Study on a novel hydraulic variable-pitch system of wind turbine
Study on a novel hydraulic variable-pitch system of wind turbine
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DOI：
10.1109/icit.2008.4608636
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发表时间：
2008-04
期刊：
影响因子：
--
通讯作者：
Xin Gu;Jing Hui
中科院分区：
文献类型：
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作者：
Xin Gu;Jing Hui
分析了一种新型风力机液压变桨距系统的结构和工作原理。针对液压变桨机构在开桨和合桨过程中的液压回路不同的特点，分别建立了液压变桨机构在两种不同工作过程中的线性数学模型。针对不同的过程，利用MatLab/Simulink环境设计了液压变桨距系统的仿真模型，得到了系统对参考正弦曲线的动态响应，以验证所提出的数学模型的有效性。仿真结果表明，所建立的系统模型对电液变桨距系统的设计是合理有效的。并得出了从开球到闭球应采用不同的控制策略的结论。所建立的数学模型对设计和开发实用的液压变桨距系统具有一定的参考价值。
The structure and the principle of a novel hydraulic variable-pitch system of wind turbine are analyzed in this paper. Since the hydraulic circuits during opening pitch and closing pitch are different, the linear mathematic models for hydraulic variable-pitch mechanism among the two different operating processes are built up respectively. Due to the different processes, the simulation model of the hydraulic variable-pitch system is designed by using Matlab/Simulink circumstance and the system dynamic responses to referenced sine curves are obtained to evaluate the validity of the proposed mathematic models. Simulation results show that the proposed system models are reasonable and effectual for designing an electro-hydraulic variable-pitch system. Furthermore the conclusion is obtained that different control strategies should be used from opening pitch to closing pitch. As a result, the mathematic models are useful to design and develop a practical hydraulic variable-pitch system.