Executive SummaryTo explore the technology of power monitoring systems for unmanned substation operations underground, this article, taking the Malan Coal Mine of Xishan Coal and Electricity as a backdrop, elaborates on the basic parameters of the power monitoring system technology for unmanned substation operations underground, such as the rated working voltage and total apparent power input of the unit, the transmission ports of switches or monitoring stations, the transmission ports of high-voltage distribution equipment, and the transmission ports of vacuum feeder switches.RS485Light signal transmission ports, alarm volume, video signal input ports, backup battery parameters, analog transmission processing errors, etc. The study shows that this system provides various protection, monitoring, and control functions for the underground power supply system, and transmits reliable communication signals to the ground dispatch center, allowing on-duty personnel to have a detailed understanding of the underground power grid's operation. The system performs well at the Malan Mine, effectively ensuring the power supply safety and reliability of the underground power supply system, and bringing significant economic and social benefits to the Malan Mine. The system has a very broad application prospect.

KeywordsUnderground; Unmanned Substation; Power Automation; Monitoring System