Economic operation of microgrid with combined heat and power system

For analyzing the economic and energy-saving effect of CHP(Combined Heat and Power) and energy storage,an economic optimal model including photovoltaic,wind power,CHP system,fuel cell and energy storage system is built for grid-connected microgrid with time-dependent electricity price.Equation linearization is used to convert the optimization problem into the MILP(Mixed-Integer Linear Programming) problem.Case analysis verifies the correctness of the proposed model and algorithm.The economic benefits are compared between the microgrids with and without the CHP system and energy storage unit,which shows that,CHP system has significant economic effect and the economic benefit brought by electric energy storage is higher than that by heat energy storage.