Adaptive Current-Angle-Based Phase Selection for Microgrids With Inverter-Interfaced Renewable Energy Sources
Why this work is in the frame
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Bibliographic record
Abstract
Renewable energy sources (RESs) possess different fault signatures as compared to the traditional synchronous generators, thus introducing new challenges for microgrid protection. Among these challenges is phase selection, which is a prerequisite for selective phase tripping (SPT). This paper analyzes the root causes behind the failure of current-angle-based phase selection methods (PSMs) used by commercial relays in microgrids with inverter-interfaced RESs (IIRESs). Besides, the operation of the recently-developed voltage-angle-based PSM is investigated to unveil its points of strength and weakness. Then, adaptive zoning for the current-angle-based PSM is proposed to cope with the unconventional IIRES fault current signatures and enable precise SPT. As a result, microgrid reliability and resiliency during faults are enhanced. The proposed PSM depends on local measurements to update the PSM zones online by estimating the angles between the sequence impedances behind a relay. Comprehensive time-domain simulations verify the effectiveness of the proposed PSM at various fault resistances, fault locations, and microgrid topologies.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.000 | 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 it