Community Market Based Energy Trading Among Interconnected Microgrids With Adjustable Power

Abstract

Interconnected microgrids (MGs) system is regarded as one of the future power system configurations, where individual MGs can support each other through interchanging energy. This paper presents a community market structure to manage the energy trading among MGs and also with the main grid. In local layer, individual MGs would operate and bid as autonomous entities; in market layer, an independent third party would coordinate the energy transaction among different MGs by mimicking the role of auctioneer. To cost-effectively utilize the controllable units in MGs, the concept of adjustable power is discussed. Apart from the surplus or deficit energy, adjustable power is also incorporated in the individual MGs’ bidding strategies. The local trading prices are determined via the market clearing. We analyze the economic benefits of such an energy trading mechanism and also the value of adjustable power. Numerical results demonstrate the effectiveness of the proposed framework for the energy trading among multiple MGs system.