Voltage Collapse Owing to Cascading Failures Under Geomagnetic Disturbances in Electromagnetic Transient Perspective
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Bibliographic record
Abstract
Under severe geomagnetic disturbances (GMDs) caused by intense solar activity, transformers in the power grid will generate groups of massive reactive power losses and harmonic currents. At the same time, harmonic currents can readily cause the mal-operation of relay protection device for reactive power compensation, which puts the power grid in a state of insufficient reactive power, leading to local reactive power imbalances. This may cause cascading failures and even voltage collapse, resulting in a large-scale power blackout. This article analyzes the mechanism and triggering conditions of cascading failures, proposes the development process of voltage collapse caused by sensitive equipment in the power grid. Based on this, the electromagnetic transient simulation of a four-station eight-node and IEEE 118-GMD grid was used to simulate the voltage collapse owing to cascading failures under GMDs, verifying the correctness of the proposed theory. Further, the occurrence patterns of cascading failures in the power grid during geomagnetic storms were summarized based on the simulation result, and the triggering conditions and influencing factors leading to voltage collapse were identified. This provides guidance for accurately and quickly identifying risk nodes during geomagnetic storms invasion to permit timely disaster prevention measures to avoid voltage collapse under GMDs.
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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 | 0.001 | 0.002 |
| 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