顾大德,肖健,韦梦立,张博文.含逆变型分布式电源的花瓣型配电网故障定位策略研究[J].电测与仪表,2023,60(11):53-59. gudade,xiaojian,Wei Mengli,Zhang Bowen.Research on fault location strategy for petal-shaped distribution network with inverter-interfaced distributed generators[J].Electrical Measurement & Instrumentation,2023,60(11):53-59.
含逆变型分布式电源的花瓣型配电网故障定位策略研究
Research on fault location strategy for petal-shaped distribution network with inverter-interfaced distributed generators
In order to solve the fault location problem of the petal-shaped distribution network with inverters，a comprehensive fault location method based on electrical parameters is proposed，which can be used to solve three types of faults。Firstly，a fault line identification method based on negative sequence current phase difference is proposed for two-phase short circuit faults。Secondly，a distance measurement equation is derived based on zero-sequence components for single-phase grounding faults，and the true fault location is determined by constraining the section line length to exclude false roots。Thirdly，the fault location for symmetrical faults is determined using the phase and amplitude of multiple-line positive sequence currents。Finally，the proposed method is tested for different fault types and ground resistances in the PSCAD/EMTDC system。The results show that the proposed method has higher location accuracy compared to other methods，and the location error does not exceed1%for different fault types，thus verifying the method’s superior accuracy and fault tolerance in the petal-shaped distribution network with distributed generation.
