摘要
超高压输电线路发生故障时,线路上的串补电容及其保护回路都将在故障时产生附加的暂态分量。为此,分析了串补线路故障时暂态电流特征,在得出串补对高频暂态电流影响较小的结论后,利用改进递归小波对故障时各相的高频电流能量进行分析,通过比较能量来识别故障类型和判别故障相别。大量ATP(thea lternative trans ien ts program)仿真实验以及实际录波数据验证表明,该算法在不同故障条件下(不同故障位置和初始角等)都能正确选出故障相。
When fault occurs on the extra high voltage （EHV）transmission lines ,series capacitor compensation and its protection on the lines can cause additional transient component. A conclusion is drawn that series capacitor has very small influence on the high frequency transient current, which is based on the analysis of the characteristics of transient current at fault lines. Then the fault type as well as the faulty phases is identified by comparing the high frequency energy component based on the improved recursive wavelet transform. A large number of alternative transients program （ATP）simulations indicate that the proposed algorithm can select faulty phases correctly at various conditions.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2007年第5期105-109,共5页
Proceedings of the CSU-EPSA
关键词
串补输电线路
超高压
改进递归小波变换
暂态能量
故障选相
交流暂态程序
series compensated transmission lines
extra high voltage （EHV）
improved recursive wavelet transform
transient energy
fault phase selection
alternative transients program（ATP）
作者简介
王晓东（1981-），男，硕士，主要从事电力系统继电保护研究。Email：wangxiaodong@sjtu．edu．cn
邰能灵（1972-），男，博士，副教授，主要从事电力系统继电保护，电力系统安全稳定控制的研究工作。Email：lifeiseasy@163．net
