本論文提出一種使用偽直流鏈技術的太陽能微型換流器(或稱為模組整合轉換器)，是種併網型的隔離式太陽能微型換流器。所研製之微型換流器擁有交流模組系統的優點，每一個太陽能面板模組搭配一個微型換流器，可單獨將每一個太陽能面板模組所發出的電能，高效率的轉移到市電電網。不會因為部分太陽能面板模組光電轉換效率較差，而拖累整個太陽能發電系統的發電效率，讓太陽能發電系統達到最佳化的電能轉換。又因使用偽直流鏈技術，電路在偽直流鏈上並不需要使用高耐壓的電解電容，進而使壽命明顯的延長。也因具偽直流技術的關係，本論文所提出的太陽能微型換流器，能更容易的實現高轉換效率和高準確度的最大功率追蹤。
　　本論文詳細的分析和討論電路的動作原理，並且經由數位信號處理器實現最大功率追蹤和交流電流迴路控制，最後建立一套最大功率250 W、30 V輸入、110/220 Vrms輸出的併網型電路雛形來驗證本論文架構的可行性。實驗結果證實，本論文的太陽能微型換流器轉換效率在各載皆有89%以上，最大功率追蹤準確度也都有99%以上。

　　This thesis mainly presents a solar micro-inverter (or called module integrated converter, MIC) with pseudo DC-link. It is a grid-tied isolated micro-inverter for photovoltaic (PV) systems. It has the advantages of an AC module system. The individual maximum power point tracking (MPPT) converter is attached to each PV panel for extracting its maximum power from PV side to grid side. It dosen’t have mismatching problem caused by different panel orientation or shadowing effects. High-voltage electrolytic capacitor is not needed and the lifetime of the studied micro-inverter can be then prolonged. High conversion efficiency and MPPT accuracy can be achieved with the studied pseudo DC-link topology.
　　In this thesis, the operation principles and design considerations for the studied solar micro-inverter are discussed and analyzed. To realize the MPPT and grid current control function, a digital signal processor (DSP) is used. Finally, a 250-W, 30-V input, and 110/220-Vrms output grid-tied laboratory prototype circuit is built and tested. The experimental results are shown to verify the feasibility of the proposed scheme. In the experimental verifications, the MPPT accuracy of the developed solar micro-inverter is around 99% while the measured efficiency can be up to 89% from light load to full load.

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