Title :
DC-Link Stabilization and Voltage Sag Ride-Through of Inverter Drives
Author :
Pietiläinen, Kai ; Harnefors, Lennart ; Petersson, Andreas ; Nee, Hans-Peter
Author_Institution :
Malardalen Univ., Vasteras
fDate :
6/1/2006 12:00:00 AM
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
Keywords :
electric current control; electric drives; invertors; magnetic fields; power capacitors; power supply quality; rectifiers; stability; control law; dc grid; dc-link capacitor; dc-link stabilization; field weakening; inverter drives; invertor-motor current control loop; rectifier; stabilization; switching frequency; voltage sag ride-through; Bandwidth; Capacitors; Damping; Inductors; Inverters; Power system stability; Rectifiers; Switching frequency; Voltage control; Voltage fluctuations; Active stabilization; field weakening; induction motor; variable-speed drive; voltage sag ride-through;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2006.878308
