The study of partial discharge inception voltage of mineral oil using needle - Plane electrode configuration

Pattanadech, Norasage; Pratomosiwi, F.; Wieser, B.; Baur, M.; Muhr, M.

doi:10.1109/ichve.2012.6357020

Cited by 17 publications

(3 citation statements)

References 4 publications

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“…Meanwhile, for rounded-cornered electrode, lower PDIV value might be attributed to the electric field enhancement at the oil small gap which also the location of the highest electric field. This phenomenon couldpossibly explain that PD in oil/pressboard interface begin in oil as PDIV depends directly on the maximum field [23].…”

Section: Electric Field Simulationmentioning

confidence: 91%

Considerations for Dielectric Properties Measurements of Oil Immersed Pressboard

Pratomosiwi¹,

Pattanadech²,

Wieser³

et al. 2012

ijeei

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Dielectric properties including relative permittivity, dielectric dissipation factor (DDF) and dc resistivity has been used widely as a design parameter of insulation system. In measuring dielectric properties of oil immersed material (OIM), we have to make some adaptations from IEC 60093 and IEC 60250.This paper is focused on dielectric properties measurement of oil immersed pressboard (OIP) i.e. related to the effect of live electrode corner shape, the effect of electrode's weight, and the applied the electric field stress and temperature.In this experiment, the solid and liquid dielectric wereoil immersed transformer board type B 3.1A and operated under mineral oil bath, Nynas Nytro 4000x. We concluded that, round-cornered electrode yields steep electric field enhancement at the oil side. This phenomena makes it easier to generate oil discharge in the wedgewhen compared to sharp-cornered electrode. For measuring dielectric properties at high voltage level, this phenomenon should take into account. It was also found that electrode with pressure higher than 1.9 N/cm2 gives enough pressure to prevent a thin oil layer that present on surface.We also notice that for small g h ⁄ ratio (the gap of guard and guarded electrode is small compared to the sample) or thick sample, the fringing effect is high. Therefore calculation of effective area according to IEC 60093 is considerably applicable for thick sample. These results could be used as a consideration when measuring dielectric properties of oil immersed pressboardin compliment with IEC 60093 and IEC 60250.

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Section: Electric Field Simulationmentioning

confidence: 91%

Considerations for Dielectric Properties Measurements of Oil Immersed Pressboard

Pratomosiwi¹,

Pattanadech²,

Wieser³

et al. 2012

ijeei

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“…To investigate the discharge behavior PDIV, PDEV and apparent value of PD in Pico coulombs are very important. PDIV and PDEV were measured according to IEC 60270 and 61294 standards [33,34]. PDIV value depends upon the rate of rise of voltage and PDEV depends upon both the time and decay rate of voltage.…”

Section: Pd Inception and Extinction Voltagesmentioning

confidence: 99%

Effect of nano filler concentration on leakage current and partial discharge properties of zepoxy nano composites

et al. 2019

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Electrical insulation materials play a key role in stable and uninterrupted operation of electrical power system. Researchers working in the field of electrical insulation have turned their focus to nano composite insulation materials for better performance and reliability. A typical nano composite insulation material is a combination of nano particles and base materials. Since last 25 years silicon rubber and epoxy are two widely used electrical insulation materials for outdoor and indoor applications respectively. To further enhance the electrical insulation performance of these materials addition of nano particles has proven to be of practical value. This study presents an investigation on zepoxy (a military grade epoxy) incorporated with three different nano particles at varying percentages. The main aim was to find the nature of relationship between leakage current (LC) and partial discharge (PD). In addition to that optimum composition which results in lowest values of PD and LC was also investigated for each of three nano composites. The results of this study help to understand the interdependence between LC and PD for indoor electrical insulation based on zepoxy. LC and PD play a vital role in condition assessment of any insulation material.

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“…In many case, Partial Discharge Inception Voltage is an alternatively important indicator that most researchers use for representing the integrity of the liquid insulation [5].The definition of Partial Discharge Inception Voltage of an insulating liquid according to the IEC 61294 is the lowest voltage at which an apparent charge occurs equal or exceeding 100 pC when the sample is tested under the specified conditions [6]. Some researchers report that the characteristic features of partial discharge phenomena greatly depend on experimental conditions such as electrode geometry, shape and amplitude of applied voltage, liquid nature and purity [7].…”

Section: Introductionmentioning

confidence: 99%

The Implementation of Needle-Plane Electrode Configuration and Test Methods for Partial Discharge Inception Voltage Characteristic Measurement of Mineral Oil

Sipahutar¹,

Suwarno²,

Kemma³

et al. 2013

ijeei

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Abstract:The investigation of the Partial Discharge Inception Voltage characteristic is performed by many researchers using the needle-plane electrode configuration and various test methods. This was conducted due to the capability of Partial Discharge Inception Voltage characteristic to represent or determine the condition of insulating liquid. This paper discusses the implementation of the needle-plane electrode configuration and two test methods to find out the characteristics of Partial Discharge in Partial Discharge Inception Voltage level of mineral oil. For this purposes, the mineral oil which used was Nynas Nitro 4000x with water content less than 10 ppm. In experiment, the test circuit was set up according to IEC 60270. The Ramp Method as the first test procedure was conducted in this experiment according to IEC 61294 with ramp rate of rise test voltage 1 kV/s until Partial Discharge Inception Voltage occurred. Meanwhile, a Combine Method as the second test procedure was used as comparative Partial Discharge Inception Voltage test technique. With this combine method, the test voltage was applied to the test object with rate of rise test voltage 1 kV/s until 70% of the Partial Discharge Inception Voltage value obtained from the ramp method. Then the test voltage was increased in steps with 1 kV/step with step duration of 1 minute until Partial Discharge Inception Voltage obtained with apparent charge ≥ 100 pC. The rest time between consecutive tests was 5 minutes. The needle tip radius that used as high voltage electrode were 10 µm and 20 µm, meanwhile brass plane electrode with diameter 75mm and 50mm was used as the grounded electrode. The gap distance between the needle electrodes toward ground electrode was fixed at 50 mm. The calculation of electric field stress of the needle-plane electrode configuration was done by using simulation of Finite Element Method (FEM). Based on the Partial Discharge Inception Voltage test result, the needle electrodes with tip radius 10 µm will produce electric field stress that higher than other needle tip, meanwhile the Partial Discharge Inception Voltage is lower which tested using both test method. By using the combine method, the Partial Discharge Inception Voltage value, charge quantity and the number of Partial Discharge will be lower than the ramp method. The results also showed that the Partial Discharge pulse currents using both test method was about 0.2 -0.85 mA. The time duration of Partial Discharge pulse was in the range of 1.01 -8.38 µs and the rise time were between 68 -301 ns. It was found that the Partial Discharge Inception Voltage test result agree with the Weibull distribution

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The study of partial discharge inception voltage of mineral oil using needle - Plane electrode configuration

Cited by 17 publications

References 4 publications

Considerations for Dielectric Properties Measurements of Oil Immersed Pressboard

Considerations for Dielectric Properties Measurements of Oil Immersed Pressboard

Effect of nano filler concentration on leakage current and partial discharge properties of zepoxy nano composites

The Implementation of Needle-Plane Electrode Configuration and Test Methods for Partial Discharge Inception Voltage Characteristic Measurement of Mineral Oil

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