Effect of rise time on PD pulse features under repetitive square wave voltages

Author

Peng Wang ; Cavallini, Andrea ; Montanari, Gian ; Guangning Wu

Author_Institution

Lab. of Innovation Technol., Univ. of Bologna, Bologna, Italy

Volume

20

Issue

1

fYear

2013

fDate

Feb-13

Firstpage

245

Lastpage

254

Abstract

This paper focuses on the influence of repetitive square wave voltage rise time on partial discharge pulse characteristics in the ultra-high frequency range. Paerial Discharge (PD) tests on single-point contact crossed pairs were carried out using repetitive square wave voltages with a wide range of rise times, from 200 ns to 400 μs, including also 50 Hz sinusoidal voltage waveforms. Experimental results show that rise time has a significant influence on magnitude and frequency spectrum of PD pulses. Voltages of shorter rise times generate larger PD pulses with a predominance of high frequency components in the energy spectrum. Interpretations are presented for this phenomenon.

Keywords

induction motors; machine insulation; partial discharges; PD pulse features; energy spectrum; high frequency components; partial discharge pulse characteristics; repetitive square wave voltage; single-point contact crossed pairs; sinusoidal voltage waveforms; time 200 ns to 400 mus; ultra-high frequency range; Firing; Generators; Induction motors; Insulation; Partial discharges; Time frequency analysis; Voltage measurement; Partial discharges; UHF filters; antennas; converters; induction motors; magnet wire; motor drives; pulse widthmodulated inverters; square wave generators;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2013.6451364

Filename

6451364