A new digital protection for grid-connected battery storage systems
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Bibliographic record
Abstract
In this paper, a new digital protection is developed and tested for grid-connected battery storage systems (BSSs). The proposed protection is designed using multiple digital relays that are located in different parts of the protected BSS. Each digital relay is featured with a phaselet-based fault detection. The outputs of the developed protection are trip signals to operate circuit breakers in the charging and discharging circuits, battery units, and point-of-common-coupling. The developed modular digital protection is implemented for simulation testing on a 250 kW grid-connected BSS that is charged through a 3φ ac-dc power electronic converter (PEC), and discharged through a 3φ dc-ac PEC. Simulation results show that the developed protection can initiate fast, accurate, and reliable responses to faults occurring in different parts of the protected BSS. These response features have negligible sensitivity to the type and/or location of faults, charge/discharge cycles of the BSS, and/or levels of power exchange with the host power system.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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