本論文提出一具諧波注入機制之單開關三相式風能轉換器。在風力發電系統中，為了使風力發電機在不同風速下皆可操作在最大功率點上，因此需要一最大功率追蹤機制。再藉由一傳統單開關三相功率因數修正電路以提升功率因數。然而，傳統單開關三相功率因數修正電路之輸入電流具有較高的五次諧波成分，造成功率因數降低。
本論文提出一最大功率追蹤機制應用於傳統單開關三相功率因數修正電路上，使風力發電機在不同風速下皆可操作在最大功率點上。並搭配諧波注入機制，改善單開關三相轉換器之功率因數，提升風力發電系統之電能轉換效率。
最後，實作一1kW 雛型電路，以驗證本計畫所提之最大功率追蹤控制法，可使風力發電機之輸出功率操作在最大功率點。並藉由諧波注入機制，減少輸入電流五次
諧波成分，提升單開關三相轉換器之功率因數，實現一具最大功率追蹤控制與高功率因數之風能轉換器。

This thesis presents design and implementation of the single-switch three-phase wind power converter with harmonic injection mechanism. In order to obtain optimal output power of the wind turbine generator (WTG) at different wind speeds, a maximum-power-point-tracking (MPPT) mechanism is required. Furthermore, to improve the input power-factor of the wind energy conversion system (WECS), the conventional
single-switch three-phase boost rectifier is employed. However, the input current of the conventional single-switch boost rectifier exhibits a relatively large fifth-order harmonic, which leads to low input PF.
Therefore, in order to improve the conversion efficiency for WECS, a MPPT mechanism is employed and proposed in the single-switch three-phase boost rectifier. Moreover, the input fifth-order harmonic current of the single-switch boost rectifier can be reduced by adopting the harmonic injection mechanism.
Finally, a 1kW prototype circuit of the single-switch three-phase wind power converter is built to verify the performances using MPPT and harmonic injection
mechanisms.

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