Economic Operation of CCHP Microgrid with Heat Pump and Energy Storage

The combined cooling, heating and power (CCHP) microgrid can realize complementary advantages and unified coordinated work between multiple energy sources, and is a novel and efficient energy supply method, which can achieve multienergy complementary. In order to analyze the economic and energy-saving effects of heat pumps and energy storage devices, under the conditions of time-of-use electricity prices and micro-grid operation, a system including wind turbine, photovoltaic cell, fuel cell, CCHP system, ground source heat pump and energy storage device is established with the objective function of the minimum total operating cost in the dispatch period. The objective function of the proposed method is solved by the mixed integer programming method. The simulation result indicates that heat pumps and energy storage devices can change the coupling relationship between cooling, heating and electricity in the system, increase flexible system adjustment capacity and bring big economic benefits.