Wireless Monitoring System Design for High Voltage Bushing in Power Substation

To overcome the problems of long period and inaccuracy of fixed-cycle power outage maintenance of bushing, the on-line monitoring system of high-voltage bushing is discussed, and a designed scheme of on-line monitoring device for bushing end shield is given, to ensure the timely detection of insulation defects of bushing equipment, which is of great significance to ensure the safe operation of power system. The structure of on-line monitoring unit and software flow in the monitoring system are introduced, and the local signal conditioning circuit, the highspeed acquisition circuit and the power supply circuit are designed on the basis of the on-line monitoring system structure. At last, the stability, effectiveness, and accuracy of the on-line monitoring system are proved by test experiment.