Uhv direct current transmission has developed rapidly in China due to its unique advantages of large capacity, long distance and high voltage. A series of researches have been carried out on the non-characteristic harmonic current in the grid side of uhv dc transmission system. This paper is aimed at the analysis of non-characteristic harmonics in the uhv direct current transmission system using a 12-pulse converter. Under ideal operating conditions, the system has characteristic non-characteristic harmonics. However, the actual operation condition of HVDC project is not ideal, so there are no...
