Abstract
A recloser is a protection device used to mitigate long power interruptions during transient faults in passive distribution systems. Passive distribution systems are becoming active because of the integration of distributed generation. This generation introduces a reverse power flow and consequently a reverse fault current. The pick-up and operation time of the recloser can be affected because of the change in the fault current level. It is essential to study and compare the recloser's pick-up activity and operation time before setting the recloser in an active distribution system. This study, therefore, develops a virtual single-shot reclosing scheme and its performance tested in a passive and active distribution system. Matlab/SimulinkiSimscape power systems environment is used to simulate cases. Simulations are conducted for four case studies to identify issues in the performance of the recloser when there is distributed generation. The results show that the fault contribution of the distributed generation causes false tripping, protection blinding, and recloser-fuse misco-ordination.
Published Version
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