Direct connection of series self-excited generators and HVDC converters

An alternative and simpler solution is proposed for the direct connection of generators to HVDC converters. The generator exciter windings are connected in series with the output of the HVDC converter and take the place of the conventional smoothing reactor. Existing steady state and time domain simulation programs are modified to represent the behaviour of the series direct connection scheme. It is shown that series excitation naturally extends the power transmission capability and permits fast fault clearances