Investigation on Humidity Effect on Partial Discharge Considering Thermal Aging

Yatai Ji, Paolo Giangrande, Vincenzo Madonna, Weiduo Zhao, Michael Galea, Jing Li, He Zhang

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

Throughout the years, the humidity effect on Partial Discharge Inception Voltage (PDIV) has been investigated revealing the complexity of the interaction between moisture and insulation material. Although the importance of these studies, the Electrical Machine (EM) insulation system experiences combined stresses when in service. Thus, attention is paid to the impact of humidity on PDIV under different thermal aging levels, since the hygroscopicity of insulation material might change during its lifetime. For the experimental investigation, three groups of twisted pairs are prepared and one is unaged while the remaining two are thermally aged at 250°C for 48 and 96 hours respectively. The PDIV and insulation capacitance under sinusoidal excitation is then measured at a fixed 30 °C ambient temperature with three different relative humidity conditions: 30%, 45%, and 60%. The obtained results are discussed and an explanation of the combined effect of humidity and thermal aging is given.

Original languageEnglish
Title of host publication2022 International Conference on Electrical Machines, ICEM 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2325-2330
Number of pages6
ISBN (Electronic)9781665414326
DOIs
Publication statusPublished - 2022
Event2022 International Conference on Electrical Machines, ICEM 2022 - Valencia, Spain
Duration: 5 Sep 20228 Sep 2022

Publication series

Name2022 International Conference on Electrical Machines, ICEM 2022

Conference

Conference2022 International Conference on Electrical Machines, ICEM 2022
Country/TerritorySpain
CityValencia
Period5/09/228/09/22

Keywords

  • Aging
  • Electric Machines
  • Humidity
  • Insulation
  • Partial discharge

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

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