛耀中.新型继电保护和故障测距的原理与技术[M].西安:西安交通大学出版社,2007.
- MICHAEL BLAHA,WILLIAM PREMERLANI.面向对象的建模与设计在数据库中的应用[M].北京:北京理工大学出版社,2001.
- 崔静安,王安定.一种采用双端电气量的新型故障测距算法[J].电网技术,1996,20(12):17-19.
- 董新洲,葛耀中.一种使用两端电气量的高压输电线路的故障测距算法[J].电力系统自动化,1995,19(8):47-53.
- SACHDEV M S,AGARWAL R.A technique for estimat-ing transmission line fault locations from digital impedan-ce relay measurements[J].IEEE Trans on Power Deliv-ery,1988(1):121-129.
- DAMIR N,DIVID G H.Unsynchronize two-terminal fault location estimation[J].IEEE Trans On Power Delivery,1996,11(1):130-136.
- 梁军,孟昭勇,车仁飞,等.精确双端故障测距新算法[J].电力系统自动化,1997,21(9):24-27.
- 腾林,刘万顺,李营,等.一种实用的新型高压输电线路故障双端测距精确算法[J].电力系统自动化,2001,25(18):24-27.
- 哈恒旭,张保会,吕志来.高压输电线路单端测距新原理探讨[J].中国电机工程学报,2003,23(2):42-45,49.