Grid connection of Modular Multilevel converter

This paper presents the detailed understanding of Modular Multilevel converters for its applications in HVDC and FACTS. Along with this, mathematical model of the converter in state space representation is presented. Scalability and modular nature of this configuration are making it a promising VSI topology in high power applications. To explore its applications in HVDC and FACTS controllers a detailed parameter design procedure is presented. In parameter design procedure selection of arms inductance and submodule capacitance is an essential part to minimize the circulating currents and to avoid resonance in the circuit. For validating the PQ-Controller for Modular Multilevel Converter a STATCOM is designed and its simulation results produces in PSCAD/EMTDC environment are presented.