Title :
A novel nonlinear coating for suppression of metallic particle motion in GIS
Author :
Zhang, X.Q. ; Nojima, K. ; Andoh, H. ; Takei, M. ; Boggs, S.
Author_Institution :
R&D Center, Toshiba Corp., Kawasaki, Japan
Abstract :
To satisfy the increased need to suppress metallic particle motion in compact Gas-Insulated-Switchgear (GIS), a novel coating with nonlinear resistivity was developed. The current density as a function of electric field (J-E) and dielectric constant of the nonlinear coating were evaluated. Electrical field analysis using the measured J-E data indicates that the nonlinear coating can reduce the field enhancement between metallic particles and the coating sufficiently to suppress particle motion compared to a dielectric coating. Experiments in a coaxial GIS bus duct geometry indicate that the nonlinear coating increases the lift-off electric field of metallic particles on the internal surface of GIS enclosure with reduced statistical dispersion in the lift-off field relative to a dielectric coating.
Keywords :
current density; finite element analysis; gas insulated switchgear; permittivity; FEM electric field analysis; GIS enclosure internal surface; J-E data; coaxial GIS bus duct geometry; current density; dielectric coating; dielectric constant function; electric field function; electrical field analysis; field enhancement; gas-insulated-switchgear; metallic particle lift-off electric field; metallic particle motion suppression; nonlinear coating; nonlinear resistivity; statistical dispersion; Dielectric constant; Electric fields; Electrodes; Gas insulation; Powders; GIS; coating; lift-off; metallic particle; nonlinear resistivity;
Conference_Titel :
Transmission and Distribution Conference and Exposition (T&D), 2012 IEEE PES
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-1934-8
Electronic_ISBN :
2160-8555
DOI :
10.1109/TDC.2012.6281465