The stator ground protection faults occurred twice in a 600MW generator. After extraction of rotor, it was found that the connection part of the stator bar with lead wire had been blown, and two fixed bolts fitting the lead wire have completely loosened. For analysis of ground-fault reasons, the generator stator end vibration analysis system was installed for on-line vibration monitoring of both sides end winding. The test results shown that the vibration of stator end winding exceeded the standard, and the main frequency component was the rotational frequency. The over-speed test and modal analysis determine that the resonance frequency of stator end wire was close to 50Hz. By increasing the stator cooling water temperature and adding sandbags, the resonance frequency of stator end wire avoid the generator operating frequency, and the end vibration was reduced to a safe level.
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ASME 2013 Power Conference
July 29–August 1, 2013
Boston, Massachusetts, USA
Conference Sponsors:
- Power Division
ISBN:
978-0-7918-5606-2
PROCEEDINGS PAPER
Improvement of Vibration Characteristics on Stator End Winding of 600MW Generator
Shi Liu,
Shi Liu
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
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Yongxiong Guo,
Yongxiong Guo
Jinwan Power Plant, Zhuhai, Guangdong, China
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Zhi Li,
Zhi Li
Shanghai Electric Power Generation Equipment Co., Ltd., Shanghai, China
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Lei Liu,
Lei Liu
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
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Qingshui Gao,
Qingshui Gao
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
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Yongxin Feng,
Yongxin Feng
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
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Chu Zhang,
Chu Zhang
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
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Tao Yang
Tao Yang
Huazhong University of Science and Technology, Wuhan, Hubei, China
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Shi Liu
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
Yongxiong Guo
Jinwan Power Plant, Zhuhai, Guangdong, China
Zhi Li
Shanghai Electric Power Generation Equipment Co., Ltd., Shanghai, China
Lei Liu
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
Qingshui Gao
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
Yongxin Feng
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
Chu Zhang
Guangdong Power Test & Research Institute, Guangzhou, Guangdong, China
Tao Yang
Huazhong University of Science and Technology, Wuhan, Hubei, China
Paper No:
POWER2013-98139, V002T06A002; 5 pages
Published Online:
February 14, 2014
Citation
Liu, S, Guo, Y, Li, Z, Liu, L, Gao, Q, Feng, Y, Zhang, C, & Yang, T. "Improvement of Vibration Characteristics on Stator End Winding of 600MW Generator." Proceedings of the ASME 2013 Power Conference. Volume 2: Reliability, Availability and Maintainability (RAM); Plant Systems, Structures, Components and Materials Issues; Simple and Combined Cycles; Advanced Energy Systems and Renewables (Wind, Solar and Geothermal); Energy Water Nexus; Thermal Hydraulics and CFD; Nuclear Plant Design, Licensing and Construction; Performance Testing and Performance Test Codes. Boston, Massachusetts, USA. July 29–August 1, 2013. V002T06A002. ASME. https://doi.org/10.1115/POWER2013-98139
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