基于邻近线路行波监测的故障定位方法研究

Research on Traveling Wave Fault Location Method Based on Series Transmission of Adjacent Lines

以输电线路分布式监测技术为基础,将双端行波定位的应用范围从本线路延申至同电压等级的相邻线路,以拓展双端定位的途径。首先,分析了行波信号在相邻及同塔多回线路之间串入式传播的衰变规律,提出以串入式行波信号进行双端定位的方法,指明了其应用条件;其次,在某地区电网选取典型输电线路进行实例验证,分析比对了串入式行波双端定位的误差。结果表明,在串入途径选取合适时,串入式行波的定位方法仍具有较高的定位精度。

Based on the distributed monitoring technology of transmission lines, the application range of double terminal traveling wave location is extended to the adjacent lines with the same voltage level, so as to expand the path of double terminal traveling wave location. Firstly, the decay law of traveling wave signal in series transmission between adjacent lines and common-tower transmission lines is analyzed, and the method of double terminal location based on series traveling wave signals is proposed, and its application conditions are pointed out in this paper. Secondly, the typical transmission lines are selected in a certain area power grid for example verification, and the error of double terminal location based on series traveling wave is analyzed and compared. The results show that the location method of the series traveling wave still has a high accuracy when the series approach is selected properly.