共查询到18条相似文献,搜索用时 156 毫秒
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《太阳能》2021,(8)
漂浮式水上光伏电站是通过在水面建设浮筒平台,将光伏组件安装在浮筒上进行发电,此类电站不占用土地,且水体对光伏组件有冷却效应,可以抑制光伏组件表面温度的上升,从而使光伏电站可以获得更高的发电量。但漂浮式水上光伏电站的浮筒会随着水位、季风等外在环境因素的变化而发生位移,导致照射到光伏组件的太阳入射角发生改变,从而影响光伏组件的发电量,造成较大的经济损失;而且当浮筒发生位移时,锚固系统的钢缆所受到的牵引力也会发生变化,而长时间的位移变化将严重影响漂浮式水上光伏电站的使用寿命。详细阐述了通过双目视觉位移视频监控技术实现对漂浮式水上光伏电站浮筒的位移监测,当浮筒的位移超过警戒线时,报警信号会显示于人机界面,光伏电站运维人员可及时发现并进行处理。 相似文献
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针对现有漂浮式风力机在风浪作用下运动响应较大的问题,提出一种具有圆台形浮筒的新型半潜式平台。基于FAST耦合水动力、空气动力和系泊系统等物理场,同时结合水动力学软件AQWA计算的频域参数对不同风况下漂浮式风力机动力学响应进行分析,并在额定风况下与OC4-DeepCwind漂浮式风力机进行对比。分析结果表明:不同风速对漂浮式风力机的纵荡、纵摇及艏摇运动影响明显,对垂荡运动影响较小;与OC4漂浮式风力机相比,新型漂浮式风力机在各风况下纵摇、横摇响应得到明显降低,具有良好的稳定性。 相似文献
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为实现海洋波浪发电系统输出功率优化控制,提出傅氏分析法优化的改进灰狼算法。在保留灰狼优化算法最本质特征基础上,增加全新的精英狼搜索策略和狼群整体展开策略,优化包围圈形成策略、狼群搜索猎物方式和狼群结构,确保改进灰狼算法能避免因浮子水动力非线性陷入局部最优。引入傅氏分析法分解海洋入射波和电机运动部件响应,对浮子捕获频率范围内的每个波浪分量,使用改进灰狼算法求解对应的最佳电机控制参数,最大限度地捕获其携带的功率。仿真表明,输入不同模拟海洋入射波时,基于傅氏分析法和改进灰狼算法,可有效实现振荡浮子式波浪发电系统的最大功率点跟踪。 相似文献
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设计研发一种新型浮筒式波浪能发电装置,并对其进行试验研究。采用1∶16的缩尺比制作模型,通过不同输水管径及不同波浪条件的模型试验分别研究输水管径、波浪高度、波浪周期这3个因素的变化对新型波浪能发电装置输水流量、上水量、一二级能量俘获效率的影响特征规律,为实际建设波浪能发电装置提供可靠的设计依据。试验结果表明:随着输水管径的增大,流量、上水量、能量俘获效率呈一致增大的趋势;随着波高的增大,流量、上水量均有所增加,但能量俘获效率反而减小,而波浪周期的变化对三者的影响幅度较为稳定。该模型试验中,所设计新型浮筒式波浪能发电装置的俘获效率最高可达37%,证明新型浮筒式波浪能发电装置是一种具有竞争力的方案。 相似文献
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为改善半潜式平台漂浮式风力机动态响应,提出将扰流片螺旋布置于半潜式平台浮筒下部的结构设计方法,将附加螺旋扰流片的半潜平台漂浮式风力机与原平台进行对比,并研究扰流片布置螺距对平台性能的影响。结果表明:频域分析中扰流片能够显著降低平台所受横摇波浪激励力矩,对平台垂荡、横摇、纵摇辐射阻尼及附加质量均有一定提升,平台频域幅值响应算子(RAO)峰值明显降低;安装扰流片后,平台固有周期增加,抗共振性能更好;时域分析中,在垂荡、纵摇方向上扰流片布置螺距对平台运动响应影响较小,对横摇运动响应抑制明显,其中0.29D(D为半潜式平台浮筒半径)扰流片平台性能较佳。 相似文献
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A. Saket A. Etemad-Shahidi 《Renewable Energy》2012,40(1):90-97
This study aims to investigate wave power along the northern coasts of the Gulf of Oman. To simulate wave parameters the third generation spectral SWAN model was utilized, and the results were validated with buoy and ADCP data. First, annual energy was calculated in the study region with the hindcast data set covering 23 years (1985-2007). The areas with the highest wave resource were determined and the area proximity to the port of Chabahar is suggested as the best site for the installation of a wave farm. Second, the average monthly wave energy in this area was investigated. The most energetic waves are provided by the southeast Indian Ocean monsoon from June to August. Finally, the wave energy resource was characterized in terms of sea state parameters. It was found that the bulk of annual wave energy occurs for significant wave heights between 1 and 3 m and energy periods between 4 and 8 s in the direction of SSE. 相似文献
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Novel ocean energy permanent magnet linear generator buoy 总被引:3,自引:0,他引:3
K. Rhinefrank E.B. Agamloh A. von Jouanne A.K. Wallace J. Prudell K. Kimble J. Aills E. Schmidt P. Chan B. Sweeny A. Schacher 《Renewable Energy》2006,31(9):1279-1298
This paper describes the research, design, construction and prototype testing process of a novel ocean energy direct drive permanent magnet linear generator buoy. The buoy employs the vertical component of the motion of ocean waves to power a linear generator. The generator consists of a permanent magnet field system (mounted on the central translator shaft) and an armature, in which the power is generated (mounted on the buoy). The translator shaft is anchored to the sea floor, and the buoy/floater moves armature coils relative to the permanent magnet translator to induce voltages. The electrical and mechanical structures of the buoy generator are provided, along with performance characteristics, including voltage, current and developed power. 相似文献
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A numerical technique that employs a computational fluid dynamics (CFD) code is used to perform coupled fluid–structure interaction simulation of a wave energy device in order to assess power output in a 3D numerical wave flume. The current method determines the motion of the buoy from the dynamic solution of the fluid flow problem and the dynamic buoy motion problem rather than prescribing the motion of the buoy. The power output of the device is calculated for different wave conditions. The technique was expanded for an array of two buoys to determine the interference between them. 相似文献
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Silvio Barbarelli Mario Amelio Teresa Castiglione Gaetano Florio Nino Michele Scornaienchi 《国际能源研究杂志》2021,45(1):661-690
The aim of this paper is to illustrate the design of a new wave energy converter, composed of a point absorber and a hydraulic system (power take off) and sized for recovering energy in calm seas from waves near the shore. The point absorber is consisting of a rectangular shaped buoy integrating a piston pump. The set buoy‐pump oscillates under the waves action and moves natural water in a closed circuit hydraulic system (power take off) composed of a piping connecting the piston pump itself, a pressurized reservoir, a hydraulic turbine and a discharge tank. The methodology adopted for designing the main constituents involves a 1D mathematical model, settled for understanding the motion of the buoy under the hypothesis of regular waves and fully developed sea, and a sizing procedure applied for the design of all the components of the hydraulic system. The project related to the Calabrian site of Cetraro (Mediterranean Sea—south Italy) led to designing a system with a 4 m large buoy, associated with a small 13 cm diameter micro Pelton turbine, so that more than 22 000 kWh could be recovered in a year. 相似文献