A field study of ice accretion and its effects on the power production of utility-scale wind turbines
A field study of ice accretion and its effects on the power production of utility-scale wind turbines
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DOI：
10.1016/j.renene.2020.12.014
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发表时间：
2021-01-15
期刊：
影响因子：
8.7
通讯作者：
Hu, Hui
中科院分区：
文献类型：
--
作者：
Gao, Linyue;Tao, Tao;Hu, Hui
进行了一项现场研究，以检查50米长的涡轮叶片上的结冰和结冰导致的多兆瓦风力涡轮机的发电损失。在经历了长达30个小时的结冰事件后，配备了数码相机的无人驾驶航空系统被部署到涡轮叶片上拍摄冰结构的图像，以量化沿着叶片前缘积聚的冰的厚度。在整个叶片上结冰的同时，发现更多的冰附着在外侧叶片上，叶片尖端附近的冰厚度可达0.3m。基于结冰相似概念和叶片单元动量理论，对涡轮叶片结冰厚度分布进行了理论分析。理论预测与现场测量结果基本吻合。利用水轮机监控和数据采集(SCADA)系统对结冰期间水轮机的运行状态进行了监测。尽管风力很大，但结冰的风力涡轮机的转速要慢得多，甚至在结冰期间频繁关闭，结冰导致的电力损失高达80%。这项研究旨在填补在理想化的实验室条件下进行的基础结冰物理研究与现实自然结冰条件下复杂的风力涡轮机结冰现象之间的知识空白。(C)2020爱思唯尔有限公司。保留所有权利。
A field study was conducted to examine ice accretion on 50-m-long turbine blades and icing-induced power production losses to multi-megawatt wind turbines. An unmanned-aerial-system equipped with a digital camera was deployed to take images of the ice structures on turbine blades after undergoing a 30-hour-long icing event to quantify the ice thickness accreted along blade leading edges. While ice accreted over entire blade spans, more ice was found to accrete on outboard blades with the ice thickness reaching up to 0.3 m near blade tips. Based on the icing similarity concept and blade element momentum theory, a theoretical analysis was performed to predict the ice thickness distributions on turbine blades. The theoretical predictions were found to agree with the field measurements well in general. Turbine operation status during the icing event was monitored by using turbine supervisory control and data acquisition (SCADA) systems. Despite the high wind, iced wind turbines were found to rotate much slower and even shut down frequently during the icing event, with the icing-induced power loss being up to 80%. The present study aims to fill in the knowledge gaps between the fundamental icing physics studies conducted under idealized lab conditions and complex wind turbine icing phenomena under realistic, natural icing conditions. (c) 2020 Elsevier Ltd. All rights reserved.