State observer for grid-voltage sensorless control of a grid-connected converter equipped with an LCL filter

Author

Kukkola, Jarno ; Hinkkanen, Marko

Author_Institution

Dept. of Electr. Eng. & Autom., Aalto Univ., Espoo, Finland

fYear

2014

fDate

26-28 Aug. 2014

Firstpage

1

Lastpage

10

Abstract

This paper proposes a simple grid-voltage sensorless alternative to the conventional PLL synchronization for a grid-connected converter equipped with an LCL filter. The grid-voltage magnitude and angle are estimated based only on the converter current and DC-voltage measurements. Reduced number of sensors decreases costs and amount of sensor wiring. The analytically derived design is validated experimentally.

Keywords

LC circuits; observers; phase locked loops; power convertors; power filters; power grids; synchronisation; voltage control; DC-voltage measurements; LCL filter; PLL synchronization; converter current; grid-connected converter; grid-voltage magnitude; grid-voltage sensorless control; sensor wiring; state observer; Current measurement; Estimation error; Integrated circuits; Observers; Transfer functions; Voltage measurement; Adaptive observer; grid-connected converter; grid-voltage sensorless; sensorless control; small-signal linearization;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on

Conference_Location

Lappeenranta

Type

conf

DOI

10.1109/EPE.2014.6910740

Filename

6910740