Unsynchronized fault location method based on the negative-sequence voltage magnitude for power cables of a simplified shipboard power system

This paper presents an unsynchronized fault location method using the negative-sequence circuit for unbalanced short-circuit fault occurring in power lines. The magnitudes of voltages of both ends of faulty line are used to identify the fault location. Moreover, the fault impedance is not considered in to estimate the fault location, which means that this method is independent to the fault impedance.