ANALYSIS OF INFLUENCE OF WIND SPEED DISTIRBUTION DIFFERENCE ON WINDING ASYMMETRIC FAULT CHARACTERISTICS OF DOUBLY-FED INDUCTION GENERATOR

Sheng Xiaoling; Cheng Ziyao; Han Xuchao; Wang Tianxiang; Wan Shuting; Zhang Xiong

doi:10.19912/j.0254-0096.tynxb.2024-0972

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 618-627. DOI: 10.19912/j.0254-0096.tynxb.2024-0972

ANALYSIS OF INFLUENCE OF WIND SPEED DISTIRBUTION DIFFERENCE ON WINDING ASYMMETRIC FAULT CHARACTERISTICS OF DOUBLY-FED INDUCTION GENERATOR

Sheng Xiaoling¹, Cheng Ziyao¹, Han Xuchao², Wang Tianxiang¹, Wan Shuting¹, Zhang Xiong¹

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Abstract

In order to accurately characterize the winding asymmetry fault in a doubly-fed induction generator, this study investigates the effect of spatio-temporal wind speed variations （caused by wind shear and tower shadow） based on actual wind conditions across the rotor swept area. Firstly an equivalent wind speed mode that accounts for the spatio-temporal variations of wind speed was develop-ed, and investigates the corresponding stator current characteristics based on this model was investigated. It then analyzes the impact of key wind speed distribution parameters, including the wind shear exponent, tower radius, and hub offset, on the stator current behavior. Also the influence of wind speed distribution difference parameters （wind shear index, tower radius and center distance） on the stator current characteristics was analyzed. Subsequently, simulation verification was conducted using the MATLAB/Simulink platform, and experimental verification was performed on a doubly-fed wind turbine fault simulation platform. The results show that, compared with the existing fault characteristics based on the average wind speed at the hub, the modulation frequencies of 3kP （k is an integer, P is the rotation frequency） appear on both sides of the stator current fundamental frequency and its third harmonic when wind speed spatio-temporal distribution differences are considered. Different wind speed distribution parameters affect these characteristic frequencies to varying degrees. The research results improve the fault diagnosis theory system of doubly-fed wind turbines and have a certain theoretical significance for practical fault diagnosis.

Key words

wind turbine generator / fault diagnosis / wind speed / winding asymmetry / doubly-fed wind turbine

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Sheng Xiaoling, Cheng Ziyao, Han Xuchao, Wang Tianxiang, Wan Shuting, Zhang Xiong. ANALYSIS OF INFLUENCE OF WIND SPEED DISTIRBUTION DIFFERENCE ON WINDING ASYMMETRIC FAULT CHARACTERISTICS OF DOUBLY-FED INDUCTION GENERATOR[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 618-627 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0972

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