Based on the characteristics of negative sequence current,experimental research was conducted on the disconnection fault of 10 kV distribution network.By collecting,analyzing,and comparing negative sequence current data under single-phase disconnection fault and one side grounding fault,the differences in current characteristics of different types of faults were explored.Furthermore,the correlation between negative sequence current phase difference and amplitude and normal transmission lines was utilized to establish a fault identification model and algorithm,and its effectiveness in practical applications was explored.The results show that based on the phase difference and amplitude difference of the negative sequence current,single-phase ungrounded faults and one side grounded faults can be effectively distinguished.Through the correlation between the negative sequence current characteristics and normal lines,rapid fault location can be achieved.
关键词
10/kV配电网/负序电流/故障选线/区段定位
Key words
10 kV distribution network/negative sequence current/fault routing/zone positioning
万方数据