Novel PLL-less Control Strategy for Single-Phase Grid-connected Inverter Based on SOGI-CPT
Bibliographic record
Abstract
In this paper, a novel phase-locked loop less (PLL-less) control method for single-phase grid-connected inverters combining Second-Order Generalized Integrator (SOGI) and Conservative Power Theory (CPT) is proposed, which utilizes the CPT homo integral variable and SOGI for phase adjustment, thus replacing PLL for synchronous control of the inverter with the grid. By establishing the impedance model and analyzing the stability of different control strategies, it is shown that the proposed SOGI-CPT-based strategy can effectively improve the stability margin and stability bandwidth of the grid-connected inverter under wide-range grid impedance. Furthermore, the inverter can achieve robust stable operation under strong, weak, and even extremely weak grid conditions, solely by designing the appropriate parameter k of the SOGI-CPT control strategy. The effectiveness and impedance stability performance of the proposed grid-connected control strategy is verified by the simulation and experiments based on a hardware-in-the-loop simulation platform.
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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 | 0.000 | 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".