Cascaded- and Modular-Multilevel Converter Laboratory Test System Options: A Review. - Theodor Heath; Mike Barnes; Paul D. Judge; Geraint P. Chaffey; Phil Clemow; Tim C. Green; Peter R. Green; James Wylie; Georgios Konstantinou; Salvador Ceballos; Josep Pou; Mohamed Moez Belhaouane; et al. (IEEE Access, 2021)