Multi-objective Optimal Operation Strategy Based on Economy and Flexibility of Integrated Energy System Considering Energy Storage Life Characteristics

Abstract

The optimal operation strategy of an integrated energy system is an important means to ensure the economic and stable operation of the system. Given the problem of economic-flexible multi-objective coordination optimization of the integrated energy system （IES）， this paper selects the typical electric-gas-thermal energy system framework and builds mathematical models of system equipment. Taking account of system operation cost and flexibility， this paper proposes IES multi-objective operation optimization strategy considering energy storage life characteristics. The optimal solution of multi-objective problems uses the ε-constraint method， which transforms the secondary objective function into a constraint and then puts it into the solution frame to obtain the Pareto frontier. The optimal operation plan of the IES is determined through fuzzy decision-making. Finally， the proposed model and method are proved feasible by example simulation.

Keywords

• integrated energy system
• energy storage life
• thermal inertia
• multi-objective operation optimization
• ε-constraint method