Smart fault isolation and service restoration under consideration of abnormal conditions in distribution systems

The most important function in distribution automation system (DAS) is the service restoration. KEPCO's current service restoration provides a very effective restoration service[1]. However, it has been developed without the consideration of unexpected abnormal conditions that may occur while processing the sequence of switching operations. The objective of this paper is to provide practical service restoration schemes to support the existing one under consideration of abnormal conditions. The proposed service restoration schemes have been integrated to a branch office (B/O) in KEPCO and its current status is reported. The proposed method strongly supports the conventional service restoration and adds to its value.