Environmental Engineering Reference
In-Depth Information
Chapter 6
Further Results on Modeling, Analysis,
and Control Synthesis for Offshore Wind
Turbine Systems
Hamid Reza Karimi and Tore Bakka
Abstract Renewable energy is a hot topic all over the world. Nowadays, there are
several sustainable renewable power solutions out there; hydro, wind, solar, wave,
and biomass to name a few. Most countries have a tendency to want to become
greener. In the past, all new wind parks were installed onshore. During the last
decade, more and more wind parks were installed offshore, in shallow water. This
chapter investigates a comparative study on the modeling, analysis, and control
synthesis for the offshore wind turbine systems. More specifically, an
H
1
static
output-feedback control design with constrained information is designed. Con-
strained information indicates that a remarkable performance can be achieved by
considering less information in the control loop or in the case of sensor failures in
practice. Therefore, a special structure is imposed on the static output-feedback
gain matrix in the contest of constrained information. A practical use of such an
approach is to design a decentralized controller for a wind turbine. This will also
benefit the controller in such a way that it is more tolerant to sensor failure.
Furthermore, the model under consideration is obtained by using the wind turbine
simulation software FAST. Using Linear Matrix Inequality
ðLMIÞ
method, some
sufficient conditions to design an
H
1
controller are provided. Finally, a com-
prehensive simulation study will be carried out to illustrate the effectiveness of the
proposed methodology for different cases of the control gain structures.
Keywords Wind turbine system
Control design
Modeling
Simulation
LMI
This work has been (partially) funded by Norwegian Centre for Offshore Wind Energy
(NORCOWE) under grant 193821/S60 from Research Council of Norway (RCN). NORCOWE
is a consortium with partners from industry and science, hosted by Christian Michelsen
Research.
