Research On Configuration And Operation Optimization Of Pelagic Island Multi-energy System

As China continues to accelerate the pace of building a maritime power,the pelagic islands,which are important fulcrums of the marine industry,have become a hot spot for development and construction.The demand gap for safe,reliable,and clean energy supply and resources such as electricity,heat,and freshwater among the residents of the islands is also increasing.Establishing a pelagic island multi-energy system that fully utilizes island renewable energy for energy supply and brings into play the complementary advantages of different energy subsystems,improving energy utilization efficiency,has become an effective way to solve the energy demand and economic issues of pelagic island.Reasonable allocation of equipment capacity and formulation of excellent operation scheduling in the pelagic island multi-energy system are important means to ensure the safe,reliable,and economic operation of the system.Therefore,this thesis takes the pelagic island multi-energy system containing renewable energy as the research object,focusing on the configuration and operation optimization of the system.The specific research contents are as follows:(1)Based on the basic architecture of pelagic island multi-energy system,a physical framework for pelagic island multi-energy system including biogas digesters and power to gas stations is constructed.The working principles and operating characteristics of renewable energy equipment,energy conversion equipment,and energy storage equipment are analyzed,and corresponding mathematical models are established.(2)A configuration optimization model for pelagic island multi-energy system considering biogas and power to gas is proposed.The K-means clustering method is used to process the annual lighting,wind speed,and load conditions,select typical daily data of various seasons,and use the lowest annual comprehensive economic cost as the objective function,a configuration optimization model for pelagic island multi-energy system considering environmental friendliness and energy abandonment is established.By analyzing the impact of biogas digesters and power to gas stations on the configuration of pelagic island multi-energy system through calculation examples,it is shown that the pelagic island multi-energy system equipped with biogas digesters and power to gas stations can meet the diverse energy needs of users while reducing economic costs and improving energy utilization efficiency.The rationality and superiority of the proposed configuration optimization model are verified.(3)An operation optimization model for pelagic island multi-energy system considering maintenance scheduling is proposed.By using scenario generation and reduction method to address the uncertainty of renewable energy unit output,a medium and long-term operation optimization model considering uncertainty and maintenance constraints is established with the lowest annual comprehensive operating cost as the objective function.By analyzing the impact of maintenance scheduling and energy storage devices on the operation status of pelagic island multienergy system through calculation examples,it is shown that joint optimization of maintenance and dispatch scheduling can improve the economic efficiency while ensuring the reliability of pelagic island multi-energy system.Moreover,the simultaneous participation of multiple energy storage devices in dispatch will further improve the economic efficiency of system operation.The effectiveness of the proposed operation optimization model is verified.