O&M Optimisation for the X-Rotor Wind Turbine Concept

“X-转子海上风力机”是一种垂直轴风力机(VAWT)和水平轴风力机(HAWT)的混合风力机。X-转子的概念直接针对降低能源成本，并通过以下关键创新的组合解决风力涡轮机的可扩展性：1)通过一种易于扩展的电力输出方法大幅降低传动系统的成本，该方法不需要变速箱或多极发电机，同时仍能在电力转换方面达到相当的效率水平。2)通过不将重型部件或机械放置在海拔高度较高的位置，以及通过对涡轮机的全面简化，大大降低了运行和维护(O&M)成本。我的博士学位旨在解决运维策略方面的新挑战。有三个工作包旨在为每个问题得出最低的运营成本。首先，如果二次(HAWT)转子中的一个不起作用，使用涡轮机的控制实施将允许仍然存在能量提取，但涡轮机增加的负荷值得吗？此外，二级涡轮机的维护方法有几种选择，例如模块化转子可以在岸上维护，或者更传统的离岸维护。最后，二次转子的转速将远远高于传统的涡轮机，因此我对叶片的维护方法和组成进行了研究。

The "X-Rotor offshore wind turbine" is a Vertical Axis Wind Turbine (VAWT)/Horizontal Axis Wind Turbine (HAWT) hybrid. The X-rotor concept directly targets cost of energy reduction and addresses scalability of wind turbines through a combination of the following key innovations: 1) Large reductions in the cost of drive-trains through an easily scalable approach to power take-off that does not require a gearbox or a multi-pole generator, whilst still achieving comparable efficiency levels in power conversion. 2) Large reductions in Operation and Maintenance (O&M) costs through no heavy components or machinery being situated at a great height above sea-level, and through general simplification of the turbine. My PhD aims to address the new challenges in operations and maintenance strategies. There are three work packages that aim to conclude the lowest operational cost for each problem. Firstly, the control implementation of utilising the turbine if one of the secondary (HAWT) rotors is not functioning will allow there to still be energy extraction, but is the increased loading on the turbine worth this? Additionally, the maintenance method for the secondary turbines has several options, such as modular rotors which can be maintained onshore, or alternatively more conventional offshore maintenance. And finally, the rotational speed of the secondary rotors is going to be much greater than conventional turbines, hence my investigation into the maintenance method and composition of the blades.