Application of Topology Identification on Optimal BESS Sizing in Distribution Systems

Battery Energy Storage Systems (BESS) distributed over the Low Voltage (LV) network have been proposed as means of providing ancillary services in active distribution grids. Hence, optimal planning of BESS places and sizes is important so as to ensure economic and technical viability of such solutions. Most of the existing approaches for the optimal planning rely on previous knowledge of the network topology which, especially in low voltage networks, may not be available in practice. The paper assumes knowledge of P, Q, V measurements from smart meters placed in network leaf nodes only. At first, a topology identification algorithm is applied in order to estimate the network topology. Next, an algorithm for optimal sizing of BESS is applied on both the identified and original networks in order to assess the impact of topology identification potential errors in the planning procedure. Finally, the proposed algorithm is demonstrated on characteristic network cases.