一种基于FTU的配电网故障定位方法

onsidering the wide application of FTU in feeder automation system, a FTU-based fault location method is proposed in this paper. Firstly, the FTU state vector is formed according to the fault information reported by the FTU, and the simulated fault current vector is calculated by combining the correlation matrix reflecting the topology of the distribution network and the fault section can be located. Then, the voltage at both ends of the fault section measured by the FTUs are substituted into the fault location equation derived from the impedance method to calculate the distance from the beginning of the fault point to the fault location. The algorithm completes the fault section location and fault point location by FTU remote telemetry and telemetry information. It not only can quickly isolate the faulty segment and restore the power supply in the non-fault area, but also locate faults on the basis of known fault section, which can avoid the traditional ranging method of false fault point problem. Finally, simulation of the actual situation of the distribution network are carried out in IEEE34 test feeder system to verify the effectiveness of the method.