NDLI: Measurement and analysis of surface partial discharges at semi-square voltage waveforms

Content Provider	IEEE Xplore Digital Library
Author	Florkowska, B. Roehrich, J. Zydron, P. Florkowski, M.
Copyright Year	1994
Abstract	The fast switching in PWM drive applications exerts complex transient stresses on the cable and motors, creating conditions for different partial discharge form initiation. The mechanism of surface PD on dielectric materials (ethylene-propylene rubber and thermosetting insulation) under semi square voltage has been investigated. In the rod-plane electrode arrangement positive polarity PWM-like pulses with variable rise time (800 ns and longer), and frequency (0.1 Hz to 2 kHz) have been used. Experiments show correlation of PD inception voltage and its time range within a semi-square voltage period with slew rate of applied voltage and its switching frequency. Partial discharges appear not only at rising/falling slope of the voltage pulses but also during the voltage plateau, even when the rod electrode potential becomes zero. The main process taking place during surface PD action on insulating materials is the interaction of space charge near the rod electrode with the polarized dielectric. As a result it was revealed that in such conditions PD can occur within a whole period. This phenomenon is relevant to understand the destructive processes in insulating materials under PWM-like pulses action.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
File Size	2551603
File Format	PDF
ISSN	10709878
Volume Number	18
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Voltage measurement Electrodes Pulse width modulation Switching frequency Insulation Stress aging processes pulse width modulation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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PD properties when varying the smoothness of synthesized waveforms

Measurement of partial discharges at rapidly changing voltages

Influence of supply voltage frequency and magnitude on PD pulse parameters

Influence of rise time on partial discharge extinction voltage at semi-square voltage waveforms

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Life tests on twisted pairs in presence of partial discharges: influence of the voltage waveform

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Characteristics of PD under square wave voltages and their influence on motor insulation endurance

Partial discharge spectral response to variations in the supply voltage frequency

Measurement and analysis of surface partial discharges at semi-square voltage waveforms

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