Stability and performance assessment of single-phase T/4 PLLs with secondary control path in current sensorless bridgeless PFCs

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URI: https://hdl.handle.net/10902/38312
ISSN: 2168-6777
ISSN: 2168-6785
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Autoría
Lamo Anuarbe, Paula; López Vidal, FelipeAutoridad Unican; Pigazo López, AlbertoAutoridad Unican; Azcondo Sánchez, Francisco JavierAutoridad Unican
Fecha
2018-06
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© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2018, 6(2), 674-685
Editorial
Institute of Electrical and Electronics Engineers
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Palabras clave
Bridgeless
Converter
Feedback
Phase-locked loop (PLL)
Secondary control path
Sensorless
Stability
Synchronization
T/4
Resumen/Abstract
Bridgeless power factor correction (PFC) stages and the associated current shaping techniques require grid synchronization to ensure unity displacement power factor. In controllers with no current sensor, line current rebuilding algorithms are especially sensitive to synchronization issues. Phase-locked loops (PLLs) are used to synchronize the control of grid-connected converters, and may include a secondary control path to improve their dynamics in the case of grid disturbances. This paper presents linear models of T/4 PLLs with secondary control paths. The T /4 PLL structures are digitized and their performance evaluated. The stability conditions are determined. The PLL signal is utilized for current sensorless bridgeless PFCs, in the current estimation algorithm to reduce the estimation error, and as the reference in the current controller. The effect of the response of different PLLs on the PFC under grid disturbances is evaluated experimentally.
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