optimization of the sensor network use current situation on a wind turbine (wt), hundreds of sensors...
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Optimization of the sensor network use
Current situationOn a wind turbine (WT), hundreds of sensors are found at different location and used for control and performance optimization, but also condition-based maintenance. Unfortunately, a high number of sensors leads to more complexity in the analysis.
A reasoning system can improve the data analysis
First findingThe current working state can be identified with only six sensors: wind speed, ambient temperature, pitch angle, yaw angle, power output, rotational speed.
The reasoning system building is in progress!
Availability is a critical issue for offshore wind farms
The availability is a function of machine properties, site accessibility and maintenance strategy:
Design for reconfiguration
If a minor failure occurs, the wind turbine may be able to work anyway. A function of the wind turbine may be carried out in a different way, until the failure is repaired. During that period, the efficiency and the performance of the wind turbine are usually lower than during the normal operation mode.
This part of the thesis has not been started yet.
Availability-based design optimization of offshore
wind farm
IEA Wind Task 33 on Reliability dataI am involved in a task group, with Fraunhofer IWES, Sandia National Laboratories, Chalmers University, China Wind Energy Association, DTU, Vattenfall, etc.The purpose is to improve the “Standardization of data collection for wind turbine reliability and maintenance analyses”.
Publications- C.G.F. Boussion, G.J.W van Bussel, “Optimization of the information needed for wind turbine health monitoring”, International Workshop on Structure Health
Monitoring 2013, Stanford University, Stanford CA, USA, to be published
PhD Candidate: Cyril BoussionDepartment: AWEPSection: Wind EnergySupervisor: G. van BusselPromoter: G. van BusselStart date: 01-02-2012Funding: FLOW
Aero
space
En
gin
eeri
ng
Reliabilityfailures/year
Maintainabilityease of repair
Serviceabilityease of service
Theoretical availability
Accessibility to the site
Real availability
Maintenance strategy
The availability of a wind turbine is the
percentage of time it is mechanically able to produce electricity.
Examples of maintenance operations on offshore wind turbines(source: Areva, Siemens)
Background and aimOffshore wind is a promising energy resource in order to face the climate change and to reduce the gas emissions. Over the last decade, this sector has experienced a very rapid growth, wind turbines have become powerful and wind parks bigger. However, the availability of the wind farms is still low, the costs for a repair are increasing and the loss of energy is high if a turbine stops.This research aims to find ways to increase the availability of offshore wind farms.
+ Low accessibility + Harsh environment + High travel time + …Þ Low availabilityÞ High O&M costs
Wind turbine working and
healthy
Pitch system fails, turbine
stopped
Reconfiguration:Stall control
instead of pitch control
Wind turbine working but not
healthy
The pitch system is repaired by the
maintenance crew
Example of reconfiguration
Progress and objectivesProgress in the PhD: The GO decision was taken last December.
The first conference presentation will be done next September at Stanford University, Stanford CA, USA.Next step in the research: Include new sensors in the reasoning system and test it with real data.
Start the reconfiguration part.