ABSTRACT
One topological derivation from this structure is the diode-clamped multilevel converter (DCMC), whose simplest version, the three-level neutral point clamped converter, was introduced in 1981 by Nabae and coworkers. This chapter focuses on the particular characteristics of the diode-clamped multilevel converter. A suitable control algorithm, which combines the flexibility of multilevel space vector modulation and a DC bus voltage balance control that uses the line voltage redundancy of the three-phase DCMC, is also described. In the next section a multilevel space vector modulator is explained. A method to compute the capacitor voltage deviation is presented in the next section. For an n-level DCMC: The proof of this theorem begins considering the generic equation for the current through capacitor Cj. The line voltage redundancy is introduced and the legs combinations are analyzed in terms of their effects on capacitors' voltages.
