High frequency grid impedance analysis with three-phase converter and FPGA based tolerance band controller

Author

Knop, A. ; Fuchs, F.W.

Author_Institution

Inst. of Power Electron. & Electr. Drives, Christian-Albrechts-Univ. of Kiel, Kiel, Germany

fYear

2009

fDate

20-22 May 2009

Firstpage

286

Lastpage

291

Abstract

The electrical grid features show a frequency dependent impedance. To know their value in the frequency range between grid fundamental frequency and up to frequency´s in the kHz-range is very useful. It contributes to optimize energy feed in as well as from decentralized converter equipped renewable sources. This paper presents an advanced frequency dependent impedance measurement system for the energized grid with a high frequency range. For these grid impedance measurements a fast switching three-phase high frequency converter with a fast and robust control is required. Control is carried out by a FPGA based tolerance band or hysteresis control. The power circuit for high frequency (up to 10 kHz) measuring current is presented and measurements are shown and analyzed.

Keywords

electric impedance measurement; field programmable gate arrays; frequency control; power grids; robust control; switching convertors; tolerance analysis; FPGA-based tolerance band controller; fast switching three-phase high-frequency converter; high-frequency grid impedance measurement analysis; hysteresis control; robust control; Current measurement; Feeds; Field programmable gate arrays; Frequency conversion; Frequency dependence; Frequency measurement; Impedance measurement; Power measurement; Robust control; Switching converters;

fLanguage

English

Publisher

ieee

Conference_Titel

Compatibility and Power Electronics, 2009. CPE '09.

Conference_Location

Badajoz

Print_ISBN

978-1-4244-2855-7

Electronic_ISBN

978-1-4244-2856-4

Type

conf

DOI

10.1109/CPE.2009.5156048

Filename

5156048