Title :
The transfer characteristic of partial discharge propagation along power transformer winding based on vector fitting
Author :
Liu Yunpeng ; Lu Fangcheng ; Chengrong, Li
Author_Institution :
Dept. of Electr. Eng., North China Electr. Power Univ., Baoding, China
Abstract :
Partial discharge pulse is the basic information for power transformer insulation fault diagnosis, but it will be distorted during the propagating course in the transformer winding. In this paper, the transfer characteristic of partial discharge pulse propagation along its winding is investigated based on vector fitting. The frequency response curve of the winding has been tested. Vector Fitting using rational function consisting of real poles as well as complex conjugate poles and zeros to fitting the frequency response based on tested data. Then the transfer function of the winding is obtained by this way. It can remove the aberration, which caused by the partial discharge pulse propagation in transformer winding. The method is simple and effective. Its efficiency is verified by typical partial discharge measuring.
Keywords :
curve fitting; fault diagnosis; frequency response; partial discharge measurement; poles and zeros; power transformer insulation; transfer functions; transformer windings; complex conjugate poles; complex conjugate zeros; fault diagnosis; frequency response curve; partial discharge measurement; partial discharge pulse propagation; power transformer insulation; power transformer winding; transfer function; vector fitting; Fault diagnosis; Frequency response; Partial discharges; Poles and zeros; Power transformer insulation; Power transformers; Pulse transformers; Testing; Transfer functions; Windings;
Conference_Titel :
Electric Utility Deregulation, Restructuring and Power Technologies, 2004. (DRPT 2004). Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8237-4
DOI :
10.1109/DRPT.2004.1338069
