Analysis and Design of a Three-port Flyback Inverter using an Active Power Decoupling Method to Minimize Input Capacitance

Jun-Gu Kim; Kyu-Dong Kim; Yong-Su Noh; Yong-Chae Jung; Chung-Yuen Won

Analysis and Design of a Three-port Flyback Inverter using an Active Power Decoupling Method to Minimize Input Capacitance

Vol. 13, No. 4, pp. 558-568, Jul. 2013

10.6113/JPE.2013.13.4.558

Active power decoupling

Three-port flyback inverter

Film capacitor

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Abstract

In this paper, a new decoupling technique for a flyback inverter using an active power decoupling circuit with auxiliary winding and a novel switching pattern is proposed. The conventional passive power decoupling method is applied to control Maximum Power Point Tracking (MPPT) efficiently by attenuating double frequency power pulsation on the photovoltaic (PV) side. In this case, decoupling capacitor for a flyback inverter is essentially required large electrolytic capacitor of milli-farads. However using the electrolytic capacitor have problems of bulky size and short life-span. Because this electrolytic capacitor is strongly concerned with the life-span of an AC module system, an active power decoupling circuit to minimize input capacitance is needed. In the proposed topology, auxiliary winding defined as a Ripple port will partially cover difference between a PV power and an AC Power. Since input capacitor and auxiliary capacitor is reduced by Ripple port, it can be replaced by a film capacitor. To perform the operation of charging/discharging decoupling capacitor Cx, a novel switching sequence is also proposed. The proposed topology is verified by design analysis, simulation and experimental results.

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Cite this article

[IEEE Style]

J. Kim, K. Kim, Y. Noh, Y. Jung, C. Won, "Analysis and Design of a Three-port Flyback Inverter using an Active Power Decoupling Method to Minimize Input Capacitance," Journal of Power Electronics, vol. 13, no. 4, pp. 558-568, 2013. DOI: 10.6113/JPE.2013.13.4.558.

[ACM Style]

Jun-Gu Kim, Kyu-Dong Kim, Yong-Su Noh, Yong-Chae Jung, and Chung-Yuen Won. 2013. Analysis and Design of a Three-port Flyback Inverter using an Active Power Decoupling Method to Minimize Input Capacitance. Journal of Power Electronics, 13, 4, (2013), 558-568. DOI: 10.6113/JPE.2013.13.4.558.