Stability of DC Distribution Systems: An Algebraic Derivation

Instability caused by low inertia and constant power loads is a major challenge of DC distribution grids. Previous research uses oversimplified models or does not provide general rules for stability. Therefore, a comprehensive approach to analyze the stability of DC distribution systems is desired....

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Bibliographic Details
Published in:Energies (Basel) 2017-09, Vol.10 (9), p.1412
Main Authors: Van der Blij, Nils, Ramirez-Elizondo, Laura, Spaan, Matthijs, Bauer, Pavol
Format: Article
Language:English
Subjects:
Alternative energy
Computer simulation
DC distribution
Eigenvalues
Load
Methods
Sensitivity analysis
Stability
Stability analysis
state-space
Stress concentration
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Summary:Instability caused by low inertia and constant power loads is a major challenge of DC distribution grids. Previous research uses oversimplified models or does not provide general rules for stability. Therefore, a comprehensive approach to analyze the stability of DC distribution systems is desired. This paper presents a method to algebraically analyze the stability of any DC distribution system through the eigenvalues of its state-space matrices. Furthermore, using this method, requirements are found for the stability of three example systems. Additionally, a sensitivity analysis is performed, which considers the effect of several system parameters on the stability and disputes some overgeneralized conclusions of previous research. Moreover, various simulations are performed to illustrate the dynamic behavior of a stable and an unstable DC distribution system.
ISSN:1996-1073
1996-1073
DOI:10.3390/en10091412