A comparison of extreme structural responses and fatigue damage of semi-submersible type floating horizontal and vertical axis wind turbines
A comparison of extreme structural responses and fatigue damage of semi-submersible type floating horizontal and vertical axis wind turbines
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DOI：
10.1016/j.renene.2017.02.067
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发表时间：
2017-08-01
期刊：
影响因子：
8.7
通讯作者：
Moan, Torgeir
中科院分区：
文献类型：
--
作者：
Cheng, Zhengshun;Madsen, Helge Aagaard;Moan, Torgeir
目前，用于深水的漂浮式风力涡轮机的开发主要基于水平轴风力涡轮机（HAWT）。然而，浮动垂直轴风力涡轮机（VAWTs）是可能的替代方案，由于其潜在的能源成本降低。本文比较了浮动式水平轴风力发电机和垂直轴风力发电机的随机动力响应，重点研究了结构的极端响应和疲劳损伤。在半潜式平台上安装了一个5 MW三叶HAWT和三个叶片数从2到4不等的5 MW VAWT。在此基础上，分别计算了车辆在运行状态和停放状态下的随机动力响应、短期极端结构响应和疲劳损伤。结果表明，三叶和四叶浮式垂直轴风力发电机与三叶浮式水平轴风力发电机在发电功率变化、最大塔基弯矩以及塔基和系泊缆疲劳损伤方面具有相似的性能。然而，三叶片和四叶浮式垂直轴风力发电机的系泊缆中的最大张力大约是浮式水平轴风力发电机的四倍，这意味着其系泊系统面临重大挑战。双叶浮式垂直轴风力发电机的最大塔基弯矩和疲劳损伤是非常显著的。(C)2017爱思唯尔有限公司版权所有
Currently development of floating wind turbines for deep water is mainly based on horizontal axis wind turbines (HAWTs). However, floating vertical axis wind turbines (VAWTs) are possible alternative due to their potential in the cost of energy reduction. This study deals with a comparison of stochastic dynamic responses of floating HAWTs and VAWTs with emphasis on the extreme structural responses and fatigue damages. A 5 MW three-bladed HAWT and three 5 MW VAWTs with blade number ranging from two to four were mounted on a semi-submersible platform. Their stochastic dynamic responses, short-term extreme structural responses and fatigue damages were estimated in both operational and parked conditions. The results show that the three- and four-bladed floating VAWTs and the three-bladed floating HAWTs considered have similar performances in the variation of generator power production, in the maximum tower base bending moment and in the fatigue damages at tower base and mooring lines. However, the maximum tensions in mooring line for the three- and four-bladed floating VAWTs are approximately four times higher than that of floating HAWTs, which implies a significant challenge for their mooring systems. The maximum tower base bending moment and fatigue damage in the two bladed floating VAWT are extremely significant. (C) 2017 Elsevier Ltd. All rights reserved.