Abstract

Remotely sited generators that are connected to load centers may economically use HVdc transmission. The possibility of connecting the generators directly to the HVdc converter station, with both ac and dc filters removed, has been discussed frequently in the past, with significant capital and operating savings argued, but as yet without such a system being realized. It would seem that the removal of filters is not feasible. In this paper a 36-pulse operation for the converter station is proposed, whereby substantial reduction of harmonics is achieved, and thus both ac and dc filters may be removed without further implications.