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Inverter DC-Link Stabilizing Control with Improved Voltage Sag Ride-Through Capability
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| Author(s) |
PIETILAeINEN Kai; HARNEFORS Lennart |
| Abstract |
Previously published results concerning instability of the dc link in inverter drives fed from a dc grid or via a rectifier are extended in this paper. 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. 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. The control law is incorporated in a previously proposed current controller, which is designed for good voltage sag ride-through capability. |
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| Filename: | 0586 |
| Filesize: | 1.405 MB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-05 by System |
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