Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault

Yuan Xing-hua; Qiu Ming-hao; Jiang Meng-ya; He Yu-ling; Wan Shu-ting; Tang Gui-Ji

doi:doi:10.11648/j.ijecec.20220801.11

| Peer-Reviewed

Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault

Yuan Xing-hua, Qiu Ming-hao, Jiang Meng-ya, He Yu-ling, Wan Shu-ting, Tang Gui-Ji

Published in International Journal of Electrical Components and Energy Conversion (Volume 8, Issue 1)

Received: 4 June 2022 Accepted: 24 June 2022 Published: 5 July 2022

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Abstract

Rotor interturn short circuit (RISC) is a common electrical fault in synchronous generators. By far, scholars have carried out a lot of researches on static rotor interturn short circuit (SRISC), while dynamic rotor interturn short circuit (DRISC) is rarely taken into account. This paper analyzes the stator current characteristics before and after DRISC fault in synchronous generators. First, the expressions of the air-gap flux density respectively in normal, SRISC, and DRISC cases, are derived. Then the two-dimensional finite element model is established to analyze the stator current under the aforementioned three conditions. Finally, experiments are carried out on the CS-5 prototype generator to test the stator currents. The experimental results are consistent with the theoretical analysis and the finite element calculation data. It is shown that the occurrence of the dynamic rotor interturn short circuit will reduce the root mean square value as well as the odd harmonics of the magnetic flux density and the stator current, while at the meantime it will increase the new generated even harmonics. Compared with the static short circuit, the current curve of the stator phase shows an obvious "peak". With the aggravation of the short circuit degree between dynamic turns, the effective value of current and the odd harmonics will be decreased. The stator current in the dynamic rotor interturn short circuit cases is generally between those of normal condition and static rotor interturn short circuit case.

Published in	International Journal of Electrical Components and Energy Conversion (Volume 8, Issue 1) This article belongs to the Special Issue Electro-Mechanical Coupling Problems in Electric Machines
DOI	10.11648/j.ijecec.20220801.11
Page(s)	1-8
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Synchronous Generator, Dynamic Rotor Interturn Short Circuit, Stator Current, Air-Gap Flux Density

References

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[2]	BAN Guo-bang, LI Yong-gang, ZHAO Li-jin, LI Xiao-jun. Research on joint diagnostic methods of dynamic rotor winding inter-turn short circuit fault based on the electromagnetic properties [J] Journal of North China Electric Power University, 2014, 41 (03): 32-35.
[3]	Gandhi, A., Corrigan, T., Parsa, L. Recent Advances in Modeling and Online Detection of Stator Interturn Faults in Electrical Motors [J]. IEEE Transactions on Industrial Electronics, 2011, 58 (5): 1564-1575.
[4]	Cameron A. W. W. Diagnoses of A-C Generator Insulation Condition by Nondestructive Tests includes discussion [J]. Power Apparatus and Systems, Part III: Transactions of the American Institute of Electrical Engineers, 1952, 71 (1): 263-269.
[5]	Zhang Chao, Xia Li, Wu Zhenguo, etc. Distinguishing stator winding inter-turn short-circuit from asymmetrical operation of synchronous generator [J]. Electric Power Automation Equipment, 2011, 31 (04): 41-46.
[6]	HAO Liangliang, WU Junyong, CHEN Zhanfeng, SONG Honglei. Mechanism of Effects of Inter-turn Short Circuits in Field Windings on large Turbo-generator Viberation. [J]. Automation of Electric Power Systems, 2014, 38 (04): 25-31+50.
[7]	ZHANG Zhengping, LIU Shi. Online diagnosis of interturn short circuit for large turbine generator’s rotor. [J]. Electric Power Automation Equipment, 2012, 32 (08): 148-152.
[8]	ZHANG Chao, XIA Li, WU Zheng-guo, HUANG Hai, WANG Jia-lin. Analysis on Fault Characteristics Law of Interturn Short Circuit in Synchronous Generator Rotor Winding. [J]. High Voltage Engineering, 2010, 36 (06): 1506-1512.
[9]	ZHAO Hong-sen, GE Bao-jun, TAO Da-jun, YANG Kun, XING Guang. Investigation on Stator Winding Inter-turns Short Circuit Fault Diagnosis [J]. Journal of Harbin University of Science and Technology, 2018, 23 (01): 99-104.
[10]	LI Yong-gang, LI He-ming, ZHAO Hua. The new criterion on inter turn short-circuit fault diagnose of steam turbine generator rotor windings. [J]. Proceedings of the CSEE, 2003 (06): 112-116+169.
[11]	Q. Bin, X. Wei, L. Nian, et al. Theoretical research on short circuit fault of rotor inner winding in large turbo generator [C] IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society. IEEE, 2012: 6218-6223.
[12]	HE Yuling. Analysis on Mechanical and Electrical Characteristics of Generator under Air-Gap Eccentricity and Winding Short Circuit Composite Faults. [D]. North China Electric Power University, 2012.
[13]	W. Shuting., W. Aimeng, L. Yonggang, et al. Reluctance network model of turbo-generator and its application in rotor winding inter-turn short circuit fault [C] IEEE International Conference on Electric Machines and Drives. IEEE, 2005: 386-390.
[14]	CHENG Wei-liang, XU Bo-hou, HUANG Lei. Vibration analysis of stator winding end baskets of large turbo- generator [J]. Journal of Zhejiang University (Engineering Science), 2010, 44 (08): 1558-1561.
[15]	WU Yu-cai, LI Yong-gang, LI He-ming, etc. Analysis of Turbine Generator Rotor Vibration Characterisitc Under Electromechanical Compound Faults. [J]. High Voltage Engineering, 2010, 36 (11): 2687-2692.
[16]	J. Li, L. Zhang and W. Shi, Fault characteristics of the DFIG rotor inter-turn short circuit considering inherent imbalance and static eccentricity, 2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015: 971-975.
[17]	D. R. Albright. Interturn Short-Circuit Detector for Turbine- Generator Rotor Windings [J]. IEEE Transactions on Power Apparatus and Systems, 1971, PAS-90 (2): 478-483.
[18]	G. J. Li et al. Excitation Winding Short-Circuits in Hybrid Excitation Permanent Magnet Motor [J]. IEEE Transactions on Energy Conversion, 2014, 2014, 29 (3): 567-575.
[19]	Yu-Ling He, etc. Analysis and simulation on the effect of rotor interturn short circuit on magnetic flux density of turbo–generator. [J]. Journal of Electrical Engineering- Elektrotechnicky Casopis, 2016, 67 (5): 323-333.

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APA Style

Yuan Xing-hua, Qiu Ming-hao, Jiang Meng-ya, He Yu-ling, Wan Shu-ting, et al. (2022). Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault. International Journal of Electrical Components and Energy Conversion, 8(1), 1-8. https://doi.org/10.11648/j.ijecec.20220801.11

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ACS Style

Yuan Xing-hua; Qiu Ming-hao; Jiang Meng-ya; He Yu-ling; Wan Shu-ting, et al. Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault. Int. J. Electr. Compon. Energy Convers. 2022, 8(1), 1-8. doi: 10.11648/j.ijecec.20220801.11

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AMA Style

Yuan Xing-hua, Qiu Ming-hao, Jiang Meng-ya, He Yu-ling, Wan Shu-ting, et al. Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault. Int J Electr Compon Energy Convers. 2022;8(1):1-8. doi: 10.11648/j.ijecec.20220801.11

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@article{10.11648/j.ijecec.20220801.11,
  author = {Yuan Xing-hua and Qiu Ming-hao and Jiang Meng-ya and He Yu-ling and Wan Shu-ting and Tang Gui-Ji},
  title = {Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault},
  journal = {International Journal of Electrical Components and Energy Conversion},
  volume = {8},
  number = {1},
  pages = {1-8},
  doi = {10.11648/j.ijecec.20220801.11},
  url = {https://doi.org/10.11648/j.ijecec.20220801.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijecec.20220801.11},
  abstract = {Rotor interturn short circuit (RISC) is a common electrical fault in synchronous generators. By far, scholars have carried out a lot of researches on static rotor interturn short circuit (SRISC), while dynamic rotor interturn short circuit (DRISC) is rarely taken into account. This paper analyzes the stator current characteristics before and after DRISC fault in synchronous generators. First, the expressions of the air-gap flux density respectively in normal, SRISC, and DRISC cases, are derived. Then the two-dimensional finite element model is established to analyze the stator current under the aforementioned three conditions. Finally, experiments are carried out on the CS-5 prototype generator to test the stator currents. The experimental results are consistent with the theoretical analysis and the finite element calculation data. It is shown that the occurrence of the dynamic rotor interturn short circuit will reduce the root mean square value as well as the odd harmonics of the magnetic flux density and the stator current, while at the meantime it will increase the new generated even harmonics. Compared with the static short circuit, the current curve of the stator phase shows an obvious "peak". With the aggravation of the short circuit degree between dynamic turns, the effective value of current and the odd harmonics will be decreased. The stator current in the dynamic rotor interturn short circuit cases is generally between those of normal condition and static rotor interturn short circuit case.},
 year = {2022}
}

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TY  - JOUR
T1  - Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault
AU  - Yuan Xing-hua
AU  - Qiu Ming-hao
AU  - Jiang Meng-ya
AU  - He Yu-ling
AU  - Wan Shu-ting
AU  - Tang Gui-Ji
Y1  - 2022/07/05
PY  - 2022
N1  - https://doi.org/10.11648/j.ijecec.20220801.11
DO  - 10.11648/j.ijecec.20220801.11
T2  - International Journal of Electrical Components and Energy Conversion
JF  - International Journal of Electrical Components and Energy Conversion
JO  - International Journal of Electrical Components and Energy Conversion
SP  - 1
EP  - 8
PB  - Science Publishing Group
SN  - 2469-8059
UR  - https://doi.org/10.11648/j.ijecec.20220801.11
AB  - Rotor interturn short circuit (RISC) is a common electrical fault in synchronous generators. By far, scholars have carried out a lot of researches on static rotor interturn short circuit (SRISC), while dynamic rotor interturn short circuit (DRISC) is rarely taken into account. This paper analyzes the stator current characteristics before and after DRISC fault in synchronous generators. First, the expressions of the air-gap flux density respectively in normal, SRISC, and DRISC cases, are derived. Then the two-dimensional finite element model is established to analyze the stator current under the aforementioned three conditions. Finally, experiments are carried out on the CS-5 prototype generator to test the stator currents. The experimental results are consistent with the theoretical analysis and the finite element calculation data. It is shown that the occurrence of the dynamic rotor interturn short circuit will reduce the root mean square value as well as the odd harmonics of the magnetic flux density and the stator current, while at the meantime it will increase the new generated even harmonics. Compared with the static short circuit, the current curve of the stator phase shows an obvious "peak". With the aggravation of the short circuit degree between dynamic turns, the effective value of current and the odd harmonics will be decreased. The stator current in the dynamic rotor interturn short circuit cases is generally between those of normal condition and static rotor interturn short circuit case.
VL  - 8
IS  - 1
ER  -

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Author Information

Yuan Xing-hua

Department of Mechanical Engineering, North China Electric Power University and Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding, China
Qiu Ming-hao

Department of Mechanical Engineering, North China Electric Power University and Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding, China
Jiang Meng-ya

Department of Mechanical Engineering, North China Electric Power University and Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding, China
He Yu-ling

Department of Mechanical Engineering, North China Electric Power University and Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding, China
Wan Shu-ting

Department of Mechanical Engineering, North China Electric Power University and Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding, China
Tang Gui-Ji

Department of Mechanical Engineering, North China Electric Power University and Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding, China

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Plain Text BibTeX RIS

APA Style

Yuan Xing-hua, Qiu Ming-hao, Jiang Meng-ya, He Yu-ling, Wan Shu-ting, et al. (2022). Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault. International Journal of Electrical Components and Energy Conversion, 8(1), 1-8. https://doi.org/10.11648/j.ijecec.20220801.11

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ACS Style

Yuan Xing-hua; Qiu Ming-hao; Jiang Meng-ya; He Yu-ling; Wan Shu-ting, et al. Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault. Int. J. Electr. Compon. Energy Convers. 2022, 8(1), 1-8. doi: 10.11648/j.ijecec.20220801.11

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AMA Style

Yuan Xing-hua, Qiu Ming-hao, Jiang Meng-ya, He Yu-ling, Wan Shu-ting, et al. Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault. Int J Electr Compon Energy Convers. 2022;8(1):1-8. doi: 10.11648/j.ijecec.20220801.11

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@article{10.11648/j.ijecec.20220801.11,
  author = {Yuan Xing-hua and Qiu Ming-hao and Jiang Meng-ya and He Yu-ling and Wan Shu-ting and Tang Gui-Ji},
  title = {Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault},
  journal = {International Journal of Electrical Components and Energy Conversion},
  volume = {8},
  number = {1},
  pages = {1-8},
  doi = {10.11648/j.ijecec.20220801.11},
  url = {https://doi.org/10.11648/j.ijecec.20220801.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijecec.20220801.11},
  abstract = {Rotor interturn short circuit (RISC) is a common electrical fault in synchronous generators. By far, scholars have carried out a lot of researches on static rotor interturn short circuit (SRISC), while dynamic rotor interturn short circuit (DRISC) is rarely taken into account. This paper analyzes the stator current characteristics before and after DRISC fault in synchronous generators. First, the expressions of the air-gap flux density respectively in normal, SRISC, and DRISC cases, are derived. Then the two-dimensional finite element model is established to analyze the stator current under the aforementioned three conditions. Finally, experiments are carried out on the CS-5 prototype generator to test the stator currents. The experimental results are consistent with the theoretical analysis and the finite element calculation data. It is shown that the occurrence of the dynamic rotor interturn short circuit will reduce the root mean square value as well as the odd harmonics of the magnetic flux density and the stator current, while at the meantime it will increase the new generated even harmonics. Compared with the static short circuit, the current curve of the stator phase shows an obvious "peak". With the aggravation of the short circuit degree between dynamic turns, the effective value of current and the odd harmonics will be decreased. The stator current in the dynamic rotor interturn short circuit cases is generally between those of normal condition and static rotor interturn short circuit case.},
 year = {2022}
}

Copy | Download

TY  - JOUR
T1  - Analysis on Stator Current Characteristics in Synchronous Generators Under Dynamic Rotor Interturn Short Circuit Fault
AU  - Yuan Xing-hua
AU  - Qiu Ming-hao
AU  - Jiang Meng-ya
AU  - He Yu-ling
AU  - Wan Shu-ting
AU  - Tang Gui-Ji
Y1  - 2022/07/05
PY  - 2022
N1  - https://doi.org/10.11648/j.ijecec.20220801.11
DO  - 10.11648/j.ijecec.20220801.11
T2  - International Journal of Electrical Components and Energy Conversion
JF  - International Journal of Electrical Components and Energy Conversion
JO  - International Journal of Electrical Components and Energy Conversion
SP  - 1
EP  - 8
PB  - Science Publishing Group
SN  - 2469-8059
UR  - https://doi.org/10.11648/j.ijecec.20220801.11
AB  - Rotor interturn short circuit (RISC) is a common electrical fault in synchronous generators. By far, scholars have carried out a lot of researches on static rotor interturn short circuit (SRISC), while dynamic rotor interturn short circuit (DRISC) is rarely taken into account. This paper analyzes the stator current characteristics before and after DRISC fault in synchronous generators. First, the expressions of the air-gap flux density respectively in normal, SRISC, and DRISC cases, are derived. Then the two-dimensional finite element model is established to analyze the stator current under the aforementioned three conditions. Finally, experiments are carried out on the CS-5 prototype generator to test the stator currents. The experimental results are consistent with the theoretical analysis and the finite element calculation data. It is shown that the occurrence of the dynamic rotor interturn short circuit will reduce the root mean square value as well as the odd harmonics of the magnetic flux density and the stator current, while at the meantime it will increase the new generated even harmonics. Compared with the static short circuit, the current curve of the stator phase shows an obvious "peak". With the aggravation of the short circuit degree between dynamic turns, the effective value of current and the odd harmonics will be decreased. The stator current in the dynamic rotor interturn short circuit cases is generally between those of normal condition and static rotor interturn short circuit case.
VL  - 8
IS  - 1
ER  -

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