A Study on Autonomous Decentralized Power Trading System in Microgrid with Renewable Energy

Abstract

One of important technological issues in microgrid is to control supply and demand balance in own system. In general, the outputs of generators are controlled using the information of frequency which is observed at each generator because the change of the system frequency implies the supply and demand balance in power systems. However, in local systems connected to bulk power system, frequency is not available to control supply and demand balance. In addition, when the owners of DGs are different, it is required that their output should be decided considering economic efficiency. In this paper, to realize such an efficient operation of microgrid, we propose a new supply and demand control method based on mobile agent (MA) technology. In our proposed method, MA intermediates bilateral contracts between customers and DG owners, and negative MA intermediates the negotiation which compensates the output change of renewable energy (RE) by other controllable DGs.