Voltage control strategy in distribution system with energy storage and distributed generations

Voltage control in the distribution system is becoming very challenging due to the enhanced number of control variables and the increasing penetration of distribution generations (e.g. photo-voltaic arrays). There is a need for new voltage control strategy considering fast control and four-quadrant operation of energy storage system in presence of the traditional voltage control devices like capacitor banks and transformer tap changers. In this paper, a sensitivity-based voltage control strategy is developed for the energy storage system and validated using an industrial feeder in the Northwest Washington. As demonstrated through the simulation results, the proposed control strategy contributes to the voltage profile improvement with varying load conditions and different levels of photo-voltaic penetration.