Short-circuit Current Characteristics of Distributed Power and Fault Location Method after Distributed Power is Connected

摘要

With the increasing penetration of distributed power sources, the fault location of distribution networks after short-circuit faults becomes more complicated. Therefore, it is of great significance to study the fault location methods after the access of distributed power sources. This paper proposes a new fault location algorithm for distribution networks based on the abrupt current direction. The fault location is determined based on the abrupt direction of the short circuit current and the magnitude of the short circuit current. The matrix algorithm is used to locate the fault, and direction of the short circuit current of detection terminal in the network is taken as the research object. Based on the directivity of the distribution network, the continuity and directivity of the fault overcurrent are combined to determine the fault location.