Optimization on microgrid with combined heat and power system

Along with the rapid development of energy internet and the closer relationship between power and heat, this paper proposed the combined heat and power dispatch model for regional grid-connected microgrid. Taking into consideration energy storage, time-of-use (TOU) electricity price and timing sequence characteristics of different types of load and distributed generators, a microgrid consisting of a wind turbine, a photovoltaic, a combined heat and power system, an electric boiler, a fuel cell and an energy storage system was selected. The optimization method based on the Cplex software was employed to obtain the optimal costs and operation modes of the microsources in the scheduling period, and then compared the model with two traditional methods of scheduling. The simulation results indicat that the proposed model could balance the power and heat output and decrease the operation costs. This model can serve as references for the development of energy internet and power and heat scheduling. © 2015 Chinese Society for Electrical Engineering.