光伏系统风荷载体型系数分析

ANALYSIS OF SHAPE COEFFICIENTS OF WIND LOADS OF PHOTOVOLTAIC SYSTEM

光伏阵列组件间遮挡导致不同区域风荷载体形系数有所不同,采用CFD数值模拟方法,分析不同倾角(α分别为30°和38°)、不同高度(h分别为0.5和1.5 m)、不同区域的光伏阵列风荷载变化特征,近而得出光伏阵列在风向角为0°和180°时不同区域风荷载体型系数的变化规律。结果表明,由于外围光伏组件的遮挡作用,后续各排组件所受风荷载均有不同程度的衰减,同时随着组件距地面高度的增加,体型系数也随之增大。最终给出光伏阵列外部和内部区域体型系数建议值。

The shielding effect between photovoltaic array modules leads to different wind load carrier shape coefficients in different regions.In view of this,based on CFD(computational fluid dynamics)numerical simulation,the shape coefficients of wind loads of solar photovoltaic panels in different angles(α=30° and 38°),different heights(h=0.5 m and 1.5 m)and different regions are analyzed,then the variation law of the shape coefficients of wind loads in wind direction angle of 0° and 180° is obtained.The results show that due to the shielding effect of the surrounding solar photovoltaic panels,the wind load of the subsequent solar photovoltaic panels is attenuated in different degrees.At the same time,with the increase of the height of the solar photovoltaic panels from the ground,the shape factor increases too.Finally,the suggested shape coefficient values in outer and inner regions of the solar photovoltaic panels are given.