Scalable Peer-to-Peer Energy Trading System With Microgrid Coalitions

Widespread deployment of distributed renewable energy sources fosters the research and development of peer-topeer (P2P) energy trading systems. Despite the benefits this energy-sharing paradigm can bring to the stakeholders in modern energy systems, how to effectively facilitate energy trading among a large number of energy prosumers (producers-and-consumers) remains a non-trivial challenge. This paper proposes a new P2P energy trading system to support energy trading among prosumers located in geographically distributed microgrids. Backboned by a clustering mechanism that dynamically organizes the microgrids into multiple coalitions, the system can enable energy trading within a microgrid and among different microgrids, making it scalable to cater for the energy trading needs of widearea prosumers. Numerical simulation is conducted on an IEEE 33-bus benchmark distribution system to validate the proposed method.