Hierarchical decomposition based distributed energy management of distribution networks

Abstract

With the proliferation of distributed generators (DGs), electric vehicles (EVs) and distributed energy storage systems (DESs), the distribution system operator (DSO) is facing a great challenge in energy management. This paper proposes a layered and distributed control framework to address the optimal operation problem of distribution networks. We first introduce a ‘DSO-aggregator-end users’ architecture and formulate the corresponding optimization problem, where DSO communicates with aggregators and each aggregator interacts with its distributed end users, e.g., EVs and residential loads. Then, a layered and distributed algorithm based on dual decomposition is proposed, which divides the original problem into subproblems to be solved by agents in different layers. In this way, the computation and communication burden is relieved, and users' privacy is preserved. Finally, the IEEE 33-bus distribution system is utilized to verify the effectiveness of the proposed method.