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Harmonic Transfer-Function-Based αβ -Frame SISO Impedance Modeling of Droop Inverters-Based Islanded Microgrid With Unbalanced Loads.
- Source :
-
IEEE Transactions on Industrial Electronics . Jan2023, Vol. 70 Issue 1, p452-464. 13p. - Publication Year :
- 2023
-
Abstract
- Impedance-based approachis generally studied for stability analysis of the power electronic converter-based system. Considering multiple-frequency coupling effects, in this article, we establish the harmonic transfer function (HTF) based αβ-frame impedance models of droop inverters based islanded microgrid with unbalanced loads. Therein, the HTF-based αβ-impedance modeling methods of unbalanced loads, as well as droop inverters in parallel, are proposed. Afterward, the HTF-based αβ-frame impedance models are equivalent to single-input single-output (SISO) impedances for simpler impedance measurement and stability analysis, preserving the αβ-frame coupling and multiple-frequency coupling characteristics. Finally, the experimental measurement results verify the accuracy of the αβ-frame SISO impedances. Besides, the stability analysis based on the SISO impedance models accurately reveals low-frequency oscillations of the islanded microgrid with unbalanced loads, further verifying the effectiveness of the SISO impedance models. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MICROGRIDS
*HARMONIC functions
*TRANSFER functions
*ELECTRONIC systems
Subjects
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 70
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 158870120
- Full Text :
- https://doi.org/10.1109/TIE.2022.3156043