Charging coordination of aggregated electrical vehicles for load variance minimization in distribution system

The increased penetration of PHEVs severely affect the day to day operations of the distribution systems. Load congestion, voltage unbalance, voltage stability and overloading of the transformers are some of the issues that need to be managed during charging and discharging of the PHEVs. In this paper, coordinated charging for load variance reduction is proposed to mitigate some of the issues mentioned earlier. The simple linear optimization model is adopted and applied to distribution system. The outcome of the optimization produces proper charging profile of PHEV that has potential to reduce burden on the grid because of the PHEVs integration. Modified IEEE 13 node test feeder is utilized as a test system that shows the improvements in the voltage profile.