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| Content Provider | IET Digital Library |
|---|---|
| Author | Konga, C. L. Kala Gitau, M. N. Bansal, Ramesh C. |
| Abstract | The three-phase quasi-Z-source AC–DC converter possesses many attractive attributes for applications with wide AC input variations, such as variable speed wind generator applications. This is due to its buck–boost capability, high input power factor, low output ripple and low rating of components. Detailed steady-state and small-signal models of the converter are derived using circuit averaging and the synchronous reference frame. From the steady-state model, it is shown that the three-phase quasi-Z-source rectifier (QZSR) has all the advantages of the three-phase Z-source rectifier (ZSR) as well as further advantages such as lower rated capacitors. The small-signal model reveals that the QZSR has non-minimum-phase zeroes in its control-to-output voltage and control-to-inductor L 1 current transfer-function similar to the ZSR. Right-half-plane zeroes tend to limit the maximum control bandwidth and destabilise the wide-bandwidth feedback loop. The key elements in the design of a closed-loop controller, namely, the transfer functions and the block diagram models are derived. Simulations and experimental results are presented to validate the models developed. |
| Starting Page | 1033 |
| Ending Page | 1040 |
| Page Count | 8 |
| ISSN | 17521416 |
| Volume Number | 10 |
| e-ISSN | 17521424 |
| Issue Number | Issue 7, Aug (2016) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/10/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2015.0313 |
| Journal | IET Renewable Power Generation |
| Publisher Date | 2016-08-01 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | AC-DC Power Converter Block Diagram Model Buck-boost Capability Circuit Averaging Closed Loop System Closed-loop Controller Design Control of Electric Power System Control System Analysis Control System Synthesis Control-to-inductor L1 Current Transfer Function Control-to-output Voltage Feedback Nonminimum Phase Zero Power Factor Power Generation Control QZSR Rectifying Circuit Steady-state Model Synchronous Reference Frame Synthesis Method Three-phase Quasi-Z-source AC-DC Converter Small-signal Model Three-phase Quasi-Z-source Rectifier Transfer Function Variable Speed Wind Generator Application Wide Bandwidth Feedback Loop Wind Power Wind Power Plant |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment |
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