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Copyright © TWI Ltd 2014
Jesus Antonio Jimenez, Slim Soua, Antonio Romero and Tat-Hean Gan
Development of Acoustic Emission signature for the Assessment of Wind Turbine drive train
ECNDT Conference Prague, Czech Republic
07th October 2014
11th European Conference on Non-Destructive Testing (ECNDT 2014), October 6-10, 2014, Prague, Czech Republic
Copyright © TWI Ltd 2014
Index
1.Introduction
2.Tests Description
3.Results
4.Conclusions and further work
Copyright © TWI Ltd 2014
Index
1.Introduction
2.Tests Description
3.Results
4.Conclusions and further work
Copyright © TWI Ltd 2014
Condition monitoring of Wind Turbine Machinery Critical components in Wind Turbine Machinery
Generator
Rotor system
Gearbox
1. Introduction
Generator
24%
Rotor System
incl. hub
20% Drive Train
Incl. Gearbox
13%
Control system
11%
Hydraulic
System
9%
Yaw System
8%
Transformer,
Circuit Breaker
6%
Pitch System
4% Other
5%
CMSWind system
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Acoustic
Emission
Condition monitoring of Wind Turbine Machinery
Current monitoring techniques
Higher frequency range (10 kHz – 1MHz)
Very early developed damage
Ineffective lubrication
Slow rotating machinery
Background noise
Quantitative data
1. Introduction
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Condition monitoring of Wind Turbine Machinery
Current monitoring techniques limitations
1. Introduction
CMSWind
MCSA
AE
OMA
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Acoustic
Emission
1. Introduction
Vibration
Analysis
MCSA
Reliability Level
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Index
1.Introduction
2.Tests description
3.Results
4.Conclusions and further work
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Initial Tests for wireless data acquisition hardware and software validation.
2. Tests Description
Initial Acoustic emission waveforms gathered using wireless nodes
Pencil Lead Break test description (10)
AE Wireless nodes
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2. Tests Description
WINDMASTER 300
300 kW rated maximum power output 1515 rpm nominal speed for the high speed shaft
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2. Tests Description
WINDMASTER 300 test rig
0-30 kW rated maximum power output 0-1515 rpm nominal speed for the high speed shaft
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2. Tests Description
Variable
frequency
drive
Motor Power
Grid
Reduction
gearbox
Wind Turbine
Hub
Nacelle test rig working diagram
Wind Turbine
Blades
Multiplication
Gearbox
Wind
Energy Generator Power Grid
Wind Turbine Normal Operation
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2. Tests Description
Variable
frequency
drive
Motor Power
lines
Reduction
gearbox
Wind Turbine
Hub
Nacelle test rig working diagram
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2. Tests Description
Low speed shaft AE
sensor location
High speed shaft AE
sensor location
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2. Tests Description
Baseline generation
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AE waveform features description (12)
2. Tests Description
Baseline generation
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2. Tests Description
Baseline generation software
Mean of AE VRMS ±σ for each speed BIN
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Index
1.Introduction
2.Tests Description
3.Results
4.Conclusions and further work
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3. Results
Low Speed Shaft AE VRMS ±σ signature
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3. Results
High Speed Shaft AE VRMS ±σ signature
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3. Results
Comparison AE VRMS ±σ signature Low-High Speed Shaft
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Index
1.Introduction
2.Tests Description
3.Results
4.Conclusions and further work
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The AE module has been implemented in a test wind turbine in order to validate the system and evaluate the applicability of the technique.
Data has been gathered sensing both the low and high speed shafts of the wind turbine.
There is a correlation between the AE VRMS level and the rotational speed.
AE VRMS is not similar for both shafts at same speed.
4. Conclusions
50 rpm
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AE VRMS. Implementation of different signal features, ASL, Energy.
Validation of algorithms and software architecture
Definition of alarm levels by the introduction of progressive artificial defects
Long term monitoring for technique validation
Integration of subsystems
4. Further Work
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www.cmswind.eu
Acknowledgements
The investigations and results presented have been obtained from CMSWind [1] Project, which is a European Research & Development Project partly funded under the FP7 Framework Research for SME Associations under Grant Agreement Number 286854.
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Q&A
Thank you
Jesus Antonio Jimenez
TWI Ltd
Phone: +44 (0)1223 899000 ext (9167)
