Analysis and design of a tower motion estimator for wind turbines

W. H. Lio, B. Ll Jones, J. A. Rossiter

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The use of blade individual pitch control (IPC) provides a means of alleviating the harmful turbine loads that arise from the uneven and unsteady forcing from the oncoming wind. Such IPC algorithms, which mainly target the blade loads at specific frequencies, are designed to avoid excitations of other turbine dynamics such as the tower. Nonetheless, these blade and tower interactions can be exploited to estimate the tower movement from the blade load sensors. As a consequence, the aim of this paper is to analyse the observability properties of the blade and tower model and based on these insights, an estimator design is proposed to reconstruct the tower motion from the measurements of the flap-wise blade loads, that are typically available to the IPC. The proposed estimation strategy offers many immediate benefits, for example, the estimator eliminates the need for a motion sensor on the tower, and the estimated signals can be used for control or fault monitoring purposes. We further show results obtained from high-fidelity turbine simulations to demonstrate the performance of the proposed estimator.
Original languageEnglish
Title of host publication5th International conference on renewable energy research and application
Publication date2016
Pages655-660
Publication statusPublished - 2016
Externally publishedYes
Event5 th International conference on renewable energy research and application - Birmingham, United Kingdom
Duration: 20 Nov 201623 Nov 2016

Conference

Conference5 th International conference on renewable energy research and application
CountryUnited Kingdom
CityBirmingham
Period20/11/201623/11/2016
Series... International Conference on Renewable Energy Research and Applications
ISSN2377-6897

Cite this

Lio, W. H., Jones, B. L., & Rossiter, J. A. (2016). Analysis and design of a tower motion estimator for wind turbines. In 5th International conference on renewable energy research and application (pp. 655-660). ... International Conference on Renewable Energy Research and Applications