Optimization Strategy of CCHP Integrated Energy System Based on Source-Load Coordination

Abstract

This paper focuses on the park-level CCHP integrated energy system (IES). In order to track the fluctuation of the renewable energy and load in real time, an optimal dispatching strategy based on Model Predictive Control is proposed, which considers the schedulable resources on both sides of the source and the load. At first, mathematical models are established for the equipment units and energy supply networks in the system. Then, the index of integrated energy exergy-efficiency is introduced into the model to make the optimization results more rational. Combing the integrated energy exergy-efficiency and the operation cost, a multi-objective optimization is applied to obtain the day-ahead dispatching scheme as the base plan. On the basis of the day-ahead plan, the intraday rolling optimization based on source-load coordination is carried out with the objective of integrated energy exergy-efficiency. The results of case studies show the correctness and effectiveness of the strategy proposed in this paper.