Simulation research of current-modulated tripole DC transmission system

This paper introduced a method of converting AC transmission lines to tripole DC using current modulation. This method cannot only make full use of existing lines and equipment, but also improve power capacity and system performance. So it is available in both technology and economy. This paper also analyzed the principles of current modulation. Moreover, tripole DC transmission system is simulated by PSCAD/EMTDC. The simulation results showed that tripole DC transmission scheme is available by using current modulation.