Optimal Operation of Regional Integrated Energy System Based on Energy Supply Through Composite Energy Pipeline

In the background ofcarbon emission peak and carbon neutrality, the large-scale development and utilization of low-carbon and clean energy is the only way for China’s energy transition process. Composite energy pipeline (CEP) realizes the simultaneous transmission of electric energy and liquefied natural gas (LNG) with low transmission loss, which is an important development direction of energy transmission at present. In view of the significant increase in energy intensity and coupling degree in load-concentrated areas such as central cities, a new regional integrated energy system (RIES) based on the energy supply through CEP is constructed. The system considers the cascade utilization of CEP cooling energy, realizes the multi-energy coupling and complementation of electricity, gas, cooling and heat, and improves the energy utilization rate of the system. In order to improve the economy of system operation, an optimal dispatch model considering the electricity-gas integrated demand response of the system is established with the objectives of system energy purchase cost, and operation and maintenance cost. Finally, through simulation example, the optimal dispatch results of system energy flow in different scenarios are compared and analyzed, and the feasibility and effectiveness of the proposed system and optimization model are verified. © 2022 Automation of Electric Power Systems Press. All rights reserved.