A dual-terminal asynchronous fault location algorithm is proposed for two parallel overhead lines on same pole,which eliminates the effect of asynchronous phase based on the principle that the quotient of the common positive-sequence voltage to the common positive-sequence fault voltage of one terminal is equal to that of the opposite terminal,and adopts the bisection method or the secant method to locate the fault.The results of qualitative analysis and simulation with EMTP show that,without false roots an...