Control of a Twin-Turbine Submerged Floating System in turbulent flow
Control of a Twin-Turbine Submerged Floating System in turbulent flow
复制标题
DOI：
10.1016/j.oceaneng.2021.108769
复制
发表时间：
2021-04
影响因子：
5
通讯作者：
A. Sato;H. Kanoh;K. Takagi
中科院分区：
文献类型：
--
作者：
A. Sato;H. Kanoh;K. Takagi
研究了基于模型预测控制的双涡轮浮式发电系统的控制问题。TTSFS是为了收集洋流能量而开发的，它具有双涡轮机和通过使用单点系泊系统的天气变化能力。由于气流中的湍流，TTSFS受到扰动，输出功率波动。本研究的目的是显示的可能性，以减轻运动的TTSFS和输出功率的波动，同时在湍流中，使用叶片桨距控制和发电机的转矩控制。使用运动模拟器进行控制模拟，该运动模拟器可以模拟与旋转双涡轮机和单点系泊系统耦合的TTSFS的非线性6自由度运动。基于仿真结果，得出的结论是，运动控制是必要的，以防止大的不对称运动，可能会影响系泊系统的完整性。此外，MPC具有同时减轻TTSFS的运动和输出功率的波动的能力。然而，在运动的方差、角速度或转矩的方差以及输出功率的平均值之间存在折衷。
Control of a Twin-Turbine Submerged Floating System (TTSFS) with Model Predictive Control (MPC) is discussed in this paper. The TTSFS has been developed to harvest Ocean Current Energy, and it has twin turbines and a weather-vaning ability by using a single-point mooring system. The TTSFS is perturbed and the output power fluctuates, due to turbulence in the flow. The aim of this study is to show the possibility to mitigate motions of the TTSFS and fluctuations of the output power simultaneously in turbulent flow, using blade pitch control and torque control of the generator. The control simulation is performed using a motion simulator which can simulate nonlinear 6 DoF motions of the TTSFS coupled with rotating twin-turbines and a single-point mooring system. Based on the simulation results, it is concluded that motion control is necessary to prevent large asymmetric motion which may affect the integrity of the mooring system. Also, MPC has the ability to mitigate motions of the TTSFS and the fluctuation of the output power simultaneously. However, there are tradeoffs among the variance of the motions, the variance of the angular velocity or the torque and the average of the output power.