本論文主旨為研製類比控制之併網型微型換流器，利用功率因數控制電路控制換流器之輸出為弦波電流，並使用最大功率追蹤控制電路擷取太陽能模組之最大功率。本論文首先探討邊界導通模式之功率因數校正電路與換流器電路的對偶性，並將功率因數校正電路之設計概念應用於換流器電路。但因邊界導通模式功因校正控制電路控制返馳式換流器，會導致較高成分之三次諧波，因此本論文利用電路模擬軟體模擬注入三次諧波以改善輸出電流之總諧波失真比例。最後，以邊界導通控制模式功因校正晶片搭配返馳式架構研製一併網型微型換流器，以驗證所提方法之可行性。其中太陽能板的輸出為20V~40V/300Wpk，輸出為220Vac/60Hz，此換流器系統最高效率為92.8%。

In this thesis, a photovoltaic (PV) gird-connected micro-inverter controlled by power factor correction (PFC) controller is implemented. The PFC controller is adopted to control output sinusoidal current of an inverter. Besides, the maximum power point tracking control circuit can retrieve the maximum power form PV modules. The duality between the PFC circuit and the inverter circuit is first presented. Accordingly, the PFC design rules is applied in the inverter circuit. However, the flyback inverter controlled by boundary conduction mode PFC IC will cause a high third harmonic component from the analysis. Hence, the third harmonic injection method is adopted by simulation software to improve the output current total harmonic distortion. Finally, a 300W grid-connected flyback micro-inverter with boundary conduction mode control based on L6561 PFC controller is implemented to verify the feasibility. Input voltage is 20V to 40V and the peak power is 300 W from PV simulator, and the output voltage is 220Vac/60Hz. The highest efficiency of the micro-inverter is 92.8%.

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