Modeling and Implementation of a Module Integtrated Converter for Photovoltaic Systems

應用於光伏系統模組整合轉換器之建模與製作

張承恩(Cheng-en Chang)

指導教授 ： 潘晴財

國立清華大學/電機資訊學院/電機工程學系/碩士(2010年)

摘要

有鑑於全球受到能源安全、氣候變遷、與永續發展的挑戰，近年來有效的使用再生能源已成為全球矚目的焦點。在眾多的再生能源中，太陽能光伏系統在環境上與經濟效益上擁有較多的優勢相較於其他系統。為了有效利用太陽能資源,太陽能交流模組系統近期最被廣泛的研究與探討。所謂模組整合型轉換器即為能夠提供隨插即用的功能的直交流轉換器，如此太陽光能才能被最有效率的使用。
由於太陽能光伏模組具有低輸出電壓的特性，所以本論文提出一應用於建築整合型太陽光電系統高升壓型擬直流鏈模組整合轉換器。基本上，本論文主要貢獻總結如下所述。首先，針對建築整合型太陽光電系統提出一單級具電器隔離擬直流鏈模組整合轉換器以解決遮蔽效應的問題。藉由耦合電感特性以及低頻切換直交流轉換以提升本論文模組整合轉換器整體效率。除此之外，採用本實驗試所研發之太陽能最大功率追蹤技術達到瞬時最大功率控制。第二，藉由轉換器的直流與交流數學模型推導作為穩態分析與閉迴路補償的依據。最後，本論文實際製作一輸入電壓30V、輸出電壓110Vrms、額定功率150W的雛型系統。整體的轉換效率都高於88%以上。由模擬與實驗的結果驗證本論文所提轉換器的有效性。

關鍵字

交流模組 ； 模組整合轉換器 ； 擬直流鏈

並列摘要

In view of the global challenges of energy security, climate change, and sustainable development, exploring the renewable energy draws a lot of attention in recent years. Throughout a variety of the renewable energy technology, photovoltaic technology has more environmental and economic benefits than the others. In order to utilize the photovoltaic energy effectively, the AC-Module is a hot research topic in recent years. Basically, the so called Module Integrated Converter (MIC) involves the concept of an inverter which can provide a “plug and play” function and greatly optimize the energy yield.
Due to the low dc voltage level of a PV module, a high step-up MIC with pseudo dc link is proposed in this thesis for Building Integrated PV (BIPV) application. Basically, major contributions of this thesis can be summarized as follows. First, a single stage high step-up MIC with pseudo dc link and galvanic isolation is proposed for BIPV systems to solve the partial shading problem. By using coupling inductor technique and the line frequency switching inverter, the proposed MIC can achieve higher efficiency. Moreover, an instantaneous maximum power tracking control previously developed by this lab is adopted. Next, both dc and ac mathematical models of the proposed converter are derived for steady state analysis and close loop compensation. At last, a 150 watts 30V input 110Vrms output prototype is implemented. The overall conversion efficiency is more than 88% from full load to light load. Both simulation and experimental results indeed verify the effectiveness of the proposed converter.

並列關鍵字

AC Module ； Module Integrated Converter ； Pseudo dc link

參考文獻

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