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Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator

He, Yu‐Ling; Yang, Pei‐Jie; Sun, Kai; Xu, Zhen‐Li; Wang, Hai‐Peng; He, Xian‐Long; Gerada, David


Yu‐Ling He

Pei‐Jie Yang

Kai Sun

Zhen‐Li Xu

Hai‐Peng Wang

Xian‐Long He

Principal Research Fellow in Electrical Machines


Shaft voltage often exists in synchronous generators due to the assembly error or various faults after the long‐term performance. The article investigates the shaft voltage characteristic under the stator interturn short circuit (SISC) condition. Different from other studies, this article mainly considers the mapping relationship between the amplitude–frequency characteristics of the shaft voltage and the SISC degrees. The detailed shaft voltage expressions are first derived based on the magnetic flux density under the normal condition and SISC condition. Then the finite element analysis and the experiment is studied on a CS‐5 prototype synchronous generator with two poles in order to validate the theoretical formula. The result shows that there is no shaft voltage in the normal condition, while the shaft voltage is generated obviously under the SISC condition. Meanwhile, the frequency component of the shaft voltage is mainly composed of odd harmonics including the first, third and fifth harmonics.


He, Y., Yang, P., Sun, K., Xu, Z., Wang, H., He, X., & Gerada, D. (2023). Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator. IET Electric Power Applications, 17(3), 381-391.

Journal Article Type Article
Acceptance Date Nov 22, 2022
Online Publication Date Dec 7, 2022
Publication Date 2023-03
Deposit Date Feb 11, 2023
Publicly Available Date Feb 13, 2023
Journal IET Electric Power Applications
Print ISSN 1751-8660
Electronic ISSN 1751-8679
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 17
Issue 3
Pages 381-391
Keywords asymmetrical magnetic flux density, shaft voltage, stator interturn short circuit, synchronous generator
Public URL
Publisher URL
Additional Information This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.


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