A Study on Integrated Energy System Long-term Planning Optimization Considering Complementarity and Economy

Carbon reduction and neutrality receive more and more attention due to concerns about global warming and the energy crisis. The access of renewable energy brings greater volatility and uncertainty to the integrated energy system (IES). Analyzing the relationship between complementarity and economy is the key to maintaining the long-term benefits of IES. To illustrate the multi-energy coordination and complementary effect in IES, a two-stage planning optimization method considering economy and complementarity is proposed in this paper. Firstly, the complementarity quantification index is established by analyzing the correlation of different energy net loads. Meanwhile, the comprehensive economic index is formed considering the system construction, operation, and maintenance. Then, the energy system is modeled, and the device configuration simulation is carried out. Finally, the Pareto solution set of the programming scheme is obtained by the NSGA-II algorithm. Measured by proposed indicators, the annual total costs increase by 15.8% when the system complementarity is enhanced by 41.3%.