Type-III Wind Power Plant Harmonic Emissions: Field Measurements and Aggregation Guidelines for Adequate Representation of Harmonics
Bibliographic record
Abstract
Large wind power plants (WPPs) based on variable speed turbines produce harmonics and interharmonics of voltage and current. This paper presents some generic guidelines about resulting harmonics and interharmonics at the high voltage point of interconnection (POI) of a type-III WPP. These guidelines are supported by both field measurements and time-domain electromagnetic transient (EMT) simulations. Specific focus is placed on how these harmonics and interharmonics can be represented in EMT simulation using detailed and aggregated models of a WPP. First, a theoretical explanation of the origin of all frequencies produced by a type-III wind generator (WG) is presented. The results of field measurements from a large WPP are then reported and analyzed confirming the theory. Subsequently, the field measurements are compared to simulation results of a detailed EMT model of the entire WPP and differences are explained. Finally, aggregated models of the same WPP are established and the accuracy of these aggregated models is discussed in light of the specific need of time-domain EMT studies that require adequate representation of harmonics.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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".