摘要
Abstract
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.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Key words
roof distributed PV power station/multi-array/PV bracket structure/column/inclined beam/purlin/bearing capacity分类
动力与电气工程
