Power losses in voltage sourced converter (VSC) valves for high-voltage direct current (HVDC) systems -- Part 2: Modular multilevel converters (IEC 62751-2:2014) (english version)
Determination of power losses in high-voltage direct current (HVDC) converter stations with line commutated converters (IEC 61803:1999 + A1:2010 + A2:2016) (english version)