scholarly journals Lightning Breakdown Voltage Evaluation of Palm Oil and Coconut Oil as Transformer Oil under Quasi-Uniform Field Conditions

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2676 ◽  
Author(s):  
Nurul Katim ◽  
Mohd Ishak ◽  
Nur Mohamad Amin ◽  
Mardhiah Abdul Hamid ◽  
Khairol Amali Ahmad ◽  
...  
Keyword(s):  
Normal Distribution ◽  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil ◽  
Cumulative Probability ◽  
Uniform Field ◽  
Multiple Level ◽  
Testing Methods ◽  
Distribution Fitting ◽  
Level Method

This paper presents lightning (1.2/50 µs) breakdown voltages of palm oil (PO), coconut oil (CO) and mineral oil (MO) in a quasi-uniform sphere to sphere electric field at two gap distances. The type of PO used in this study is Refined Bleached Deodorized Palm Oil (RBDPO) Olein type. The effect of voltage polarities (positive and negative) and testing methods (rising voltage, up and down and multiple level) on the lightning breakdown performance were investigated. The results indicated that lightning breakdown voltages of CO and RBDPO are comparable to those of MO under various test conditions. The results indicated that there is no polarity effect for lightning impulse breakdown tests in a quasi-uniform field. The testing methods, including rising voltage method, up and down method and multiple level method have a notable influence on the breakdown voltages. The effect of the 50% breakdown voltage on rising voltage method, up and down method and multiple level method for RBDPO and CO is comparable to MO. The withstand voltage at 1% and 50% breakdown probabilities were obtained using the Normal distribution fitting on the cumulative probability plot of impulse shots. Based on a normal distribution fitting, withstand voltages 1% breakdown probability of POA were close to the MO. Finally, based on statistical studies and simulation using ANSYS software, the prediction formulas for breakdown voltage for larger gap distances for all samples were derived.

scholarly journals Behavior of Biodegradable Oil under Impulse Voltages

2015 ◽  
Vol 785 ◽  
pp. 320-324 ◽  
Author(s):  
Nurul Izzatul Akma Katim ◽  
Mohd Taufiq Ishak ◽  
A.M. Ishak ◽  
M.Z.A.A. Kadir
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil ◽  
Mineral Oil ◽  
Electrical Performance ◽  
Uniform Field ◽  
Testing Methods ◽  
Environmental Compatibility ◽  
Impulse Voltage ◽  
Lightning Impulse

The properties of Palm Oil (PO) and Coconut Oil (CO) offer the potential for transformers with non-toxicity, high fire and flash points and better environmental compatibility while compared with those filled with Mineral Oil (MO). This potential has led to intensive studies of electrical performance of biodegradable oil especially in evaluating the electrical performance under lightning impulse voltage in recent years. This paper presents the investigation on the impulse breakdown voltage of PO and CO in such a uniform field. The PO used in this study is Refined, Bleached and Deodorized Palm Oil (RBDPO) Olein type. Two testing methods, rising-voltage and up-and-down are considered for both oils with different gap distances (2.0 mm and 3.8 mm). Testing methods including rising-voltage method and up-and-down method have no notable influence on the breakdown voltages of RBDPOs and CO compared to MO.

scholarly journals A Study on the Lightning Impulse Breakdown Voltages of Palm Oil and Coconut Oil by Different Methods

2015 ◽  
Vol 793 ◽  
pp. 9-13 ◽  
Author(s):  
Y.V. Thien ◽  
N. Azis ◽  
J. Jasni ◽  
Mohd Zainal Abidin Ab Kadir ◽  
Robiah Yunus ◽  
...  
Keyword(s):  
Electric Field ◽  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil ◽  
Uniform Electric Field ◽  
Testing Methods ◽  
Different Types ◽  
Lightning Impulse ◽  
Potential Alternative ◽  
Voltage Performance

In recent years, there have been a number of interests on the Palm Oil (PO) and Coconut Oil (CO) as a potential alternative dielectric insulating fluid in transformers which stimulate different types of studies on these oils properties. Among the important studies is the lightning impulse properties. This paper presents the investigation on the lightning impulse breakdown voltage of PO and CO under non-uniform electric field. The PO used in this study is Refined, Bleached and Deodorized Palm Oil (RBDPO) Olein type. The influence of the testing methods, rising-voltage and up-and-down are investigated at 2 gap distances for both oils. It was found that the lightning breakdown voltage performance for some of the RBDPO and CO are comparable to MO.

scholarly journals Lightning Impulse Breakdown Voltage of Rice Bran Oil for Transformer Application

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5084
Author(s):  
Mardhiah Hayati Abdul Hamid ◽  
Mohd Taufiq Ishak ◽  
Nur Sabrina Suhaimi ◽  
Jaafar Adnan ◽  
Nazrul Fariq Makmor ◽  
...  
Keyword(s):  
Weibull Distribution ◽  
Electric Fields ◽  
Breakdown Voltage ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Transformer Oil ◽  
Uniform Field ◽  
Testing Methods ◽  
Lightning Impulse ◽  
The Difference

Transformer oil does not only serve as an insulating liquid, but also in removing heat from the windings and cores. Mineral oil (MO) has been widely used in transformers for more than 150 years. Recently, researchers have attempted to search for alternative insulating oils due to the possibility that MO will run out in the future together with the concern on fire safety and environmental pollution. Among the potential oils is rice bran oil (RBO). This work presents the studies of the lightning impulse (LI) of RBO behavior under various electric fields, gap distances and testing methods. The electrical performances of LI tests show that RBO and Palm Oil (PO) have lower LI breakdown voltage than MO under both uniform and non-uniform electric fields. However, the difference in LI breakdown voltages between RBO, PO and MO are slightly small which is less than 20%. In addition, there is no significant effect in the various testing methods under both uniform field and non-uniform field where the percentages of difference are less than 12% and 8% respectively. The data of LI breakdown voltage were statistically analysed to predict the withstand voltage and 50% breakdown voltage of oil samples by using Weibull distribution. The Weibull distribution of MO, PO and RBO has well fit with the fitting line. Finally, the relationship between LI voltages under a non-uniform field with various parameters of PO and RBO was obtained and proposed. From this work, it can be concluded that RBO shows promising results to be considered as an alternative to MO in transformer applications.

scholarly journals Study of Breakdown Voltage of Vegetables oil with SiO2 Nanoparticle Additive

2018 ◽  
Vol 12 (1) ◽  
pp. 296
Author(s):  
Muhammad Bin Yahya ◽  
Fatin Amirah Binti Amirrazli
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil ◽  
Mineral Oil ◽  
Partial Discharges ◽  
Transformer Oil ◽  
Different Temperatures ◽  
The Mean ◽  
Insulating Liquid ◽  
Positive Results

<p>This paper investigates the suitability of vegetable oils to replace mineral oil based on its AC breakdown voltage, partial discharge and viscosity. The purpose of the study is to analyze the effect of the nanofluids containing SiO<sub>2</sub> nanoparticle in vegetables oils; namely, Coconut oil and Palm oil. A nanofluid is a fluid containing nanoparticles. However, the precise effects on the electrical properties is still uncertain. For decades, transformers use petroleum-based mineral oil because of its good dielectric properties and cooling capability. Coconut oil (CO) and Palm oil (PO) are thought to be   suitable alternatives to replace mineral oil as transformer oil as they are sustainable and available in plenty as natural resources.  It was obtained in this study that the breakdown voltages of these raw oils have fulfilled the standard specifications of good insulating liquid. However, the addition of SiO<sub>2</sub> did not improve the AC breakdown voltage and viscosity of coconut oil and palm oil at different temperatures. However, the addition of SiO<sub>2</sub> gave positive results in the values of partial discharges in which the presence of the nanoparticles has greatly reduced the mean volume of partial discharges for both coconut oil and palm oil.</p>

scholarly journals The effect of polarity on the lightning breakdown voltages of palm oil and coconut oil under a non-uniform field for transformers application

2016 ◽  
Vol 89 ◽  
pp. 250-256 ◽  
Author(s):  
Y.V. Thien ◽  
N. Azis ◽  
J. Jasni ◽  
M.Z.A. Ab Kadir ◽  
R. Yunus ◽  
...  
Keyword(s):  
Palm Oil ◽  
Coconut Oil ◽  
Uniform Field ◽  
Effect Of Polarity

scholarly journals Effect of surfactants on the lightning breakdown voltage of palm oil and coconut oil based Al2O3 nanofluids

2020 ◽  
Vol 31 (42) ◽  
pp. 425708
Author(s):  
Nur Aqilah Mohamad ◽  
Norhafiz Azis ◽  
Jasronita Jasni ◽  
Mohd Zainal Abidin Ab. Kadir ◽  
Robiah Yunus ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil

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

2016 ◽  
Vol 11 (1) ◽  
pp. 184-191 ◽  
Author(s):  
Yee Von Thien ◽  
Norhafiz Azis ◽  
Jasronita Jasni ◽  
Mohd Zainal Abidin Ab Kadir ◽  
Robiah Yunus ◽  
...  
Keyword(s):  
Palm Oil ◽  
Coconut Oil ◽  
Uniform Field

Effect of Particles on the AC Breakdown Voltage of Palm Oil and Coconut Oil

2015 ◽  
Vol 793 ◽  
pp. 70-74 ◽  
Author(s):  
S.S. Sinan ◽  
J. Jasni ◽  
N. Azis ◽  
Mohd Zainal Abidin Ab Kadir ◽  
M.N. Mohtar
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Breakdown Strength ◽  
Coconut Oil ◽  
Strength Properties ◽  
Copper Particles ◽  
Biodegradable Oils ◽  
Different Types ◽  
Current Scenario ◽  
Safety And Environment

Under current scenario of regulation on the safety and environment, biodegradable oils are gaining interest as dielectric insulating fluid in transformers. There are different types of biodegradable oils that are currently examined and among them are Palm Oil (PO) and Coconut Oil (CO). It is important to carry out extensive examination on these oils at laboratory level since the failure in-service could be costly. Among the important studies are the AC breakdown strength properties under the influence of particles. In this paper, a study is carried out to examine the influence of particles on the AC breakdown voltage of POand CO. The PO used in this study is Refined Bleached and Deodorized (RBDPO) Olein type. Two types of particles are used for the investigations which are cellulose and copper particles.Four different weights of particles are added on each of the samples and tested with the AC breakdown tester at a gap distance of 1 mm using VDE electrodes. It was found that copper particles have more significant effect on the AC breakdown strength of RBDPO and CO than cellulose particles.

scholarly journals Breakdown Characteristic of Palm and Coconut Oil with Different Moisture

2018 ◽  
Vol 12 (1) ◽  
pp. 363
Author(s):  
N. A. M.Jamail ◽  
N. A. Azali ◽  
E. Sulaiman ◽  
Q.E. Kamarudin ◽  
S.M.N.S. Othman ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Water Content ◽  
Breakdown Voltage ◽  
Palm Oil ◽  
Direct Current ◽  
Coconut Oil ◽  
Environmentally Friendly ◽  
Isolation System ◽  
Cooling Agent ◽  
Cell Electrode

<p>Oils acts as insulation and cooling agent in the transformer. Petroleum-based oils are widely used in transformers due to their qualified properties as good insulation materials. Unfortunately, the used of petroleum-based oils has adverse effects on environment in the event of any failure to transformers such as tank leakage or explosions. Therefore, researchers have been studied and have found environmentally friendly oil that is suitable as substitutes in transformer. Thus, breakdown voltage tests using direct current and alternating current with the addition of different water content were performed to identify the potential of palm oil and coconut oil in the transformer isolation system. Refined, Bleached and Deodorized oil (RBDPO) and coconut oil samples were selected to be test in this study. The oil samples were test by varies the gap distance of test cell electrode and the level of water content. As a conclusion, RBDPO oil has greater breakdown voltage test under DC breakdown voltage test in term of increment of the gap distance.</p>

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