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Stability Investigation of Power Electronics Systems; A Microgrid Case

Sanchez, Santiago
Doctoral thesis
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URI
http://hdl.handle.net/11250/281238
Date
2015
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  • Institutt for elkraftteknikk [2667]
Abstract
This thesis is focused on the stability of systems containing high power electronic

devices. The study mainly involves the exchanger device in a hybrid current

microgrid. This microgrid has a topology with a DC bus and an AC bus. The

stability analysis was performed for a small signal during short- and long-term

perturbation. The short-term tests are presented in the frequency domain with

the Nyquist stability criteria. This method has several practical advantages that

facilitate its implementation. The long-term tests use eigenvalues and a semirecursive

method to estimate the low frequency equivalent of the microgrid. A

continuation method has been applied to analyze the stability of the system with

the full information about the microgrid. The loadability and controllability of

the system has been tested with this method.
Publisher
NTNU
Series
Doctoral thesis at NTNU;2015:2

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