ABSTRACT
The oldest form of a Current Source Converter was the AC/DC Silicon-controlled rectifier-based rectifier without the DC-side capacitive filter, where thyristors are controlled to adjust the load current that is flowing from grid to the load. The success of Space Vector Modulation algorithms for control of the voltage source converters has recommended the method in controlling current source converters. More efforts consider multilevel current source converters where multiple stages are able to add the load current building up a current waveform with multiple steps. An alternative topology consists of a Current Source Converter. Most of the Pulse width modulation algorithms are similar to those for the Voltage Source Converters in terms of generating pulses by a comparison between a reference waveform and a carrier. The optimization of the multilevel current waveforms can be achieved very similar to the optimization of voltage source converters at waveform level.
