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Impedance-Based Stability Analysis of Droop-Controlled AC Microgrids with the Generalized Nyquist Criterion
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| Author(s) |
Robin STRUNK, Axel MERTENS |
| Abstract |
An impedance model of a droop-controlled inverter is derived analytically. The cross-coupling between a distortion frequency and its mirrored frequency component is considered. This requires the impedance to be modeled as a MIMO system. An impedance-based stability analysis of a microgrid with two grid-forming inverters is performed. The results are validated by a laboratory test. This shows how high droop coefficients can deteriorate the stability of a mircogrid and that the instability can be predicted with the analytic model. |
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| Filename: | 0260-epe2023-full-10454254.pdf |
| Filesize: | 1.461 MB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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