Impacts of Plug-in Electric Vehicles on local distribution feeders

This study investigates the impacts of Plug-in Electric Vehicles (PEV) on end-service local distribution feeders. The results show that the PEV charging depresses the feeder voltages significantly and increase the feeder power losses up to 16.7 times. The voltage stress is more profound at the end of the feeder or at the point where many PEV are connected. The most noticeable impact of the PEV is that they can prohibit the customer motor-based appliances normal operation where the motors may either stall or trip offline. Furthermore, dynamic simulation suggests that PEV switching slows down the load power step-up and causes reactive power oscillation.