這是一個屬於電力電子的新世代。從眾多關鍵的議題可見電力電子的扮演的重要角色，如自然資源的短缺、居高不下的油價、越來越多關於抑制二氧化碳排放的政府議題。這些議題都顯示出未來電力電子在這世代扮演前瞻性的一角。而其中太陽能為自然資源重要的一環，其系統通常要求要二十年以上的壽命，因此如何提高並增加轉換器的效率，為值得關心與探究的議題。
本篇論文針對兩個問題做深入探究，如何提高控制的準確性以及提升整體轉換器的操作效率。對於控制部分將會深入探究與比較同步框與靜止框轉換下的情況，另外針對消除直流端二次諧坡的方法也會提出與驗證。最後對於整體的效率提升方法，以及功率損耗的分析將會作深入的探討與模擬，並有實驗量測結果來驗證效率提升之方法。

This age is the opening and prosperous age of power electronic technology. The issue of nature resource shortage, Getting-high oil prices and more and more government policy for prohibiting CO2 emission are the evidence. In these sustainable energy resources, solar power plays a very crucial and important role. Usually the lifetime of photovoltaic grid-connected system requires 20+ years of life time. How to increase the lifetime and Higher the efficiency of overall converter is very crucial issue because the power from the photovoltaic panel is extremely valuable.
There are two main purposes for this thesis, increasing control performance and the overall operation efficiency of single-phase converter which is suitable for the usage for photovoltaic power. In this thesis the control methodology is going to show in detail. The more accurate synchronous frame control method is proposed. Also, the method for eliminating the twice oscillating power on the gird-connected system under boost based power decoupling circuit is also shown. Final part is showing the efficiency improvement procedure in order to higher the efficiency even under adding power decoupling circuit.

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