摘要
As a non-destructive local gas breakdown phenomenon within a surface or bulk cavity surrounded by insulation,partial discharge(PD)contains important information which can be used to evaluate and diagnose electrical insulation systems.In this paper,distinctive characteristics of PD for DC versus AC are reviewed.A summary of experimental studies on DC PD in different insulation coordinations is presented,including PD in gaseous insulating media,PD in solid insulating media and PD in liquid insulating media.Conclusions and some thoughts based on existing studies are provided,and challenges and suggestions for future studies are given.This paper can serve as a guide reference for readers to learn the background and state-of-the-art of DC PD studies.More importantly,it is hopeful that this study can inspire novel ideas for further advancing fundamental research of DC PD mechanisms and PD mitigation methods.
作者简介
Tohid Shahsavarian received the B.Sc.degree of Electrical Engineering from the University of Tabriz in 2011,and the M.Sc.degree from University of Science and Technology in 2013.Then,he worked in the Department of Transmission and Distribution in Monenco Iran Consulting Engineers Company.He is currently working toward the Ph.D.degree in Electrical Engineering in University of Connecticut,and his research interests include partial discharge analysis and risk assessment of AC and DC power cables,Reliability analysis of HVDC grids,geomagnetic disturbances;Mohamadreza Arab Baferani received the BS.c.degree of Electrical Engineering from the Iran University of Science and Technology,Iran and MSc from University of Tehran,Iran.Currently,he is a Ph.D.student of electrical engineering and research assistantship in University of Connecticut.His main research interests are high voltage engineering and HVDC cable systems;Kerry Davis received the Chemical Engineering B.S.degree from the University of Connecticut in 2016.During her undergraduate time at UConn,she was a Presidential Scholar and performed undergraduate research under Dr.Barry Carter.She has worked at Pratt&Whitney(P&W)since 2016,interning at Collins Aerospace prior.She holds 1 US patent todate.While working at P&W,she has been pursuing her Ph.D.in Material Science and Engineering at the University of Connecticut.Her research interests include determining and characterizing material solutions for hybrid-electric aerospace systems;corresponding author:Yang Cao was graduated with B.S.and M.S.in Physics from Tongji University in Shanghai,China,and received his Ph.D.from the University of Connecticut in 2002,after which he served as a senior electrical engineer at GE Global Research Center until 2013.He is currently a full professor at the Electrical and Computer Engineering Department of the University of Connecticut.Dr.Cao is also the Director of the Electrical Insulation Research Center,Institute of Materials Science and the Site Director of the NSF iUCRC Center on High Voltage/Temperature Materials&Structures.His research interests are in the physics of materials under extremely high field and the development of new dielectric materials,particularly the polymeric nanostructured materials,for energy efficient power conversion and renewables integrations,as well as for novel medical diagnostic imaging devices.e-mail:yang.cao@uconn.edu;Di Zhang(S’09–M’10–SM’17)received the B.S.and M.S.degrees from Tsinghua University,Beijing,China,in 2004 and 2006,and the Ph.D.degree from Virginia Tech,Blacksburg,VA,USA,in 2010,both in Electrical Engineering.He is currently an associate professor in Naval Postgradate School since 2019.Before that,he has been working with GE Global Research Center,NY,USA,as a Senior Electrical Engineer for 10 years.He has published more than 17 referred journal pulications and more than 30 IEEE conference publications.He also holds 35 granted US patents.His research interests include modeling and design of medium to high voltage power converters,SiC-based high-performance power conversion,and power conversion system for grid,renewable,and aviation.
