The Multi-float WaveSub Wave Energy Converter

海洋电力系统(MPS)WaveSub Wave Energy Converter(WEC)通过捕捉海浪的次表层轨道能量特性，提供可持续、低成本、低碳的可再生能源，解决了能源三难问题。该专利装置可通过独特的单/多浮子动力输出系统调谐到所有海况。MPS获得了超过300万GB的赠款和200万GB的私人投资，已经完成了1：30比例的单一浮动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，2016/2017年将在FabTest进行测试。使用Carbon Trust Leved Cost of Energy(LCOE)方法的初步技术经济模拟显示，WaveSub提供的LCOE低于现有的WEC设备，与传统发电竞争，从单浮点(1.5兆瓦)过渡到多浮点(多MW)设备。这个与MPS和巴斯大学(UOB)合作的12个月的项目提供了1：30比例的多浮点WaveSub设备的建模、设计、制造、测试和验证，其输出为LCOE模型提供信息，将释放WaveSub的真正商业潜力。在该项目中，大华银行将设计和建造多浮子装置的动力输出系统。基于以前1：30比例的单浮子装置的经验，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(例如绞车)一起设计，以实现适当的集成。机组的独立控制将为探索不同的运行制度提供最大的灵活性。该装置将被实时控制，并将允许运动、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整个系统在所有条件下的性能。这可能包括线性阻尼器、自适应阻尼器和高级非线性方案，如闭锁和解锁控制。

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.