Research On Multi-energy Complementary Microgrid Optimal Disp Atching Based On Improved Bat Algorithms

With the rapid development of science and technology,many environmental problems have been brought about,and the deterioration of the environment has also made people pay more and more attention to environmental protection.Electricity is an indispensable energy for modern human life.Traditional power generation methods,such as thermal power,will emit a large number of greenhouse gases and pollute the environment.Therefore,the micro-grid system with new energy generation as the core has been proposed and has been rapidly developed and applied in recent years.However,due to the imperfection of microgrid technology,for example,some problems of clean energy power generation have not been completely solved,including how to improve the consumption of clean energy power generation,including the high operating cost of clean energy microgrid.In view of the existing problems in the research process of microgrid,this paper proposes some methods and strategies,which are of great significance to improve the existing problems in microgrid technology.This paper mainly studies the optimal dispatching of multi-energy complementary microgrid with fan,photovoltaic,battery energy storage and Diesel Spare generating units.Firstly,according to the structure of typical micro-grid system,the distributed units in the system are modeled and analyzed,including fan,solar energy,diesel generator and battery energy storage system,and the micro-grid energy management system is briefly described,which lays the foundati.on for the follow-up chapter.Then,the structure of the multi-functional complementary microgrid system is established,and the objective function is to minimize the total operating cost of the microgrid system.The distributed units in the system are analyzed in detail.For the operation cost model of the battery energy storage system,besides the operation and maintenance cost and depreciation cost,the electricity of the battery energy storage system is also considered.Energy loss cost makes the economic analysis of battery energy storage system more perfect.In addition,considering the environmental costs brought by the operation of diesel generators,an optimal dispatching strategy of multi-energy complementary microgrid is proposed.Combining the operation cost and optimal dispatching strategy of multi-energy complementary microgrid system,the bat algorithm,an intelligent optimization algorithm,is improved and applied to solve the mathematical model constructed in this paper,so as to make it more efficient in solving the optimal dispatching problem proposed in this paper.The effectiveness of the algorithm is verified by numerical simulation,and the optimal dispatching results of multi-energy complementary microgrid are obtainedFinally,considering the two operation modes of multi-energy complementary micro-grid,i.e grid-connected operation and island operation,a multi-objective mathematical model is established to minimize the total cost of multi-energy complementary micro-grid system and maximize the utilization rate of clean energy generation.Four special scenarios of micro-grid system operation are set up,and different optimal dispatching strategies under two operation modes of micro-grid system are proposed.Then,the bat algorithm is improved to solve the model,and the optimal dispatching results of multi-energy complementary microgrid in four scenarios are compared and analyzed by numerical simulation.The characteristics and advantages of parallel/off-grid operation of microgrid system are compared,and an optimal dispatching scheme is formulated to balance the clean energy output and the economic operation of microgrid systemIn summary,this paper mainly focuses on two modes and four scenarios of multi-energy complementary micro-grid to optimize dispatching analysis and research,and get the corresponding optimal operation scheme.