新型直流/交流電力轉換系統

A novel DC/AC power converter system

林鼎峰(Dean-Feng Lin)

指導教授 ： 吳晉昌

崑山科技大學/工程學院/電機工程研究所/碩士(2007年)

摘要

隨著石化能源價格不斷上升，再生能源的發展日益重要，本計畫將發展一小型再生能源與配電系統間之直流/交流轉換介面，該直流/交流轉換介面包含一直流/直流轉換器與一直流/交流轉換器，該直流/直流轉換器利用脈寬調變之控制使其輸出一整流弦波電流，該直流/交流轉換器作低頻切換將直流/直流轉換器輸出之整流弦波電流轉換成一弦波電流送回配電系統，由於直流/交流轉換器採用低頻切換，可有效降低其切換損失，提高整個系統效率，且不需直流/直流轉換器與直流/交流轉換器間之漣結電容，可提高直流/交流轉換介面之可靠度，本文中將建立一直流/交流轉換介面之雛型進行實測，由實測結果驗證本文所發展之直流/交流轉換介面確實具有預期之效果。

關鍵字

直流/直流轉換器 ； 直流/交流轉換器 ； 脈寬調變

並列摘要

The cost of fossil energy was rsien up, recently. This has promoted the importance of the renewable energy. A small capacity DC/AC power conversion interface for renewable energy will be developed in this thesis. This power conversion interface including a DC/DC power converter and a DC/AC power converter. The PWM modualtion strategy is used in the DC/DC power converter to generate a rectifier sinusoidal current. The DC/AC inverter, opaerated in the low switching frequency, converts the the rectifier sinusoidal current to a sinuoidal current and feeds to the utility. Because the DC/AC inverter is opaerated in the low switching frequency, it can reduce the switching loss. Hence, the power efficiency of the entire system can be increased. Moreover, the DC capacitor between the DC/DC power converter and the DC/AC inverter can be omited.This can increase the reliability of the DC/AC power conversion interface.　 A prototype is developed and tested to demonstrate the performance of the proposed DC/AC power conversion interface. The experimental results show that the proposed DC/AC power conversion interface has the expected performance.

並列關鍵字

DC/DC power converter ； pulse width modulation ； DC/AC power converter

參考文獻

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