高辐照量下遮挡时PV组件性能特性模拟分析

NUMERICAL INVESTIGATION ON PERFORMANCE OF PHOTOVOLTAIC MODULE UNDER SHADOW AND HIDE IRRADIATION CONDITION

为研究高辐照量下(辐射强度为1200 W/m^2)遮挡时的组件可靠性,根据能量守恒定律,结合电池的单二极管和反向特性数学模型,建立适合分析遮挡情况的光伏模组仿真模型,用以分析标准工况和高辐照量条件下组件的光电转换性能和组件工作温度特性、二极管工作特性。模拟计算结果表明:在高辐照量遮挡情况下,组件最大输出功率比标准工况大18.5%;组件正常运行时的最高温度比标准工况时高14℃,比实际工况高30℃。因此,在高辐照量的地区,光伏组件尽量选择安放在通风处。旁路二极管分布可沿用标准工况的设计方案。

In order to analyze reliability of modules under high irradiation （solar irradiance intensity is 1200 W/m2） and shading condition, the article , base on the energy conservation law, combines the single diode model and the reverse characteristic model of silicon cell. Numerical simulation model is proposed for the analysis of the photovohaic performance, temperature characteristics and the bypass diodes operating characteristics of photovohaic module under standard and micro concentration condition. Simulation results show that under high irradiation and shading condition, the maximum power of module can increase about 18.5% compared to standard condition; the operating temperature is 14℃ higher than the standard condition and 30 ℃higher than the actual condition. Thus, on the area with high irradiation, modules should be selected to place ventilated. Besides, modules can use the original distribution scenario of bypass diodes designed under standard condition.