Simplified dynamic model of a voltage-sourced converter with modular multilevel converter design

This paper introduces a simplified HVDC model developed for modeling the steady-state and the dynamic behavior of a voltage-sourced converter based on the modular multilevel converter design. The simplified model is intended for time domain simulations in a positive sequence dynamic simulation program. The model is used for dynamic stability studies and performance analysis of the HVDC within a large AC network. The simplified model is validated against a detailed model comprising the complete converter controls.