Complex State-Space Current Controller for Grid-Connected Converters with an LCL Filter

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

Carlos Ramos (Author) FEUP; António Pina Martins (Author) FEUP; Adriano Carvalho (Author) FEUP

Conference proceedings International

Title: IECON: 2009 35TH ANNUAL CONFERENCE OF IEEE INDUSTRIAL ELECTRONICS, VOLS 1-6

Pages: 262-267

35th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON 2009)

Porto, PORTUGAL, NOV 03-05, 2009

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 4 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-003-QEE

DOI: 10.1109/iecon.2009.5414938

Abstract (EN): Grid-connected voltage source converters using an LCL filter offer reduced harmonics in the grid current. The stem modeling results in a multivariable system with cross coupling. Additionally, the system contains three state-variables instead of the one occurring in the case of grid connection using only one inductance. All the three variables must be measured or estimated. Also, the LCL filter has a resonant frequency that can cause unstable behavior. This variable resonant frequency is usually considered using a damping resistor or active damping. The main purpose of the paper is to present a methodology to design a current controller based on the concept of a controller in the complex domain. The complex controller is obtained using the pole placement method and it uses a state observer in order to only measure the grid current as state variable. The simulation results presented clearly demonstrate the validity of the design approach.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6