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Long, lightly loaded feeders serving residential loads may begin toexperience voltage excursions as plug-in electric vehicle (PEV) penetrationincreases. Residential PEV charging tends to occur during peak-load hours onresidential feeders, leading to increased peak loads and potential voltageexcursions. To avoid voltage excursions, two PEV charging control strategieswere investigated using the IEEE 34-bus feeder. The first strategy shifts PEVcharging energy from peak hours to off-peak hours; the other strategy allowsPEVs to provide reactive power support. Undervoltage excursions seen in asimulation of uncontrolled charging of 200 PEVs were improved dramatically whenthese two control strategies were used. The minimum voltage on the feederimproved from 0.855 pu when PEV charging was uncontrolled to 0.959 pu when bothcontrol strategies were applied together.

Strategies to Maintain Voltage on Long, Lightly Loaded Feeders with Widespread Residential Level 2 Plug-in Electric Vehicle Charging