[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.4313/TEEM.2006.7.5.252

Study of PD Location in Generators by PD Pulses Propagation

Cheng, Yang-Chun (North China Electric Power University)
Li, Cheng-Rong (Beijing Key laboratory of High Voltage & EMC)
Wang, Wei (Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control (North China Electric Power University))

Publication Information

Transactions on Electrical and Electronic Materials / v.7, no.5, 2006 , pp. 252-256 More about this Journal

Abstract

When a partial discharge takes place at the stator of a generator, the electrical pulse will propagate along the stator bars and the capacitor chains formed by the end part of the stator winds. On the first path, the pulse propagates as a travel wave at slow speed. On the second path, the pulse propagates at quick speed. Based on the data of the experiments on a real 50 MW steam generator, the author has found the pulses can propagate by magnetic field of the stator winding. It was studied that how to locating the partial discharge by signals coming from the different paths, including the features of signals on the two paths at time domain and frequency domain, the measurement frequency rang of the signals, the blind area, the advantage and disadvantage of this method.

Keywords

Generator; Insulation; Location; Partial discharge; Propagation; Travel wave;

Citations & Related Records

Reference

1	Q. Su, 'A new partial discharge detector for on-line insulation condition monitoring of generators', Proceeding of 10th International Symposium on High Voltage Engineering, p. 291, Canada, 1997
2	D. Hui, 'Propagation rule of partial discharge narrow pulse in the stator windings of steam generators', Doctor dissertation, Tsinghua university, 1999
3	J. W. L, Simpson, R. C. Tychsen, and Q. SU, 'Evaluation of partial discharge detection techniques on hydro-generators in the Australian snowy mountains scheme TUMUT 1 case study', IEEE Trans. on Energy Conversion, Vol. 10, No.1, p. 18, 1995 DOI ScienceOn
4	G. C. Stone, 'Partial discharge-part VII: partial techniques for measuring PD in operating equipment', IEEE Electrical Insulation Magazine, Vol. 7, No.4, p. 9, 1991
5	M. Henriksen, G. C. Stone, and M. Kurtz, 'Propagation of partial discharge and noise pulses in turbine generators', IEEE Trans on Energy Conversion, Vol. 1, No.3, p. 161, 1986