An Experience of Ageing on XLPE Insulation.

PROGRAM M E

BOOK

Institute of High Voltage and High Current     (IVAT) 

Faculty of Electrical Engineering        (FKE) 

Organizer 

 

Co-organizer

ACED 2012 Secretariat

Institute of High Voltage and High Current Block P06, Faculty of Electrical Engineering Universiti Teknologi Malaysia

81310 Johor Bahru, Johor, Malaysia

Phone/Fax : +60-7-5535432/ +60-7-5578150 E-mail : aced_secretariat@fke.utm.my

 

List of Paper ID For Presentation. 

A003 Electrical Characteristics of Polyvinyl Chloride with Wollastonite Filler for High Voltage Outdoor Insulation Material

MM Yaacob, A Aman, NA Mazlan, NF Noramat and N

Kamaruddin

Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia A004 Review of Partial Discharge Signal Monitoring in Power

Transformer using Chromatic Approach

MM Yaacob and MA AlSaedi

Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia A005 Effect of High Voltage Electric field (AC) on Pineapple Ali Mohammad Dastgheib*, Zolkafle Buntat1, S. M. Zafar

Iqbal2

Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia

A006 Influence of Very Fast Voltage-Oscillation with Polarity Reversal on Partial Discharge Inception Voltage for Twisted Enameled-Wires

Kazunori Kadowaki*, Yujiro Takemura

Ehime University, Graduate School of Science and

Engineering, Bunkyo-Cho 3, Matsuyama, Ehime, 790-8577, Japan

A007 Optical Measurement of Space Charge Distribution in a

Dielectric Liquid

Haruo Ihori*, Hayato Nakao, Masaharu Fujii

Faculty of Engineering, Ehime University 3, Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan

A008 Organo-Monmorillonite as a New Organic Filler For

Electrical Tree Inhibition

A. A. A. Jamil*1, M. H. Ahmad2, M. Kamarol1, Y. Z. Arief 2, M. Mariatti3, M. U. Wahit4

 

1School of Electrical and Electronics Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.

2_{Institute of High Voltage and High Current, Faculty of}

Electrical Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor Darul Ta’azim, Malaysia.

3

School of Material and Mineral Resources Engineering Engineering Campus,Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. 4Department of Polymer, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor Darul Ta’azim, Malaysia.

A009 Thermal Image and Leakage Current as tools for Testing

and Condition Monitoring of ZnO Surge Arresters Novizon1,2, Zulkurnain Abdul Malek1, Nouruddeen Bashir

Umar1, Nur Asilah Abdul Ghafar1

1Universiti Teknologi Malaysia (UTM), Malaysia. 2University of Andalas (UNAND), Indonesia

A010 Streak Observation of Dc Pre-breakdown Phenomenon in

Silicone Oil/low density polyethylene (LDPE) by Using a 20m Long Image Guide Scope

Amir I. Mohamed*, Y. Miyamoto, K. Kadowaki

Ehime University. *University Malaysia Pahang

A011 Considering on the Current Time Front Effect on the Vertical Electric Fields Due to Lightning Channel at Non-Perfect Ground Conductivity Condition

Mahdi Izadi*, Mohd Zainal Abidin Ab Kadir, Chandima

Gomes

Centre of Excellence on Lightning Protection (CELP), Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

A012 Condition Assessment of High Voltage Instrument

Transformer Using Partial Discharge Analysis

Mohd Aizam Talib*, A. Suffian A. Bakar1, S. Gobi Kannan2 *,1TNB Research Sdn Bhd, No 1 Jalan Air Itam 43000 Kajang,

 

Crystal Plaza, Jalan 223/51A, 46100 Petaling Jaya, Selangor, Malaysia

A013 Ozone Generation Properties of Screw Electrode Ozonizer

by Different Electrodes with Different Screw Thread

Satoshi Myoyo*, Takuma Tanaka , Bunpei Ueda, Tomoyuki

Fujishima, Takahiko Yamashita

Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-Machi, Nagasaki, Japan

A014 Influence of Divided Electrodes on Ozone Generation Properties and Effect of Ozone Concentrations on Soil Sterilization

Takuma Tanaka*, Satoshi Myoyo, Bunpei Ueda, Tomoyuki

Fujishima, Takahiko Yamashita

Nagasaki University, 1-14 Bunkyo-Machi, Nagasaki, Japan

A015 Comparative Study on Space Charge Distribution

Measurements using PEA and PWP Methods on High Voltage Insulation.

N. A. Othman1 , M. A. M. Piah1, Z. Adzis1

1Faculty of Electrical Engineering, University Teknologi Malaysia (UTM), Malaysia

A016 Current Distribution Model for Partial Discharge Propagation in High Voltage Transformer

Ramizi Mohamed1, Paul L. Lewin

1Department of Electrical, Electronic & Systems Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia. 2School of Electronics and Computer Science, University of Southampton, Southampton, SO17 1BJ, United Kingdom

A017 Impedance Property of Lightning Impulse Discharge in

Water Gap

Daisuke Okano*

Liberal Arts Education Center, Tokai University, 9-1-1 Toroku Higashiku, Kumamoto, 862-8652 Japan

 

A019 Influence of Gas Pressure on SF6 Dissociation and

Simulation in Initial Decomposition Products Under AC Corona Discharge

Yan-bo Yang*, Ming Dong1, Jin Miao1，Zhong Ren

1

, Xue-Zhou Wu1

High Voltage Division, School of Electrical Engineering, Xi’an Jiaotong University,28 West Road of Xianning, Xi’an, Shaanxi Province, P. R. China, 710049

A020 Breakdown Characteristics of Transformer Oil-Based

Nanofluids

Jin Miao*, Ming Dong1, Liang-Ping Shen2, Yan-Bo Yang1 High Voltage Division, School of Electrical Engineering,

Xi’an Jiaotong University, Faculty of Physics and Electronic Technology, Hubei University, 28 West Road of Xianning, Xi’an, Shaanxi Province, P. R. China, 710049

A024 Currents and Electric Fields Induced in Anatomically-Realistic Human Models by Elf Electric Fields

Hiroo Tarao1*, Noriyuki Hayashi2, Takashi Matsumoto3, And Katsuo Isaka4

1Kagawa National College of Technology, Japan. 2University of Miyazaki, Japan. 3Anan National College of Technology, Japan. 4The University of Tokushima, Japan

A025 Performance of Silane Epoxy Resin Insulator under

Tropical Climate Condition

Abdul Syakur1, Hamzah Berahim1, Tumiran1, Rochmadi2 1Department of Electrical Engineering and Information

Technology, Faculty of Engineering, Gadjah Mada

University. 2Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, Jl. Grafika 2 Sekip Yogyakarta 55281 Indonesia

A026 RVM versus PDC Methods for Insulations Conductivity

and Moisture Content Monitoring

R. A. Zainir1 , N. A. Muhamad1 , Z. Adzis1 , N. A. M. Jamail1,2, M. A. M. Piah1, N. F. Kasri1

 

1Faculty of Electrical Engineering, Universiti Teknologi Malaysia(UTM), Skudai, Johor, Malaysia. 2Faculty of Electrical and Electronic, University of Tun Hussein Onn Malaysia(UTHM), Batu Pahat, Johor, Malaysia

A027 Effect of Switching Method in Polarization and

Depolarization Current (PDC) Measurement Technique N. F. Kasri*, 1, M. A. M. Piah1, N. A. Muhamad1, N. A. M.

Jamail1, 2

1Faculty of Electrical Engineering, University Technology Malaysia, Johor Bahru, Johor, Malaysia. 2Faculty of Electrical and Electronic, University Of Tun Hussein Onn Malaysia, Batu Pahat, Johor, Malaysia

A028 Partial Discharge Detection In Gis Under Impulse Voltage By Using Photoelectric Sensors

Zhong Ren*, Ming Dong, Ming Ren, Haibin Zhou, Lei Zheng

State Key Laboratory of Electrical Insulation For Power Equipment, Xi’an Jiao Tong University, 28 West Road of Xianning, Xi’an, Shaanxi Province, P. R. China, 710049

A029 Removal Cox Gases by Using Corona Discharge

Agung Warsito, Abdul Syakur, Desatario Yan Prasetya

Department of Electrical Engineering, Faculty of

Engineering, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang, 50275 Indonesia

A030 Measurement of 2-Dimensional Electron Density

Distribution in Extinguishing Atmospheric Arc Using Sensitive Shack-Hartmann Type Laser Wavefront Sensor Yuki Inada*, Shigeyasu Matsuoka, Akiko Kumada, Hisatoshi

Ikeda, Kunihiko Hidaka

Department of Electrical Engineering and Information Systems, The University of Tokyo, Japan

A031 Optical Measurements of High Electric Field Strength in a Dielectric Liquid with Large Kerr Constant

Hayato Nakao*, Masaharu Fujii, Haruo Ihori

 

Matsuyama, Ehime, 790-8577, Japan

A032 The Prapagation Speed of Low Pressure Discharge with

Special Attention to Blue Jets and Sprites

Mahbubur Rahman, And Vernon Corray

The Ångström Laboratory, Division For Electricity,

Department of Engineering Sciences, Uppsala University, Box 534, SE-752 21 Uppsala, Sweden

A033 Streamer-To-Leader Transition across Surface/Gaseous

Gap in Sf6/N2 Gas Mixture

Hiroshi Moriyama*, Shigeyasu Matsuoka, Akiko Kumada,

Kunihiko Hidaka

Department of Electrical Engineering and Information Systems, the University of Tokyo, Japan

A034 Propagation Characteristics of Surface Discharge under Positive Impulse Application Voltage

Junbo Deng1, Shigeyasu Matsuoka2，Akiko Kumada

2

，

Kunihiko Hidaka2，Haibao Mu

1

, Guanjun Zhang1 1State Key Laboratory of Electrical Insulation and Power

Equipment, Xi’an Jiaotong University, Xi’an, 710049. 2The University of Tokyo, Tokyo, Japan, 113-8586

A035 Pearl-Chain-Type Tree in Silicone Rubber Gel under AC

Voltage

Masaharu Fujii*, Haruo Ihori, and Hyeon-Gu Jeon

Graduate School of Engineering, Ehime University, 3 Bunkyo, Matsuyama, Ehime 790-8577 Japan

A037 Study of Pollution Performance on a Wind Turbine Blade

using OES Technique for Lightning and Switching Impulse Voltage Profiles

V. Sathiesh Kumar*1, Nilesh J. Vasa1, R. Sarathi2 1Department of Engineering Design, Indian Institute of

Technology Madras, Chennai 600036, India. 2Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, India

 

A038 Breakdown Strength Characteristic of RBDPO and

Mineral Oil Mixture as an Alternative Insulating Liquid for Transformer

Yusnida M. Y, M Kamarol*, Shahid Iqbal

Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia

A040 Multi-Station Short Baseline Lightning Monitoring System

A. S. M. Amir*, W. I. Ibrahim

Sustainable Energy & Power Electronics Research (SuPER), Faculty of Elecrical & Electronics Engineering Universiti Malaysia Pahang, Pekan 26600, Pahang

A041 Effect of Phase Order on Magnetic Field Distribution under EHV and HV Double-Circuit Power Lines which Change their Direction

T. Matsumoto1*, H. Hirata1, H. Tarao2, N. Hayashi3, and K. Isaka4

1Anan National College of Technology. 2Kagawa National College of Technology. 3University of Miyazaki. 4The University of Tokushima

A042 Influence of Discharge Mode on Decomposition of Toluene

Gas Subjected To Very Short Voltage Pulses with Polarity Reversal

Atsushi Yoshida*, Kazunori Kadowaki

Ehime University, Graduate School of Science and

Engineering, Bunkyo-Cho 3, Matsuyama, Ehime, 790-8577, Japan

A043 Dependence of Breakdown Time Lag of Low Density

Polyethylene under DC Electric Field

Takashi Akagi*, Amir Izzani Mohamed , Kazunori Kadowaki

Ehime University, Graduate School of Science and

Engineering, Bunkyo-cho 3, Matsuyama, Ehime, 790-8577, Japan

A044 Lightning Fatalities in Malaysia

 

Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia

A046 Mitigation of Ferroresonance in Power Transmission

System using Series Compensator

Amir Hasam Khavari*, Zulkurnain Abdul Malek

Universiti Teknologi Malaysia (UTM)

A047 Localised Single-Station Lightning Detection by using TOA Method

Behnam Salimi*, Saeed Vahabi Mashak, Kamyar

Mehranzamir, Hadi Nabipour Afrouzi, Zulkurnain Abdul Malek

Institute of High Voltage and High Current (IVAT), Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia

A048 Preliminary Investigation on Very Low Frequency

Method for Electrical Machine Insulation Diagnostic

Hadi Nabipour Afrouzi*, Kamyar Mehranzamir, Saeed Vahabi

Mashak, Behnam Salimi, Zulkurnain Abdul Malek

Institute of High Voltage and High Current (IVAT), Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia A049 Investigation of Ferroresonance Mitigation Techniques in

33kV/110kV Voltage Transformer using ATP-EMTP Simulation

Kamyar Mehranzamir*, Hadi Nabipour Afrouzi , Behnam

Salimi, Saeed Vahabi Mashak, Zulkurnain Abdul Malek Institute of High Voltage and High Current (IVAT), Universiti

Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia A050 Cost-Benefit and Emission Analysis of Hybrid Electric

Vehicles Using Homer

Sajad A. Anbaran*, Amir Hesam Khavari, Jalal Tavalaei, Zulkurnain Abdul Malek

Universiti Teknologi Malaysia (UTM)

A051 Analysis of Hybrid Wind/Diesel Energy System in Wind

 

Amir Hesam Khavari*, Jalal Tavalaei, Sadjad Abdolahzadeh Anbaran, Zulkurnain Abdul Malek, Nouradin Hashemi Universiti Teknologi Malaysia (UTM)

A052 Effect of Water on Electrical Properties of Refined, Bleached, and Deodorized Palm Oil as Electrical Insulating Material

Nazera Ismail1* and Y. Z. Arief1

1Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

A053 The Effects of Organic-Montmorillonite (OMMT) on

Electrical Treeing in Epoxy Resin under AC Ramp Voltage

M. H. I. Saad*, Y. Z. Arief, M. H. Ahmad

Institute of High Voltage and High Current, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia

A054 Flashover Phenomena across Solid Dielectrics in Vacuum:

Mechanism and Suppression

Guan-Jun Zhang*, Hai-Bao Mu, Jun-Bo Deng, Jiang-Yang

Zhan, Wen-Wei Shen

State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, P. R. China

A055 Effects of Low-Temperature Plasma on Biological Cells Guan-Jun Zhang*1, Zheng-Shi Chang1, Xing-Min Shi2,

Zhuo-Yuan Dong1, Wen-Long Liao1

1 State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, P. R. China. 2 Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Medicine, Xi’an Jiaotong University, 76 Yanta West Road, Xi’an, Shaanxi 710061, P. R. China

 

A056 Probability of Ferroresonance Phenomenon Occurrence in

Distribution Voltage Transformers Using Series RLC equivalent circuit with ATP Simulation

Zulkurnain Abdul Malek, Kamyar Mehranzamir*, Behnam

Salimi

Institute of High Voltage and High Current (IVAT), Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia A057 Analysis of Damping Circuit of Spark Gap in Series

Compensation Equipment

Bai-Peng Song1*, Wen-Wei Shen1, Wei Song1, Guan-Jun Zhang1, Yu-Gan Niu2, Jun-Liang Wang2, Li-Miao Zhang2, Yi-Qun Zhang2

1State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University. Xi’an, 710049, China.

2_{Pingdingshan Power Supply Company, Pingdingshan, Henan}

467001, China

A059 Analysis and Simulation of a Flyback Converter for Micro Machining Biomedical Component

Nazriah Mahmud*, Azli Yahya, Mohammed Rafiq Abdul

Kadir

Faculty of Health Science and Biomedical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

A061 Potential Distribution Measurement on Stress Grading

System of Inverter-Fed Form Wound Motor Coil K. Kiuchi*, S. Matsuoka, A. Kumada, H. Ikeda, K. Hidaka, The University Of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo,

113-8656, Japan, Y. Tsuboi, K. Ushiwata, Y. Ishikawa, S. Yamada, T. Yoshimitsu, Toshiba Mitsubishi-Electric Industrial Systems Corporation

A062 Partial Discharge Characteristics In Insulation System For Hts Cable

Yuto. Kikuchi*, Shigeyasu Matsuoka, Akiko Kumada,

Kunihiko Hidaka

 

Systems, The University Of Tokyo, Japan

A063 Data Transmission System of REFM Network using

Microcontroller and GSM Module

Mook Boon Kean, Muhammad Abu Bakar Sidik

Institute of High Voltage and High Current, Faculty of Electrical Engineer, Universiti Teknologi Malaysia, 81310, Skudai, Malaysia

A064 Development and Study on Transformer Characteristics

of a High Repetition Pulse Generator

Muhammad Abu Bakar Sidik1,3, Hamizah Shahroom1,

Hussein Ahmad1, Zolkafle Buntat1, Zafar Iqbal1, A. S. Samosir2, Zainuddin Nawawi3, Muhammad 'Irfan Jambak3 1Insitute of High Voltage and Current (IVAT), Faculty of

Electrical Enginnering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. 2Department of Energy Conversion, Faculty of Electrical Engineering, Universiti Teknologi Malaysia. 3Department of Electrical Engineering, Faculty of Engineering, Universitas Sriwijaya 30662 Indralaya, Ogan Ilir, South Sumatera, Indonesia

A065 Atmospheric Electric Field Data Logger System

Muhammad Abu Bakar Sidik1,2, Che Nuru Saniyyati Che

Mohd Shukri1, Hussein Ahmad1, Zolkafle Buntat1,

Nouruddeen Bashir Umar1, Y. Z. Arief1, Zainuddin Nawawi2 1Insitute of High Voltage and Current (IVAT), Faculty of

Electrical EngineeringUniversiti Teknologi Malaysia, 81310 UTM Skudai Johor, Malaysia. 2Department of Electrical Engineering, Faculty of Engineering, Universitas Sriwijaya, 30662 Indralaya, Ogan Ilir, South Sumatera, Indonesia

A066 Study the Ageing of 132KV Surge Arrester by using

Leakage Current Measurement

N. Asilah1, Zulkurnain Abdul Malek 1, Novizon1,2, Wooi Chin Leong1

1High Voltage and High Current Institute, Faculty of Electrical Engineering, Universiti Teknologi Malaysia.

2

 

Padang, Indonesia

A067 Streamer-To-Leader Transition across Surface/Gaseous

Gap in SF6/N2 Gas Mixture

Hiroshi Moriyama*, Shigeyasu Matsuoka, Akiko Kumada,

Kunihiko Hidaka

Department of Electrical Engineering and Information Systems, the University of Tokyo, Japan

A068 Electrical Performance of Insulators Polymeric, Ceramic and Glass under Artificial Tropical Climate Ageing

Salama Manjang, Mustamin

Departemet of Electrical Engineering, Hasanuddin University, Jl. Perintis Kemerdekaan Km 10, Makassar 90245, Indonesia

A069 A Filter-Bank Approach for Extracting Features for the Classification of Partial Discharge Signals in High Voltage XLPE Cables

R. Ambikairajah*, B. T. Phung, J. Ravishankar

School Of Electrical Engineering & Telecommunications, University Of New South Wales

A070 Phenol Removal from Water by Pulsed Power Discharge:

A Review

Hashem Ahmadi1, Muhammad Abu Bakar Sidik1,3, Zolkafle Buntat1, Mehrdad Khamooshi2

1Insitute of High Voltage and Current (IVAT), Faculty of Electrical Enginnering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. 2 Faculty of Mechanical

Engineering, Eastern Mediterranean University, Famagusta, Gazimagusa, North Cyprus. 3Department of Electrical Engineering, Faculty of Engineering, Universitas Sriwijaya 30662 Indralaya, Ogan Ilir, South Sumatera, Indonesia

A071 Inactivation of Melanoma Cells using DBD Plasma Jet in

Atmospheric Pressure Argon

Xing-Min Shi1*, Guan-Jun Zhang2, Zheng-Shi Chang2, Zhao-Yu Peng2, Xian-Jun Shao2

 

1Environment and Genes Related To Diseases Key Laboratory Of Education Ministry, Xi’an Jiaotong University College Of Medicine, 76 Yanta West Road, Xi’an, Shaanxi 710061, China. 2State Key Laboratory Of Electrical Insulation And Power Equipment, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an, Shaanxi 710049, China

A072 Making Permanent Magnet using High Impulse Current

Haryono T.*, Deny Rinaldo*, Prasetyohadi* and Daryadi* *Electrical Engineering and Information Technology

Department Universitas Gadjah Mada, Indonesia 2 Grafica St, Yogyakarta, Indonesia

A074 Study on Partial Discharge Characteristics of Generators: Case Study at Tanjung Bin Power Plant, Johor, Malaysia A. H. Muhamad1, Y. Z. Arief2*, and Z. Adzis

1Tanjung Bin Power Plant, Jalan Tanjung Bin, 82300 Kukup, Johor, Malaysia. 2Institue of High Voltage and High Current, Faculty of Electrical Engineering, University Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

A075 Distinctive Features of Initial Breakdown Process between Ground and Cloud Discharges

M. R. Mohd Esa*,a,b, M. R. Ahmada,c, V. Cooraya

aÅngström Laboratory, Division for Electricity, Department of Engineering Sciences, Box 534, S-751 21, Uppsala University, Sweden. bUniversiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Johor, Malaysia. cUniversiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Malacca, Malaysia

A076 Mitigation of Ferroresonance in Power System by using Facts Devices

Jalal Tavalaei*, Zulkurnain Abdul Malek

Universiti Teknologi Malaysia, 81300 Johor Bahru

A077 Charge Distribution Measurement On Gis Downsized

Model Spacer With Low-Resistance Coating

 

Kunihiko Hidaka1, Yoshikazu Hoshina2, Takanori Yasuoka2, and Masafumi Takei2

1The University of Tokyo, Tokyo, Japan. 2Toshiba Corporation, Kanagawa, Japan

A078 An Experimental Study on Surface Discharge

Characteristics of Different Types of Polymeric Material under AC Voltage

N. Baharin1, Y. Z. Arief*1, W. A. Izzati1, M. Z. H. Makmud2, Z. Adzis1

1Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia. 2School of Science and Technology, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia

A079 Arcing Fault Condition Analysis of Mineral Insulating Transformer Oil by Polarization Depolarization Current (PDC) Measurements

Mohd Aizam Talib*, N. A. Muhamad1, and Zulkurnain Abdul Malek1

*TNB Research Sdn Bhd, No 1 Jalan Air Itam, 43000 Kajang, Selangor, Malaysia. 1Faculty of Electrical Engineering, University of Technology Malaysia, 81310 Skudai, Johor, Malaysia

A080 Polarization and Depolarization Current Measurement of

Polymer Added with Nanoparticles of Silicon Oxide for HV Insulation

N. A. M. Jamail1,2,a* , M. A. M. Piah2,b , N. A. Muhamad2,c , R. A. Zainir2,d , N. F. Kasri2,e

1Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Malaysia. 2Faculty of Electrical Engineering, University Teknologi Malaysia (UTM), Malaysia

A081 Dc Conductivity of Polymer Nanocomposites for Different

Types and Amount of Nano-Filler

 

Zainir2, N. F. Kasri2

1Faculty of Electrical and Electronic, University of Tun Hussein Onn Malaysia (UTHM), Batu Pahat, Johor, Malaysia. 2Faculty of Electrical Engineering, Universiti Teknologi Malaysia(UTM), Skudai, Johor, Malaysia

A083 An Experience of Ageing on XLPE Insulation

W. G. Ariastina*1, A. I. Weking1, I N. S. Kumara1, I. A. D. Giriantari1, I N. Sugiarta2

1Department of Electrical Engineering, Udayana University, Bali-80362, Indonesia. 2PT PLN (PERSERO) Distribution of Bali, South Bali Network Area, Bali-80113, Indonesia

A084 Effect of Design Parameters on Induced Voltage

Evaluation of 33kv Distribution Line

N. Rameli*, M. Z. A. Ab Kadir, M. Izadi, C. Gomes and J. Jasni

Centre For Electromagnetic And Lightning Protection Research (CELP),Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

A085 Early Prevention System for Electrical Flashover Discharge in Gas Insulated Switchgear

M. F. Agos, and N. A. Muhamad*

Institute of High Voltage & High Current, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia A086 Impact of Lightning Strike on Photovoltaic System A. Z. Abidin*1, A. H. A. Bakar2, H. Mokhlis1, H. A. Illias1 *1Department of Electrical Engineering, Faculty of

Engineering University of Malaya, 50603 Kuala Lumpur, Malaysia. 2 University of Malaya Power Energy Dedicated Advanced Center (UMPEDAC), Level 4, Wisma R&D University of Malaya, 50603 Kuala Lumpur, Malaysia A087 Effect of Temperature to Leakage Current of Gapless

Metal Oxide Surge Arrester

C. L. Wooi1, Saeed Vahabi Mashak2, Zulkurnain Abdul Malek 3

 

1,2,3Institut Voltan dan Arus Tinggi, Universiti Teknologi Malaysia, IVAT, Fakulti Kejuruteraan Elektrik, UTM, 81310, Skudai, Johor Bahru, Malaysia.

________________________________________________________________________________________________________________

*W. G. Ariastina, Department of Electrical Engineering, UdayanaUniversity, Kampus Bukit Jimbaran, Bali-80362, Indonesia. Email: w.ariastina@unud.ac.id.

127

A083

AN EXPERIENCE OF AGEING ON XLPE INSULATION

W. G. Ariastina*1, A. I. Weking1, I N. S. Kumara1, I. A. D. Giriantari1, I N. Sugiarta2

1

Department of Electrical Engineering, Udayana University, Bali-80362, Indonesia

2

PT PLN (Persero) Distribution of Bali, South Bali Network Area, Bali-80113, Indonesia Keywords: XLPE insulation, ageing, partial discharges

Abstract: A case study of ageing on XLPE conductor insulation of 20kV primary distribution feeder is presented in this paper. The insulation degradation mainly occurred around conductor tie where the conductor is attached to the post insulator. A section of distribution feeder with defects on the conductor insulation has been examined for this study. Potential losses due to presence of discharges have been investigated by measuring the difference current at locations of the affected conductor. Temperature measurements of the insulation surface have also been carried out. Provisional maintenance procedures were introduced to eliminate the discharges. Measurements of current and surface temperature were repeated nine months after completion of the maintenance work. Results indicated that the discharges have been completely disappeared.

I. INTRODUCTION

Recently, the utilisation of AAAC-S (all aluminium alloy

conductor – sheathed) for distribution network has been

broadened, particularly in South and East part of Bali. In these parts of the island, most of the distribution networks are supplying consumers at tourism areas near beaches. It is well known that the utilisation of the AAAC-S has a number of advantages compared to that of the bare conductors. The AAAC-S has an ability to protect the distribution network from temporary disturbances which are mainly caused by falling kite and nearby tree contacts. Direct contact of airborne pollutants with the conductor strands may also be avoided.

Nevertheless, after a few years of utilisation, problems began to appear on the insulation of the AAAC-S. It was found that the XLPE sheath degrade rapidly, particularly near the insulator tie. Tiny sparks at the degraded sheath section can be observed clearly at night, indicating the occurrence of discharges. Visual observation of the conductor insulation during day time showed burnt sections around the conductor tie. At some sections, the XLPE sheath has been completely disappeared. This situation obviously requires immediate attention and appropriate maintenance measures.

The occurrence of discharges on the distribution network absolutely causes energy losses. The amount of energy loss very much depends on the characteristics of discharges occurred on the conductor. This paper discusses the potential losses due to degradation of the AAAC-S conductor insulation applied to distribution network. Investigation was carried out on a section of 20kV primary distribution feeder. The section consists of 12 poles at which insulation defects were preliminary identified. Flowing current and surface temperature of the conductor were measured around the conductor tie for each pole. The measurements of current and surface temperature were carried out during dry season to reduce risk of being electrified. A comparison of measurement results before and after planned maintenance operation is also discussed in this paper.

II. MEASUREMENT OF CURRENT AND TEMPERATURE The effects of the insulation defects on potential power losses have been investigated on a series of twelve poles with

impaired conductor sheath. The poles support conductors that are part of a 20kV primary distribution feeder. The feeder lied adjacent to a main road and is approximately 500m from coast line. There are no electrical loads within the twelve poles.

Two medium voltage clamp meters were used to measure potential loss due to the presence of defects. One clamp meter wasplaced before the conductor tie, while the other was placed after the tie, in referred to the current flow. The difference of current measured between the two is considered as the difference current. The difference current indicates potential power losses at the defect location. Measurements of the difference current were carried out for the three phases and for the twelve poles.

Following the identification of the insulation damage, a life maintenance procedure was carried out. This work was aimed to prevent further defect on the conductor strand due to high energy discharges. The work includes tie changed and removal of the affected conductor sheath. Consequently there are some parts of the lines became completely bared at the tie points.

An infrared thermo vision camera was utilised to examine the conductor surface temperature before and after maintenance process. For each location of the degraded insulation, images were taken before and after maintenance works were completed. Results of the two measurements then can be compared and analysed. A reduction of surface temperature is expected when the sparks at the degraded insulation are diminished.

III. RESULTS AND DISCUSSIONS 1. Current Measurement

The current measurement results of the red phase for the twelve poles before maintenance are presented in Figure 1. Bars with darker colour indicate incoming current (I0), while those with lighter colour indicate outgoing current (I1). It is clear that the difference current exists which is indicating the potential power loss at most of damaged insulation sections.

Figure 1. Measured current of red phase

The measured quantity of flowing current on the conductor depends on the load of the remaining part of the feeder at the time of measurement. The magnitude of difference current

varies from point to point of measurements, with an average value of 0.108A for the red phase and of 0.117A for the yellow and the blue phases.

Potential power loss at all phases was identified at seven out of twelve explored poles, while potential power loss at only one phase was discovered for one pole. This fact indicates that the insulation damage occurred around conductor tie at all the investigated twelve poles. The results also designate that at 91% of the total number of poles, the insulation ageing involves two or more phases.

Following the identification of defects on the XLPE insulation, immediate life maintenance works were carried out to prevent further defects on the conductor. Measurements of the flowing current were repeated after completion of the maintenance. There was no indication of difference current during the second measurement.

2. Temperature Measurement

As complement of current detection, measurements of surface temperature of the XLPE sheath were also carried out. The temperature of the insulation surface may provide information of existence of discharges. Note that the measured temperature does not indicate the temperature of sparks appeared on some locations of the insulation defects. The indicated values are the average temperature of insulation surface near damaged points. Similar to that of current measurement, the temperature measurement was also carried out before and after the completion of the maintenance works.

The average temperature of the XLPE sheath surface near defect locations (before maintenance) is slightly above 30°C. In contrast, after completion of the maintenance works, the approximate average XLPE sheath surface temperature became 26.5°C. There was a reduction of about 3.5°C in surface temperature of the XLPE sheath after maintenance process was completed.

IV. CONCLUSIONS

Investigation of ageing on XLPE insulation of a 20kV primary distribution feeder has been carried out. Initial measurement results indicated that there are high potential losses due to the presence of discharges. Measurements of the XLPE sheath surface temperature confirmed the situation.

It is not clear however; whether the fast ageing process of the XLPE insulation was caused by production imperfection of the conductor or due to improper installation and application of the conductor. The fact that most discharges that promote ageing on the XLPE sheath were located on the conductor tie exhibit that advanced explorations are required. Further investigation has been planned to look at this issue in the future.

REFERENCES

[1] PT. PLN (Persero), “PLN Standard 41-8-1981: All Aluminium Alloy Conductor” (in Indonesian).

[2] PT. PLN (Persero), “PLN Standard 41-10-1991: All Aluminium Alloy Conductor-Sheathed” (in Indonesian).

[3] PT. PLN (Persero), “PLN Standard 3λ-1-1λ81μ Power Cable Tests” (in Indonesian).

[4] I N Sugiarta, “A Study of Partial Discharge Phenomena on AAAC-S Conductor Ties in East Bali 20kV Distribution Network”, Udayana University, 2011 (in Indonesian).

[5] A. Garton, S. Bamji, A. Bulinski and J. Densley, “Oxidation and Water Tree Formation in Service-Aged XLPE Cable Insulation”, IEEE Trans. Electr. Insul., Vol. EI-22, No. 4, pp. 405-412, 1987. [6] J. L. Parpal, J. P. Crine and C. Dang, “Electrical Aging of Extruded

Dielectric Cablesμ A Physical Model”, IEEE Trans. Dielectr. Electr. Insul., Vol. 4, No. 2, pp. 197-209, 1997.

[7] G. C. Montanari, C. Laurent, G. Teyssedre, A. Campus and U. H. Nilsson, “From LDPE to XLPEμ Investigating the Change of Electrical Properties. Part I: Space Charge, Conduction and Lifetime”, IEEE Trans. Dielectr. Electr. Insul., Vol. 12, No. 3, pp. 438-446, 2005.

[8] E. S. Cooper, L. A. Dissado and J. C. Fothergill, “Application of Thermoelectric Aging Models to Polymeric Insulation in Cable Geometry”, IEEE Trans. Dielectr. Electr. Insul., Vol. 12, No. 1, pp. 1-10, Feb. 2005.

[λ] M. S. Mashikian and A. Szatkowski, “Medium Voltage Cable Defects Revealed by Off-Line Partial Discharge Testing at Power Frequency”, IEEE Electr. Insul. Mag, Vol. 22, No. 4, pp. 24-32, 2006.

[10] G. C. Montanari, A. Cavallini, F. Puletti, “A New Approach to Partial Discharge Testing of HV Cable Systems”, IEEE Electr. Insul. Mag,Vol. 22, No. 1, pp. 14-23, 2006.

[11] W. Li at. al., “Frequency Dependence of Breakdown Performance of XLPE with Different Artificial Defects”, IEEE Trans. Dielectr. Electr. Insul., Vol. 19, No. 4, pp. 1351-1359, 2012.

 

1Environment and Genes Related To Diseases Key Laboratory Of Education Ministry, Xi’an Jiaotong University College Of Medicine, 76 Yanta West Road, Xi’an, Shaanxi 710061, China. 2State Key Laboratory Of Electrical Insulation And Power Equipment, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an, Shaanxi 710049, China

A072 Making Permanent Magnet using High Impulse Current Haryono T.*, Deny Rinaldo*, Prasetyohadi* and Daryadi* *Electrical Engineering and Information Technology

Department Universitas Gadjah Mada, Indonesia 2 Grafica St, Yogyakarta, Indonesia

A074 Study on Partial Discharge Characteristics of Generators: Case Study at Tanjung Bin Power Plant, Johor, Malaysia A. H. Muhamad1, Y. Z. Arief2*, and Z. Adzis

1Tanjung Bin Power Plant, Jalan Tanjung Bin, 82300 Kukup, Johor, Malaysia. 2Institue of High Voltage and High Current, Faculty of Electrical Engineering, University Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

A075 Distinctive Features of Initial Breakdown Process between Ground and Cloud Discharges

M. R. Mohd Esa*,a,b, M. R. Ahmada,c, V. Cooraya

aÅngström Laboratory, Division for Electricity, Department of Engineering Sciences, Box 534, S-751 21, Uppsala University, Sweden. bUniversiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Johor, Malaysia. cUniversiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Malacca, Malaysia

A076 Mitigation of Ferroresonance in Power System by using Facts Devices

Jalal Tavalaei*, Zulkurnain Abdul Malek

Universiti Teknologi Malaysia, 81300 Johor Bahru

[ACED 2012 PROGRAMME BOOK] 

33

 

 

 

 

Kunihiko Hidaka1, Yoshikazu Hoshina2, Takanori Yasuoka2, and Masafumi Takei2

1The University of Tokyo, Tokyo, Japan. 2Toshiba Corporation, Kanagawa, Japan

A078 An Experimental Study on Surface Discharge

Characteristics of Different Types of Polymeric Material under AC Voltage

N. Baharin1, Y. Z. Arief*1, W. A. Izzati1, M. Z. H. Makmud2, Z. Adzis1

1Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia. 2School of Science and Technology, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia

A079 Arcing Fault Condition Analysis of Mineral Insulating Transformer Oil by Polarization Depolarization Current (PDC) Measurements

Mohd Aizam Talib*, N. A. Muhamad1, and Zulkurnain Abdul Malek1

*TNB Research Sdn Bhd, No 1 Jalan Air Itam, 43000 Kajang, Selangor, Malaysia. 1Faculty of Electrical Engineering, University of Technology Malaysia, 81310 Skudai, Johor, Malaysia

A080 Polarization and Depolarization Current Measurement of Polymer Added with Nanoparticles of Silicon Oxide for HV Insulation

N. A. M. Jamail1,2,a* , M. A. M. Piah2,b , N. A. Muhamad2,c , R. A. Zainir2,d , N. F. Kasri2,e

1Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Malaysia. 2Faculty of Electrical Engineering, University Teknologi Malaysia (UTM), Malaysia

A081 Dc Conductivity of Polymer Nanocomposites for Different Types and Amount of Nano-Filler

 

Zainir2, N. F. Kasri2

1Faculty of Electrical and Electronic, University of Tun Hussein Onn Malaysia (UTHM), Batu Pahat, Johor, Malaysia. 2Faculty of Electrical Engineering, Universiti Teknologi Malaysia(UTM), Skudai, Johor, Malaysia

A083 An Experience of Ageing on XLPE Insulation

W. G. Ariastina*1, A. I. Weking1, I N. S. Kumara1, I. A. D. Giriantari1, I N. Sugiarta2

1Department of Electrical Engineering, Udayana University, Bali-80362, Indonesia. 2PT PLN (PERSERO) Distribution of Bali, South Bali Network Area, Bali-80113, Indonesia

A084 Effect of Design Parameters on Induced Voltage Evaluation of 33kv Distribution Line

N. Rameli*, M. Z. A. Ab Kadir, M. Izadi, C. Gomes and J. Jasni

Centre For Electromagnetic And Lightning Protection Research (CELP),Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

A085 Early Prevention System for Electrical Flashover Discharge in Gas Insulated Switchgear

M. F. Agos, and N. A. Muhamad*

Institute of High Voltage & High Current, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia

A086 Impact of Lightning Strike on Photovoltaic System A. Z. Abidin*1, A. H. A. Bakar2, H. Mokhlis1, H. A. Illias1 *1Department of Electrical Engineering, Faculty of

Engineering University of Malaya, 50603 Kuala Lumpur, Malaysia. 2 University of Malaya Power Energy Dedicated Advanced Center (UMPEDAC), Level 4, Wisma R&D University of Malaya, 50603 Kuala Lumpur, Malaysia

A087 Effect of Temperature to Leakage Current of Gapless Metal Oxide Surge Arrester

[ACED 2012 PROGRAMME BOOK] 

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1,2,3Institut Voltan dan Arus Tinggi, Universiti Teknologi

Malaysia, IVAT, Fakulti Kejuruteraan Elektrik, UTM, 81310, Skudai, Johor Bahru, Malaysia.

________________________________________________________________________________________________________________

*W. G. Ariastina, Department of Electrical Engineering, UdayanaUniversity, Kampus Bukit Jimbaran, Bali-80362, Indonesia. Email: w.ariastina@unud.ac.id.

A083

AN EXPERIENCE OF AGEING ON XLPE INSULATION

W. G. Ariastina*

1

, A. I. Weking

1

, I N. S. Kumara

1

, I. A. D. Giriantari

1

, I N. Sugiarta

2

1

Department of Electrical Engineering, Udayana University, Bali-80362, Indonesia

2

PT PLN (Persero) Distribution of Bali, South Bali Network Area, Bali-80113, Indonesia

Keywords: XLPE insulation, ageing, partial discharges

Abstract: A case study of ageing on XLPE conductor

insulation of 20kV primary distribution feeder is presented in this paper. The insulation degradation mainly occurred around conductor tie where the conductor is attached to the post insulator. A section of distribution feeder with defects on the conductor insulation has been examined for this study. Potential losses due to presence of discharges have been investigated by measuring the difference current at locations of the affected conductor. Temperature measurements of the insulation surface have also been carried out. Provisional maintenance procedures were introduced to eliminate the discharges. Measurements of current and surface temperature were repeated nine months after completion of the maintenance work. Results indicated that the discharges have been completely disappeared.

I. INTRODUCTION

Recently, the utilisation of AAAC-S (all aluminium alloy conductor – sheathed) for distribution network has been broadened, particularly in South and East part of Bali. In these parts of the island, most of the distribution networks are supplying consumers at tourism areas near beaches. It is well known that the utilisation of the AAAC-S has a number of advantages compared to that of the bare conductors. The AAAC-S has an ability to protect the distribution network from temporary disturbances which are mainly caused by falling kite and nearby tree contacts. Direct contact of airborne pollutants with the conductor strands may also be avoided.

Nevertheless, after a few years of utilisation, problems began to appear on the insulation of the AAAC-S. It was found that the XLPE sheath degrade rapidly, particularly near the insulator tie. Tiny sparks at the degraded sheath section can be observed clearly at night, indicating the occurrence of discharges. Visual observation of the conductor insulation during day time showed burnt sections around the conductor tie. At some sections, the XLPE sheath has been completely disappeared. This situation obviously requires immediate attention and appropriate maintenance measures.

The occurrence of discharges on the distribution network absolutely causes energy losses. The amount of energy loss very much depends on the characteristics of discharges occurred on the conductor. This paper discusses the potential losses due to degradation of the AAAC-S conductor insulation applied to distribution network. Investigation was carried out on a section of 20kV primary distribution feeder. The section consists of 12 poles at which insulation defects were preliminary identified. Flowing current and surface temperature of the conductor were measured around the conductor tie for each pole. The measurements of current and surface temperature were carried out during dry season to reduce risk of being electrified. A comparison of measurement results before and after planned maintenance operation is also discussed in this paper.

II. MEASUREMENT OF CURRENT AND TEMPERATURE The effects of the insulation defects on potential power losses have been investigated on a series of twelve poles with

impaired conductor sheath. The poles support conductors that are part of a 20kV primary distribution feeder. The feeder lied adjacent to a main road and is approximately 500m from coast line. There are no electrical loads within the twelve poles.

Two medium voltage clamp meters were used to measure potential loss due to the presence of defects. One clamp meter wasplaced before the conductor tie, while the other was placed after the tie, in referred to the current flow. The difference of current measured between the two is considered as the difference current. The difference current indicates potential power losses at the defect location. Measurements of the difference current were carried out for the three phases and for the twelve poles.

Following the identification of the insulation damage, a life maintenance procedure was carried out. This work was aimed to prevent further defect on the conductor strand due to high energy discharges. The work includes tie changed and removal of the affected conductor sheath. Consequently there are some parts of the lines became completely bared at the tie points.

An infrared thermo vision camera was utilised to examine the conductor surface temperature before and after maintenance process. For each location of the degraded insulation, images were taken before and after maintenance works were completed. Results of the two measurements then can be compared and analysed. A reduction of surface temperature is expected when the sparks at the degraded insulation are diminished.

III. RESULTS AND DISCUSSIONS

1. Current Measurement

The current measurement results of the red phase for the twelve poles before maintenance are presented in Figure 1. Bars with darker colour indicate incoming current (I0), while those with lighter colour indicate outgoing current (I1). It is clear that the difference current exists which is indicating the potential power loss at most of damaged insulation sections.

Figure 1. Measured current of red phase

The measured quantity of flowing current on the conductor depends on the load of the remaining part of the feeder at the time of measurement. The magnitude of difference current

128 varies from point to point of measurements, with an average value of 0.108A for the red phase and of 0.117A for the yellow and the blue phases.

Potential power loss at all phases was identified at seven out of twelve explored poles, while potential power loss at only one phase was discovered for one pole. This fact indicates that the insulation damage occurred around conductor tie at all the investigated twelve poles. The results also designate that at 91% of the total number of poles, the insulation ageing involves two or more phases.

Following the identification of defects on the XLPE insulation, immediate life maintenance works were carried out to prevent further defects on the conductor. Measurements of the flowing current were repeated after completion of the maintenance. There was no indication of difference current during the second measurement.

2. Temperature Measurement

As complement of current detection, measurements of surface temperature of the XLPE sheath were also carried out. The temperature of the insulation surface may provide information of existence of discharges. Note that the measured temperature does not indicate the temperature of sparks appeared on some locations of the insulation defects. The indicated values are the average temperature of insulation surface near damaged points. Similar to that of current measurement, the temperature measurement was also carried out before and after the completion of the maintenance works.

The average temperature of the XLPE sheath surface near defect locations (before maintenance) is slightly above 30°C. In contrast, after completion of the maintenance works, the approximate average XLPE sheath surface temperature became 26.5°C. There was a reduction of about 3.5°C in surface temperature of the XLPE sheath after maintenance process was completed.

IV. CONCLUSIONS

Investigation of ageing on XLPE insulation of a 20kV primary distribution feeder has been carried out. Initial measurement results indicated that there are high potential losses due to the presence of discharges. Measurements of the XLPE sheath surface temperature confirmed the situation.

It is not clear however; whether the fast ageing process of the XLPE insulation was caused by production imperfection of the conductor or due to improper installation and application of the conductor. The fact that most discharges that promote ageing on the XLPE sheath were located on the conductor tie exhibit that advanced explorations are required. Further investigation has been planned to look at this issue in the future.

REFERENCES

[1] PT. PLN (Persero), “PLN Standard 41-8-1981: All Aluminium Alloy

Conductor” (in Indonesian).

[2] PT. PLN (Persero), “PLN Standard 41-10-1991: All Aluminium

Alloy Conductor-Sheathed” (in Indonesian).

[3] PT. PLN (Persero), “PLN Standard 3λ-1-1λ81μ Power Cable Tests”

(in Indonesian).

[4] I N Sugiarta, “A Study of Partial Discharge Phenomena on AAAC-S

Conductor Ties in East Bali 20kV Distribution Network”, Udayana

University, 2011 (in Indonesian).

[5] A. Garton, S. Bamji, A. Bulinski and J. Densley, “Oxidation and

Water Tree Formation in Service-Aged XLPE Cable Insulation”, IEEE Trans. Electr. Insul., Vol. EI-22, No. 4, pp. 405-412, 1987.

[6] J. L. Parpal, J. P. Crine and C. Dang, “Electrical Aging of Extruded Dielectric Cablesμ A Physical Model”, IEEE Trans. Dielectr. Electr.

Insul., Vol. 4, No. 2, pp. 197-209, 1997.

[7] G. C. Montanari, C. Laurent, G. Teyssedre, A. Campus and U. H.

Nilsson, “From LDPE to XLPEμ Investigating the Change of

Electrical Properties. Part I: Space Charge, Conduction and

Lifetime”, IEEE Trans. Dielectr. Electr. Insul., Vol. 12, No. 3, pp. 438-446, 2005.

[8] E. S. Cooper, L. A. Dissado and J. C. Fothergill, “Application of

Thermoelectric Aging Models to Polymeric Insulation in Cable Geometry”, IEEE Trans. Dielectr. Electr. Insul., Vol. 12, No. 1, pp. 1-10, Feb. 2005.

[λ] M. S. Mashikian and A. Szatkowski, “Medium Voltage Cable

Defects Revealed by Off-Line Partial Discharge Testing at Power

Frequency”, IEEE Electr. Insul. Mag, Vol. 22, No. 4, pp. 24-32, 2006.

[10] G. C. Montanari, A. Cavallini, F. Puletti, “A New Approach to

Partial Discharge Testing of HV Cable Systems”, IEEE Electr.

Insul. Mag,Vol. 22, No. 1, pp. 14-23, 2006.

[11] W. Li at. al., “Frequency Dependence of Breakdown Performance of XLPE with Different Artificial Defects”, IEEE Trans. Dielectr. Electr. Insul., Vol. 19, No. 4, pp. 1351-1359, 2012.