Feeder automation system based on non-communication protection and control unit

The paper presents a novel feeder automation system based on non-communication protection and control unit (PCU) without the need of communication. The system can be adaptive to the changes of distribution network configuration. As a fault occurs on a feeder, Non-Communication Protection at the faulted segment's terminals will operate to isolate the faulted segment. The segments out of service will be restored power supply from back-up source after the operation of Backup Source Automatic Control. The system can achieve the aims of local protection, local control and local decision. Any Breaker in the new system only needs to operate once to clear a fault. For one feeder with 6 segments, the longest clearing time is about 1.1 seconds for asymmetrical fault and 2.3 seconds for symmetrical fault, as well as the healthy segments will be restored the service in 3.0 seconds.