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A non-linear control strategy for a cascaded multilevel STATCOM using a fixed switching sequence
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| Author(s) |
D. Soto; R. Peña; V. Herrera |
| Abstract |
A non-linear control strategy based on the feedback linearising theory for a cascaded multilevel
STATCOM is developed. In keeping with the need of high power converters, switching of devices is
limited to line switching frequency. In addition, commutation sequence is kept fixed in order to
maximise harmonic performance. The non-linear approach allows fast control of the reactive current.
This overcomes the limitations on voltage control imposed by the use low switching frequency. DC
voltage balance is maintained using an asymmetrical switching sequence. The self-balancing property
of this switching sequence is explained through a mathematical analysis. Simulation and experimental
results, from a low power 5-level prototype, confirm the effectiveness of both reactive current and DC
link voltage balance control strategies. |
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| Filename: | EPE2003-PP0583 - Soto |
| Filesize: | 1.175 MB |
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| Type |
Members Only |
| Date |
Last modified 2003-12-09 by Unknown |
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