| Abstract |
Modular Multilevel Converter (MMC) has gained a lot of interest in industry in the recent years due toits modular design and easy adaption for applications that require different power and voltage level.However, the control and operation of a real MMC consisting of large number of sub modules for highpower and high voltage application is a very challenging task. For the reason that distributed controlarchitecture could maintain the modularity of the MMC, this control architecture will be investigatedand a distributed control system dedicated for MMC will be proposed in this paper. The suitablecommunication technologies, modulation and control techniques for the proposed distributed controlsystem are discussed and compared. Based on the frequency domain modeling and analysis of thedistributed control system, the controllers of the different control loops are designed by analyticalmethods and Matlab tools. Finally, sensitiveness of the distributed control system to modulation effect(phase-shifted PWM), communication delay, individual carrier frequency and sampling frequency isstudied through simulations that are made in Matlab Simulink and PLECS. |
