Interleaved Flyback based micro-inverter for residential photovoltaic application in remote areas

This paper presents a design of a solar micro-inverter. Solar panels are connected through an Interleaved Flyback Converter(IFC), with a flyback transformer playing the role of isolation, and integrated with a full-bridge inverter to provide a 60 Hz, 120 V ac voltage to home loads in remote areas. The proposed interleaved flyback converter for a solar micro-inverter has four stages and is regulated using the voltage loop control and phase shift control. In the proposed interleaved flyback converter, the Resistor, Capacitor, and Diode (RCD) snubber circuit is used for each stage. The Direct-Quadrature (D-Q) rotating frame control is considered for the full-bridge inverter, since it provides good performance. The simulation and experimental results reported in this paper verify the functionality of the designed topology for a solar micro-inverter.

[1]  Min Chen,et al.  Digitally controlled active clamp interleaved flyback converters for improving efficiency in photovoltaic grid-connected micro-inverter , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[2]  Jianping Xu,et al.  Coupled-inductor boost integrated flyback converter with high-voltage gain and ripple-free input current , 2015 .

[3]  Dushan Boroyevich,et al.  A D-Q Frame Controller for a Full-Bridge Single Phase Inverter Used in Small Distributed Power Generation Systems , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[4]  Chung-Yuen Won,et al.  Photovoltaic parallel resonant dc-link soft switching inverter using hysteresis current control , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[5]  Subhashish Bhattacharya,et al.  Flux vector modulation for single-phase inverter with LC output filter , 2014, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014.

[6]  Zhaoan Wang,et al.  A novel output LC filter design method of high power three-level NPC converter , 2014 .

[7]  S. Sajadian,et al.  RCD snubber circuit design for 5-level 4-switch DC-AC converter , 2014, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society.

[8]  J.-J. Huselstein,et al.  Multicell Interleaved Flyback Using Intercell Transformers , 2007, IEEE Transactions on Power Electronics.

[9]  Roger Dougal,et al.  Optimized control of isolated residential power router for photovoltaic applications , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[10]  Thierry Meynard,et al.  Design of a 28 V-to-300 V/12 kW Multicell Interleaved Flyback Converter Using Intercell Transformers , 2010, IEEE Transactions on Power Electronics.

[11]  J.-J. Huselstein,et al.  Design of Intercell Transformers for High-Power Multicell Interleaved Flyback Converter , 2009, IEEE Transactions on Power Electronics.

[12]  A novel output LC filter design method of high power three-level NPC converter , 2014, 2014 International Power Electronics and Application Conference and Exposition.

[13]  Chung-Yuen Won,et al.  A New Control Strategy for Improving Weighted Efficiency in Photovoltaic AC Module-Type Interleaved Flyback Inverters , 2013, IEEE Transactions on Power Electronics.

[14]  Yi Zhao,et al.  High-Step-Up and High-Efficiency Fuel-Cell Power-Generation System With Active-Clamp Flyback–Forward Converter , 2012, IEEE Transactions on Industrial Electronics.

[15]  Ehsan Adib,et al.  Lossless passive snubber for half bridge interleaved flyback converter , 2014 .

[16]  C.-Y. Cheng,et al.  Analysis and implementation of an interleaved ZVS bi-flyback converter , 2010 .

[17]  B. C. Babu,et al.  Comparative study between unipolar and bipolar switching scheme with LCL filter for single-phase grid connected inverter system , 2012, 2012 IEEE Students' Conference on Electrical, Electronics and Computer Science.

[18]  Yong-Chae Jung,et al.  Interleaved active clamp flyback inverter using a synchronous rectifier for a photovoltaic AC module system , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[19]  Zhaoming Qian,et al.  A High Efficiency Flyback Converter With New Active Clamp Technique , 2010, IEEE Transactions on Power Electronics.