This letter proposes a new control scheme for the
neutral-point (NP) balance in single-phase three-level NP-clamped
converters. The control is addressed considering the plant under
study, a nonlinear time-variant system. A quasi-exact linearization
is applied allowing the application of classic control techniques.
The described method is simple, general, and suitable for buck
and boost topologies, as well as for inverter or rectifier operating
modes under either linear or nonlinear loading. Correct operation
is verified under simulated and experimental operation.
CitationCobreces, S. [et al.]. Exact Linearization Nonlinear Neutral-Point Voltage Control for Single-Phase Three-Level NPC Converters. "IEEE transactions on power electronics", Octubre 2009, vol. 24, núm. 10, p. 2357-2362.
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