Parameter Sensitivity Analysis of Economic Operation Cost of CCHP-Typed Microgrid

The microgrid with CCHP(combined cooling, heating and power unit) and distributed generations can realize the cascade utilization of energy and improve the comprehensive energy efficiency. CCHP-typed microgrid has become a major direction of energy construction. In this paper, the operating characteristics of CCHP, gas boiler and electric refrigeration devices are analyzed, and then the economic operation cost function of CCHP-typed microgrid is established, considering the cooling, heating and power energy balace constraints in CCHP-typed microgrid. Parameter sensitivity analysis is carried out to study the effects of natural gas price, electricity price purchased from distribution network, affluence of cooling and heating supply of CCHP, and power variation of distributed generation on the economic operation cost. Moreover, the parameter sensitivity factor is introduced to evaluate the impact on operation cost of CCHP-typed microgrid. Finally, an example of CCHP-typed microgrid is established to verify and analyze the parameter sensitivity to the economic operation cost.