Voltage regulation in distribution network using battery storage units via distributed optimization

This paper proposes a voltage regulation method by using battery energy storage (BES) units in distribution networks with abundant solar photovoltaic (PV) resources. The proposed method utilizes sparse optimization techniques to find the optimal actions of BES with minimal involved unit numbers and minimal active power output variation. Furthermore, a distributed Lagrangian primal-dual sub-gradient (DLPDS) algorithm is applied to solve the proposed method via local decision making with limited communication with neighbors. Finally, case studies are conducted on modified 15-bus and 43-bus radial distribution system to verify the performance of proposed method.