Title :
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
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;
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
DOI :
10.1109/CPE.2009.5156048
