Picture map of Europe with pins indicating European capital cities

Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

Explore research outputs by the European Policies Research Centre...

An electro-thermal analysis of a variable-speed doubly-fed induction generator in a wind turbine

Qiu, Yingning and Zhang, Wenxiu and Cao, Mengnan and Feng, Yanhui and Infield, David (2015) An electro-thermal analysis of a variable-speed doubly-fed induction generator in a wind turbine. Energies, 8 (5). pp. 3386-3402. ISSN 1996-1073

[img]
Preview
Text (Qiu-etal-E2015-electro-thermal-analysis-variable-speed-doubly-fed-induction-generator)
Qiu_etal_E2015_electro_thermal_analysis_variable_speed_doubly_fed_induction_generator.pdf - Final Published Version
License: Creative Commons Attribution 4.0 logo

Download (653kB) | Preview

Abstract

This paper focuses on the electro-thermal analysis of a doubly-fed induction generator (DFIG) in a wind turbine (WT) with gear transmission configuration. The study of the thermal mechanism plays an important role in the development of cost-effective fault diagnostic techniques, design for reliability and premature failure prevention. Starting from an analysis of the DFIG system control and its power losses mechanism, a model that synthesizes the thermal mechanism of the DFIG and a WT system principle is developed to study the thermodynamics of generator stator winding. The transient-state and steady-state temperature characteristics of stator winding under constant and step-cycle patterns of wind speed are studied to show an intrinsic thermal process within a variable-speed WT generator. Thermal behaviors of two failure modes, i.e., generator ventilation system failure and generator stator winding under electric voltage unbalance, are examined in details and validated by both simulation and data analysis. The effective approach presented in this paper for generator fault diagnosis using the acquired SCADA data shows the importance of simulation models in providing guidance for post-data analysis and interpretation. WT generator winding lifetime is finally estimated based on a thermal ageing model to investigate the impacts of wind speed and failure mode.