Dynamic Analysis of a Floating Vertical Axis Wind Turbine Under Emergency Shutdown Using Hydrodynamic Brake
Dynamic Analysis of a Floating Vertical Axis Wind Turbine Under Emergency Shutdown Using Hydrodynamic Brake
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DOI：
10.1016/j.egypro.2014.07.215
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Kai Wang;M. O. Hansen;T. Moan
中科院分区：
文献类型：
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作者：
Kai Wang;M. O. Hansen;T. Moan
对于正在运行的垂直轴风力发电机来说，紧急停机始终是一个挑战。本研究对安装在半潜式支撑结构上的 Darrieus 转子的 5 MW 垂直轴风力涡轮机进行了检验。基于相关风浪数据，针对一系列环境条件下的紧急停机情况，对浮动垂直轴风力涡轮机进行了非线性气动-液压-伺服-弹性耦合模拟。当发电机发生故障时，应采用制动器来阻止转子的加速，防止转子超速而发生后续灾难。除了传统的机械制动器之外，还提出了一种新颖的液力制动器应用于停机情况。评估了正常操作条件下和紧急停机事件期间液力制动对平台运动和结构载荷的影响。还研究了液力制动和机械制动的使用。液力制动器的应用预计将有效地关闭转子并减少平台运动和结构载荷。
Emergency shutdown is always a challenge for an operating vertical axis wind turbine. A 5-MW vertical axis wind turbine with a Darrieus rotor mounted on a semi-submersible support structure was examined in this study. Coupled non-linear aero-hydro-servo-elastic simulations of the floating vertical axis wind turbine were carried out for emergency shutdown cases over a range of environmental conditions based on correlated wind and wave data. When generator failure happens, a brake should be applied to stop the acceleration of the rotor to prevent the rotor from overspeeding and subsequent disaster. In addition to the traditional mechanical brake, a novel hydrodynamic brake was presented to apply to the shutdown case. The effects of the hydrodynamic brake on the platform motions and structural loads under normal operating conditions and during the emergency shutdown events were evaluated. The use of both the hydrodynamic brake and mechanical brake was also investigated. The application of the hydrodynamic brake is expected to be efficient for rotor shutdown and for reducing the platform motions and structural loads.