摘要
Abstract
With the global scale application of n-TOPCon PV modules,their low-irradiance performance has become one of the key factors affecting the system performance ratio(PR),which will significantly affect the energy output of PV power generation systems under actual operating conditions.This paper first analyzes the evaluation indicators and key influencing factors of the low-irradiance performance of PV modules.Then,by comparing multiple sources of measured data,the low-irradiance performance of n-TOPCon PV modules is analyzed from three perspectives:public document data from mainstream PV module manufacturers,measured data from third-party testing agencies,and factory measured data from PV module manufacturers.Finally,based on actual engineering projects,the impact of low-irradiance performance on system PR is analyzed,revealing the influence of parameter distortion in the PAN file(PV module parameter file in PVsyst software)of n-TOPCon PV modules on system PR prediction,and proposing suggestions.The research results show that:1)In the equivalent circuit model of a single diode,parallel resistance is the dominant electrical parameter for the low-irradiance performance of n-TOPCon PV modules.The larger the parallel resistance,the better the low-irradiance performance of the PV module.2)The low-irradiance loss rate of mainstream n-TOPCon PV modules in the current market is generally distributed in the range of 3%to 5%under low-irradiance conditions with a solar irradiance of 200 W/m2,which can be used as an industry reference benchmark.3)Some PV module manufacturers use overly idealized parameters in the fitting process of PAN files,resulting in higher system PR prediction results obtained through PVsyst software simulation.Under the strict engineering contract constraints with system PR as the core assessment indicator,such deviations may result in significant performance fines during the acceptance stage of the project,or even a major performance risk of overall rejection.4)Based on measured data,a reasonable range of key parameters for PAN files is proposed,and suggestions for risk prevention and control mechanisms are provided,providing a reliable technical basis for the implementation of PV power generation projects.关键词
n型TOPCon光伏组件/弱光性能/PAN文件/并联电阻/弱光工况/太阳辐照度/能效比/光伏发电仿真/风险管控Key words
n-TOPCon PV modules/low-irradiance performance/PAN file/parallel resistance/low-irradiance conditions/solar irradiance/PR/PV power generation simulation/risk management and control分类
信息技术与安全科学
