Recently back-to-back HVdc systems have greatly increased. They interconnec
t large power systems offering numerous technical and economic benefits. Th
e design of AC system filters, however, is not an easy task. Also, filters
do not remove all the harmonics for which they are tuned, are costly and ha
ve a complicated transient behavior. In this paper a 36-pulse filterless co
nfiguration for back-to-back HVde systems is proposed, whereby harmonics ar
e eliminated within the converter, thus opening the possibility of advantag
es in aspects of design, reliability and capital savings.