Coordinated control of multi-functional battery energy storage system in an unbalanced network

Yearly investment to upgrade a distribution network has always been a key issue for a distribution network operator (DNO). Besides, new operational challenges are introduced to DNOs due to increasing photovoltaic (PV) generation. A high penetration of PV may cause voltage rise problem in a distribution network. This paper proposes a coordinated control strategy of Battery Energy Storage System (BESS). BESS is facilitated with centralized and decentralized control. A rule based control approach is used. BESS is utilized to concurrently achieve three purposes, namely, peak shaving, load levelling and mitigation of voltage rise problem in a PV integrated network. The proposed control scheme is applied in an IEEE-37 bus test system in MATLAB/Simulink environment. A comparative study based on different locations of BESS is also carried out in this paper. Daily demand profile of an Australian residential network is considered. Solar insolation data of a typical summer day of the University of Queensland is taken into account for PV modelling. It is observed that the proposed control strategy obtains satisfactory outcomes.