Protection in distribution grid operation process is of great significance for reducing operators’ safety risk and ensuring stable operation of power system. Taking into account of protection issues during the operation in distribution grid

this paper investigates the risk warning and protection methods based on monitoring of operator movement trajectories. First

trajectory tracking and risk warning methods based on Beidou positioning in long-distance and large-range operations is proposed. Then

for complex working conditions such as substations and indoor environments

trajectory tracking based on UWB positioning and boundary risk detection based on improved YOLO v7

as well as violation behavior detection of operators are discussed. At last

effectiveness of the proposed method in comprehensive operation process of distribution grid is verified through experiments.