Fault identification method and device for underground coal mine power supply system

The invention provides a coal mine underground power supply system fault identification method and device, and relates to the technical field of coal mine power system relay protection. The system comprises a data acquisition system, an input/output system and a microcomputer system, traditional fault identification technologies are combined, weights of different methods are adjusted through comprehensive contribution rate evaluation, and then a final identification result is obtained. According to the invention, accurate line selection of underground faults is realized, the reliability of a power supply system is improved, and great economic benefits and safety benefits are generated. 本发明提供一种煤矿井下供电系统故障辨识方法及装置，涉及煤矿电力系统继电保护技术领域。本发明系统包括数据采集系统、输入/输出系统和微型机系统；将传统故障辨识技术进行组合，通过综合贡献率评判对不同方法的权值进行调整，进而得到最终的判别结果。该发明实现了井下故障的准确选线，提高供电系统的可靠性，产生重大的经济效益和安全效益。