Power converter junction temperature measurement using infra-red sensors

Studies demonstrate that the power converter has one of the highest failure rates in a wind turbine, with a key failure driver being the power module junction temperature (T(j)). This paper details an experimental setup for simplified emulation of wind turbine conditions on a power converter with infra-red sensing of IGBT T(j). Results are compared to previous simulation work for a PMSG wind turbine, with the same trend of increasing mean T(j) with wind speed found, and the need to use an equivalent generator reactance in highlighted. A commercial-scale prototype for more accurate wind turbine converter emulation is also detailed.

Abstract licence: CC BY-ND

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