The impact of particle contamination on Functionally Graded Material based Spacer for GIS applications

Abstract

Electrical substations must operate safely, effectively, and promptly following damage. Recent problems with the insulator surface of GIB, including
delamination and protrusion, have resulted in de-energization of the device and substantial financial losses. A three-phase GIB exhibiting delamination, voids,
protrusions, depressions, and particle contamination is built utilizing a delta-type Functionally Graded Material (FGM) spacer to facilitate the examination of
electric field stress at the Triple Junction. Metal inserts placed at the enclosure's terminus mitigate electrical stress. Distributed FGM, infused with varying
permittivity values and diverse filler materials, yields a uniform electrical field stress. Variations in GIB and FGM voltage ratings are utilized in the simulation.
The incorporation of the metal insert into the FGM insulator significantly mitigates the impact of grading on electric field stress, as previously established.