摘要
环境载荷评估的准确性直接关系到水面光伏电站锚固系统设计的安全性和经济性。光伏漂浮方阵组件多、支架结构及排布方式各异、规模日趋庞大,现有相近规范均不能给出令人信服的环境载荷估算结果。本文提出了一套基于多尺度分析的数值计算方法,对风载荷、流载荷和波浪载荷进行了预报。在数值考察验证的基础上对方阵几何模型进行适当简化,将网格单元数控制在2.5亿以内,使大规模数值计算成为可能;从漂浮方阵中摘选不同行列数的子区域,通过彼此对比确认,分析各组件环境载荷随方阵行列的变化规律,完成整体方阵环境载荷的预报。研究结果表明:上游组件对下游组件存在着明显的遮蔽效应,迎风第5行会形成风载荷次峰;方阵内部载荷基本趋于稳定;风、流载荷沿列的分布规律存在明显差异。本研究解决了水面光伏电站多尺度、大规模、无法直接进行建模计算的问题,为水面光伏电站的锚泊设计提供了数据支持。
In design of a floating PV power station, the accuracy of its environmental loads assessment is directly related to the safety and cost of its anchorage system. The industrial regulations available cannot give a convincing estimation of such loads due to the large number of floating PV array modules, different supporting structures, different layout modes, and the increasing number of the arrays. This paper develops a numerical method based on multi-scale analysis to predict wind loads, current loads, and wave loads. The geometric model of the array is partly simplified to limit the number of grid elements to 250million on the basis of numerical investigation and verification to make large-scale numerical calculations possible. Sub-areas with different row and column numbers are selected from the floating array for mutual comparison and confirmation;variations in the loads on each component with the rows and columns of the array are analyzed. The prediction of the loads on the whole array is given based on analysis. The results show that the upstream components produce a shielding effect on the downstream ones, and a wind load secondary peak is formed in the fifth row windward. The loads over the central area of an array basically tend to be stable;evident differences occur in the distributions of wind and current loads over a column. This study solves the problem of how to calculate floating PV power stations with multi-scale,large-scale and direct modeling, and helps improve their anchorage design.
作者
席凯
黄国珍
冯榆坤
陈熹
陈长馥
陈作钢
XI Kai;HUANG Guozhen;FENG Yukun;CHEN Xi;CHEN Changfu;CHEN Zuogang(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Xiamen Mibet New Energy Co.,Ltd,Xiamen 361022,China)
出处
《水力发电学报》
CSCD
北大核心
2023年第1期148-158,共11页
Journal of Hydroelectric Engineering
基金
上海超级计算中心的大力支持。
关键词
漂浮方阵
环境载荷
数值模拟
多尺度分析
大规模数值计算
floating array
environmental load
numerical simulation
multi-scale analysis
large-scale numerical calculation
