Optimal mode-switching and control synthesis for floating offshore wind turbines

Behrooz Shahsavari, Omid Bagherieh, Negar Mehr, Roberto Horowitz, Claire Tomlin

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper proposes a multi-objective optimal control and switching strategy for floating offshore wind turbines when the wind speed can be approximately predicted. The system is modeled as a hybrid automaton with two modes corresponding to the turbine operation in low- and high-speed wind profiles. The main control objective in the low-speed wind mode is to maximize the total captured power in a finite time horizon, whereas in the high-speed mode, it is desired to regulate the generator torque and speed around predefined rated values even under gust loads. The problem is formulated as a constrained mixed-integer bilinear program in a model predictive control framework. The posed constraints correspond to the electrical/mechanical limitations of the blade actuators and generators. Various practical considerations, such as minimizing the number of switching occurrences and mechanical fatigue prevention, are explicitly considered in the optimization problem. The proposed control method is applied to the dynamical model of a real wind turbine and simulation results are presented.

Original languageEnglish (US)
Title of host publication2016 American Control Conference, ACC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781467386821
StatePublished - Jul 28 2016
Externally publishedYes
Event2016 American Control Conference, ACC 2016 - Boston, United States
Duration: Jul 6 2016Jul 8 2016

Publication series

NameProceedings of the American Control Conference
ISSN (Print)0743-1619


Other2016 American Control Conference, ACC 2016
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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