Fault location of active network based on the phase angle comparison of fault currents

A new fault location method for distribution automation of active network is presented. It compares the phase angle of fault currents at both ends of a feeder section when the fault current contribution of downstream distributed generation also exceeds overcurrent setting. The measurement of phase angle is synchronized by the fault itself, and the fault is detected by comparing the current deviation with a threshold. Digital simulation and laboratory test results proved the feasibility of the proposed method.