Study Of Economic Operation In Microgrid

As an effective supplement of the great power grid and an effective form used by the distributed energy, microgrid has attracted wide attention from scholars of various countries. With the development of the research on microgrid, the determination of economic benefit and the formulation of economic operated strategy in microgrid have become more and moreurgent.Based on the analysis of the general structure, the energy structure and the microgrid energy management systems, this paper firstly established the mathematical! models of generation power, generation cost, pollution emission management cost, operation and maintenance cost, profit of CCHP and power trade for the wind generator, photovoltaic cell, miniature gas turbine the cooling-heating-power supply system, fuel cell and battery. Then the paper proposed the economic operated strategy, and established the economic operation model in microgrid with full consideration of many factors such as the power market time-of-use electricity price and benefit of CCHP factors, which intergrates the schedule of generators, intelligent management of energy storage units and optimization of operated efficiency of the network into a uniform optimization problem. Finally, relying on the construction scale of the New Energy Oower System State Key Laboratory in North China Electric Power University, with the laboratory system for actual example, the paper gave the analysis and calculation of the microgrid economic operation in interconnection and isolated operation. The optimal combination and optimal power generator verified trading plan of each micro source in; the microgrid laboratory system have been put forward in each season typical daily load cases. The effectiveness and feasibility of the economic operated strategy have been also overall demonstrated.Combining with the current situation of microgrid real-time monitoring platform in the laboratory, the research findings have been used in the microgrid real-time monitoring platform, and provided a solid theoretical basis for the further improvement of energy management system.