DC-Link Stabilization and Voltage Sag Ride-Through of Inverter Drives
Pietilainen, K.
Harnefors, L.
Petersson, A.
Nee, H.-P.
Malardalen Univ., Vasteras;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: June 2006
Volume: 53,
Issue: 4
On page(s): 1261-1268
ISSN: 0278-0046
INSPEC Accession Number: 9064502
Digital Object Identifier: 10.1109/TIE.2006.878308
Current Version Published: 2006-08-07
Abstract
Previous results concerning instability of the dc link in inverter drives fed from a dc grid or via a rectifier are extended. It is shown that rectifier-inverter drives equipped with small (film) dc-link capacitors may need active stabilization. The impact of limited bandwidth and switching frequency in the inverter-motor current control loop is considered, and recommendations for selection of the dc-link capacitor, the switching frequency, and the dc-link stabilization control law in relation to each other are given. This control law is incorporated in a field-weakening (to enhance voltage sag ride-through) current controller for which design recommendations are presented
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