The article first analyzes the role, composition, requirements of relay protection, and then analyzes the fault analysis of power system protection and treatment measures; the final analyzes the question of the relay protection substation operation. In this paper, the main electric wiring mode of 110kV substation is selected, the structure of substation is determined, and then the main wiring diagram is drawn. 4-11) Issue Topic: “Advanced Energy and Industrial IoT Reliability Supporting of Relay Protection for 110kV Transmission Line with High-load and Short-distance in a Ring Network Embedded Self Organizing Systems (Vol 10. 4-11). As part of its mandate to meet the increasing electricity demands of Ulaanbaatar while ensuring uninterrupted, reliable, and high-quality energy supply, the National Power Transmission Grid (NPTG) takes on the responsibility of expanding, revamping, and maintaining power transmission. With the development of the power industry, people's demand for electricity is growing, there is a contradiction between the current power resources and user demand for electricity, the main reason is that the substation operation there are some problems, causing power resources hard work.