應用於光伏市電併聯系統之高增益降升壓型換流器

A High Gian Buck-Boost Typed Inverter for Photovoltaic Grid-Connection Systems

何冠翰(Kuan-Han Ho)

指導教授 ： 張健軒

義守大學/電機資訊學院/電機工程學系/碩士(2020年)

摘要

本文所提出之應用於光伏市電併聯系統之高增益降升壓型換流器，前級採用高增益升壓型直流-直流轉換器，結合後級全橋展開電路，開發出高增益降升壓型換流器。根據輸入電壓的大小，換流器可分別操作於降壓模式(Buck)或升壓模式(Boost)，以適用於廣域電壓輸入範圍的系統。使用數位訊號處理器dsPIC33FJ16GS504作為控制核心，可提供多組SPWM控制訊號以簡化電路複雜度。所提之換流器可分別以降壓型或升壓型原理操作，部分能量可以直接傳至輸出端，以提升轉換效率。由於換流器做單次能量處理，能有效減少切換損失。最後，針對所提之高增益降升壓型換流器製作1 kW的雛型電路，以電腦模擬結果與實驗量測結果作交互比對，來驗證所提之理論分析的正確性與電路架構的可行性。

關鍵字

高增益 ； 降升壓型 ； 換流器

並列摘要

This thesis proposes a high gain buck-boost typed inverter for photovoltaic grid-connected systems. This inverter is consisted of a high gain boost dc-dc converters and an H-bridge unfolding circuit. According to the levels of input-voltage, the proposed inverter can operate with buck-typed or boost-typed operation principle, which is suitable for the systems with a wide-range input voltage. The digital signal processor dsPIC33FJ16GS504 is used, to provide multiple sets of SPWM control signals, resulting in simplifying circuit complexity. Since the proposed inverter can operate with buck-typed or boost-typed operation principle, part of energy can directly be delivered to output terminal to improve efficiency. Due to inverter used independent mode operation, which can effectively reduce switching loss. Finally, 1kW prototype is fabricated for the proposed high gain buck-boost typed inverter. The simulated and experimental results are provided to verify the correctness of the theoretical analysis and the feasibility of the proposed inverter.

並列關鍵字

High gain ； Buck-boost ； Inverter

參考文獻

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