Stability of DC Distribution Systems
Analytical and Experimental Results
Nils H. Van Der Blij (TU Delft - DC systems, Energy conversion & Storage)
L.M. Ramirez Elizondo (TU Delft - DC systems, Energy conversion & Storage, TU Delft - Software Technology)
M.T.J. Spaan (Zhejiang University - Hangzhou, TU Delft - Algorithmics)
Wuhua Li (Zhejiang University - Hangzhou)
P. Bauer (TU Delft - DC systems, Energy conversion & Storage)
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Abstract
Constant power loads combined with low inertia form a major challenge for future distribution grids. This paper presents a state-space representation to model dc distribution systems. Two methods are discussed to analyze the (small-signal) stability of these dc distribution systems; an algebraic method and a Brayton-Moser method. The system models and the methods for stability analysis were verified using an experimental dc microgrid set-up. Furthermore, it was found that the instability of dc distribution systems can be classified into two categories: equilibrium instability and oscillatory instability.
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