Electromagnetic transient simulation of CIGRÉ DC grid test system with hybrid converter topologies
Bibliographic record
Abstract
Voltage source converter (VSC) based HVDC projects are being increasingly built and operated globally, providing the potential to construct a meshed DC supergrid. The CIGRÉ DC grid test system is a benchmark for research and analysis with power system topologies and parameters. This paper presents the electromagnetic transient simulation using detailed switching devices for the complete test system modeling composed of multiple converter topologies, including two-level (2L) converters, three-level neutral-point-clamped (3LNPC) converters, modular multi-level converters (MMCs) with up to 401 levels, and four-quadrant (4Q) DC-DC converters in PSCAD/EMTDC®. This paper proposes the scheme to combine the piecewise linearized tangential curve fitting of IGBT and diode characteristics with the Thévenin equivalence based MMC modeling scheme to increase the accuracy, which can also present the power losses of the IGBT modules. Dynamic analyses, including AC and DC faults, are conducted presenting the results from various converter stations.
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How this classification was reachedexpand
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 | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".