Title
A Single-Stage Microinverter Without Using Eletrolytic Capacitors
Abbreviated Journal Title
IEEE Trans. Power Electron.
Keywords
Flyback; microinverter; photovoltaic; power decoupling; PHOTOVOLTAIC APPLICATIONS; INVERTER; CONVERTER; INTERFACE; INPUT; Engineering, Electrical & Electronic
Abstract
This paper presents a new microinverter topology that is intended for single-phase grid-connected PV systems. The proposed microinverter topology is based on a flyback converter, where an extra switch is added to separate the decoupling capacitor from the PV Module, which allows for a high voltage and voltage ripples across its terminals. This results in reducing the power decoupling required capacitance. In this manner, long lifetime low power density film capacitors can be used instead of lifetime limited high power density electrolytic capacitors, resulting in remarkable increase of microinverter's lifespan. The main advantages of the proposed topology are summarized as: 1) eliminating the double-frequency power ripple using a small film capacitor; 2) using long lifetime film capacitors, which will improve the reliability of the inverter; and 3) requiring no additional circuitry to manage the transformer leakage energy. A 100-W microinverter prototype was built to verify the proposed topology. Experimental results show that the proposed topology and its control scheme can realize the power decoupling, while maintaining very good conversion efficiency numbers.
Journal Title
Ieee Transactions on Power Electronics
Volume
28
Issue/Number
6
Publication Date
1-1-2013
Document Type
Article
Language
English
First Page
2677
Last Page
2687
WOS Identifier
ISSN
0885-8993
Recommended Citation
"A Single-Stage Microinverter Without Using Eletrolytic Capacitors" (2013). Faculty Bibliography 2010s. 4115.
https://stars.library.ucf.edu/facultybib2010/4115
Comments
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