摘要
超高压线路故障产生的周期性高频暂态分量在频域上表现为一系列谐波形式,在分析暂态频率特征的基础上,提出了一种基于暂态分量的单端故障测距方案,并分析了电源侧和故障点反射系数对测距结果的影响,针对实际应用中存在的若干问题给出了相应的对策。该方案计算简单,不受故障时刻、运行方式等因素的影响,ATP仿真和M atlab分析验证了该方案有效性。
When a fault occurs in a transmission line,the fault-generated high-frequency components are a series of natural frequencies in frequency domain.Firstly,the natural frequency characteristics of extra high voltage transmission line are analyzed,and then a fault location scheme based on natural frequency is proposed,the effect of reflection coefficients on the source and the fault point are also discussed,finally some solutions are proposed against several problems in practical application.The scheme avoids identifying arrival time of traveling waves and reflecting traveling waves from fault point,it is immune to fault time and operation mode et al.The performance of the proposed scheme is verified by various faults on ATP simulation and Matlab.
出处
《四川电力技术》
2010年第4期48-52,共5页
Sichuan Electric Power Technology
关键词
电力系统
固有频率
频谱分析
故障测距
power system
natural frequency
spectrum analysis
fault location
