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

fYear

2013

fDate

10-13 Nov. 2013

Firstpage

7129

Lastpage

7133

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE

Conference_Location

Vienna

ISSN

1553-572X

Type

conf

DOI

10.1109/IECON.2013.6700317

Filename

6700317