摘要
探究光伏组件表面积灰对其输出特性的影响及污秽颗粒在组件表面的沉积规律,有助于制定清灰方案,提高光电转化效率。以置于华北电力大学风机大厅楼顶的光伏阵列为研究对象,进行人工布灰试验,探究了不同积灰量对组件输出功率、电流和电压的影响;为探究某单一因素对污秽颗粒沉积的影响,利用COMSOL软件建立与光伏组件自然积灰试验条件相同的颗粒沉积数值模型,模拟分析了风速、湿度、颗粒粒径和污秽浓度对光伏组件表面污秽颗粒沉积的影响。试验结果表明:积灰对工作电压影响较小,对输出功率和工作电流影响较大,且当积灰密度为5.07 g/m^(2)时,组件输出功率、电流和电压的变化率分别为8.71%、6.48%和0.40%。模拟结果表明:其他条件相同时,颗粒的沉积量随风速和粒径的增大均先减小后增大,在风速3 m/s和粒径15μm时取得最小值;相同条件下,颗粒沉积量均随湿度和污秽的浓度的增大而增大。
The influence of ash deposition on the output characteristics of photovoltaic(PV)modules and the deposition rule of pollution particles on the modules’surface are studied,which are helpful for formulating an ash removal scheme and improving the efficiency of photoelectric conversion.The PV array on the roof of a fan hall in North China Electric Power University is taken as the research object,and an artificial ash distribution experiment was carried out to explore the influence of different ash deposition amounts on the output power,current and voltage of modules.To determine the influence of one single factor on the deposition of pollution particles,a numerical model of particle deposition is established using COMSOL under the same conditions as those in the natural deposition test of PV modules,and the influences of wind speed,humidity,particle size and pollution concentration on the deposition of pollution particles on the surface of PV modules are simulated and analyzed.Test results show that ash deposition has little influence on the working voltage,but a great influence on the output power and working current.When the ash deposition density is 5.07 g/m^(2),the changing rates of output power,current and voltage are 8.71%,6.48%and 0.40%,respectively.Simulation results show that when other conditions are the same,the deposition amount of particles decreases first and then increases with the growing wind speed and particle size,and the minimum value is reached at the wind speed of 3 m/s and particle size of 15μm.Under the same conditions,the particle deposition amount increases with the growing humidity and pollution concentration.
作者
吕玉坤
周庆文
魏子安
赵伟萍
汪岳池
LÜYukun;ZHOU Qingwen;WEI Zi’an;ZHAO Weiping;WANG Yuechi(School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,China)
出处
《电源学报》
CSCD
北大核心
2024年第2期175-182,共8页
Journal of Power Supply
关键词
光伏组件
输出特性
积污特性
试验研究
数值模拟
Photovoltaic(PV)module
output characteristics
fouling characteristics
experimental study
numerical simulation
