A fault detection and service restoration method by shifting the feeder tie switch for ungrounded distribution system

This paper presents a fault detection and service restoration method for distribution automation system(DAS) in ungrounded distribution system. Fault detection and service restoration is principal function to supply high reliability power continuously in distribution system. The proposed method utilizes the turning point of fault information between connected feeders in the process of shifting the feeder tie switch. It can provide communication-based fault handling process without power supply interruption for ungrounded distribution system. This method is being studied to be implemented in DAS for field test to validate the method.