Finite element analysis of electrical stresses in the insulation system of rotating machines fed by static converters

authored by

Reza Sargazi, Peter Werle, Asghar Akbari

Abstract

Nowadays, thanks to the recent advances in semiconductor technology, variable frequency drives (VFD) can be implemented in high voltage rotating machines. However, such applications require new considerations both in design as well as manufacturing processes of insulation systems, in particular as to the stator winding. In practice, due to practical problems in electric field sensors, the addressed new electrical stresses can only be measured as for the tangential electric field component over a surface of the insulation system. Finite element methods (FEM) entitle manufacturer to have an accurate estimation of electric fields at arbitrary regions of a defined geometry. In this contribution, three dimensional models of stator winding including both roebel bar and multi-turn coil are developed to highlight the major differences of electric field distribution between two cases of a conventional power frequency supply and a converter-fed supply on the insulation system.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

External Organisation(s)

K.N. Toosi University of Technology

Type

Conference contribution

Pages

54-59

No. of pages

6

Publication date

2021

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Engineering

Electronic version(s)

https://doi.org/10.1049/icp.2022.0477 (Access: Closed)