Distributed Dispatch for Local Energy Communities Based on Alternating Direction Method of Multipliers

As the penetrations of distributed generation (DG) and power electronics increase, the distribution network is evolving from a hierarchical structure to a distributed structure, which poses a major challenge to system operations. This paper proposes a distributed energy management method for local energy communities (LECs) to coordinate a large number of DGs and controllable devices to guarantee economic and secure operations in the power market environment. First, the second-order cone relaxation is performed to transform the original model into a convex model, and thereby the networked LECs are decomposed into several sub-systems. Then, alternating direction multiplier method (ADMM) is invoked to implement the energy management of LECs in a distributed fashion. Finally, case studies are conducted on the modified IEEE 33-node test system to validate the effectiveness of the proposed model and algorithm.