Suitability of Palm Based Oil as Dielectric Insulating Fluid in Transformers

Azis, Norhafiz; Jasni, Jasronita; Kadir, Mohd Zainal Abidin Ab; Mohtar, Mohd Nazim

doi:10.5370/jeet.2014.9.2.662

Cited by 60 publications

(27 citation statements)

References 29 publications

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“…On the other hand, CO can be extracted from the kernel of a matured coconut from a coconut palm. Previous studies on RBDPO and CO covered on different aspects including AC / lightning breakdown voltages, partial discharge, dielectric, physical and chemical properties [2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation on the Lightning Breakdown Voltages of Palm Oil and Coconut Oil under Non-Uniform Field at Small Gap Distances

Thien¹,

Azis²,

Jasni³

et al. 2016

Journal of Electrical Engineering and Technology

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-In recent years, there are a number of studies that have been carried out to explore the alternative for Mineral Oil (MO) as dielectric insulating fluid in transformers due to the increasing tight regulation on safety and environment. Vegetable oils have been identified as suitable candidate since it is biodegradable, non-toxic and high flash/fire points which ensure more in-service safety. Among the types of vegetable oils considered for transformers application are Palm Oil (PO) and Coconut Oil (CO). This paper presents an experimental study on the lightning breakdown voltages of PO and CO under non-uniform electric field based on needle-sphere electrodes configuration at 3 small gap distances. The type of PO used in this study is Refined Bleached and Deodorized Palm Oil (RBDPO) Olein. The main focus of this study is to examine the lightning breakdown performance of RBDPO and CO under different test conditions and assess its suitability as dielectric insulating fluid in transformers. The effect of voltage polarities (positive and negative) and testing methods (risingvoltage, up-and-down and multiple-voltage) were investigated. The data obtained from all tests were analysed by Weibull distribution in order to determine the withstand voltages for each type of oils. It was found that the breakdown voltages of RBDPO and CO are comparable with MO under positive lightning impulse. Under negative lightning impulse, the breakdown voltage of MO is slightly higher than RBDPO and CO. There is no significant effect of testing methods and voltage polarities on lightning breakdown voltages of RBDPO and CO. Based on the statistical analysis, it is found that the breakdown voltages of RBDPO and CO at 1% probability are slightly lower than MO.

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Section: Introductionmentioning

confidence: 99%

Evaluation on the Lightning Breakdown Voltages of Palm Oil and Coconut Oil under Non-Uniform Field at Small Gap Distances

Thien¹,

Azis²,

Jasni³

et al. 2016

Journal of Electrical Engineering and Technology

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“…Generally, there are 3 types of fluids that can be obtained from a palm nut which are Crude Palm Oil (CPO), Palm Kernel Oil (PKO) and Refined, Bleached, Deodorized Palm Oil (RBDPO) [12]. The most common PO considered for application in transformers is RBDPO [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…For example, as the percentage of unsaturated fatty acids contents increase, the melting and pour points will decrease [6]. There were different types of vegetable oils that had been examined for application in transformers [1,[7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Dielectric, Physical and Chemical Properties of Palm Oil and Coconut Oil under Open Thermal Ageing Condition

Mohamad¹,

Azis²,

Jasni³

et al. 2016

Journal of Electrical Engineering and Technology

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-In this paper, a study is carried out to investigate the dielectric, physical and chemical properties of Palm Oil (PO) and Coconut Oil (CO) under open thermal ageing condition. The type of PO used in this study is Refined Bleached and Deodorized Palm Oil (RBDPO) Olein. The ageing experiment was carried out at 85 °C and 115 °C for 1, 3, 5, 7 and 14 days. Several parameters were measured such as AC breakdown voltage, dielectric dissipation factor, relative permittivity, resistivity, viscosity, moisture and acidity throughout the ageing duration. Based on the study, it is found that there are no significant changes on the AC breakdown voltages and relative permittivities for both RBDPO and CO. At ageing temperature of 115°C, there are clear reduction trends of dielectric dissipation factor for CO and resistivities for most of RBDPO. On the other hand, no clear trends are observed for viscosities, moisture and acidities of RBDPO and CO throughout the ageing duration.

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“…Moreover, vegetable oil such as natural ester could also slow down the ageing rate of cellulose insulation through water scavenging and hydrolytic protection mechanism [2][3].…”

Section: Introductionmentioning

confidence: 99%

Lightning impulse investigation on vegetables oils and simulation of electric field distribution

Amin

Ishak

Katim

et al. 2018

J. Fundam and Appl Sci.

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Suitability of Palm Based Oil as Dielectric Insulating Fluid in Transformers

Cited by 60 publications

References 29 publications

Evaluation on the Lightning Breakdown Voltages of Palm Oil and Coconut Oil under Non-Uniform Field at Small Gap Distances

Evaluation on the Lightning Breakdown Voltages of Palm Oil and Coconut Oil under Non-Uniform Field at Small Gap Distances

Investigation on the Dielectric, Physical and Chemical Properties of Palm Oil and Coconut Oil under Open Thermal Ageing Condition

Lightning impulse investigation on vegetables oils and simulation of electric field distribution

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