Analysis of the effects of control strategies and wave climates on the loading and performance of a laboratory scale horizontal axis tidal turbine

OCEAN ENGINEERING

卷:212

Article

Martinez, Rodrigo¹  Ordonez-Sanchez, Stephanie¹  Allmark, Matthew²  Lloyd, Catherine²  O'Doherty, Tim²  Germain, Gregory³  Gaurier, Benoit³  Johnstone, Cameron¹ 

[1] Univ Strathclyde, Dept Mech & Aerosp Engn, Energy Syst Res Unit, 75 Montrose St, Glasgow G1 1XQ, Lanark, Scotland

[2] Cardiff Univ, Coll Phys Sci & Engn, Cardiff Marine Energy Res Grp, Cardiff CF24 3AA, Wales

[3] Ctr Manche Mer Nord, Marine & Struct Lab, IFREMER, 150 Quai Gambetta, F-62200 Boulogne Sur Mer, France

关键词: Tank testing;    Torque control;    Speed control;    Tidal turbine;    Wave-current interaction;    Marine energy;   

DOI  :  10.1016/j.oceaneng.2020.107713

来源: Elsevier

【 摘 要 】

To understand the influence of complex hydrodynamic loads on tidal turbines, laboratory testing is necessary as a first approach. Previous laboratory work undertaken gave an indication that the use of speed control strategies may disguise the associated loading range that a turbine may be subjected to when this is operated with a variable speed control strategy. However, the preceding work was undertaken in a highly controlled environment without the influence of turbulent flows. The focus of this paper is directed towards the study of wave-induced loads on tidal turbines when these are controlled using two strategies and the impact that these parameters have on the turbine's performance when this is operated in a recirculating flume. Laboratory tests were undertaken with a 0.9 m diameter horizontal axis tidal turbine subjected to combined wave and current conditions with both regular and irregular waves. Constant speed and constant torque control strategies have been considered, for which rotor thrust, torque and blade root bending moment have been measured. Results show that similar to previous studies, average loads and power capture values remain unchanged between control strategies and the superposition of waves to the current. However, signal fluctuations are 2 to 3 times higher for torque control than for constant speed control strategy. A phase difference between the periodic signals of the turbine thrust and the incoming waves was also identified, in this case, the phase variation was lower when using torque than speed control. This work thus demonstrates the implication of studying strategies to control a marine converter from early stages of development.

【 授权许可】

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