山地光伏电站用单立柱和双立柱光伏支架结构的受力对比分析

COMPARATIVE ANALYSIS OF FORCES ON SINGLE-PILLAR AND DUAL-PILLAR PV SUPPORT STRUCTURES USED IN MOUNTAIN PV POWER STATION

山地光伏电站多采用单立柱光伏支架和双立柱光伏支架,本文利用SAP2000软件模拟了这2种光伏支架结构在光伏组件自重、风荷载、雪荷载等不同荷载组合工况下的钢用量、桩基础受力及檩条挠度的情况,且建模过程中考虑了檩条的高厚比及光伏组件安装倾角。模拟结果表明:单立柱光伏支架的钢用量可比双立柱光伏支架的节省1.3%;单立柱光伏支架基础顶部所受最大上拔力约为双立柱光伏支架基础所受最大上拔力的2倍;双立柱光伏支架中檩条的挠度值比单立柱光伏支架中檩条的大,且两者出现挠度最大值的部位不同。

Mountain PV power stations mostly use single-pillar PV supports and dual-pillar PV supports.In this paper,SAP2000 software is used to simulate the self-weight of PV modules,wind load,and snow load of two kinds of PV support structures,in terms of steel consumption,pile foundation stress and purlin deflection under different load combinations,the height-to-thickness ratio of purlin and the installation inclination angle of the PV modules were considered in the modeling process.The simulation results show that the steel consumption of single-pillar PV support is 1.3%less than that of dual-pillar PV support;the maximum pull-up force on the top of single-pillar PV support foundation is about twice that of double-pillar PV support foundation;the purlin deflection value in the dual-pillar PV support is greater than that of single-pillar PV support,and the positions where the maximum deflection occurs are different.