Economic dispatch of multi-energy system considering seasonal variation based on hybrid operation strategy

A modeling framework of a multi-energy system (MES) with coordinated supply of combined cooling, heating and power using solar energy is established in this research. A new operation strategy named following operation cost (FOC) is proposed to compare with traditional operational modes which are following electric load (FEL) and following thermal load (FTL). The results indicate that the strategy of FOC has the advantage in saving operation cost. The study analyzes the three operation strategies from three criteria including the operation cost (OC), the carbon dioxide emission (CDE), and the primary energy consumption ratio (PER) in each season to find the most suitable hybrid operation strategy in the MES. For the MES of this paper, we choose the FEL strategy in winter, the FOC strategy in summer, spring, and autumn. The hybrid operation strategy is selected to make the MES have higher PER, lower CDE, and lower OC. The hybrid operation strategy has better comprehensive performance than the single opera-tion strategy. It provides a reference for the operation mode of other MESs. (c) 2021 Elsevier Ltd. All rights reserved.