Research On Optimal Design Of Multi Energy Complementary Residential Type Microgrid

The state puts forward the development goal of"carbon peak,carbon neutral",and all industries take green and low-carbon as the leading transformation development.Therefore,the research on new power system related technologies mainly based on new energy generation is of great importance.With the large-scale access of distributed power on the user side,as a subsystem of microgrid cluster,the input of residential type microgrid will increase significantly.Therefore,the optimal design of multi energy complementary residential type microgrid is proposed in this paper.In this paper,based on the load characteristics of residential area,a multi-source micro grid power supply system composed of photovoltaic array,wind turbine,diesel generator and storage battery is established,and a multi-objective nonlinear optimization model considering new energy utilization hours,environmental penalty and net present value cost is proposed.NSGA2 is used to solve the parameters in the model,such as the type and number of fans,the capacity of photovoltaic array,the type and number of diesel engines,and the type and group number of batteries.The correlation between the output of multiple power sources and the fluctuation of external environment and residential load is explored.The NSGA2 result scheme is compared with the HOMER result scheme to further optimize the microgrid planning and design method.The research results are as follows:by analyzing the results of multi-source output,it is found that the output of multi-source is complementary to the external environment,the load fluctuation of residential area and multi-source.Compared with NSGA2 and HOMER,the results show that although the economy of NSGA2 is 0.5%higher than HOMER,the annual utilization hours of new energy is 6.3%higher than HOMER,and the wind turbine capacity of NSGA2 is 4 times that of HOMER,and the photovoltaic capacity of NSGA2 is reduced by67%,which effectively reduces the uncertainty of power supply;According to the analysis of environmental friendliness,the proportion of new energy power supply in the system can reach more than 90%,and the total annual CO₂ emission is not more than 1000kg.The analysis of new energy subsidies shows that NSGA2 scheme is about 18%higher than HOMER scheme;The reliability of the capacity allocation scheme of the micro grid in the residential area is tested by taking the 14 day period with low light intensity as the cycle.The feasibility of the optimal design scheme is verified by building a small community microgrid experimental platform..Based on the community load demand,this paper explores the planning and design method of community micro grid through the research mode of multi energy complementary and multi-objective optimization,which provides a scientific method for the construction of community type new energy microgrid.