Multiple‐Bridge‐Module High‐voltage Converters

The modular multilevel converter (MMC) has gained in popularity, especially in high‐voltage direct current (HVDC) and flexible alternating current transmission systems (FACTS). Similar to the structure of the MMC, a novel high‐voltage converter named the multiple‐bridge‐module converter (MBMC) is put forward for the first time by connecting the bridge modules in series. This chapter discusses the topological structure, operating principle, and control scheme of the different kinds of MBMC. It illustrates the single‐phase half‐bridge module (SP‐HBM), which includes two half‐bridge cells and one common capacitor C
_BM
; the single‐phase full‐bridge module (SP‐FBM); the three‐phase full‐bridge module (TP‐FBM); and the three‐phase four‐leg full‐bridge module (TPFL‐FBM). The chapter shows that the structure of the single‐phase half‐bridge‐module DC‐AC converter is similar to the proposed three‐phase half‐bridge‐module DC‐AC converter. By replacing the half‐bridge modules with the full‐bridge ones, full‐bridge‐module high‐voltage converters can be built.