Look up table based control of multi-level AC/AC converters with strategy of DC link balancing

A new control algorithm for AC/AC Modular-Multilevel Converter (MMLC) is introduced. This new control algorithm stands out due to its real-time operation and usage of all possible switching states in an MMLC. Independent control of output AC voltage with respect to the input AC voltage or load current is the second feature of the proposed algorithm. This control algorithm is well suited for balancing of DC link voltages which is an important factor when comparing control algorithms. It is shown that this modulation technique is advantageous for implementation of FACTS controllers and high power motor drives.