Harmonic current reduction for a pwm rectifier with very low carrier ratio in a microturbine system
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Bibliographic record
Abstract
When a PWM rectifier is connected to the generator in a microturbine power generation system to form a "back-to-back" configuration together with a grid-connected PWM inverter, the rectifier will have to operate with a very low PWM carrier ratio, since the generator output frequency can be as high as of kHz level while the switching frequency of semiconductors are limited. A method to reduce the distortion of the generator side currents in such a case is proposed, featuring a carrier factor of 5; a modified SPWM scheme to eliminate the 3/sup rd/ order harmonic and its multiples from the current spectrum; and an LC-resonance based notch filter to remove the remaining most significant harmonic component. Simulation results show that near perfect sinusoidal generator current can be obtained with this method.
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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 | 0.000 | 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