Reducing rotor speed variations of floating wind turbines by compensation of non‐minimum phase zeros
Open Access
- 1 July 2013
- journal article
- Published by Institution of Engineering and Technology (IET) in IET Renewable Power Generation
- Vol. 7 (4), 413-419
- https://doi.org/10.1049/iet-rpg.2012.0263
Abstract
Applying a land-based designed pitch controller on a floating wind turbine may cause severe instability. A common strategy to overcome this problem is to reduce the closed-loop bandwidth of the pitch control system. In doing so, the generator speed variation increases possibly leading to shutdowns because of overspeed. This study uses a parallel path modification to avoid instability without increasing the generator speed variation. The results of comprehensive simulations and load calculations carried out on a benchmark wind turbine are presented. These demonstrate that by using the proposed method it is possible to apply the land-based designed pitch controller on its floater-based equivalent.Keywords
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