大跨度柔性光伏支架阵列极值风荷载与干扰效应
Extreme Wind Load and Interference Effect of Large-Span Flexible Photovoltaic Support Array
周强 1张郁江 2张春伟 3王伯洋 3柯世堂 3王立山 4顾汉富1
作者信息
- 1. 国家电投集团江苏新能源有限公司,南京 210003
- 2. 南京航空航天大学民航学院,南京 211106;中国能源建设集团江苏省电力设计院有限公司,南京 211000
- 3. 南京航空航天大学民航学院,南京 211106
- 4. 江苏中压电气工程集团有限公司,南京 210029
- 折叠
摘要
大跨度柔性光伏支架阵列作为一种新型风敏感结构体系,其纵横向流场干扰相比单排光伏更为复杂,这导致光伏阵列极值风荷载难以准确预测.以某典型柔性光伏示范项目为例,首先基于大涡模拟方法分析了单排柔性光伏表面脉动风压特性,与风洞试验的对比验证了有效性.基于Davenport法和Sadek-Simiu算法确定了非高斯风荷载峰值因子,揭示了光伏阵列极值风荷载分布规律.最后系统探讨了阵列风荷载的干扰作用,从谱分析方法和流场驱动角度对阵列风荷载干扰机理进行了探讨.研究表明大跨度柔性光伏支架阵列极值风荷载在迎风二排处达到最小值,阵列的干扰效应呈现出各排光伏板静力风荷载逐渐减小且脉动风荷载逐渐增大;0°和180°风向角下柔性光伏阵列风压干扰系数极值分别为1.09和1.14,弯矩干扰系数极值分别为 1.49和1.21.
Abstract
The large-span flexible photovoltaic support array is a new wind sensitive structure system,and its vertical and horizontal flow field interference is more significant than that of the single-row photovoltaic.The complexities make it difficult to accurately predict the extreme wind load of photovoltaic array.Taking a typical flexible photovoltaic demonstration project as the object,this paper analyzes the wind pressure characteristics of the single-row flexible photovoltaic surface based on the large eddy simulation method and verities the effectiveness by comparing it with the wind tunnel test.Based on the Davenport method and the Sadek-Simiu algorithm,the peak factor of non-Gaussian wind load is determined and the distribution law of the extreme wind load of photovoltaic array is revealed.Finally,the interrow interference of the array wind load is discussed systematically and the mechanism of the array wind load interference is discussed from the perspectives of spectrum analysis and flow field driving.Results show that the extreme wind load of the large-span flexible photovoltaic bracket array reaches the minimum value at the second windward row,and the interrow interference effect of the array presents a decreasing static wind load and an increasing fluctuating wind load.At 0° and 180° wind direction angles,the wind pressure interference coefficients of the flexible photovoltaic array are 1.09 and 1.14,respectively,and the bending moment interference coefficients are 1.49 and 1.21,respectively.
关键词
柔性光伏支架阵列/大涡模拟/流场特性/极值风荷载/干扰效应Key words
flexible photovoltaic bracket array/large eddy simulation/flow field characteristic/extreme wind load/interference effect引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据