Insulation State On-line Monitoring and Running Management of Large Generator

Qiudong  Sun; Zhengxin  Zhou; Weiqin  Guo

doi:10.4236/epe.2010.23030

Search Menu Sign in

Journals by Subject

Journals by Title

EPE Vol.2 No.3 , August 2010

Insulation State On-line Monitoring and Running Management of Large Generator

Qiudong Sun, Zhengxin Zhou, Weiqin Guo

Abstract: This study presented an insulation state monitoring method for large generator based on radio frequency (RF) technique. As an on-line condition monitor and the precondition of condition-based maintenance (CBM), the RF monitor used the high frequency current mutual inductor to detect the partial discharge signal from neutral wire of stator windings. According to the magnitude of indicative value of RF monitor, a five phase model was also proposed to manage the generator’s running better. The practices show that the proposed method is effective.

Keywords: Large Generator, Partial Discharge, Radio Frequency Technique, On-line Monitoring, Running Management

Cite this paper: nullQ. Sun, Z. Zhou and W. Guo, "Insulation State On-line Monitoring and Running Management of Large Generator," Energy and Power Engineering, Vol. 2 No. 3, 2010, pp. 203-207. doi: 10.4236/epe.2010.23030.

References

[1] W. Q. Guo, “On-line Insulation Monitoring and Condition Maintenance to Generators,” Journal of Shanghai Second Polytechnic University, No. 1, 2002, pp. 20-26.

[2] G. Paoletti and A. Golubev, “Partial Discharge Theory and Technologies Related to Traditional Testing Methods of Large Rotating Apparatus,” 34th IAS Annual Meeting, Phoenix, Vol. 2, October 1999, pp. 967-981.

[3] C. J. Huang, W. Y. Yu, P. Gabe and W. Wei, “Partial Discharge On-line Monitoring and Its Application to the Large Generators,” Large Electric Machine and Hydraulic Turbine, No. 6, 2000, pp. 33-38.

[4] X. L. Chen, X. P. Cao, Y. H. Lu, B. Yue, Y. H. Cheng, and H. K. Xie, “Field Detection of Ultra-wide Band Partial Discharge for Generator Stator Insulation,” Electric Power, Vol. 35, No. 3, 2002, pp. 31-34.

[5] G. Stone, V. Warren and M. Fenger, “Diagnostic Info- rmation Obtained from Examining a Large Stator Winding PD Result Database,” Proceedings of the International Symposium on Electrical Insulating Materials, Vol. 33, 2001, pp. 635-640.

[6] G. Stone, “Advancements during the Past Quarter Century in On-line Monitoring of Motor and Generator Winding Insulation,” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 9, No. 5, 2002, pp. 746- 751.