Impedance Modeling and Analysis of Grid-Connected Voltage-Source Converters

This paper presents small-signal impedance modeling of grid-connected three-phase converters for wind and solar system stability analysis. In the proposed approach, a converter is modeled by a positive-sequence and a negative-sequence impedance directly in the phase domain. It is further demonstrate...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2014-03, Vol.29 (3), p.1254-1261
Main Authors: Cespedes, M., Jian Sun
Format: Article
Language:English
Subjects:
Applied sciences
Converter stability
Convertors
Current control
Electric currents
Electrical engineering. Electrical power engineering
Electrical machines
Exact sciences and technology
Frequency-domain analysis
grid-connected converters
harmonic resonance
Impedance
impedance modeling
Measurement
Modeling
Phase locked loops
Power conversion
Power supply
Solar energy
Wind power
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Summary:This paper presents small-signal impedance modeling of grid-connected three-phase converters for wind and solar system stability analysis. In the proposed approach, a converter is modeled by a positive-sequence and a negative-sequence impedance directly in the phase domain. It is further demonstrated that the two sequence subsystems are decoupled under most conditions and can be studied independently from each other. The proposed models are verified by experimental measurements and their applications are demonstrated in a system testbed.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2013.2262473