本論文旨在研製三相電能轉換器，搭配風渦輪機模擬器，應用於風能轉換系統。近年來風渦輪機容量，有朝大型風機的之趨勢，其輸出功率也越來越高，因此須發展適用於中高功率級的三相電能轉換器。一般風渦輪發電機的輸出電壓並不高，且具有時變之特性，本文的三相電能轉換器使用交流/直流/交流的電路架構，先透過升壓型電能轉換器將風渦輪發電機輸出穩定於一直流電壓，再使用三相變流器轉換為穩定的交流輸出。三相變流器可操作於獨立供電模式，使用電壓控制穩定輸出電壓，或是市電併聯模式，使用電流控制達到輸出功率的控制。本研究建構1kW級之三相電能轉換系統雛型，搭配風渦輪機模擬器進行實驗，於定風速及變動風速下，操作在獨立供電模式與市電併聯模式，驗證三相電能轉換器之功能與特性。

This thesis presents the implementation of a three-phase power converter for the wind energy conversion system(WECS). Over the past years, the wind turbine ratings have been increasing toward larger scale. It is necessary to develop a three-phase power converter for a higher rating of the WECS. Generally, output voltage of the wind turbine generator is not high and is varying with time. The proposed three-phase power converter uses the AC/DC/AC architecture. First, the boost converter provides a constant DC voltage which is used for the three-phase inverter to convert DC voltage into three-phase AC voltages. The three-phase inverter can operate in the stand-alone mode using voltage-control for stabilizing output voltage or the grid-connected mode using current-control for controlling the power. Laboratory prototype of the three-phase power conversion system is built. Experimental tests are made using a wind turbine emulator. The three-phase power converter functions and characteristics are evaluated in stand-alone mode and in grid-connected mode under constant and various wind speed conditions.

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