Publications

Skip Navigation Links.
Recently Published
Collapse per documenttypeper documenttype
Collapse ECN publicationECN publication
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
1979
1977
Expand BookBook
Expand ArticleArticle
Expand Article (scientific)Article (scientific)
Expand Conference PaperConference Paper
Expand PresentationPresentation
Expand OtherOther
Expand External memoExternal memo
Expand LeafletLeaflet
Expand per Unitper Unit
Expand per Clusterper Cluster

Search for publications:


Limit search to the fields

ECN publication
Title:
Betrouwbaarheidsanalyse NedWind 40
 
Author(s):
Smet, B.J. de; Rademakers, L.W.M.M.; Goezinne, F.
 
Published by: Publication date:
ECN 1996
 
ECN report number: Document type:
ECN-C--96-051 ECN publication
 
Number of pages: Full text:
39 Download PDF  

Abstract:
The experiences with reliability analysis techniques are presented forthe case study: 'NedWind 40: Reliability Analysis and Maintenance Procedures'. Also methods to collect failure and maintenance data are discussed. The reliability analysis techniques are described only briefly because they were performed in accordance with the practical guidelines for the assessment of wind turbine safety, as drafted in the Joule-II project 'European Wind Turbine Standards'. The analysis showed that these guidelines are suitable to obtain good results. The analysis procedure comprises the following steps: (1) description of the wind turbine, its main systems, and the operational procedures; (2) performance of event sequence analysis; (3) performance of Failure Modes, Effects, and Criticality Analysis (FMECA); (4) system modelling; and (5) quantification of system model and event sequences. The analysis revealed that performing the FMECA is the crucial step in reliability analysis. Because of this fact, NedWind wants to implement the FMECA in their 'design reviews' of new wind turbines. The analysis gives a lot of additional insight in the failure behaviour of the systems. The quantitative part of the reliability analysis was performed successfully with generic data from handbooks instead of specific wind turbine failure data, because the operational experience of the NedWind 40 was too short. Furthermore, the maintenance sheets did not contain all the information that was needed for a detailed quantitative analysis. The quantitative analysis showed that the NedWind 40 is a reliable and safe wind turbine. A general conclusion is that the availability of control and protection systems can be improved by applying monitoring, rather then applying components, with a higher reliability. In order to collect the necessary failure and maintenance data, a failure registration sheet was developed, together with a database structure for data storage. Analysis techniques for the failure and maintenance data were discussed briefly. 2 figs., 8 tabs.


Back to List