Study On The Multi-objective Optimization Design And Technical Economic Evaluation Of The Megawatt-class Large-scale Photovoltaic Power Plant On The Ground

As a kind of clean green energy,solar phtovoltaic(PV)energy has been widely used in the field of power generation.At present,the construction cost of PV power plants has been reduced year by year,but the rate is slowing down.Economy has become an important measurement standard of PV power station.To improve the economy of PV power plants,the design of PV power plants need to be scientifically and reasonably improved and optimized.Therefore,it is of great value to improve the economic efficiency of PV power plants.The content of this paper is to optimize the design of Chinapower.Qinghe agricultural PV power generation project.As is well-known,the accurate weather data is particularly important for the design of PV power plants.Firstly,Meteonorm meteorological data and NASA data are compared and analyzed in order to obtain more accurate meteorological data.Based on accurate meteorological data,PV power plants are optimized.The optimized objectives includes best inclination,the number of components in series and parallel,the way of the battery is placed,array spacing,optimum design of shaded area in PV field and the optimization of grid connection scheme for the PV modules of the agricultural greenhouses.Based on the study results of foreign scholars,the mathematical model of PV array's own shadow loss is improved.The calculation method of PV array spacing for practical engineering design is proposed consequently.In this paper,the maximum generating capacity is used as an optimization target and the PSO algorithm is used to calculate the spacing of the PV array.For the economic efficiency of this PV station,this method is compared with the conventional method.The SunEye equipment is used to measure the shaded area of the PV field and draw a shadow mask.Referring to the scheme mask,The PV array optimization scheme is presented.For the plan of the grid-connection of the agricultural greenhouse PV modules,the experimental analysis platform is established.The optimal solution is determined by the experimental data and the analysis of the technical economy.Finally,the overall design of the project is analyzed from from the view of technical economy.By analyzing the net present value,the dynamic payback period and the static payback period of the project,the overall optimal design are determined.