May 25, 2021 at 2 pm，from the Graduate School of Shandong University、Hosted by the Graduate Work Department of the Party Committee，The 55th Issue (Total 1044), hosted by the School of Electrical Engineering, was held in the lecture hall on the fourth floor of the Electric Power Building of Qianfoshan Campus。This forum invited Professor Yin Yi, deputy dean of the School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University，The theme of the lecture is "Activity of Solid Medicine Charging Transport、Simulation and Engineering Application "。This forum is chaired by Professor Li Qingquan。

The lecture begins,Yin YiThe research significance of the professor's transportation around solid medium charges、Experimental representation technology of solid media charge transportation、Numerical simulation of solid media charge transportation、Engineering applications for solid media charge transportation and current problems and outlook five aspects，systematically introduced the research results of their team。Yin YiProfessor first pass the diversification of voltage waveforms faced by electrical equipment、The workplace is stronger、The test and challenges of the local electric field concentration are obvious and the challenges lead to the necessity of studying the problem of solid insulation under high field，There are also a large number of solid medium in the widely used power electronic devices，and the abnormalities of solid media charges under the high field，Determined the study of solid media charge transportation is significant。Then，Yin YiProfessor introduced several representation techniques of space charges，is a combination with the conductivity、Periodic electric field and full -size cable，and introduced their respective characteristics，Another，Yin YiProfessor also introduced the traditional method of experiments and the characteristic method of the strength of the solid medium buried solid media dielectric，and the relationship between the consistency resistance of the power -resistant branches of the solid medium、Temperature and Electric Farm's Nature of the Solid Medicine Farm strong conductivity。Then，Yin YiProfessor special problems for modeling modeling through high field charge—— The difficulty lies in the physical process under the "high field" tells the meaning and application of simulation，and introduce it in detailS Le RoyThe traditional bipolar carrier model proposed by the research team，and the physical processes and simulation and two -dimensional structural dissection algorithms of the charge -modeling of high -field modeling。Then，Yin YiProfessor introduced the engineering application of solid media charge transportation for example，One is DC pre -pressure short -circuit short -circuit electro -branch behavior simulation，It is impossible to explain quantitatively because of experimental phenomena，The other is a high -voltage electric electronic module packaging insulated space charge dynamic simulation，It cannot be measured directly because of small scale，Another is the space charging under the intersection of oil paper insulation。Last，Yin YiProfessor mentioned，The current solid medium charges in the study，Get the simulation parameter、The improvement of the physical process and the simulation of long -term dielectric behaviors still need to be improved。

Question link，Classmates and teachers on the scene ask questions about different questions，Different electrode models such as needle board、Production problems in needle balls，improvement methods for breakdown experiments, etc.，Yin YiProfessor explains one by one，Professor Li Qingquan also put forward his own opinions on the content of the lecture。This issue"His Majesty" Graduate Academic Forum ended successfully in the warm applause of teachers and students。

Introduction to the speaker:

Yin Yi, male,Born in October 1972，Jiangsu Golden Altar。Professor，Doctoral supervisor，Deputy Dean of the School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University。Main research areas include: (1) Classic physical theory and engineering application of polymooth nano -composite media; (2) Ultra -high -voltage flexible DC cable key technology and engineering application; And space charging signs; (4) Evaluation technology of electric equipment insulation status based on the theory of relaxation theory and multi -technical association analysis。As a person in charge，Undertaking key projects of the National Natural Science Foundation of China、Basic special special、National 863 project and national key R & D projects。Published more than 150 papers at domestic and foreign academic journals and conferences。