Digital Control of PFC Rectifier with Combined Feedforward and PI Regulator
48th Annual Conference of the IEEE Industrial Electronics Society (IECON 2022): Proceedings 2022
Ievgen Verbytskyi, Andrei Blinov, Pietro Emiliani, Iļja Galkins

This paper presents an analysis of a method for controlling power factor correction (PFC) rectifiers to achieve unity power factor and high quality of the input current. The duty cycle estimation is based on a combination of two terms: feedforward and PI. The feedforward term is calculated with a digital model of the converter using input voltage, input current and reference current values. The PI term is then added to compensate for non-idealities of the model including factors, like digital and sensing delays. The analytical equations and characteristics of the proposed combined method are derived and the performance is compared with a standard PI regulator. The results demonstrate that the combined method features significantly better phase margin and can provide unity power factor and low total harmonic distortion (THD) for wide range of load conditions even with significant digital delay.


Keywords
Industrial electronics , Reactive power , Total harmonic distortion , Regulators , Rectifiers , Power factor correction , Mathematical models
DOI
10.1109/IECON49645.2022.9968509
Hyperlink
https://ieeexplore.ieee.org/document/9968509

Verbytskyi, I., Blinov, A., Emiliani, P., Galkins, I. Digital Control of PFC Rectifier with Combined Feedforward and PI Regulator. In: 48th Annual Conference of the IEEE Industrial Electronics Society (IECON 2022): Proceedings, Belgium, Brussels, 17-20 October, 2022. Piscataway: IEEE, 2022, pp.1-6. ISBN 978-1-6654-8026-0. e-ISBN 978-1-6654-8025-3. ISSN 1553-572X. e-ISSN 2577-1647. Available from: doi:10.1109/IECON49645.2022.9968509

Publication language
English (en)
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