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Impact of wind conditions on thermal loading of PMSG wind turbine power converters

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      Abstract

      Power converter reliability is critical for permanent magnet synchronous generator (PMSG) wind turbines. Converter failures are linked to power module thermal loading but studies often neglect turbine dynamics, control and the impact of wind speed sampling rate on lifetime estimation. This study addresses this using a 2 MW direct-drive PMSG wind turbine model with a two-level converter, and simulating junction temperatures ( T j) using a power module thermal equivalent circuit under various synthetic wind speed conditions. These synthetic wind conditions include constant and square wave profiles representing stable and gusty wind conditions. Responses to square wave wind speeds showed that the lower the gust frequency, the higher Δ T j becomes, demonstrating that low turbulence sites have greater thermal variation in the converter. In contrast, wind speed variations with frequencies >0.25 Hz deliver only small increases in Δ T j. It is concluded that reasonable approximations of T j profiles can be made with 0.25 Hz wind speed data, but that lower data rate wind measurements miss essential, damaging characteristics.

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      Most cited references 8

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      Thermal Loading and Lifetime Estimation for Power Device Considering Mission Profiles in Wind Power Converter

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        Control of variable speed wind turbines: Dynamic models

         W. Leithead,  B Connor (2010)
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          Thermal Loading and Reliability of 10-MW Multilevel Wind Power Converter at Different Wind Roughness Classes

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            Author and article information

            Affiliations
            School of Engineering and Computing Sciences, Durham University , South Road, Durham, UK
            Contributors
            Journal
            IET-PEL
            IET Power Electronics
            IET Power Electron.
            The Institution of Engineering and Technology
            1755-4535
            1755-4543
            1 June 2017
            10 July 2017
            9 September 2017
            : 10
            : 11
            : 1268-1278
            10.1049/iet-pel.2016.0802 IET-PEL.2016.0802 PEL.SI.2016.0802.R1

            This is an open access article published by the IET under the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/3.0/)

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            Pages: 0
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            Funding
            Funded by: EPSRC SUPERGEN Wind
            Award ID: EP/L014106/1
            Categories
            Special Section: Selected papers from the 8th International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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