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Partial discharge

About: Partial discharge is a research topic. Over the lifetime, 13997 publications have been published within this topic receiving 102058 citations. The topic is also known as: PD.


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Patent
22 Dec 1998
TL;DR: In this paper, the authors proposed a partial discharge detector with a sensor for detecting partial discharge to generate a current signal, a matching resistor for the sensor for converting the current signal into a voltage signal, first and second input resistors connected to a power supply for determining a reset input terminal voltage together with the sensor, a dummy pulse generator for generating dummy pulses at fixed time intervals when the terminal voltage is a normal voltage lower than a prescribed voltage and interrupting the generation of the pulse voltage when the voltage is an abnormal voltage higher than the prescribed voltage, an amplifier for amplifying
Abstract: PROBLEM TO BE SOLVED: To reduce a cost for a partial discharge detector by actualizing detection on whether a failure exists or not by adding thereto a small amount of hardware. SOLUTION: This partial discharge detector is equipped with a sensor for detecting partial discharge to generate a current signal, a matching resistor for the sensor for converting the current signal into a voltage signal, first and second input resistors connected to a power supply for determining a reset input terminal voltage together with the matching resistor for the sensor, a dummy pulse generator for generating dummy pulses at fixed time intervals when the terminal voltage is a normal voltage lower than a prescribed voltage and interrupting the generation of the pulse voltage when the terminal voltage is an abnormal voltage higher than the prescribed voltage, an amplifier for amplifying a voltage signal owing to the dummy pulses from the pulse generator or owing to partial discharge, and a partial discharge determination/self-diagnosis circuit for performing determination on whether partial discharge has occurred or self-diagnosis by using a signal from the amplifier. COPYRIGHT: (C)2004,JPO

29 citations

Journal ArticleDOI
TL;DR: In this paper, a two-dimensional axial-symmetric model of a cylindrical void in polyethylene layers has been developed using finite element analysis software, which was used to simulate PD activity in the void under square waveform applied voltage under different amplitudes of the voltage.
Abstract: There are many factors, which influence the behaviours of partial discharge (PD) within a void located in a solid dielectric material. One of the important factors is the waveform of the applied voltage on the electrode of a system, such as its amplitude and frequency. In this study, a two-dimensional axial-symmetric model of a cylindrical void in polyethylene layers has been developed using finite element analysis software. The model was used to simulate PD activity in the void under square waveform applied voltage under different amplitudes of the voltage. The model has considered the effect of charge propagation along the void surface during a PD occurrence. The obtained simulation results were compared with the measurement results reported from previous literature to validate the PD model that has been developed in this work. It was found that the simulation and measurement results are within reasonable agreement with only slight disagreement. From the comparison, critical parameters from the model that affect PD behaviours under square waveform applied voltage were found to be the electron generation rate and the inception, extinction and critical charge propagation fields. These findings may increase an understanding of PD behaviours within a void in a dielectric material under square waveform applied voltage, which is important for insulation diagnosis.

28 citations

Journal ArticleDOI
TL;DR: In this paper, a self-pulsing discharge in flowing argon is investigated by means of electrical, optical and spectroscopic methods, and the dependence of the discharge self pulsing frequency on external parameters (applied negative dc voltage, gap dimensions) is determined, and high-resolution spectroscopy measurements at several wavelengths reveal the complex dynamics of the transient spark discharge: a pre-phase at the needle tip and capillary edge, propagation of positive and negative streamers, creation of a transient glow discharge structure and a longlasting afterglow.
Abstract: A self-pulsing discharge in flowing argon is investigated by means of electrical, optical and spectroscopic methods. The dependence of the discharge self-pulsing frequency on external parameters (applied negative dc voltage, gap dimensions) is determined, and optical and spectroscopic methods are used to investigate the discharge development with high spatial and temporal resolution. High-resolution spectroscopic measurements at several wavelengths reveal the complex dynamics of the transient spark discharge: a pre-phase at the needle tip and capillary edge, propagation of positive and negative streamers, creation of a transient glow discharge structure and a long-lasting afterglow. Excited plasma species necessary for the treatment of an exposed sample continue to be present even 80 µs after the breakdown of the active plasma.

28 citations

Journal ArticleDOI
TL;DR: In this article, the effects of high voltage direct current (HVDC) superimposed voltage harmonics on partial discharge (PD) behavior were investigated in a single air filled void embedded in a slab of polymeric insulation.
Abstract: This paper presents an investigation of effects of high voltage direct current (HVDC) superimposed voltage harmonics on partial discharge (PD) behavior. Firstly, a single air filled void embedded in a slab of polymeric insulation was modeled using finite element methods (FEM). PD phenomena activated under the influence of rippled DC voltages were simulated using an interlinked environment of MATLAB and multiphysics simulation package COMSOL. Secondly, the results of the modeling were backed up by experimental tests, where HVDC superimposed harmonics were applied to artificial void samples in the lab and trends in the resultant PD characterized with varying harmonic orders and amplitudes. The results of both modeling and experiment are generally in agreement showing that as the harmonic orders and levels increase, the repetition rate of PD pulses rises in comparison to a purely DC applied voltage having the same peak amplitude. The findings of this study will assist in understanding of PD behavior under HVDC conditions where harmonic rippling occurs on the voltage waveform.

28 citations

Journal ArticleDOI
TL;DR: In this article, the succession of partial discharges at DC voltage is discussed, and the Townsend-like discharge mechanism is found to be dominant in the case of a simple RC circuit and several discharge parameters, such as the average time lag or voltage drop of a discharge, can be evaluated.
Abstract: In this paper the succession of partial discharges at DC voltage is discussed. For the measurements presented here, the Townsend-like discharge mechanism was found to be dominant. Using a simple RC circuit, the discharge behaviour can be described. Several discharge parameters, such as the average time lag or the voltage drop of a discharge, can be evaluated. The discharge magnitude can also be predicted.

28 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023306
2022780
2021376
2020677
2019835
2018860