The Multi-float WaveSub Wave Energy Converter

船舶动力系统（MPS）WaveSub波浪能转换器（WEC）通过捕获波浪的次表面轨道能量性质来提供可持续的、具有成本效益的低碳可再生能源，从而解决了能源三难困境。该专利装置通过独特的单/多浮子动力输出系统可调节到所有海况。在获得超过300万英镑的赠款和200万英镑的私人投资后，MPS完成了1：30规模的单浮式WaveSub WEC的广泛测试，验证了发电的计算模拟。MPS目前正在着手制造1：4比例的WaveSub，并于2016 / 2017年在FaBTest进行测试。使用碳信托平准化能源成本（LCOE）方法的初始技术经济模型显示，WaveSub提供的LCOE低于现有WEC设备，与传统发电相比具有竞争力，从单一浮动过渡到（1.5MW）至多浮式（多兆瓦）设备。这个与MPS和巴斯大学（UoB）合作的为期12个月的项目提供了1：30比例的多浮式WaveSub器件，其输出通知LCOE模型，这将释放WaveSub的真正商业潜力。在该项目中，UoB将为多浮子装置设计和建造动力输出系统。基于以前1：30比例单浮子装置的经验，多浮子概念的PTO将由多个独立控制的机电单元组成，这些单元与其他WaveSub系统（例如绞盘）一起设计，以实现适当的集成。这些单元的独立控制将为探索不同的操作制度提供最大的灵活性。该装置将受到真实的控制，并允许运动、功率捕获和负载测量。将实施一系列控制方案，以验证数值模型并评估所有条件下的整个系统性能。这可能包括线性阻尼，自适应阻尼，和先进的非线性方案，如闭锁和分离控制。

Marine Power Systems (MPS) WaveSub Wave Energy Converter (WEC) addresses the energy trilemma by providing sustainable, cost effective, low carbon renewable energy by capturing the sub-surface orbital energy nature of waves. The patented device is tuneable to all sea states through a unique single / multi float power take-off system. Securing over £3M in grants and £2M in private investment, MPS has completed extensive testing of the single float WaveSub WEC at 1:30 scale, validating the computational simulations of power generation. MPS is currently embarking on the fabrication of a 1:4 scale WaveSub, with testing at FaBTest in 2016 / 2017. Initial techno-economic modelling using Carbon Trust Levelised Cost of Energy (LCOE) methodology shows WaveSub delivering a LCOE lower than existing WEC devices and competitive with conventional generation, with transition from single float (1.5MW) to multi-float (Multi-MW) device.This 12 month project with MPS and University of Bath (UoB) delivers the modelling, design, manufacture, test & validation of a 1:30 scale multi-float WaveSub device, with outputs informing the LCOE model that will unlock WaveSub's true commercial potential. Within the project, UoB will design and build the Power Take Off system for the multi-float device. Building on previous experience from a 1:30th scale single float device, the PTO for the multi-float concept will consist of multiple independently controlled electro-mechanical units designed in conjunction with other WaveSub systems (e.g. winching) for proper integration. The independent control of the units will provide the greatest flexibility for exploringdifferent operational regimes. The unit will be controlled in real time and will allow motion, power capture and loading measurements. A range of control schemes will be implemented in order to validate numerical models and to evaluate whole system performance in all conditions. This could include linear damping, adaptive damping, and advanced nonlinearschemes such as latching and declutching control.