摘要
针对建设在钢筋混凝土屋面上方的多阵列屋面分布式光伏电站,以其光伏支架结构设计中的若干影响因素为研究对象,从光伏支架的结构组成及设计流程出发,结合其受力特点和方式,研究阵列排布方式、相邻立柱间距、檩条间距、斜撑支撑点位置、光伏支架倾角、相邻光伏支架间距这6种因素对光伏支架承载力的影响。研究结果表明:在采用同样材料、规格光伏支架的前提下,这6种影响因素对光伏支架的承载力均存在具有一定规律的影响。1)同样列数的情况下,优先选用“竖向组件2行”的阵列排布方式,对应的光伏支架承载力性能较优且排布更为合理;2)相邻立柱间距设置在光伏组件长边水平投影长度的60%~70%范围内时,对应的光伏支架承载力性能较优;3)檩条间距设置为光伏组件长边水平投影长度的70%左右时,可以保证光伏组件自身的刚度和较大的承载力,且方便施工时的安装操作;4)当斜撑支撑点位置与斜梁高侧端点的距离为整个斜梁长度的35%~60%时,对应的光伏支架承载力性能较优;5)当采用配重式支架基础时,光伏支架倾角通常采用5°~20°的小角度,以减少产生的光伏附加荷载,从而确保光伏支架主体结构的安全性;6)当相邻光伏支架间距采用光伏组件短边长度的150%~200%(即每榀光伏支架承担约1.5~2.0块光伏组件)时,对应的光伏支架承载力性能较优,且经济性较好。所得结论和规律可为后续多阵列屋面分布式光伏电站的光伏支架结构设计提供参考。
This paper focuses on the multi-array roof distributed PV power station built above the reinforced concrete roof,taking several influencing factors in the PV bracket structure design as the research object,starting from the structure composition and design process of the PV bracket,combined with the stress characteristics and modes,studies the influence of array arrangement,distance between adjacent columns,purlin spacing,support point positions of slant support,inclination angles of PV brackets,distance between adjacent PV brackets on the bearing capacity of the PV bracket.The research results show that,under the premise of using the same materials and specifications of PV brackets,these six influencing factors have a certain regularity on the bearing capacity of PV brackets.1)In the case of the same number of columns,the"vertical module two rows"array layout is preferred,and corresponding PV bracket has better bearing capacity performance and more reasonable arrangement.2)When the distance between adjacent columns is set within the range of 60%~70% of the horizontal projection length of the long side of the PV module,the corresponding bearing capacity performance of the PV bracket is better.3)When the spacing between purlins is set to about 70% of the horizontal projection length of the long side of the PV module,it can ensure the rigidity and greater bearing capacity of the PV module itself,and facilitate the installation and operation during construction.4)When the distance between the support point positions of slant support and the high end point of the inclined beam is 35%~60% of the entire length of the inclined beam,the corresponding PV bracket has better bearing capacity performance.5)When using a counterweight bracket foundation,the inclination angle of PV bracket is usually a small angle of 5°~20°to reduce the additional PV load generated and ensure the safety of the main structure of the PV bracket.6)When the distance between adjacent PV brackets is 150%~200% of the short side length of the PV module(i.e.each PV bracket bears about 1.5~2.0 PV modules),the corresponding PV bracket has better bearing capacity performance and better economy.The conclusions and patterns obtained can provide reference for the design of PV bracket structures in future multi-array roof distributed PV power stations.
作者
郑宇
龚政
闫冬
王峰
Zheng Yu;Gong Zheng;Yan Dong;Wang Feng(Architectural Design&Research Institute of Tsinghua University Co.,Ltd.,Beijing 100084,China;China Energy Envision(Hainan)Integrated Intelligence Energy Co.,Ltd.,Beijing 100007,China;Beijing Shougang International Engineering Technology Co.,Ltd.,Beijing 100026,China)
出处
《太阳能》
2024年第8期66-77,共12页
Solar Energy
关键词
屋面分布式光伏电站
多阵列
光伏支架结构
立柱
斜梁
檩条
承载力
roof distributed PV power station
multi-array
PV bracket structure
column
inclined beam
purlin
bearing capacity
