Impact of Radial Air-Gap Eccentricity on Stator End Winding Vibration Characteristics in DFIG

Ming-Xing Xu; Yu-Ling He; Wen Zhang; De-Rui Dai; Xiang-Ao Liu; Wen-Jie Zheng; Shu-Ting Wan; David Gerada; Shan-Zhe Shi

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2023.35477

Published Article

LAPSE:2023.35477

Impact of Radial Air-Gap Eccentricity on Stator End Winding Vibration Characteristics in DFIG

Ming-Xing Xu, Yu-Ling He, Wen Zhang, De-Rui Dai, Xiang-Ao Liu, Wen-Jie Zheng, Shu-Ting Wan, David Gerada, Shan-Zhe Shi

April 28, 2023

In this paper, qualitative theoretical derivations, finite element analysis (FEA) and experiments are used to investigate the electromagnetic force (EF) and vibration characteristics of end windings. In contrast to previous studies, this study focuses not only on end winding EF/vibration under normal and radial static air gap eccentricity (RSAGE) conditions, but also for the cases of radial dynamic air gap eccentricity (RDAGE) and radial dynamic static hybrid air gap eccentricity (RHAGE). Firstly, the magnetic flux density (MFD) is derived for normal and radial air gap eccentricity (RAGE) faults, and detailed EF expressions are obtained before and after the RAGE fault. The finite element analysis (FEA) and experimental studies were performed on a four-pole DFIG at a speed of 1500 rpm to verify the proposed theoretical analysis. It is shown that RSAGE only enlarges the EF/end winding vibration and does not introduce new frequency components. RDAGE not only increases EF/end winding vibration but also introduces new frequency components. RHAGE can be seen as a superimposed effect of RSAGE and RDAGE.

Record ID

LAPSE:2023.35477

Keywords

doubly fed induction generator (DFIG), electromagnetic force (EF), end winding vibration, radial air gap eccentricity (RAGE)

Subject

Electricity & Electrical Devices

Suggested Citation

Xu MX, He YL, Zhang W, Dai DR, Liu XA, Zheng WJ, Wan ST, Gerada D, Shi SZ. Impact of Radial Air-Gap Eccentricity on Stator End Winding Vibration Characteristics in DFIG. (2023). LAPSE:2023.35477

Author Affiliations

Xu MX: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
He YL: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China [ORCID]
Zhang W: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Dai DR: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Liu XA: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Zheng WJ: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Wan ST: Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University, Baoding 071003, China
Gerada D: Power Electronics, Machines and Control Group, University of Nottingham, Nottingham NG7 2RD, UK
Shi SZ: State Grid Hebei Electric Power Company, Shijiazhuang 050022, China

Journal Name

Energies

Volume

15

Issue

17

First Page

6426

Year

2022

Publication Date

2022-09-02