Life-time investigation of mica-based insulation for high voltage machines subjected to converter-like voltages

Sahlén, F.; Paulsson, Goran; Mårtensson, Eva

doi:10.1109/eic.2016.7548637

Cited by 11 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These more stressful constraints will eventually lead to the increase of the PD activity between phases or between phase and ground. It is for this reason that such an electrical stress mapping in operating conditions is one of the key building blocks for a better understanding [16], reproduction [17], detection [18] and monitoring [19] of the phenomenon. The next step in the work will be to establish a correlation between electrical stress and PDs activity, by performing measurements and, even further rooted in the future, by carrying on accelerated ageing on representative samples.…”

Section: Resultsmentioning

confidence: 99%

Electrical stress mapping in a Type II machine supplied by inverters using Si and SiC‐based components

Acheen

Abadie

Lebey

et al. 2020

IET Electric Power Applications

View full text Add to dashboard Cite

The introduction of Silicon Carbide (SiC) based components in the electromechanical chain presents numerous advantages but has consequences on the reliability of the insulation systems in the machine. It is, therefore, necessary to determine whether, under normal operating conditions, phenomena that did not previously exist or were not completely apprehended will appear with the transition to SiC-based inverters. One of these phenomena is partial discharge (PD) and its development in machines, and more precisely in the turn-to-turn, turn-to-ground, and phase-to-phase insulation systems. The present study reports the investigations carried out on a high voltage machine fed by inverters using Silicon (Si) and SiC-based components. It forms part of a general study in which the primary objective is to determine the electrical stress to which the machine is subject, in order to systematically determine the conditions of occurrence of PDs and their consequences on the insulation system lifetime. The following work, which is the first part of the investigation, seeks to perform a thorough electrical stress mapping depending on both geometric and electrical parameters. An analysis of the results will also be presented, as well as thoughts concerning future work, especially regarding the link between electrical constraints and PD activity.

show abstract