Analysis on the Ultrasonic Propagate for Partial Discharge in the Generator Stator Winding

Abstract:

When do research on the location of partial discharge in power generator’s stator using ultrasonic sensor, there are many problems exist including that ultrasonic signals detection is not obvious or even ultrasonic sensor can not detect ultrasonic signals. This article researches the location distribution in power generator which is favorable for ultrasonic sensor to receive ultrasonic signals. Put forward a placement method of sensor which is applies to the partial discharge location of power generator basing on sonic pressure distribution of ultrasonic signal in the stator’s outer, which is obtained by simulating sound field of power generator stator using ANSYS Multiphysics. The placement method of sensor has laid the foundation for the future research of the partial discharge location of power generator. Through comparing the simulation results and actual experimental test, the authors find that simulation of sonic pressure is similar to experimental results, proving the placement method is validity.

• Periodical: Key Engineering Materials (Volumes 474-476)
• Pages: 1368-1372
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.474-476.1368
• Online since: April 2011
• Authors: Yong Ming Yang, Fan Jiang, Zu Long Zhang, Kun Ming Lin
• Keywords: Generator, Partial Discharge (PD), Sensor, Stator Winding, Ultrasonic

References

[1] HUDON C BEL EC M. Study of slot partial discharges in air-cooled generators. IEEE Transactions on Dielectrics and Electrical Insulation, 2008, 15 (6): 1675-1690.

DOI: 10.1109/tdei.2008.4712672

[2] ZHI D J, XIAN G P, L I M W. Evaluation of the degradation of generator stator ground wall insulation under multi stresses aging. IEEE Transactions on Energy Conversion, 2008, 23(2): 474-483.

DOI: 10.1109/tec.2008.918653

[3] Hemin Yang, Chaohui Li, Hong Wang. Integrated diagnosis and analyzing system for stator insulation of large-size hydro-generators based on partial discharge. Automation of electric power systems, 2004, 28(15): 61-65.

[4] Naiqiu Shu, Fang Hu, Can Zhou. Application of ultrasonic transducer technology in fault diagnosis of electric equipment. Journal of Transducer Technology, 2003, 22(5): 1-4.

[5] Ruo Feng, Jinzhong Yao, Lixun Guan. Applied acoustics. NAN JING: Nanjing University Publishing, 1999: 25-40.

[6] Changzhang Wang, Fuqi Li, Shengyou Gao. Electrical equipment on-line monitoring and fault diagnosis. BEI JING: Tsinghua University Publishing, 2005: 215-215.

[7] Quandi Wang, Chenghe Yang, Yongming Yang. Analysis on the ultrasonic online location for partial discharge in the stator winding of generator. Journal of Chongqing University, 2009, 32(10): 1151-1152. * Project supported by the Fundamental Research Funds for the Central Universities (Project No. CDJXS11150016) and the State Key Laboratory Founds of Independent Research (Project No. 2007DA10512709206).