Optimal Allocation and Operation Strategies of Distributed Vanadium Redox Battery Energy Storage System

This paper presented an optimal allocation of distributed vanadium redox battery (VRB) energy storage system (ESS) in active distribution networks (ADNs). Correspondingly, an optimal method of distributed VRB ESS determining the rated power, rated capacity and operation strategies is proposed. Firstly, according to the different operation requirements, several corresponding operation strategies are proposed, also the operation process and constraints of the ESS unit are analyzed. Then, an operation benefit model of the ADNs is constructed, and the operation status of the ADNs allocated with the distributed VRB ESS is intuitively represented by the economic benefit. Finally, the proposed optimal allocation method of distributed VRB ESS considering multiple operation strategies is tested with an experimental case, which verifies the correctness and rationality of the proposed optimal allocation method. The results show that the operation benefits of the ADNs can be increased by 32% by determining the optimal allocation and appropriate operation strategy proposed in this paper.