Abstract
The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right-half-plane (RHP) poles. This article thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.
Original language | English |
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Article number | 8826385 |
Journal | IEEE Transactions on Power Electronics |
Volume | 35 |
Issue number | 4 |
Pages (from-to) | 4388-4397 |
Number of pages | 10 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Apr 2020 |
Keywords
- Interconnected converters
- Right half-plane poles
- Bode plots
- Impedance-based analysis
- Stability
- inter-connected converters
- right-half-plane (RHP) poles
- impedance-based analysis
- stability