A Multiple Energy Complementary Strategy Considering CCHP and Flexible Load in Active Distribution Network

With increasingly serious environmental problems, improving the energy utilization and reducing the emission of pollution has become an important direction for smart grid. The distributed CCHP system becomes a promising DG with its high energy efficiency. In this paper, firstly the traditional CCHP structure is optimized by heat storage system and power driven heat pump/electric refrigerator, in which the fixed relationship between power supply and heating is broken. Secondly, this paper analyses the characteristics of the flexible load. Considering the advantages of grid power supply, DG and demand response collaboration, this paper puts forward a multiple energy complementary strategy considering CCHP and FL. The method considers many indicators including the economic indicator, the environmental indicator, the energy efficiency indicator and the interests of users. Further, this paper transforms the multi-objective optimization problem into an integrated single objective problem by analytic hierarchy process. PSO algorithm is used in this strategy and the fitness function is constructed by penalty function method.