| Driven by the energy revolution and the continuous development of economy and society,the integrated energy system has become a new way to solve the dilemma of energy development in China.In the future,China’s energy system will develop in the direction of economy,efficiency and security.The integrated energy system can effectively improve energy efficiency by coupling various energy sources together,so it has become one of the main directions of China’s energy and power system transformation.Integrated energy system planning is the premise and foundation of comprehensive energy development,which is directly related to the economic issues of energy supply and consumption in the future.For the society,customers and investors,it is very important to design an efficient operation mode and system with reliable operation,strong sustainability,low carbon emission level and minimum investment cost.How to fully consider the investment and energy demand of customers in the design stage of integrated energy system,and develop a comprehensive energy system construction scheme that meets the investment constraints of customers and meets the future social,economic and environmental requirements is an urgent problem to be solved in the process of comprehensive energy project.Through the coordination and complementarity of various energy sources,the optimal capacity planning of the integrated energy system under the limited financial constraints can promote the local absorption of renewable energy,realize the optimal utilization of resources and improve the utilization rate of comprehensive energy.Firstly,the relationship between energy production and conversion of different equipment in the integrated energy system is studied from three aspects of energy production equipment,energy conversion equipment and energy storage equipment,and the coupling and complementary characteristics of different equipment are analyzed,so as to establish the energy production and output model of different equipment and describe the energy conversion process of different equipment;then,from the perspective of planning level and operation level,the energy production and conversion relationship of different equipment are described The framework structure of bi level optimization planning model of integrated energy system is established,and the two-level optimization model considering equipment investment constraints is established,and the planning model is solved based on intelligent algorithm.Then,the comprehensive evaluation system of comprehensive energy system is established from four aspects of economy,environment,energy and security,and the fuzzy comprehensive evaluation model based on AHP entropy weight method is established.In this paper,a case study of an integrated energy system is carried out.Based on the actual project data,the integrated energy system planning scheme is studied,and the comprehensive evaluation is carried out.The simulation results show that the model can consider the requirements of the integrated energy system to optimize the equipment configuration,which provides theoretical basis and technical support for the planning and design of the integrated energy system. |
