Operation optimization of community integrated energy system: Rationality evaluation of operation scheme and a new solution approach

The community integrated energy system (CIES) can fully utilize multiple heterogeneous energy sources by coordinating various energy equipment, thereby achieving benefits unattainable by a single energy system. However, existing research determines the use of various energy equipment solely based on operational simulation results, lacking a rationality evaluation grounded in the equipment's output mechanism. Furthermore, the optimal operation model of CIES is typically a nonconvex nonlinear model, presenting a conflict between model accuracy and solution efficiency. In this paper, we analyze the nonconvex nonlinear components, and establish a unified operation model of CIES. We examine the internal mechanism of energy equipment output from a target-driven perspective. By considering time decoupling, we design a two-phase fast calculation method for the optimal operation scheme. Finally, a specific CIES is used as a case study to demonstrate the rationality and effectiveness of the proposed theory and method. The simulation results show that our argument supports the rationality evaluation of the optimal operation scheme of CIES. The proposed method significantly improves the calculation speed of the optimal operation scheme at the expense of a small increase in total costs. Specifically, the calculation speed in this paper is improved by 87.2%, while the daily operating cost increases by only 0.012%.