Electric Charge Accumulation in Dielectrics: Measurement and Analysis

Classification of charge accumulation measurement.- Fundamentals of Q(t) measurement.- Evaluation of charge accumulation.- Q(t) data of various polymer materials.- Charge accumulation in inorganic materials.- Application to insulation diagnosis.- DC Insulation and space charge accumulation.- PEA method: pulsed electro-acoustic method.- Generation of pulse pressure wave.- Basics of electrodynamics and elastic mechanics.- Examples of PEA measurement results.- Basics of Quantum Chemical Calculation.- Application examples of Quantum Chemical Calculation.- Analysis examples by Quantum Chemical Calculation.

Tatsuo Takada was born in Yamanashi, Japan, in August 8th 1939. He received the B.E. degree in electrical engineering from Musashi Institute of Technology, Japan, in 1963 and the M.E. and Ph.D. degrees from Tohoku University, Japan in 1966 and 1975, respectively. He became a Lecturer, an Associate Professor and a Professor at Musashi Institute of Technology, in 1967, 1974 and 1987, respectively. He was a Visiting Scientist at MIT (USA) from 1981 to 1983 and he is a consulting professor of Xian Jiaotong University, China, 1995. He has now undertaken several research projects on the development of acoustic and optical advanced methods for measuring electric charge distribution in dielectrics. For example, in order to investigate the space charge effect in solid dielectric material, the dynamic surface charge distribution on solid dielectric materials and the electric field vector distribution in liquid insulating materials. He received the progress award from the IEE of Japan in 1996. He has also received Whitehead Memorial Award in 1999 by his pioneering work on PEA, and gave an Award Lecture in IEEE CEIDP (Conference on Electrical Insulation and Dielectric Phenomena). He further received Chen Jidan Award for his contributed works in charge measurement and quantum chemical calculation and gave a plenary speech in IEEE ICEMPE (International Conference on Electrical Materials and Power Equipment). He is a Life Fellow member of IEEE. He can be reached by email at takada@a03.itscom.net.

Hanwen Ren was born in Shanxi, China in 1994. He received his B.Sc. and Ph.D. degree in electrical engineering from North China Electric Power University, China in 2016 and 2021. Currently he is a lecturer and post-doctor in North China Electric Power University. He has published over 30 academic papers in journals and international conferences. Now he is mainly researching in the field of the space charge inside solid insulation and its measurement technology. He can be reached by