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| Loading control method of reproducing 5 DOF loads to wind turbine |
| YIN Xiu-xing1, GU Ya-jing1, LIN Yong-gang1, YE Hang-ye2, LI Wei1 |
| 1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;2. State Key Laboratory of Wind Power System, 310012, Hangzhou 310012, China |
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Abstract A loading control scheme is proposed to reproduce the five-degree-of-freedom loads for wind turbine testing applications. The wind rotor and blades were represented by a rotating circular solid disc. A set of electro-hydraulic loading actuators was uniformly distributed along the axial and radial directions of this disc and was controlled to recreate such representative loads. A pragmatic loading control strategy was also presented to decompose turbine loads into the reference forces for each loading actuator. Nonlinear mathematical model of a typical axial loading actuator was established and analyzed. Furthermore, a back-stepping force controller was proposed and designed to track the decomposed force trajectory. Simulation results have demonstrated the effectiveness and higher response speed of the back-steeping force controller in reference force tracking and validated that the proposed control strategy could be easily implemented to reproduce the turbine loads with relatively high accuracy.
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Published: 01 August 2015
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复现风力机五自由度载荷的加载控制方法
为满足风电机组载荷测试的需要,提出一种模拟机组五自由度载荷的加载控制方案.将叶轮等效成加载盘,并沿该盘轴向和径向均布若干电液力加载器,控制各加载器的输出力来合成并复现所给定的载荷波形谱.提出加载策略并建立加载力控制系统非线性数学模型.在此基础上,设计反演力控制器并进行仿真研究.结果表明,加载方案具有可行性,采用反演控制的加载力系统能有效地再现给定载荷,且响应性能和力跟踪精度较高.同时表明,所提出的加载策略容易实现,并能较准确的复现五自由度参考载荷.
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