| Power generation efficiency is a key parameter to indicate whether a power plant is in a good condition.Because the installed capacity of photovoltaic power plants and the amount of radiation is constant,the greater the efficiency of the power plant is,the higher the amount of power will generate,so it is necessary to find the root of restricting efficiency and reasonable optimization program.In this paper,I mainly focus on the cell's conversion efficiency and the PV module's PID effect,and analyze the influence of these factors on the power efficiency.Firstly,I give a brief overview of the research background,the development of solar energy and the research status of PID effect,and discusses that it is necessary to improve the conversion efficiency and reduce the production cost of PV cells by restraining the PID effect.Secondly I introduce the working principle of solar cells,the conversion efficiency of PV cells and PV modules,and analyze the causes and characteristics of PID effect.After that,through the simulation software of PC1D,the paper deep analyzes the various factors that affect the conversion efficiency of the cell.I obtain the method to improve the efficiency by analyzing the angle of parasitic resistance,surface recombination rate,temperature,junction depth and doping concentration of BSF.Finally,starting from different volume resistivity of EVA,different backplane structure and different grounding modes,I find methods to improve PV module's PID effect.The above methods are proved to be feasible.At the same time,I also discuss various methods of restraining the PID effect and predict the future development trend of it.At the same time,I propose a comprehensive solution to suppress the PID effect,which includes high body resistivity of EVA film,fluorine of backboard and negative grounding of the system. |
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