Referenced Items are not available for this document.
Inductance-capacitor-inductance (LCL)-filters installed at converter outputs offer higher harmonic attenuation than L-filters, but careful design is required to damp LCL resonance, which can cause poorly damped oscillations and even instability. A new topology is presented for a discrete-time current controller which damps this resonance, combining deadbeat current control with optimal state-feedback pole assignment. By separating the state feedback gains into deadbeat and damping feedback loops, transient overcurrent protection is realizable while preserving the desired pole locations. Moreover, the controller is shown to be robust to parameter uncertainty in the grid inductance. Experimental tests verify that fast well-damped transient response and overcurrent protection is possible at low switching frequencies relative to the resonant frequency
Published in:
Power Electronics, IEEE Transactions on
(Volume:21
,
Issue:
5
)
Date of Publication: Sept. 2006
- Page(s):
- 1364 - 1373
- ISSN :
- 0885-8993
- INSPEC Accession Number:
- 9067926
- Digital Object Identifier :
- 10.1109/TPEL.2006.880271
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 September 2006
- Issue Date :
- Sept. 2006
- Sponsored by :
- IEEE Power Electronics Society
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