Electromagnetic transient simulation modeling for the recloser and feeder terminal units in electrical distribution networks

The recloser and local feeder terminal units (FTU) are widely used in distribution networks to locate and isolate faults. The operation and maintenance staff lack knowledge about the operating principle of FTUs and the tools to analyze the recorded voltage and current signals. In this paper, the overcurrent protection module, under-voltage protection module, and other logical modules are integrated to construct the recloser model and local FTU models. The coordination of the recloser and local FTU s are simulated and verified by the electromagnetic transient simulation in one typical distribution feeder with three sections and laterals. The developed models can be used in the courses for training skilled staff in distribution automation system operation.