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arXiv · 1907.02187

Small-Signal Stability Analysis for Droop-Controlled Inverter-based Microgrids with Losses and Filtering

Abdullah Al Maruf·Mohammad Ostadijafari·Anamika Dubey·Sandip Roy
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Abstract

An islanded microgrid supplied by multiple distributed energy resources (DERs) often employs droop-control mechanisms for power sharing. Because microgrids do not include inertial elements, and low pass filtering of noisy measurements introduces lags in control, droop-like controllers may pose significant stability concerns. This paper aims to understand the effects of droop-control on the small-signal stability and transient response of the microgrid. Towards this goal, we present a compendium of results on the small-signal stability of droop-controlled inverter-based microgrids with heterogeneous loads, which distinguishes: (1) lossless vs. lossy networks; (2) droop mechanisms with and without filters, and (3) mesh vs. radial network topologies. Small-signal and transient characteristics are also studied using multiple simulation studies on IEEE test systems

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Abdullah Al Maruf, Mohammad Ostadijafari, Anamika Dubey, Sandip Roy. 2019-07-04. Small-Signal Stability Analysis for Droop-Controlled Inverter-based Microgrids with Losses and Filtering. https://doi.org/10.1145/3307772.3328310

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