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Capacitor Voltage Control Techniques of the Z-source Inverter: A Comparative Study
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| Author(s) |
Omar Ellabban; Joeri Van Mierlo; Philippe Lataire |
| Abstract |
The Z-source inverter (ZSI) is a recently proposed single-stage power conversion topology. It adds voltage boost capability for complementing the usual voltage buck operation of a traditional voltage source inverter (VSI) with improved reliability. In this paper, a single-loop and dual-loop capacitor voltage control techniques for the ZSI are digitally designed based on a third order small signal model of the ZSI, implemented using a digital signal processor (DSP) and compared. Simulation and experimental results of a 30 kW ZSI during input voltage changes, load disturbances and
steady state operations are presented and compared. The results show that the dual-loop capacitor voltage control technique achieves better steady state and transient performance and enlarge the stability margins of the ZSI compared to the single-loop capacitor voltage control technique. |
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| Filename: | Unnamed file |
| Filesize: | 911 KB |
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| Type |
Members Only |
| Date |
Last modified 2012-04-18 by System |
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