Economics Optimization Research On Distributed Combined Cooling Heating And Power Of Microgrid

With the adjustment of energy structure in China, the natural gas and distributedgeneration is playing more and more important role in the development of the nationaleconomy. The combined cooling heating and power(CCHP) of microgrid is a kind ofdistributed energy application. Since currently this technology in the country is in thepilot phase of implementation, there are many problems need to be verified andimplemented.A commercial building in North China area is selected to establish the CCHP ofmicrogrid system model for it. In order to improve the energy efficiency of microgridsystem and reduce pollutant emissions, the model should be optimized so that providereference for CCHP of microgrid system designed. First of all, the annual buildingcooling heating and power load are predicted by using software. Establishedmathematical model, the main configurations in CCHP of microgrid system areoptimized. Then the main configuration capacity and strategy of the CCHP of microgridcan be obtained. Secondly, to solve the problem on small surplus of generating and wasteheating when system runs, the energy storage system can be introduced to furtheroptimize economic of CCHP. Optimized calculation the case, energy storage system andthe ice storage air conditioning system are proved to be feasible, which can improve theeconomy of system. In addition, the energy storage system not only can improveflexibility and energy saving of CCHP, but also to optimize the system configuration andoperation strategy. Finally, the relationship between the price of energy and economy ofmicrogrid with CCHP is discussed. Results show that economically feasible of thesystem largely depends on the local energy prices. In addition, the composition ofdistributed generation on microgrid can influence the economic and operation of theCCHP.