Mantencion Aerogeneradores
1
RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT) Yizhou Lu, T. M. Delorm, A. Christou INTRODUCTION: There are more than 20 designs of OWTs that are currently being deployed. However, there is a lack of reliability prediction data, which makes the selection of a specific OWT technology very risky. Global acceptance of OWTs will depend on achieving high reliable performance. STUDIES: • 5 Types of OWTs (Types1-4a) - horizontal axis turbines (3-6 MW) were selected for reliability modelling & technology comparison. • Develop a system-reliability comparison model as the basis for the comparison of the reliability of these 5 Types Surrogate failure rate data Onshore wind turbines (OT) 1-1.5MW CONCLUSIONS: • A methodology for analysing OWT in the early design phase, using surrogate data, has produced comparative reliability results. • These calculations have been done on the basis of one year’s operation as a non-repairable system, with no maintenance. • Failure rates are relatively high and survivor functions low (5-10% after one year) RESULTS: 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 Failure Rate Estimate λ i (Failures/year) Predicted Total Failure Rate (Failures/year) λi_FREcon = λGi_max Predicted total failure rate (Failures/year) λi_FREenv =λGi_max * πEi Comparison of a Drive Train sub- assemblies failure rates for Type 3 Turbine Design REFERENCES 1. RIAC & DACS. System Reliability Toolkit, A Practical Guide for Understanding and Implementing a Program for System Reliability. US Department of Defence, Arlington, VA, 2005. 2. Tavner, P. J., Faulstich, S. & van Bussel G. J. W. Reliability & availability of wind turbine electrical & electronic components. European Power Electronics and Drives Association (EPE) Journal, 20(4), 2010. 3. OREDA, Offshore Reliability Data Handbook. SINTEF Industrial Management. Det Norske Veritas, Norway, 1984- 2002. Comparison of survivor functions R(t) of drive-trains, after 1 year of operation, between Offshore Wind Turbine (OWT) vs. On-Shore Wind Turbine (WT) 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 R(t) Time operational t (hours) OWT_Type 1 OWT_Type 2 OWT_Type 3 OWT_Type 4 OWT_Type 4A WT_max WT_min
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Mantención de generadores eolicos, confiabilidad y otros.
Transcript of Mantencion Aerogeneradores
RELIABILITY COMPARISON MODELS
FOR OFFSHORE WIND TURBINES (OWT) Yizhou Lu, T. M. Delorm, A. Christou
INTRODUCTION: There are more than 20 designs of OWTs that are currently being deployed. However, there is a lack of reliability prediction data, which makes the selection of a specific OWT technology very risky. Global acceptance of OWTs will depend on achieving high reliable performance.
STUDIES: • 5 Types of OWTs (Types1-4a) - horizontal axis turbines (3-6 MW) were selected for reliability modelling & technology
comparison. • Develop a system-reliability comparison model as the basis for the comparison of the reliability of these 5 Types
Surrogate failure rate data Onshore wind turbines (OT) 1-1.5MW
CONCLUSIONS: • A methodology for analysing OWT in the early design phase, using surrogate data, has produced comparative
reliability results. • These calculations have been done on the basis of one year’s operation as a non-repairable system, with no
maintenance. • Failure rates are relatively high and survivor functions low (5-10% after one year)
RESULTS:
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
Failu
re R
ate
Estim
ate
λ i (F
ailu
res/
year
)
Predicted Total Failure Rate (Failures/year) λi_FREcon = λGi_max Predicted total failure rate (Failures/year) λi_FREenv =λGi_max * πEi
Comparison of a Drive Train sub-assemblies failure rates for Type 3 Turbine Design
REFERENCES 1. RIAC & DACS. System Reliability Toolkit, A Practical Guide for Understanding and Implementing a Program for
System Reliability. US Department of Defence, Arlington, VA, 2005. 2. Tavner, P. J., Faulstich, S. & van Bussel G. J. W. Reliability & availability of wind turbine electrical & electronic
components. European Power Electronics and Drives Association (EPE) Journal, 20(4), 2010. 3. OREDA, Offshore Reliability Data Handbook. SINTEF Industrial Management. Det Norske Veritas, Norway, 1984-
2002.
Comparison of survivor functions R(t) of drive-trains, after 1 year of operation, between Offshore Wind Turbine (OWT) vs. On-Shore Wind Turbine (WT)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 1000 2000 3000 4000 5000 6000 7000 8000 9000
R(t)
Time operational t (hours)
OWT_Type 1OWT_Type 2OWT_Type 3OWT_Type 4OWT_Type 4AWT_maxWT_min
