Nonlinear observer-based capacitor voltage estimation for sliding mode current controller in NPC multilevel converters

Author

Nademi, Hamed ; Das, Aruneema ; Norum, Lars

Author_Institution

Dept. of Electr. Power Eng., Norwegian Univ. of Sci. & Technol., Trondheim, Norway

fYear

2011

fDate

19-23 June 2011

Firstpage

1

Lastpage

7

Abstract

This paper deals with the estimation problem in three-phase, three-level neutral point clamped (NPC) converter via nonlinear observer. An observer based on adaptive backstepping approach is used for capacitor voltages estimation. It is assumed that capacitance value of the DC-link capacitors are unknown.

Keywords

Lyapunov methods; electric current control; fault tolerance; nonlinear control systems; observers; power capacitors; power convertors; sensors; stability; variable structure systems; DC-link capacitor; Lyapunov theory; NPC multilevel converter; adaptive backstepping approach; capacitor voltage balancing; capacitor voltage estimation; current control; fault tolerance; nonlinear observer stability; sliding mode current controller; soft sensors; state estimation; three-phase three-level neutral point clamped converter; Backstepping; Capacitors; Mathematical model; Observers; Switches; Voltage control; Voltage measurement; Adaptive backstepping observer; multilevel converter; sliding mode (SM) control; three-level neutral-point-clamped (NPC) converter; voltage estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

PowerTech, 2011 IEEE Trondheim

Conference_Location

Trondheim

Print_ISBN

978-1-4244-8419-5

Electronic_ISBN

978-1-4244-8417-1

Type

conf

DOI

10.1109/PTC.2011.6019429

Filename

6019429