Details
| Original language | English |
|---|---|
| Pages (from-to) | 3835-3855 |
| Number of pages | 21 |
| Journal | ENERGIES |
| Volume | 5 |
| Issue number | 10 |
| Publication status | Published - 8 Oct 2012 |
Abstract
The main contributing factors to unsteady loading of Offshore Wind Turbines (OWT) are wind shear, turbulence, and waves. In the present paper, the turbulence intensity and the wind shear exponent are investigated. Using data from the FINO 1 research platform, these parameters are analyzed and compared with the proposed wind field parameters in the IEC standard 61400-3. Based on this analysis, aeroelastic simulations are performed to determine the effect of wind field parameters on the fatigue and the extreme loads on the rotor blades. For the investigations, the aeroelastic model of a 5 MW OWT is used with a focus on design load cases in an operating state (power production). The fatigue loads are examinedby means of the damage-equivalent load-range approach. In order to determine the extreme loads with a recurrence period of 50 years, a peak over threshold extrapolation method and a novel method based on average conditional exceedance ratesare used. The results show that the requirements of the IEC standard are very conservative for the design of the rotor blades. Therefore, there could be a large optimization potential for the reduction of weight and cost of the rotor blades.
Keywords
- Extreme loads, Fatigue loads, Turbulence intensity, Wind shear exponent
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Energy Engineering and Power Technology
- Energy(all)
- Energy (miscellaneous)
- Mathematics(all)
- Control and Optimization
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: ENERGIES, Vol. 5, No. 10, 08.10.2012, p. 3835-3855.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigation of Site-Specific Wind Field Parameters and Their Effect on Loads of Offshore Wind Turbines
AU - Ernst, Benedikt
AU - Seume, Jörg R.
PY - 2012/10/8
Y1 - 2012/10/8
N2 - The main contributing factors to unsteady loading of Offshore Wind Turbines (OWT) are wind shear, turbulence, and waves. In the present paper, the turbulence intensity and the wind shear exponent are investigated. Using data from the FINO 1 research platform, these parameters are analyzed and compared with the proposed wind field parameters in the IEC standard 61400-3. Based on this analysis, aeroelastic simulations are performed to determine the effect of wind field parameters on the fatigue and the extreme loads on the rotor blades. For the investigations, the aeroelastic model of a 5 MW OWT is used with a focus on design load cases in an operating state (power production). The fatigue loads are examinedby means of the damage-equivalent load-range approach. In order to determine the extreme loads with a recurrence period of 50 years, a peak over threshold extrapolation method and a novel method based on average conditional exceedance ratesare used. The results show that the requirements of the IEC standard are very conservative for the design of the rotor blades. Therefore, there could be a large optimization potential for the reduction of weight and cost of the rotor blades.
AB - The main contributing factors to unsteady loading of Offshore Wind Turbines (OWT) are wind shear, turbulence, and waves. In the present paper, the turbulence intensity and the wind shear exponent are investigated. Using data from the FINO 1 research platform, these parameters are analyzed and compared with the proposed wind field parameters in the IEC standard 61400-3. Based on this analysis, aeroelastic simulations are performed to determine the effect of wind field parameters on the fatigue and the extreme loads on the rotor blades. For the investigations, the aeroelastic model of a 5 MW OWT is used with a focus on design load cases in an operating state (power production). The fatigue loads are examinedby means of the damage-equivalent load-range approach. In order to determine the extreme loads with a recurrence period of 50 years, a peak over threshold extrapolation method and a novel method based on average conditional exceedance ratesare used. The results show that the requirements of the IEC standard are very conservative for the design of the rotor blades. Therefore, there could be a large optimization potential for the reduction of weight and cost of the rotor blades.
KW - Extreme loads
KW - Fatigue loads
KW - Turbulence intensity
KW - Wind shear exponent
UR - http://www.scopus.com/inward/record.url?scp=84868258919&partnerID=8YFLogxK
U2 - 10.3390/en5103835
DO - 10.3390/en5103835
M3 - Article
AN - SCOPUS:84868258919
VL - 5
SP - 3835
EP - 3855
JO - ENERGIES
JF - ENERGIES
SN - 1996-1073
IS - 10
ER -