Numerical Simulation of the Influence of Platform Pitch Motion On Power Generation Steadiness in Floating Offshore Wind Turbines

10 Pages Posted: 18 Sep 2017 Last revised: 13 Nov 2018

See all articles by Yehezkiel Tumewu

Yehezkiel Tumewu

University at Buffalo - Department of Civil, Structural & Environmental Engineering

Crescenzo Petrone

University College London - Department of Civil, Environmental & Geomatic Engineering

Mettupalayam Sivaselvan

University at Buffalo - Department of Civil, Structural & Environmental Engineering

Date Written: September 16, 2017

Abstract

Offshore wind energy is a valuable renewable resource that is inexhaustible, strong, and consistent. To reduce cost and improve energy production efficiency, future trends are moving towards wind turbines in deep water, which uses floating platforms such as tension leg platforms, barges, and semi-submersible designs. Compared to fixed based substructures, these floating platforms are in a state of constant motion which affects the power generation steadiness. The resulting complex dynamic behavior might compromise their efficiency and reduce their nominal life. The complex analysis of floating wind turbines requires computer tools that couple all the different components to represent the complete dynamic response. One such tool, developed by the National Renewable Energy Laboratory, is the aero-hydro-servo-elastic tool FAST. In this work, simplified models are used for three platform types, and the results are compared with FAST as a way of understanding the essential dynamics. Secondly, using FAST, the influence of platform pitch motion on the steadiness of power generation is examined. This analysis is done for all three platforms for a constant above rated wind speed and above average wave load. Results demonstrate that the power output fluctuation depends on the platform type and blade pitch motion. The effect of platform pitch on the steadiness of power output is only apparent under large oscillating pitch motion, where recurring power drops are observed. The semi-submersible design performs well with relatively steady power output, while the barge design has the most unsteady output, as a result of its susceptibility to typical wave loads.

Keywords: FAST; Floating Platform; Platform Pitch; Power Output; Wind Turbine

Suggested Citation

Tumewu, Yehezkiel and Petrone, Crescenzo and Sivaselvan, Mettupalayam, Numerical Simulation of the Influence of Platform Pitch Motion On Power Generation Steadiness in Floating Offshore Wind Turbines (September 16, 2017). International Journal of Environmental Science & Sustainable Development, Vol. 1, No. 2, 2017. Available at SSRN: https://ssrn.com/abstract=3037882

Yehezkiel Tumewu (Contact Author)

University at Buffalo - Department of Civil, Structural & Environmental Engineering ( email )

212 Ketter Hall
Buffalo, NY 14260
United States

Crescenzo Petrone

University College London - Department of Civil, Environmental & Geomatic Engineering ( email )

120 Chadwick Building UCL
London, WC1E 6BT
United Kingdom

Mettupalayam Sivaselvan

University at Buffalo - Department of Civil, Structural & Environmental Engineering ( email )

212 Ketter Hall
Buffalo, NY 14260
United States

Register to save articles to
your library

Register

Paper statistics

Downloads
56
Abstract Views
226
rank
366,872
PlumX Metrics