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Inverse Nyquist Stability Criterion for Grid-Tied Inverters.
- Source :
- IEEE Transactions on Power Electronics; Feb2017, Vol. 32 Issue 2, p1548-1556, 9p
- Publication Year :
- 2017
-
Abstract
- A new impedance-based stability criterion was proposed for a grid-tied inverter system based on a Norton equivalent circuit of the inverter <xref ref-type="bibr" rid="ref18">[18]</xref>. As an extension of the work in <xref ref-type="bibr" rid="ref18">[18]</xref>, this paper shows that using a Thévenin representation of the inverter can lead to the same criterion in <xref ref-type="bibr" rid="ref18">[18]</xref>. Further, this paper shows that the criterion proposed by Middlebrook can still be used for the inverter systems. The link between the criterion in <xref ref-type="bibr" rid="ref18">[18]</xref> and the original criterion is the inverse Nyquist stability criterion. The criterion in <xref ref-type="bibr" rid="ref18">[18]</xref> is easier to be used. Because the current feedback controller and the phase-locked loop of the inverter introduce poles at the origin and right-half plane to the output impedance of the inverter. These poles do not appear in the minor loop gain defined in <xref ref-type="bibr" rid="ref18">[18]</xref> but in the minor loop gain defined by Middlebrook. Experimental systems are used to verify the proposed analysis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 32
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 119492159
- Full Text :
- https://doi.org/10.1109/TPEL.2016.2545871