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Modeling and Voltage Balance Control of MMLC Using PI Controller

V.M. Ramaa Priyaa

A modular multilevel converter (MMC) is one of the next generation multilevel converters intended for high- or medium-voltage power conversion without transformers. However, no paper has made an explicit discussion on voltage-balancing control. This paper deals with Multi Carrier pulse width-modulated modular multilevel converters (MCPWMMMCs) with focus on their circuit configurations and voltage balancing control. If the unbalanced load is connected with three phase system, the capacitor’s charging and discharging will be affected so the proper output voltage can’t be obtained. It must be adjusted as proper manner in terms of using PI controller as a compensator which gives proper output voltage and current. Thus the output voltage changes into the proper manner. MATLAB simulink environment is used to simulate the results.