Configuration-Operation Joint Optimization Method Of Electro-Hydrogen Coupled AC/DC Microgrid With Demand Side

In recent years,renewable energy is developing rapidly.Aiming at the goal of energy-based economic and social construction,AC-DC hybrid microgrid has become a hot topic in the field of microgrid due to its safe and reliable performance,efficient and flexible operation mode.In the microgrid,because traditional energy storage technologies such as battery energy storage are difficult to take into account both peak shaving and emergency transfer,and are only suitable for short-term electrical energy storage,they are easily limited by their scale and reliability when the system is running for a long time.Therefore,the introduction of clean,environmentally friendly and high utilization of hydrogen power generation system can effectively solve the above problems.However,with the improvement of the reliability of the microgrid system,the consumption of economic costs has been increased.Therefore,the optimization problem and economic analysis of microgrid need to be studied in depth.Firstly,according to the operating mechanism of the renewable energy power generation system,battery energy storage and hydrogen power generation system,the topology structure of the electric-hydrogen coupled AC/DC microgrid system is constructed,and the demand side response mode and load classification are explained.The incentive demand side response model is established,and its effectiveness is verified,which lays a theoretical foundation for the optimization of the subsequent microgrid.Secondly,a multi-mode operation control strategy is proposed for the problem of power coordination of microgrid operation.Based on this,an electrical-hydrogen coupled AC/DC microgrid optimal configuration method with demand side is proposed.The objective function with minimum equivalent annual cost is established for power supply economy.Under the constraints of satisfying the demand balance,the incentive demand side response is considered,and the particle swarm optimization algorithm is used to solve the optimal configuration.At the same time,the sensitivity analysis of different operation modes,self balance rate constraints and new energy construction cost to multiple evaluation indexes is carried out to verify the rationality and effectiveness of the method.Then,considering the operation characteristics of various devices in the system,an operation optimization method of AC/DC microgrid with electricity hydrogen coupling considering demand side is studied.The optimization objective of the minimum daily comprehensive operation cost of the system is created,and the operation optimization model is established.The minimum operation cost and optimal operation strategy of the microgrid under different typical scenes are solved by the mixed integer linear programming algorithm.At the same time,the demand side response,different operation strategies and the percentage of transferable load capacity are analyzed.Finally,the optimal configuration and operation optimization of the microgrid are combined to discuss the configuration-operation joint optimization method of electro-hydrogen coupled AC/DC microgrid with demand side.The goal of the minimum annual total cost of the system is set.Under the relevant constraints,the configuration-operation joint optimization model of microgrid is established,the particle swarm optimization combined with the optimization algorithm of mixed integer linear programming is used to obtain the optimal capacity configuration and operation output plan.The influence of different optimization methods on the economic benefits and technical evaluation indexes of the system is analyzed to verify the effectiveness of the method.