Optimal Capacity Sizing For Wind-solar-biogas-battery Microgrid

With the increasing shortage of energy and the increasing demand for electricity,the renewable energy micro-grid has become the future development trend of the power grid.According to the distribution of natural resources,it is an important direction for the future development of renewable energy to establish a distributed energy combined power generation system composed of multiple renewable energy sources at the load center to achieve independent or grid-connected operation.Micro-grid capacity allocation is an important foundation for micro-grid development planning.The core problem to be solved is to find the best plan for power capacity planning and configuration,so that the micro-grid can meet the requirements of power supply reliability and reduce construction costs during construction.Requirements.Therefore,this paper proposes a microgrid system with multi-energy complementarity in wind,solar,and biogas storage,and uses two different methods to study its capacity allocation to achieve the purpose of determining the optimal capacity allocation.The specific work of this article is as follows:First,the research status of multi-energy hybrid power generation technology and micro-grid capacity optimization configuration is elaborated.The micro-grid system model of wind-solar bio-storage multi-energy complementation is established.The mathematical model has laid a theoretical model foundation for subsequent research.Secondly,in order to effectively improve the reliability and economy of the multi-energy complementary micro-grid system of wind,solar and biogas storage,the objective function and constraints of the power supply planning of the system are established,and a control strategy to coordinate the output of each power supply in the micro-grid is designed.And use whale optimization algorithm to solve the model.Through simulation examples,the feasibility and effectiveness of the algorithm are verified,and the optimal capacity allocation scheme of the system is obtained.Finally,based on HOMER software,the system model established in this paper is simulated,and the optimal capacity configuration scheme simulated by this method isobtained.The optimized configuration scheme is from the aspects of power generation,system cost and power supply reliability of the equipment.The analysis is carried out,and the configuration results obtained by the two different simulation methods are compared and analyzed,and the advantages and disadvantages of the two methods are summarized.It provides different ideas for studying the planning and design of small microgrids.