Insulation Performance and Simulation Analysis of SiO2-Aramid Paper under High-Voltage Bushing

Abstract

The long-term safe and stable operation of oil-impregnated paper (OIP) bushings is of great significance to the operation of power systems. With the growth of OIP bushing, its internal insulation will gradually decay. Aramid insulation paper has excellent thermal aging characteristics and its insulation performance can be improved by using nano-modification technology. In this paper, the nano-SiO2 particles were used as the modified additives, and the modified aramid insulation paper was prepared through four steps: ultrasonic stirring, fiber dissociation, paper sample copying and superheated calendering. The microscopic physical morphology and chemical components of the insulation specimens before and after modification were analyzed by atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), and an OIP bushing model based on the modified aramid insulation paper was constructed and its electric field distribution was analyzed. The simulation results show that the use of SiO2-modified aramid insulation paper can improve the electric field distribution of OIP bushings and increase the operating life of power transformers.

A novel P/N/Si/Zn-containing hybrid flame retardant for enhancing flame retardancy and smoke suppression of epoxy resins

“…1(i), demonstrating the formation of ZIF-8. 39,40 The combined FT-IR, XRD, SEM, and XPS results indicated that APHZ was successfully synthesized.…”

KH550‐SiO2/polyimide insulating paper preparation and characterisation

“…The heat-resistant insulating paper is primarily used for slot wedge insulation, phase insulation in electric machines, and inter-turn insulation in transformers for high-speed railways [1][2][3][4][5]. Currently, aramid insulating paper [6][7][8][9] and polyimide (PI) insulating paper [10][11][12][13] are widely used as heat-resistant insulating papers. Nomex410 [14,15] is a specific type of high-density meta-aramid paper that is produced by rolling at high temperatures and under high pressure.…”