The penetration of renewable energy resources is changing the way the power system is understood and operated. With an increasing number of power electronics devices integrated into the power system, the modular multilevel converter (MMC) is arising as one of the key technologies for HVDC applications. While several control strategies for MMCs have been proposed in the last years, designing controls for MMCs remains a challenging and non-trivial problem due to its large number of degrees of free...
Enric Sánchez-Sánchez [et al.]. Optimal multivariable MMC energy-based control for DC voltage regulation in HVDC applications. "IEEE transactions on power delivery", 1 Abril 2020, vol. 35, núm. 2, p. 999-1009.