关键词: 故障定位, 　输电线路, 　分布参数, 　单端测量, 　电力系统

Abstract: A single terminal fault location method for overhead transmission lines in general interconnected power system with n⁃bus was proposed. High accuracy in fault location was achieved by using both an accurate distributed parameters model for the faulted transmission line, and a two⁃bus Thevenin equivalent network model for the power system that accurately accounted for its inter connectivity. The method was tested by using transient fault data obtained from MATLAB simulations of an 11⁃bus interconnected power system. The results show that the method is capable of estimating the fault distance with high accuracy for various fault conditions. And it is sensitive to errors in the value of the local bus impedance, but insensitive to errors in the value of the remote bus impedance.

Key words: Fault location, Transmission lines, Distributed parameters, One?terminal measurements, Power system