TECHNICAL EXCHANGES AND

1999 Asian Conference on Electrical Insulation Diagnosis was held on 18 - 23 November 1999 at the Research Park of Chungbuk National University, Cheongju, Korea. It was organized by the Korean Institute of Electrical and Electronic Material Engineers(KIEEME) and Chungbuk National University and co-sponsored by the Electrical Materials Society of the Korean Institute of Electrical Engineers(KIEE) and KOSEF.

The 1999 ACEID was planned to provide opportunities for the scientists, researchers, and engineers to present and to discuss on the latest research results in the field of electrical insulation diagnosis in power apparatus on 18-19 November 1999. More than 15 persons visited the Korea Electric Power Research Institute(KEPRI), 765kV Test Yard, Kwangyang Steel Co., and the Korea Electrotechnology Research Institute(KERI) during 20-23 November as technical tour. The conference are originated from China-Japan Joint Conference on Electrical Insulation Diagnosis held at Xi'an, China on April 1990.

The three papers were invited and 96 papers from four countries (Japan, China, German, and Korea) were accepted among 115 abstracts submitted to the program committee, and presented in seven oral sessions and two poster sessions covering the topics of High Field Effects in Solid and Liquid Dielectrics, Aging, Pre-breakdown and Breakdown Phenomena, Advanced Diagnostic Techniques, Prediction Methods of Residual Lifetime, and New Technology for Electrical Insulation. At the conference, panel discussion on the topic of Problems on PD Measurements and Interpretation in Power Apparatus was specially programmed.

During the conference, International Advisory Committee of ACEID ’99 discussed on the next ACEID and was entered into an agreement to fulfill the following clauses by three representatives ( Prof. Z. Yan, Prof. K. Matsuura, and Prof. Joon-Ung Lee);

The Conference will be held periodically in every 2 years: 2001 in Japan, 2003 in China, and 2005 in Korea.

The host nation has authority to set up all the conference schedule including the exact location and the term for the Conference.

By Prof. Kee-Joe Lim

(Chungbuk National University, Korea, E-mail: kjlim@trut.chungbuk.ac.kr )

Announcement of International Conference to be Held in Asia

Second Asia-Pacific International Symposium on the Basic and Application of Plasma Technologies (APSPT)

APSPT devoted to basic and application of plasma technologies will be held April 18-20, 2001 in Kaohsiung, Taiwan, Republic of China. The symposium will be focused on the applications in the field of material processing and environmental treatments. Presentation emphasizing either the basic research or applied topics will be welcomed. Topics of interest will include, but not be limited to the following: Material dry processing, Pollution control technologies, Waste destruction and treatments, Miscellaneous (Plasma general)

Important Date: Abstract (up to 200 words) due: Oct. 30, 2000

Acceptance Letter Nov.15, 2000

Pre Registration Due: Dec.15, 2000

Camera Ready Full Text (4-6 pages) due: Dec.15, 2000

Symposium: April 18-20, 2001

Secretary: Professor S. Ono

Department of Electrical and Electronics, Engineering

Musashi Institute of Technology, Tokyo, Japan

Fax:+81-3-5707-2213

e-mail:ono@ee.musashi-tech.ac.jp

International Conference on Electrical Engineering 2001 (ICEE 2001)

ICEE 2001 will be held in Xian, China on July 22-26, 2001(to be expected). Topics cover wide areas of Electrical Engineering field.

Important Date: Submission of abstract : Jan. 31, 2001

Notification of Acceptance: March 15, 2001

Submission of full papers: May 1, 2001

ICEE 2001 July 22-26, 2001 (to be expected)

Organized by: The Chinese Society for Electrical Engineering (CSEE)

Co-organized by: The Hongkong Institute of Engineers (HKIE)

The Institute of Electrical Engineers of Japan (IEEJ)

The Korean Institute of Electrical Engineers (KIEE)

The 1st International Discussion Conference on Nano Interface Controlled Electronic Devices ( IDC-NICE2001 )

The IDC-NICE Devices conference will be held at Kyongju Hilton Hotel in Kyongju(慶州), Korea, July 16-20, 2001.

Scope and Topics are Molecular Electronics & Devices, Nano Electronics & Devices, Nano Fabrication & Materials, Spectroscopy, Ultra-thin Films and Novel Systems, Nanotechnology.

The scientific program will consist of invited lectures, and oral presentations. The official language : English.

Important Date: Deadline for subscription: June 1, 2001

Deadline for abstracts: June 1, 2001

Submission of proceedings: July 1, 2001

IDC-NICE July 16-20, 2001

Organizing Committee: Prof. Young-Soo Kwon (Chairman, Dong-A University, Korea)

Prof. Mitsumasa Iwamoto (Co-Chairman, Tokyo Institute Technology, Japan)

Sponsored by Center for Integrated Intelligent Port Management Systems (CIIPMS), Dong-A University

Foundation of Pusan Techno-Park, Korea

The Society of Nice Devices of Japan

Supported by The 21st Century Frontier of Korea

R & D for Nano Device of Korea

In cooperation with Technical Committee on Dielectric and Electrical Insulation Materials, IEEJ

Technical Committee of Electrical Materials in KIEE, Korea

Division of Molecular Electronics & Devices (ME&D), Korea

Further information: The web site is www.donga.ac.kr/~nano/nice2001

Dr. Hoon-Kyu Shin, IDCNICE2001 Secretariat

Center for Integrated Intelligent Port Management Systems, Don-A University

840, Hadan-2dong, Saha-gu, Pusan 604-714, Korea

Phone: +82-51-200-6742, Fax:+82-51-200-5550

E-mail:nano@mail.donga.ac.kr

2001 International Symposium on Electrical Insulating Materials (ISEIM 2001) and 2001 Asian Conference on Electrical Insulation Diagnosis (ACEID 2001)

ISEIM 2001 and ACEID 2001 will be held at Hotel Sungarden in Himeji, Japan on November 19-22, 2001.

Main topics are 1. Conduction and Breakdown in Dielectrics, 2. Space Charge, Surface and Interfacial Phenomena, 3. Electrical Insulation for Apparatus and Cables, 4. Aging and Degradation, their Detection and Monitoring, 5. Test and Measurement Techniques, 6. Insulation Design and Reliability, 7. Eco-friendly Dielectric Materials for Electronics, 9. New and Functional Dielectric Materials, 10. Dielectric Phenomena and Tthier Applications.

Important Date: Submission of abstract : March 20, 2001

Submission of manuscript: July 31, 2001

Conference: November 19-22, 2001

Sponsored by: IEEJ Technical Committee on Dielectrics and Electrical Insulation

IEEE Dielectrics and Electrical Insulation Society

In Cooperation with: The Korean Institute of Electrical and Electronic Material Engineers

Chinese Electrotechnical Society

Kansai Section of IEEJ

IEEJ Investigation Committee on Insulation Lifetime of Dielectric Materials and Electrical Apparatus

Himeji Institute of Technology

More information about ISEIM 2001 is available at the following web site:

http://www.waseda.ac.jp/conference/ISEIM2001/index.html

7th IEEE International Conference on Properties and Applications of Dielectric Materials (ICPADM 2003)

ICPADM-2003 will be held in Nagoya, Japan, in June 2-5, 2003. This conference is sponsored by the IEEE Dielectrics and Electrical Insulation Society (DEIS) and it will be cosponsored by the IEE Japan.

The details will be in the Call for Papers which will be distributed later.

Contact person: Prof. T. Mizutani

Dept. of Electrical Eng., Nagoya University, Nagoya, Japan

Fax : +81-52-789-4441

e-mail : t.mizutani@ieee.org

Smart Measurement and Diagnostic Technology (SMDT) Lab in Hanyang University

Prof. Ja-Yoon Koo

Hanyang University, KOREA

About SMDT Lab

The Smart Measurement and Diagnostic Technology Lab.(SMDT) is an leading laboratory in Korea for the study of not only the diagnosis of power apparatus but also the insulation techniques. Main research areas include diagnostic technology for the insulation system and life estimation techniques for the power apparatus including their accessories. The SMDT is also associated with the Research Center for Electronic Materials and Components(EM&C, designated by government), Hanyang University, Korea.

Our main research activities are :

· After-laying test for underground power cable system

· Insulation degradation diagnosis and fault location of the underground power cable system

· Optical measuring system for the variation of the electric field

· Partial discharge measurement techniques and it's pattern analysis

Summary of Recent Achievements

1. A suggestion on the PD pattern analysis (published at ICPADM 2000)

The correlation between the PD patterns and the electrical tree propagation has been investigated by use of the specimen removed from the insulation of the real 154㎸ XLPE underground power cables. Considering the results of our investigation, if the PD magnitude is only considered for the diagnosis of the cable system, it is possible to draw a wrong decision. Therefore, it is possible to propose that the evolution of PD pattern as a function of time should be taken into account for the diagnosis of the power cable system in addition to the conventional φ-q-n method.

2. Development of an EMI free optical prototype electric field measuring system applicable for the diagnosis of high power apparatus (to be presented at CEIDP 2000)

New PD detection technique using Pockels cell was proposed and considerable apparent chaotic characteristics were discussed. The presence of chaos of the PD signals has been investigated by examining their means of qualitative and quantitative information. The presence of strange attractor, indicates the existence of fractal structures in it's phase space. Furthermore, several dimension values of strange attractor were verified sequentially.

3. Development of the Compact After LayingTest Set using oscillating wave voltage underground distribution for Power Cables (published at CEIDP97)

In order to suggest the optimum after laying test method, defect detection capabilities of various test methods were experimentally investigated. Based on our results, it is pointed out that with-cable-charging OW voltage test, of which test condition replacing the AC voltage test is 55kV/50shots, is the most optimum alternative method applicable to the underground distribution power cable system in Korea.

SMDT Head : Prof. Ja-Yoon Koo

· Received BS form Seoul National University, Korea (1975), MS from ENSEIHT, and Ph. D.

· Joined Research Center of the Electricity of France at Renardiere in France and then worked for the Korea Advanced Institute of Science and Technology

· Professor at the Dept. of Electrical Engineering, Hanyang University, Korea since 1988

· Regular member of SC-21 of CIGRE representing KOREA and Technical Committee member for the JICABLE (1988-1999)

· Regular member of SC-15 of CIGRE since 2000

· Director of Research Center for Electronic Materials and Components (EM&C, designated by government), Hanyang University, Korea since 1996

Contact to :

Address: SMDT Lab., Dept. of Electronic and Computer science, Hanyang University

Sa 1-dong, Ansanshi, Kyunggido, 425-791, KOREA

Tel : +82-31-400-5163 Fax : +82-31-407-9873

URL : http://emc.hanyang.ac.kr/hv_lab

E-mail : koojy@email.hanyang.ac.kr

The electric power industry in China has already stepped into an era characterized by large power unit, huge power grid and high voltage. Under this background, State Key Laboratory of Electrical Insulation for Power Equipment (SKLEI) was established in 1991, and approved by the State Council. SKLEI, being located in Xi’an Jiaotong university, is the unique state laboratory undertaking research on power equipment in China.

The research direction of SKLEI is decided by its academic board, whose members are from famous universities, research institutes, electric power companies and power equipment manufactures. Its academic board members, such as GAO Jingde, ZHENG Jianchao, WANG Gen and Teruyoshi Mizutani, are prestigious in the field of electrical engineering. GAO is member of the Chinese Academy of Sciences, and ZHENG and WANG are members of the Chinese Academy of Engineering. Professor XIE Hengkun was appointed to the position of director for the SKLEI. More than 70 staffs, including 19 professors, and more than 60 graduates and doctoral students, work in this laboratory. It should be pointed out that new generation of young scientists are very active and play a important role in research works. The research fields of SKLEI are covering dielectric theories, high voltage engineering, electrical insulation techniques, electrical insulating and functional materials, and electrical engineering information techniques. Recently the investigation has focused mainly on the following subjects:

1. Electrical insulation measuring and on-line monitoring techniques, and insulation diagnosis for power equipments.

2. Dielectric theories and the techniques to enhance the breakdown strength of electrical insulating system.

3. Research and development of new electrical insulating and functional materials.

4. Characteristics of gaseous insulation, in particular SF₆ and its mixture gases, and electric arc theory.

5. New techniques for power equipments.

With the raise of voltage grade and the application of large capacity power equipments, the reliability in service, mostly depending on the insulation system, becomes greatly important. SKLEI pay more attention to on-line monitoring and insulation diagnosis techniques for power equipments. A number of new detecting technique, such as ultra-wideband partial discharge detecting technique, ultrasonic system for detecting the microscopic defects in insulation, ultrasonic flow-meter for measuring the flow of circulatory cooling water in turbine generator, and several kinds of on-line partial discharge monitors and dielectric parameter detectors for different power equipment such as generator, transformer, cable and ZnO arrester have been developed. In SKLEI multi-stresses aging test bases were set up, with which the aging investigations of generator winding insulation and transformer insulation have been performed under single stress or multi-stresses such as electric, mechanical and thermal stresses simultaneously. On the basis of aging experimental results, a certain of new characteristic parameters representing the aged state of insulation were found, which have been employed for insulation diagnosis and residual lifetime estimation of power equipments. These research items are the key projects supported by National Natural Science Foundation and National Power Foundation.

So far the highest voltage of transmission in China is 500kV. In order to meet the requirements of rapid development of electric power industry, even higher voltage for transmission, for example 750kV in Northwest and 1000kV in other area, is going under planning and construction in China. SKLEI is making efforts to investigate the insulation theories of power equipments with even higher voltage grade, involving discharge characteristics of outdoor insulation, unusual discharge phenomena, optimal insulation design, and electric-magnetic effects, etc. Some of the preliminary studies for even higher voltage grade of electric power transmission are being undertaken in cooperation with relative research institutes. SKLEI has investigated the corona suppression technique and theory for the insulation systems of even higher voltage grade for many years, and made considerable headway.

The interest in SF₆ gas mixtures has been re-ignited in recent years by the issue of the greenhouse effect of the SF₆ gas. The research activity in SKLEI is now focused on SF₆/N₂ and SF₆/CO₂ gas mixtures, which is suitable for application in electrical apparatus with slightly non-uniform fields. The application of SF₆/N₂ and SF₆/CO₂ to transformer, where both highly non-uniform field problems and partial discharge in gas/film insulation are inevitable, is also investigated.

Most of research activities on dielectric theory were concerned with treeing and space charge effects. With extensive international cooperation, the installations for measuring the space charge in solid or liquid dielectrics were set up, by using which a number of space charge effects in insulating system have been investigated in SKLEI. Also, the electric treeing phenomena was one of the important projects in this laboratory. According to the experimental results and theoretical analyses, the researchers of SKLEI put forward a low density region theory for the pre-breakdown of solid dielectrics, and proposed a series of approaches to treeing suppression and breakdown strength enhancement for XLPE cable insulation. Combining space charge effect with dielectric properties, interfacial effects in filled and reinforced polymeric composites have been studied in SKLEI, and a model for the dynamic process of interfacial space charge accumulation is put forward.

The functional materials and new insulating materials are of vital importance for developing high and new techniques. A part of researchers are engaged in the investigations on high permittivity-high voltage ceramic capacitors, linear and nonlinear ZnO resitors, power electronic device insulation, and insulation for unusual and extreme environment. These researchers developed a number of new products such as ceramic capacitors for the uniform of voltage distribution in high voltage circuit-breaker and arrester, different types of ZnO resister for power apparatus and electronics, self-regulating heating cable, fire-retardant cable insulation, etc, which are employed yet extensively in China.

Owing to the concerted efforts of staffs, SKLEI has received many awards such as national natural science awards, national science and technique progress awards and national invention awards.

SKLEI has persistently been attaching importance to international academic exchanges. In recent years, it has sponsored several international conferences including ICPADM (International Conference on Properties and Applications of Dielectric Materials),

I am very glad to receive the E-mail from Professor Tatsuo Takada asking me to submit a manuscript to the 7th EINA for introducing the research activities on high voltage and insulation technology in Tsinghua University. It is a good opportunity for our research institute to make close links and active cooperation with other research institutes in Asia.

It is necessary to establish Future Communication Network for High Voltage, Electrical Insulation and Dielectrics in Asia based on world wide web site for scientists and engineers among Asia countries to exchange the latest information. Our research institute would like to joint the network actively.

High voltage and insulation technology research institute is one of six research institutes in the Department of electrical engineering and applied electronic technology of Tsinghua University. The other five research institutes are:

Power Systems and its Automation

Electrical Machines and its Control

Power Electronic Techniques

Theoretical Electrotechnics

Biomedical Engineering and Instruments.

In the high voltage and insulation technology research institute there are 9 full professors, 8 associate professors, 7 lectures, 3 assistant teaches 3 technicians and 5 postdoctor research fellows. In 1999 in the high voltage and insulation research institute there are 24 doctor candidates, 67 master degree candidates and 18 part time master degree candidates. Each year 30 undergraduate students choice this research institute to do research projects for graduate theses.

In this research institute there are 6 research groups. The name and research direction of each group is as follows:

1. Gas Discharge, Plasma and High power Pulsed Technology

Low temperature plasma

High power pulse technology

High temperature plasma and Z-pinch

Techniques and applications of photoelectronics

2. High Voltage Insulation and Composite Insulator

Discharge along polluted insulator

Composite insulators

Compact EHV transmission lines

Contaminated outdoor insulation in high altitude area

Application of discharge in environment engineering and biology technology

3. Insulation Detection and Diagnosis

Digital monitoring system for on-line partial discharge detection of power apparatus

Acoustic measuring system for partial discharge detection of power apparatus

Optical measuring technology for pressure and temperature of power apparatus

Signal processing methods applied to the measurements of partial discharge in power apparatus

4. High Voltage Measurement and Test

Dynamic performance of digital measuring system for high voltage transient signal acquisition

Impulse waveform recording and data processing system

Standard voltage divider for high voltage impulse measurement

Study on ozone generator and its application

5. Overvoltage in Power System and Insulation Coordination

Insulation coordination of gas insulated substations

Insulation coordination of ultra-high voltage systems and optimal design of transmission lines

Corona modeling for the calculation of transients on transmission lines

Study on substation grounding system

Lightning overvoltage protection

6. High Voltage Apparatus and Condition Monitoring

Inner fault detection of gas insulated switchgear

Mechano-electronic integrative detecting and diagnosing techniques for high voltage switchgear

DC and AC arc interruption

Study on switching characteristics of large capacity GTO

In 1999 there are 45 research projects are being studied and 98 papers are published in our research institute. We have received several research awards from central government. Now some international cooperation projects are being studied with overseas universities and companies. Welcome professors, scientists and enginners from foreign countries to visit our research institute to make close links and collaboration.

Guan Zhicheng

· Professor of high voltage and insulation technology research institute

· Chairman of Academic committee for Department of Electrical Engineering
and Applied Electronic technology

· Vice President of Tsinghua University Council

· Vice President of Chinese Society for Electrical Engineering

· Vice President of China Electrotechnical Society

Tel: +86-10-62771683

Fax: +86-10-62770349

E-mail: guanzc@tsinghua.edu.cn

Staying in China had been my dream for a long time since I first time visited this country ten years ago. The dream has come true when Prof. Hengkun Xie kindly invited me as a visiting scholar at State Key Laboratory of Electrical Insulation Power Equipment in Xi'an Jiaotong University. I stayed there during this August and worked for partial discharge measurement of generator coils and simulation of partial discharge pattern considering discharge time-lag. Some of the achievement will be published soon.

This university, where two ICPADM meetings were held, is well known as one of the most advanced university in China on insulation field. Researches are carried out on "breakdown strength and discharge", "dielectric properties, measurement and insulation diagnostics", "insulating and functional materials" and "gaseous insulation". Most advanced facilities in the world are available at this lab. Around the campus was flooded with electronics and software shops so that students could purchase whatever component they want. Students I worked with worked very hard from early morning to late at night. It was impressive that they were so enthusiastic to learn something from me. We often talked for a long time on measurement technique and analysis.

Although Xi'an is one of the major positions for the development of west China, there are very new and very old things at the same time. This circumstance was close to my hometown Kyoto, so I was very happy to go downtown by bicycle to enjoy both shopping for software and visiting historical places.

Chinese people were open minded and very friendly to me. It looked that they were proud of Chinese history and culture. I studied a lot about China when taking a rest at the lab. They like to teach something. In addition, I had a chance to take a lesson on Chinese language every day. Being able to speak some Chinese language is good for enjoying the life outside the campus. Some people became so friendly when they had known that I made a big effort in learning their language. Prof. Xie says he welcomes outstanding researchers from outside China. I strongly recommend young researchers to stay there and exchange technical information and friendship as well. You sure will be fun of China and Chinese people.

Summary of Recent Achievements

The Research on High Voltage and Insulation Technology in Tsinghua University