Analysis and Mitigation of Oscillatory Instabilities Between GFM-VSG and DOL-IML in Islanded Microgrids
Bibliographic record
Abstract
Islanded converter-based microgrids dominated by direct-on-line induction motor loads (DOL-IMLs) are particularly prone to low-frequency oscillations (LFO), which can threaten system stability and result in economic losses if unaddressed. Despite the critical implications of this issue, its fundamental causes remain relatively under-explored in the existing literature. This paper identifies the underlying causes of this issue by performing a small-signal analysis of an islanded IML-dominated microgrid powered by grid-forming virtual synchronous generators (GFM-VSGs) and grid-following (GFL) converters. Furthermore, the effects of different system parameters such as line impedance, GFM-VSG's voltage control loop bandwidth, virtual impedance, and IML torque are examined. Finally, recommended ranges for key system parameters are provided to suppress the observed LFO.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".