Title :
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
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;
Conference_Titel :
PowerTech, 2011 IEEE Trondheim
Conference_Location :
Trondheim
Print_ISBN :
978-1-4244-8419-5
Electronic_ISBN :
978-1-4244-8417-1
DOI :
10.1109/PTC.2011.6019429
