Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Design Methodology of Digital Controller Considering Time Delay Effect for a Modular Multilevel Converter VSC HVDC System
Authors Ji-Wan Song ; Nam-Joon Ku ; Rae-Young Kim
DOI 10.6113/TKPE/2016.21.1.49
Page pp.49-57
ISSN 1229-2214
Keywords Time delay effect; Modular multilevel converter; Digital control; High voltage direct current
Abstract A modular multilevel converter is widely adapted for a high-voltage direct current power transmission system. This study proposes a design methodology for a novel digital control that mitigates the negative effects caused by time delay, including communication transport delay for a modular multilevel converter. The modeling and negative effect of time delay are analyzed theoretically in a frequency domain, and its compensation methodology based on an inverse model is described fully with practical considerations. The proposed methodology is verified through several simulation results using a modular 21-level converter system.