The GK Dürnrohr (German abbreviation for Gleichstromkurzkupplung Dürnrohr, in English meaning Dürnrohr HVDC-Back-to-Back Station) was a high-voltage direct current back-to-back scheme west of Dürnrohr substation, which was used for the energy exchange between Austria and Czechoslovakia between 1983 and 1996. The installation is no longer in use. The GK Dürnrohr had a nominal transmission rating of 550 MW.