Wind2DC: Medium Voltage DC Power Take Off Technologies for Floating Offshore Wind Turbine Energy Conversion and Collection Systems

Wind2DC：用于浮式海上风力发电机能量转换和收集系统的中压直流取电技术

• 批准号: EP/X035867/1
• 负责人: Alasdair McDonald
• 金额: $ 116.41万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX035867%2F1
• 关键词: Wind2DC; Medium; Voltage; DC; Power

The Wind2DC project will develop co-designed mechanical and electrical novel power take off systems for offshore wind-turbines that will these wind-turbines to be directly connected to a medium voltage dc (MVDC) collector system, as opposed to the ac collector systems that are current used. This will help exploit the full potential of offshore floating wind by: (1) reducing system costs, (2) Increasing the feasible size of offshore wind-farms, and (3) alleviate expected issues with dynamic cabling that will arise in floating wind-turbines. This supports the UK commitment to Net Zero by 2050 by enabling access to a large fraction of the estimated 4 TW of energy that is accessible from offshore wind. The project is strongly supported by industry, including Siemens Energy, Clas-SiC, JDR Cables, SSE Renewables.Floating Offshore Wind Turbine technology has the potential to unlock wind resources in offshore areas in which it is unfeasible to use conventional fixed-bottom turbine structures. This would provide a significant increase in exploitable offshore wind resources, with higher capacity factors than onshore or fixed-bottom offshore wind resources. The European floating wind resource has been estimated at 4 TW, a large share of which is located off Scotland and the south-west of England. To date, all offshore wind-farms have utilised ac electrical collection systems (in which the voltages and currents oscillate) to gather the power from each wind-turbine in the farm together before it is transmitted back onshore. In wind-farms close to shore, this transmission is also done using an ac system. in wind-farms that are far offshore the power is usually converted to dc (in which the voltages and currents are steady values) and transmitted back onshore through a High Voltage dc (HVDC) transmission line. Such systems require power-electronic converters to change the power from the wind-farm between ac and dc on both ends of the HVDC line. The advantage of dc systems is that the amount of conductors within the transmission cables is substantially reduced and, unlike ac transmission systems, there is no feasible limit on the length of the transmission system.Floating offshore wind-turbines devices require dynamic collection network cabling that can withstand the movement of the floating offshore wind-turbine platforms. In waters deeper than 100m it is difficult to fix the array cables to the seabed, leading to proposals in which the entire cable collection network is also floated. For such propositions a move to a Medium Voltage DC collection (MVDC) network, rather than a conventional ac collection network, would bring substantial benefits in reducing the weight of the cables themselves, as well as increasing their flexibility due to the reduction in conductor sizes need for a given power rating when moving from ac to dc. One of the main barriers to realising these MVDC collection networks is the unavailability of wind-turbine power-take off systems that are compatible with a high-power MVDC network voltages (expected to be in the region of 100 kilovolts plus).The Wind2DC project will focus on developing light-weight efficient power take off systems for Offshore Wind Turbines, providing a direct MVDC transmission compatible voltage output from each offshore wind-turbine, addressing the issue of cost-effective collection architectures, and enabling large scale offshore wind-turbines arrays with floating dynamic cabling. To do this the project will exploit novel generator, generator interface converter and dc-dc converter designs, with a focus on collaborative co-design of each of these aspects between the university teams that make up the project. To achieve this the researchers will exploit the potential next-generation wide bandgap semiconductors, which offer substantially increased voltage ratings as well as reduced switching losses, and novel modular electrical generator designs.

WIND2DC项目将开发共同设计的机械和电气新型功率，取消了离岸风磁盘的系统，这些系统将直接连接到中型电压DC（MVDC）收集器系统，而不是与当前使用的AC收集器系统相反。通过：（1）降低系统成本，（2）增加海上风农场的可行大小，以及（3）减轻在浮动风力驾驶中会产生的动态电缆的预期问题。这支持到2050年英国对净净的承诺，从而可以访问可从海上风能获得的估计4个TW能源的大部分。该项目得到了行业的强烈支持，包括西门子的能源，CLAS-SIC，JDR电缆，SSE Renewables。铺设海上风力涡轮机技术有可能在海上使用常规固定式涡轮机结构的海上区域解锁风资。与陆上或固定底部的海上风资相比，这将为可剥削的海上风力资源带来大幅度增加，其容量要素更高。欧洲浮动风资源估计为4 TW，其中很大一部分位于苏格兰和英格兰西南部。迄今为止，所有离岸风电农产品都使用交流电气收集系统（电压和电流振荡器）在农场中的每个风涡轮机中收集电源，然后再将其从陆上传输后。在靠近岸边的风农场中，此变速箱也是使用交流系统进行的。在远距离海上的风农场中，功率通常会转换为直流（电压和电流为稳定值），并通过高压DC（HVDC）传输线向陆上传输。这样的系统需要电源转换器，以将功率从HVDC线的两端的AC和DC之间的风饲料更改。 DC系统的优点是，传输电缆中的导体数量大大降低，与交流传输系统不同，传输系统的长度没有可行的限制。将离岸风磁通设备浮动需要动态收集网络，以承受浮动越野车盘平台的移动。在深水域中，很难将阵列电缆固定在海床上，从而提出了整个电缆收集网络的建议。对于此类命题，转移到中型电压DC收集（MVDC）网络而不是传统的AC收集网络，将为减轻电缆本身的重量而带来很大的好处，以及由于在移动AC到DC时的导体大小需求减少了导体大小的需求，因此增加了其灵活性。意识到这些MVDC收集网络的主要障碍之一是，与高功率MVDC网络电压相兼容的风涡激力用电源的无法获得（预计将在100公里的区域内，以及WIND2DC项目将专注于从近乎近乎近乎杂货的远离车队中，将专注于开发轻型电动机的远离系统，以开发出远离速度的远离系统。风力驾驶，解决了具有成本效益的收集体系结构的问题，并可以通过浮动动态电缆实现大型海上风车阵列。为此，该项目将利用小说生成器，生成器接口转换器和DC-DC转换器设计，重点是组成该项目的大学团队之间每个方面的协作共同设计。为了实现这一目标，研究人员将利用潜在的下一代宽带隙半导体，这些宽带隙半导体可提供大幅提高的电压等级以及减少开关损耗以及新型的模块化电气发电机设计。