Interface charges between insulating materials

Multi-layer insulations are commonly used in HVDC applications, giving rise to physical and chemical interfaces in the insulation systems. Space charges at the interface between insulators play crucial roles on the electric field distribution of such insulation systems. The issue arises in the desig...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2017, Vol.24 (4), p.2633-2642
Main Authors: Wu, Kai, Cheng, Chuanhui
Format: Article
Language:English
Subjects:
Acoustic waves
Charge distribution
Charge simulation
Computer simulation
Dielectrics
Direct current
Electric fields
Electric power distribution
Electrodes
Insulation
Insulators
interface potential barrier
interface traps
interfaces
Measurement techniques
multi-layer dielectrics
MWS polarization
Oils
Space charge
Space charges
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Summary:Multi-layer insulations are commonly used in HVDC applications, giving rise to physical and chemical interfaces in the insulation systems. Space charges at the interface between insulators play crucial roles on the electric field distribution of such insulation systems. The issue arises in the design of high voltage direct current (HVDC) insulations. How to understand the behaviors, mechanisms and effects of interface charges on the electric field distribution? In the past two decades, this specific topic has attracted much interest. Much experimental evidence has shown that interface charges may not follow the classic Maxwell-Wagner-Sillar (MWS) theory. In this paper, the measurement techniques and the phenomena of space charge behaviors at the interfaces between different insulating materials are summarized. It is indicated that surface states should be included in the numerical simulation of the charge and field distributions.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2017.006442