Pitch Angle Regulation of Floating Wind Turbines with Dynamic Uncertainty and External Disturbances
This paper addresses the problem of pitch angle regulation of floating wind turbines with the presence of dynamic uncertainty and unknown disturbances usually encountered in offshore wind turbines, where two control laws are derived for two different cases to continuously achieve zero pitch ang...
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| Format: | Article |
| Language: | English |
| Published: |
College of Engineering, University of Basrah
2015-06-01
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| Series: | Iraqi Journal for Electrical and Electronic Engineering |
| Online Access: | http://ijeee.org/volums/volume7/IJEEE7PDF/Paper79.pdf |
| Summary: | This paper addresses the problem of pitch angle
regulation of floating wind turbines with the presence of
dynamic uncertainty and unknown disturbances usually
encountered in offshore wind turbines, where two control laws
are derived for two different cases to continuously achieve zero
pitch angle for the floating turbine. In the first case, the timevarying
unknown coefficients that characterize the turbine's
dynamics are assumed reasonably bounded by known functions,
where robust controller is designed in terms of these known
functions to achieve zero pitch angle for the turbine with
exponential rate of convergence. While in the second case, the
turbine's dynamics are considered to be characterized by
unknown coefficients of unknown bounds. In this case, a slidingmode
adaptive controller is constructed in terms of estimated
values for the unknown coefficients, where these values are
continuously updated by adaptive laws associated with the
proposed controller to ensure asymptotic convergence to zero
for the turbine's pitch angle. Simulations are performed to
demonstrate the validity of the proposed controllers to achieve
the required regulation objective. |
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| ISSN: | 1814-5892 2078-6069 |