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Optimal operation for CCHP With phase-change energy storage and demand response considerations

Energy internet and energy system integration with multi-energy complementation are vital developing directions of future energy supply systems. Combined cooling, heating and power(CCHP) realizes the coupling use of various forms of energy, and is one of the fundamental elements of the energy internet. During the concentrated CCHP operation analysis, due to the restriction of the fixed heat-electricity ratio, the coordination of the system and the combustion units will greatly impact the running efficiency of concentrated CCHP. In this paper, optimal operation strategy for the concentrated CCHP with the incorporation of the phase-change energy storage devices is analyzed. The flexible load participating in the demand response is also taken into consideration. On this basis, the economy objective function of CCHP is established and the units' output is scheduled. The results of an example in a micro grid applying CCHP show that the energy consumption is reduced, and the working efficiency of the system is improved.