Hierarchical Bipartite Graph Matching Method for Transactive V2V Power Exchange in Distribution Power System

摘要

In this paper, a hierarchical bipartite graph (HBG) matching method is proposed to promote transactive vehicle-to-vehicle (V2V) power exchanges in a distribution power system. A distribution system which includes EVs is divided into a series of subsystems according to EV locations, where V2V power exchanges are optimized for scheduling charging/discharging periods among transacting EVs in each subsystem. Each subsystem’s power surplus or deficit will then be regulated by power exchanges among neighboring subsystems and the utility grid. The one-to-multiple and multiple-to-one modes are adopted in the proposed HBG algorithm for the promotion of transactive V2V power exchanges. Also, individual EV’s electricity trading price can track that of the subsystem by adjusting respective power exchange objectives adaptively. Several case studies are presented to validate the effectiveness of the proposed method, where transactive V2V power exchanges are improved and the energy efficiency in a distribution power system is enhanced.