NDLI: Power electronics modeling fidelity: Impact on stability estimate of micro-grid systems

Content Provider	IEEE Xplore Digital Library
Author	Acevedo, S.S. Molinas, M.
Copyright Year	2011
Description	Author affiliation: Department of Electrical Power Engineering, Norwegian University of Science and Technology, Trondheim, 7491 Norway (Acevedo, S.S.; Molinas, M.)
Abstract	Stability analysis of AC and DC distributed power systems dominated by power electronics devices is a challenge for designers of connected or isolated micro-grids, due to the ideal conditions considered by the manufacturers; this should cause that the system reach an unstable state. This paper focuses in the analysis based on impedance representation of a single phase inverter operating as voltage source, where the Nyquist criteria is realized for a renewable energy micro-grid isolated configuration. Also, three small signal input impedance modeling methods are described, the first is the reduced order modeling methodology or steady state variables averaged model, the second is based on the assumption of no energy storage at the AC and DC side of the inverter, and the third uses an approximation of the impedance with current frequency components. For the three methods a comparative evaluation with the impedance obtained was realized by the application of a voltage perturbation to the DC side. The obtained results show that the proposed method of no energy storage can be employed in the studies of stability for micro grid systems.
Starting Page	1
Ending Page	8
File Size	338191
Page Count	8
File Format	PDF
ISBN	9781457708732
e-ISBN	9781457708756
e-ISBN	9781457708749
DOI	10.1109/ISGT-Asia.2011.6167159
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-11-13
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage measurement Impedance measurement Pulse width modulation converters Inverters Stability analysis Frequency measurement Smart grids Impedance Mathematical model
Content Type	Text
Resource Type	Article

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