Effects of discharge area and surface conductivity on partial discharge behavior in voids under square voltages

Wu, Kai; Okamoto, Tatsuki; Suzuoki, Yasuo

doi:10.1109/tdei.2007.344627

Cited by 68 publications

(20 citation statements)

References 18 publications

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“…Documentation [8][9][10] studied the single waveform of PD and discharging patterns in the cavity, brought forward the evolution law of rise/fall time of discharging pulse during the deterioration process, and divided the discharge process into five stages. Documentation [11][12][13][14] simulated the variation of surface conductivity, studied the changing rules of discharging waveforms and discharging patterns when the conductivity varied, and proposed the relationship between discharging area and discharging pattern. Documentation [15][16][17][18] simulated the discharging patterns and calculated the parameters of material using mathematical methods such as Monte Carlo.…”

Section: Introductionmentioning

confidence: 99%

Study on the relationship between damage of oil‐impregnated insulation paper and evolution of phase‐resolved partial discharge patterns

Liao

Yan

Yang

et al. 2010

Int Trans Elec Energy Syst

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SUMMARYThis paper studied the relationships between evolution of phase-resolved partial discharge (PRPD) patterns and damaging characteristics, such as surface topography, surface roughness, and surface conductivity, and the constitution of gas within cavity for oil-impregnated insulation paper during the damaging process caused by partial discharge (PD). According to PRPD patterns, the damaging process can be divided into five stages. At each of the stages, surface conditions of insulation were analyzed by optical microscopy, scanning electron microscopy, atomic force microscopy, and high-resistance meter. Gas constitution was analyzed by gas chromatography-mass spectrometry, as well. Meanwhile, PRPD patterns of different gas constitution were compared, and analyzed, as well as those of different surface-damaging conditions. Results reveal that during the damaging process, the percentage content of electronegative gases descends and ascends alternately, and discharging types alternate between pseudo-glow (or glow) and spark. PRPD pattern of pseudo-glow-type discharge chiefly depends on the properties of weak electronegative gases generated during PD. PRPD patterns of spark-type discharge are chiefly determined by surface damage conditions. PRPD patterns of spark-type discharge manifest different levels of ''rabbit-ear'' and periodical features. The level of ''rabbit-ear'' feature is mostly determined by surface conductivity, while the level of periodical feature generally depends on surface trap density. In addition, surface roughness does not change shapes of PRPD patterns; however, the amount of discharge increases as the value of surface roughness declines.

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Section: Introductionmentioning

confidence: 99%

Study on the relationship between damage of oil‐impregnated insulation paper and evolution of phase‐resolved partial discharge patterns

Liao

Yan

Yang

et al. 2010

Int Trans Elec Energy Syst

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show abstract

“…-q-n distribution patterns [4]. Other researchers were interested in stochastic properties of PD phenomena [5] and memory propagation effects in PD statistics [6] and more general PD model was proposed [7][8] [9].…”

Section: Introductionmentioning

confidence: 99%

An integral equation for analyzing phase-resolved partial discharge characteristics under sinusoidal voltage waveform conditions

Okamoto

Takahashi

Miyazaki

et al. 2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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The authors have been developing a simple partial discharge model to analyze phase-resolved partial discharge characteristics such as ! ! -n characteristics. The simple model is simply based on the Whitehead's three-capacitance equivalent circuit model for partial discharges. The authors proposed an integral equation based on the fluctuation of delay time of each partial discharge inception. They already succeeded to obtain the solution of the integral equation at low voltage case, in which only one partial discharge can occur at a half cycle of an applied ac voltage with a triangular waveform and also with a sinusoidal waveform. The results have been published elsewhere. This paper describes the solutions of the integral equation for higher voltage conditions in which multi partial discharges can occur at the half cycle of a sinusoidal ac waveform. These solutions give basically pulse number distribution as a function of applied voltage phase angle, that is the ! -n characteristics. Those characteristics show good agreement with those obtained by Monte-Carlo simulation and also those obtained by experiments.

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“…Assume the single discharge pulse does not have a cumulative effect on the background electric field, so every corona discharge event from the needle tip should give almost the same amount of charge q 0 . Therefore, the cumulative corona charge Q(t) during discharge activities is 0 ( ) ( ) Q t q N t (2) where N(t) is the cumulative number of corona pulses from the start. The average corona current I C is then obtained by…”

Section: Schematic Of Time-resolved Pd Measuirement Systemmentioning

confidence: 99%

“…PDs are usually measured with 50 Hz AC sinusoidal voltage stimulus in an on-line situation, but can also be measured at other voltages in off-line situations [1,2]. When a solid dielectric barrier is limiting the discharge activity, every discharge event deposits a certain amount of charges on the surface of the barrier.…”

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confidence: 99%

Lumped-circuit Modeling of Surface Charge Decay in a Needle-plane geometry

Wang¹,

Taylor²,

Niasar³

et al. 2018

NORD-IS

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<p>Partial discharge (PD) tests were carried out in a needle-plane geometry where the plane was covered by a dielectric barrier. PDs were generated by the application of a periodic negative step voltage. A typical lumped circuit model of the dielectric was created to simulate the bulk and surface conduction of space charge decay processes during corona discharges. The comparison was made between the simulation and the experimental results at the first cycle of the applied voltage. The result shows that at a lower applied voltage, the surface charges decay slower because of a lower surface and bulk conduction, however, they decay faster with the increasing applied voltage due to the increasing conduction.</p>

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Effects of discharge area and surface conductivity on partial discharge behavior in voids under square voltages

Cited by 68 publications

References 18 publications

Study on the relationship between damage of oil‐impregnated insulation paper and evolution of phase‐resolved partial discharge patterns

Study on the relationship between damage of oil‐impregnated insulation paper and evolution of phase‐resolved partial discharge patterns

An integral equation for analyzing phase-resolved partial discharge characteristics under sinusoidal voltage waveform conditions

Lumped-circuit Modeling of Surface Charge Decay in a Needle-plane geometry

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