Title :
Exact Linearization Nonlinear Neutral-Point Voltage Control for Single-Phase Three-Level NPC Converters
Author :
Cobreces, Santiago ; Bordonau, Josep ; Salaet, Joan ; Bueno, Emilio J. ; Rodriguez, Francisco J.
Author_Institution :
Dept. of Electron., Univ. de Alcala, Alcala de Henares, Spain
Abstract :
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.
Keywords :
machine control; nonlinear control systems; power convertors; time-varying systems; voltage control; exact linearization nonlinear control; inverter; neutral-point voltage control; nonlinear time-variant system; rectifier; single-phase three-level NP-clamped converter; Multilevel converters; neutral-point control; nonlinear control;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2009.2015221
