A hybrid bi-directional current source converter with two force-commutated switches and controlled with space vector modulation

SCR based CSC are rugged and affordable but they create low order harmonics and do not allow active and reactive power to be controlled independently. These drawbacks can be overcome with topologies based on more costly force-commutated switches. This paper proposes a hybrid three-phase CSC that employs a three-phase SCR bridge and two switches, presenting features comparable to the fully controllable six switches CSC. Comparisons with the fully controllable CSC are provided for a fair assessment of the potential of the proposed CSC. The theoretical analysis is verified by means of simulations.