NDLI: The effects of square wave voltage rise time on PD statistics in time and frequency domain

Content Provider	IEEE Xplore Digital Library
Author	Peng Wang Cavallini, A. Montanari, G.C.
Copyright Year	2015
Description	Author affiliation: LIT/DIE, Univ. of Bologna, Bologna, Italy (Cavallini, A.; Montanari, G.C.) \|\| Sch. of Electr. Eng. & Inf., Sichuan Univ., Chengdu, China (Peng Wang)
Abstract	IEC standard for the design and qualification of the insulation system of inverter-fed motors controlled by power electronics refers to the measurement of partial discharge inception voltage (PDIV) or repetitive partial discharge inception voltage (RPDIV). This is, however, not a simple testing procedure when carried out under repetitive impulse voltage. Indeed, impulse voltages cause strong switch-on/off disturbance, which make much more difficult to distinguish PD signals from noise. To overcome this problem, the effects of impulse rise time on PD pulse signals should be investigated in order to design appropriate PD sensors with high signal-to-noise ratio and to choose suitable digital signal processing methods after the high-speed analog to digital conversion. This work investigates the influence of repetitive impulsive rise time on PD statistics focusing on experiments performed on crossed enameled wires under square wave impulsive voltages with different rise times, from 50 ns (the minimum) to sinusoidal. The dependence of PD magnitudes and voltages (firing voltages), as well as PD pulse energy distribution maps (in the time/frequency domain), on square wave voltage rise time, are analyzed. It is shown that the rise times of the square wave voltage can have significant influence on PD statistics both in time and frequency domains; impulse voltages with shorter rise time are likely to induce PD events with relatively higher energy in 1.0 to 1.5 GHz domain, which will be beneficial for increasing signal-to-noise ratio when using ultra-high frequency antenna; PD repetition rate decreases with rise times.
Starting Page	262
Ending Page	265
File Size	1272000
Page Count	4
File Format	PDF
ISBN	9781479973521
e-ISBN	9781479973545
DOI	10.1109/ICACACT.2014.7223552
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Time-frequency analysis Insulation Reliability Pulse width modulation antenna rotating machines partial discharge ultra-high frequency
Content Type	Text
Resource Type	Article

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