The Research and Application of Intelligent Distributed Feeder Automation in Overhead Line

Abstract

In order to overcome the disadvantage of voltage- time type feeder automation in overhead line, such as long fault processing time and multiple power grid impulse, a modification scheme of intelligent distributed feeder automation based on intelligent terminal is proposed in this paper. By using the wireless communication channel to realize the fast exchange between the two adjacent terminal, the scheme locates, isolates the fault point and recovers the power supply of non-fault areas in-situ according to the principle that the terminal on one side of the fault position can detect the fault current while the terminal on the other side of the fault position cannot detect the fault current, which can shorten the fault disposing time and reduce the switch operation times. Meanwhile, when in case of communication failure, the automation mode can adaptively switch to the original voltage-time feeder automation. The modification scheme propose in this paper has been successfully implemented on overhead lines in Zhuhai area, which will improve the reliability of power supply of overhead line.