1. Investigation of Impulse Breakdown Under Thermal
Aging of 90°C of new Kenaf Fibre Insulation Papers.
By:
Mohd Taufiq Ishak
Department of Electrical and Electronics
1
2. PROJECT SCOPE
Investigation of
impulse breakdown
strength of EFB fibres
insulation paper under
thermal aging of 90°C.
Fabrication of EFB
fibres insulation paper.
Insulation paper is
subjected to power
transformers
2
3. OUTLINE OF PRESENTATION
Introduction
Problem Statement
Objective
Methodology
Results
Conclusion
3
4. Introduction
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
4
Type of
Insulation
Insulating Oil
Insulating
Tape
Pressboard
Wood-Based
Laminates
Insulating
Paper
Cotton
Kraft
PPLP
EFB
5. Introduction
Impulse Voltage
Switching Surge Lightning Impulse
Very short high voltage that rise
quickly and slowly decaying to
zero
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
5
6. Problem Statements
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
6
Rapid development
of large industries
High demand of
power transformer
Demand for
insulation system
Lack of resources
• Most popular
material used for
insulation
system
• Expensive
• Take a longer
time to harvest
• Continuous
supply in
Malaysia
• No commercial
values.
EFB
Softwood
Fiber
7. Objective
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
7
To Investigate the Impulse Breakdown Under Thermal
Aging of 90°C of Mixed Kenaf Fibre and EFB Fibre
Insulation Papers
To compare and
relate the result
with the previous
research based on
literature review
To conduct an
experiment of
impulse
breakdown
strength of new
insulating paper
To analyse the
impulse
breakdown
strength of mixed
of Kenaf fibre and
EFB fibre
insulation paper
8. Methodology
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
8
Testing
Tensile Strength
Volume
Resistivity
Dielectric
Behaviour
Breakdown
Strength
Kraft insulation paper
EFB fibre insulation
paper
Thermal
Stability
9. Methodology
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
9
To compare
and relate the
result with the
previous
research
based on
literature
review
Literature review based on the
previous research
Gather information on how to conduct
an experiment
Propose the
method to
conduct the
experiment and
expected result
10. Methodology
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
10
To conduct an
experiment of
impulse breakdown
strength of new
insulating paper
Refer to the standard IEC 60243-1:2013
Use specific machine to conduct experiment
Collect and
concluded the
data
To analyse the
impulse
breakdown
strength of new
EFB fibre
insulation paper
Compare the result with present insulating
paper
Relate the result obtained with literature
review
Build graph of
breakdown
strength to see
the pattern
12. OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
12
Insulating Paper Preparation
Filter the transformer oil
Dry the transformer oil and insulating paper in the oven at 85°C for 48 hours
Soak the insulating paper in the transformer oil with the ratio of 1:20 for 24 hours at ambient
temperature
START
END
Insert the bottle in the oven at 90°C for 30 days (AGING)
14. OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
14
Impulse Breakdown Testing
Take out the bottle from the oven
Placed the insulating paper between two metal cylindrical electrodes
Observe the breakdown voltage and waveform
START
END
YES
NO
Set the charging voltage
Wait until the multistage generator have a full charge
Impulse generator will generate
TEST
Make the grounding to the electrodes
Repeat for another sample
16. Results
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
16
- The higher the aging temperature, the
lower the voltage breakdown will be.
- This is because, the fibre will damage
when being aged at high temperature over
a long period.
- As the thicker the insulating paper, the
breakdown voltage will higher too.
- This is because, the activation energy
become decrease as the thickness
insulating paper increase.
17. Results : BREADOWN VOLTAGE FOR MIXED OF EFB
FIBER
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
17
- As the Kenaf ratio
decrease, the
breakdown
voltage also
decrease.
- This is because,
Kenaf have long
fibres
arrangements that
cause better
fibres-to-fibres
bonding.
18. Results
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
18
PAPER 5% Conf.
to
breakdown,
kV/mm
50% Conf.
to
breakdown,
kV/mm
95% Conf.
to
breakdown,
kV/mm
K0 E100 26 27 27.2
K25 E75 26 27 27.3
K50 E50 27 27.5 27.7
K75 E25 27.5 27.7 28
K100 E0 31 31.3 31.5
Weibull distribution and parameter of mixed of Kenaf fibres and EFB fibres insulation paper that being not aged.
19. Results : BREAKDOWN VOLTAGE FOR MIXED OF
EFB FIBER AT 90℃
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
19
- As the EFB ratio
decrease, the
breakdown
voltage decrease
too.
- EFB have short
fibres
arrangements that
cause to the least
leaving voids
between fibres-to-
fibres bonding.
20. Results
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
20
PAPER 5% Conf.
to
breakdown,
kV/mm
50% Conf.
to
breakdown,
kV/mm
95% Conf.
to
breakdown,
kV/mm
K0 E100 22 26.2 30.5
K25 E75 17.8 26 33.5
K50 E50 18.2 25.6 29.5
K75 E25 17.4 22.3 32.7
K100 E0 16.9 24.2 30
Weibull distribution and parameter of mixed of Kenaf fibres and EFB fibres insulation paper that being aged at 90°C.
21. Results : EFB FIBER
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
21
BEFORE AGING AFTER AGING AT 90°C
22. Conclusion
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
22
- The breakdown
strength of mixed
of Kenaf fibres
and EFB fibres
insulating paper is
higher than Kraft
insulating paper.
- Mixed of Kenaf
fibres and EFB
fibres insulating
paper has a
potential to be
used as an
insulation for
power
transformers.
Impuls breakdown kV/mm : Before & after ageing 90℃
23. Conclusion
OBJECTIVE METHODOLOGY RESULTS CONCLUSION
PROBLEM
STATEMENTS
INTRODUCTION
23
PAPER PERCENTAGE DROP
Kraft (0.06) -9.96%
Kraft (0.08) -6.43%
Kraft (0.12) -13.23%
K0 E100 -3.75%
Impuls breakdown kV/mm : Before & after ageing 90℃
24. Reference
24
[1] Jianwen Huang, Ling Zhang, Yuanxiang Zhou and Meng Huang. “Study on The Suitability of
Bamboo Fibre for Manufacturing Insulating Presspaper”, IEEE Transactions on Dielectrics and
Electrical Insulation. , Vol. 23, pp. 3641 – 3651, 2016.
[2] X.Q.Qiu and I.D.Chalmers. “The Effect of Initiatory Electrons on Breakdown Characteristics in
Highly Nonuniform Gap”, Conference Record of the 1996 IEEE International Symposium on Electrical
Insulation, pp 787 – 788, 1996.
[3] Heli Ni, Ning Guo, Yi Zhao, Weixiong Yuan, Xuandong Liu, Qiaogen Zhang and Tonglei Wang.
“The Effect of Wavefront on the Breakdown Characteristics of Transformer Oil under Positive Impulse
Voltage”, 12th IEEE International Conference on the Properties and Applications of Dielectric
Materials, pp. 1074 – 1077, 2018.
[4] Zhao Tao, Liu Yunpeng, Lv Fangcheng, Cheng Xiangrui, Wang Zibo, Wang Fochi and Xie Ching.
“Breakdown Characteristics of Transformer Oil Insulation under Impulse Voltage with Different
Waveform Parameters”, 2017 Electrical Insulation Conference (EIC), pp. 368 – 371, 2017.
[5] European Standard IES 60243-1. “Electric Strength of Insulating Materials – Test Methods – Part
1: Tests at Power Frequencies”, British Standard Insulation (BSI). , 2013.
[6] Houssni El-Saied, Magda G. El-Meligy, Samar H. Mohames and S. Abd El-Mongy. “Electrical
insulated paper from cotton linter”, Carbohydrates Polymers 90, pp. 147 – 151, 2012.
[7] Tamer Y.A Fahmy, Magda G. El-Meligy and Fardous Mobarak. “Introducing deinked old
newsprint as a new resources of electrical purposes paper”, Carbohydrate Polymer 74, pp. 442 – 444,
2008.
[8] Tomohiro Kawashima, Yuta Kitagawa, Yoshinobu Murakami, Nsohiro Hozumi and Masayuki
Nagao. “Influence of Charge Behavior on Breakdown Strength of Kraft Paper in Liquid Nitrogen”.
2016 International Electronics Symposium (IES), pp. 234 – 237, 2006.
[9] Inmaculada Fernadez, Fernando Delgado, Felix Ortis, Alfredo Ortiz, Cristina Frenandez, Carlos J.
Renedo and Agustin Santisteban. “Thermal degradation assessment of Kraft paper in power
transformers insulated with natural esters”, Applied Thermal Engineering 104, pp. 129 – 138, 2016.
[10] Ik-Soo Kwoon, Jae-Sang Hwang, Jae-Hong Koo, Jin-Yong Na and Bang-Wook Lee.
“Comparison of the Electrical Conductivity of Polypropylene Laminated Paper (PPLP) and Kraft in
LN2 According to the Numbers of Layers”, IEE Transaction on Applied Superconductivity, Vol 26,
2016.
[11] Thomas B. Worzyk, Mikael Bergkvist, Per Nordberg and Christer Tornkvist. “Breakdown Voltage
of Polypropylene Laminated Paper (PPLP) in Plain Samples and a Full Scale Cable”, IEREE Annual
Report-Conference on Electrical Insulation and Dielectric Phenomena. pp. 299-333, 1997.
[12] W.J. Kim, S.H. Kim, H. J. Kim, J. W. Cho, J. S. Lee and H. G. Lee “The Fundamental
Characteristics of PPLP as Insulating Material for HTS DC Cable”, IEEE Transaction on Applied
Superconductivity, Vol 23. 2013.
[13] Rafidah, D., Ainun, Z. M.A., Hazwani, H,A., Rushdan, I., Luqman, C.A., Sharmiza, A., Paridah,
M.T. and Jalaludin, H. “Characterisation of Pulp and Paper Manufactured from Oil Palm Empty Fruit
Bunches and Kenaf Fibres”, Universiti Putra Malatsia Press, pp. 449 – 457, 2017.
[14] Rushdan Ibrahim. “Structural, Mechanical and Optical Properties of Recycled Paper Blended with
Oil Palm Empty Fruit Bunch Pulp”. pp. 28 – 34, 2003.
[15] Orinno. “Diamond Dottep Insulation Paper”. 2018.
[16] Weidmann. “Electrical Insulating Paper”. pp. 13 -14, 2018.
[17] A.A. Abdelmalik, J.C. Fothergill and S.J. Dodd “Aging of Kraft Paper Insulation in Natural Ester
Dieletric Fluid”, 2013 IEEE International Conference on Solid Dieletrics. pp. 541-544, 2013.
[18] Hehuan Ran, Jian Li, Jing Zhang, Xudong Li and Junsheng Chen. “Influence of Temperature and
Thermal Aging on Breakdown Voltage of Oil-paper Insulation”, School of Electrical Engineering
Chongqing University, China. 2016.
[19] L.A. Chmura, P.H.F. Murshuis, E. Gulski and J.J Smit. “Time-to-breakdown and breakdown
voltage for oil-impregnated insulation subjected to thermal aging”, 2012 International Conference on
High Voltage Engineering and Application. pp. 233-236. 2012.
[20] Ramesh Chandrashekar, Sushil E.Chaudhari, Pramod K.Bajpai and Rajev Mehta. “Development
in Insulating Paper for Power Transformers”. Global R&D Center, Mumbai, Maharashtra, India. 2012
[21] Ira Mardya Sari, Suwarno and Tobias Kinkedly. “Effect of Thermal Aging on the mechanical
characteristic of Insulating Paper Impregnated with Different Insulating Oils”. Institut Teknologi
Bandung, Indonesia. 2018.
[22] Abi Munajad, Cahyo Subroto and Suwarno. “Study on the Effects of Thermal Aging on Insulating
Paper for High Voltage Transformer Composite with Natural Ester from Palm Oil Using FTIR and
EDS”. Institut Teknologi Bandung, Indonesia. 2017.
[23] Kevin Rapp, Alan Sbravati, John Luksich and David Bingenheimer. “Oxidation Aging and
Resulting Dielectric Performance of a Natural Ester Insulation System for Transformers”. 23rd
International Conference on Electricity Distribution. 2015.
[24] I. Fofana, A.Bouaicha and M.Farzaneh. “Characterization of Aging Transformer Oil-Pressboard
Insulation Using Some Modern Diagnostic Technique”. European Transaction on Electrical Power. pp.
1110-1127. 2010.
[25] Yunus Bicen, Yusuf Ciliyuz, Faruk Aras and Guzide Aydugan. “Aging of Paper in Natural Ester
and Mineral Oil”. Industrial Electronics Department, Turkey. pp. 141-146. 2012.
[26] Vineeth Nambiar, “Generation of Impulse Voltage and Current”.
2017.https://www.slideshare.net/VINEETHKUMARPK/10ee73-high-voltage-engineering-chapter-
5presentation-part-b-chapter-5
[27] Agnes C. Sequino, Jessica Avenido. “The World’s Leader in the Palm Oil Industry”. International
Journal of Ecology and Conservation”. Cagayan de Oro City. pp 152-164, 2015.
