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Monitoring fatigue loads on wind turbines using cycle counting data acquisition systems

Abstract

As in any industrial application, the duration of a wind turbine`s life is a key parameter for the evaluation of its economic potential. Assuming a service life of 20 years, components of the turbine have to withstand a number of load cycles of up to 10{sup 8}. Such numbers of load cycles impose high demands on the fatigue characteristics of both, the used materials and the design. Nevertheless, fatigue loading of wind turbine components still remains a parameter of high uncertainty in the design of wind turbines. The specific features of these fatigue loads can be expected to vary with the type of turbine and the site of operation. In order to ensure the reliability of the next generation of larger scale wind turbines improved load assumptions will be of vital importance. Within the scope of the presented research program DEWI, C.R.E.S. and FFA monitored fatigue loads of serial produced wind turbines by means of a monitoring method that uses on-line cycle counting techniques. The blade root bending moments of two pitch controlled, variable speed wind turbines operating in the Hamswehrum wind farm, and also that of a stall controlled, fixed speed wind turbine operating in CRES` complex terrain test  More>>
Authors:
Soeker, H; Seifert, H; [1]  Fragoulis, A; Vionis, P; Foussekis, D; [2]  Dahlberg, J A; Poppen, M [3] 
  1. Deutsches Windenergie-Institut (Germany)
  2. Center for Renewable Energy Sources (Greece)
  3. The Aeronautical Research Institue of Sweden (Sweden)
Publication Date:
Sep 01, 1996
Product Type:
Conference
Report Number:
NEI-DK-2424; CONF-960267-
Reference Number:
SCA: 170602; PA: DK-96:001568; EDB-96:126079; SN: 96001645498
Resource Relation:
Conference: 11. International Energy Agency (IEA) research and development wind annex, Stuttgart (Germany), 1-2 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of IEA Joint Action. Wind turbine fatigue; Maribo Pedersen, B. [ed.]; PB: 108 p.
Subject:
17 WIND ENERGY; DATA ACQUISITION SYSTEMS; FATIGUE; WIND TURBINES; WIND LOADS; TIME-SERIES ANALYSIS; PERFORMANCE TESTING; STRESS ANALYSIS
OSTI ID:
276954
Research Organizations:
Danmarks Tekniske Univ., Lyngby (Denmark). Afd. for Fluid Mekanik
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE96777162; TRN: DK9601568
Availability:
OSTI as DE96777162
Submitting Site:
DK
Size:
pp. 50-53
Announcement Date:

Citation Formats

Soeker, H, Seifert, H, Fragoulis, A, Vionis, P, Foussekis, D, Dahlberg, J A, and Poppen, M. Monitoring fatigue loads on wind turbines using cycle counting data acquisition systems. Denmark: N. p., 1996. Web.
Soeker, H, Seifert, H, Fragoulis, A, Vionis, P, Foussekis, D, Dahlberg, J A, & Poppen, M. Monitoring fatigue loads on wind turbines using cycle counting data acquisition systems. Denmark.
Soeker, H, Seifert, H, Fragoulis, A, Vionis, P, Foussekis, D, Dahlberg, J A, and Poppen, M. 1996. "Monitoring fatigue loads on wind turbines using cycle counting data acquisition systems." Denmark.
@misc{etde_276954,
title = {Monitoring fatigue loads on wind turbines using cycle counting data acquisition systems}
author = {Soeker, H, Seifert, H, Fragoulis, A, Vionis, P, Foussekis, D, Dahlberg, J A, and Poppen, M}
abstractNote = {As in any industrial application, the duration of a wind turbine`s life is a key parameter for the evaluation of its economic potential. Assuming a service life of 20 years, components of the turbine have to withstand a number of load cycles of up to 10{sup 8}. Such numbers of load cycles impose high demands on the fatigue characteristics of both, the used materials and the design. Nevertheless, fatigue loading of wind turbine components still remains a parameter of high uncertainty in the design of wind turbines. The specific features of these fatigue loads can be expected to vary with the type of turbine and the site of operation. In order to ensure the reliability of the next generation of larger scale wind turbines improved load assumptions will be of vital importance. Within the scope of the presented research program DEWI, C.R.E.S. and FFA monitored fatigue loads of serial produced wind turbines by means of a monitoring method that uses on-line cycle counting techniques. The blade root bending moments of two pitch controlled, variable speed wind turbines operating in the Hamswehrum wind farm, and also that of a stall controlled, fixed speed wind turbine operating in CRES` complex terrain test site, were measured by DEWI and CRES. In parallel FFA used their database of time series measurements of blade root bending moments on a stall controlled, fixed speed turbine at Alsvik Windfarm in order to derive semi-empirical fatigue load data. The experience gained from application of the on-line measurement technique is discussed with respect to performance, data quality, reliability and cost effectiveness. Investigations on the effects of wind farm and complex terrain operation on the fatigue loads of wind turbine rotor blades are presented. (au)}
place = {Denmark}
year = {1996}
month = {Sep}
}