NDLI: Simulation research on surface charging phenomena across solid dielectrics prior to flashover in vacuum

Content Provider	IEEE Xplore Digital Library
Author	Yan Lang Guan-Jun Zhang Ai-Xuan Zhao Guo-Qiang Su Bai-Peng Song
Copyright Year	2014
Description	Author affiliation: State Key Lab. of Electr. Insulation & Power Equip., Xi'an Jiaotong Univ., Xi'an, China (Yan Lang; Guan-Jun Zhang; Ai-Xuan Zhao; Guo-Qiang Su; Bai-Peng Song)
Abstract	Prior to flasshover across solid dielectrics under steady-state high voltage excitation in vacuum, there are charging phenomena occurring on insulator surface, which significantly affect the developing process of flashover. In this paper, based on the secondary electron emission avalanche model (SEEA) and Monte Carlo simulation method, the theoretical analysis of surface charge density on insulation surface is made. A two-dimensional Mont Carlo simulation on surface charge accumulation under DC voltage excitation is provided. The results reveal that surface charging process can be divided into three stages including initial accumulation, fast multiplication and final stable stage. The positive charges exist in a small surface region near the cathode. While the flashover process develops, positive charges accumulate near the anode and the amount of positive charges is an order of magnitude larger than before. With flashover process developing, the peaks of positive charges move toward cathode. In the final stage, the SSEE phenomena are achieved and surface charges are invariable and reach up to a stable distribution.
Sponsorship	Plansee
Starting Page	69
Ending Page	72
File Size	651682
Page Count	4
File Format	PDF
ISBN	9781479967506
e-ISBN	9781479967520
DOI	10.1109/DEIV.2014.6961621
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-28
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface charging Surface treatment Flashover Electron emission Insulators Electrodes Electric fields
Content Type	Text
Resource Type	Article

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