Title :
Active damping of LCL filter without capacitor voltage sensors for three phase PWM inverter
Author :
Byoung-Woong An ; Hag-Wone Kim ; Kwan-Yuhl Cho ; Byung-Moon Han ; Gyo-Bum Chung
Author_Institution :
Dept. of Control & Instrum. Eng., Korea Nat. Univ. of Transp., Chungju, South Korea
Abstract :
In this paper, new sensorless active damping method of the grid-connected LCL filter for a three-phase PWM inverter is proposed. The resonance component of capacitor voltage of LCL filter is observed by a simple MRAS (Model Reference Adaptive System) observer without additional sensors or circuits. The active damping is implemented by feed-forward compensation of the observed capacitor voltage for current controller. The validity of the proposed method is verified by the simulation and experiment.
Keywords :
LC circuits; PWM invertors; compensation; damping; electric current control; feedforward; model reference adaptive control systems; observers; power grids; voltage control; current controller; feedforward compensation; grid-connected LCL filter; model reference adaptive system; observed capacitor voltage sensor; resonance component; sensorless active damping method; simple MRAS observer; three phase PWM inverter; Capacitors; Damping; Equations; Inverters; Mathematical model; Power harmonic filters; Pulse width modulation; Active damping; LCL filter; MRAS(Model Reference Adaptive System) Observer; SVPWM Inverter;
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
DOI :
10.1109/IECON.2013.6700317
