A variable switching frequency algorithm to improve the total efficiency of single-phase grid-connected inverters
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Bibliographic record
Abstract
The selection of an optimal switching frequency of pulse width modulation (PWM) for single-phase inverters is one of the most effective ways to improve the inverters' efficiency. However, the lower switching frequency results in the higher harmonic voltage and current. For grid- connected inverters, the harmonic current distortion is significantly affected by the switching frequency. Therefore, the choice of switching frequency is usually considered as a tradeoff between lowering the total demand distortion (TDD) of output current and reducing the switching losses. In this paper, a variable switching frequency algorithm that changes the carrier frequency of a modified space vector pulse width modulation (SVPWM) control in real time based on different operating conditions is developed to improve the overall efficiency of the inverter while meeting a TDD requirement specified in IEEE Standard 1547. The performance of the proposed algorithm is verified by both Matlab-based simulation and experiments conducted on a 12kw single-phase inverter.
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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