Discrete-Time Repetitive Control of Flyback CCM Inverter for PV Power Applications

In this paper, a discrete-time repetitive controller (RC) is proposed for a flyback inverter operating in continuous conduction mode (CCM), which has a simple structure, low cost, and high efficiency. Conventional controller results in poor control performance due to the effect of the right-half-pla...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2016-02, Vol.63 (2), p.976-984
Main Authors: Lee, Sung-Ho, Cha, Woo-Jun, Kwon, Bong-Hwan, Kim, Minsung
Format: Article
Language:English
Subjects:
Bandwidth
Closed loop systems
Control systems
Delays
Dynamical systems
Gain
Glass transition temperature
Harmonic analysis
Inverters
Low pass filters
low-pass filter
Module-integrated converter
phase-lead compensation
Rejection
Repetitive control
right-half-plane zero
Tracking
Tracking errors
Transfer functions
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Summary:In this paper, a discrete-time repetitive controller (RC) is proposed for a flyback inverter operating in continuous conduction mode (CCM), which has a simple structure, low cost, and high efficiency. Conventional controller results in poor control performance due to the effect of the right-half-plane zero in CCM operation. To achieve accurate tracking performance and disturbance rejection, the RC is developed and applied to the flyback inverter in CCM operation. In the RC scheme, a low-pass filter is used to allow tracking and rejection of periodic signals within a specified frequency range. A phase lead compensator is also used to compensate for the effect of the closed-loop system dynamics. The stability of the closed-loop system is derived, and the zero tracking error is achieved. Numerical simulations validated the proposed control approach, and experimental tests using a 200-W digitally controlled module-integrated converter prototype confirmed its feasibility.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2015.2477484