The investigation of energy-saving operation strategy for micro-grid

The appearance of micro-grid can decrease the adverse influence of the distributed generation to the power grid, and realize the combined supply of cooling, heating and electricity for the load area. The co-generation system usually is operated using two basic operation strategies: the following electric load (FEL) and following thermal load (FTL). In order to avoid the excess energy caused by the basic strategies in the operation process and further increase the energy utilization ratio, based on the basic operation strategies, the combined operation strategy (COS) is proposed, and the corresponding mathematical model is constructed. Considering both of the energy quantity and quality, the exergy analysis method is used for the energy consumption analysis of the system. For the energy consumption, operation cost, carbon dioxide emissions (CDE), and exergy enenry ratio (EER), three different strategies are contrasted by the example to verify the feasibility and effectiveness of the proposed strategy. © Sila Science. All Rights Reserved.