Monitoring technology of scattered current in transmission line tower

In order to work out the accident caused by the impact or frequent current into the ground on person or equipment near the substation when transmission line tower is short-circuited, the technology of multi-point monitoring to scattered current in the ground were studied in this paper. And then the method is verified by simulation and experiment. At the same time, the scattered current of not monitored points can be calculated by the data obtained. The key technology of monitoring is to use the Rogowski coil to capture the current and eliminate the interference of external environment. A large number of experiments show that the scattered current monitoring system is effective and reliable for the on-line monitoring; it can real-time record and monitor multi-point current waveform and use host computer to handle and analyze; the risk assessment software is designed to protect the safety of people and prevent in advance. The research on the monitoring method is helpful to the development of the current measurement and monitoring technology of the transmission line tower, which can effectively control the safety accidents of person and equipment in the power grid.