Monte Carlo Based Reliability Estimation Methods in Power Electronics

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Abstract

In mission-profile based reliability assessments, it is a common method to calculate the static parameters that represent the thermal stress of power electronic converters. These parameters are afterwards used in Monte Carlo (MC) simulations for estimating the expected lifetime of the components in power converters taking into account variations. However, the static parameters do not always represent the real field operating conditions of the components in power converters. To overcome this limitation, two approaches to introduce a parameter variance are implemented in the dynamic mission profile characteristics used in MC simulations in this paper. In two different application cases, it is demonstrated that using static parameters can introduce a significant error in the MC simulation. For the photovoltaic (PV) inverter applications the lifetime of a semiconductor can be overestimated up to 30% if the static parameters are used, while for uninterrupted power supply (UPS) system applications this difference can reach almost 50%.
Original languageEnglish
Title of host publication2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
Number of pages7
PublisherIEEE Press
Publication dateNov 2020
Pages1-7
ISBN (Print)978-1-7281-7161-6
ISBN (Electronic)978-1-7281-7160-9
DOIs
Publication statusPublished - Nov 2020
Event21th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020 - Aalborg, Denmark
Duration: 9 Nov 202012 Nov 2020

Conference

Conference21th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020
Country/TerritoryDenmark
CityAalborg
Period09/11/202012/11/2020
SeriesIEEE Workshop on Control and Modeling for Power Electronics (COMPEL)
ISSN1093-5142

Keywords

  • converter reliability
  • Lifetime prediction
  • Mission profiles
  • Monte Carlo Method

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