Active Component of Zero sequence Current based Single phase Ground Fault Location in Distribution Grid

Abstract:

In order to solve the fault section location problem of single phase to ground fault in digitalized distribution grid with arc suppression coil in parallel/series with resistance, the fault zero sequence currents measured by protection devices installed at the head ends of all sections in such distribution grid are formulated, and the general distribution regularities of the active component of zero sequence current are provided. On this basis, the zero sequence active component based single phase to ground fault section location method is proposed with the combination of general matrix algorithm for fault location in distribution grid. Moreover, the corresponding logic node and logic device is newly developed according to IEC61850, which provides reference to the device model construction of fault section location system of single phase to ground fault in compensated network. The correctness of the proposed algorithm is verified by the simulation results of several typical faults in a distribution grid model built in PSCAD/EMTDC.