為了維護電力系統之可靠度、安全性及電力品質,併聯風力發電系統時必須仔細評估諸如:電壓調節、電壓閃爍及故障電流等之系統運轉衝擊項目。其中併聯於配電或輸電系統時之可靠度亦非常重要,故本篇論文利用故障樹分析軟體建構風力發電系統之故障樹並估算整體硬體設備之失能率,比較併接於配電與輸電系統之可靠度,最後提出相關討論與結論。 In order to maintain the reliability, safety, and power quality of power systems, the wind power generation integrated into the electrical distribution system should be carefully assessed the impacts on power system operations, such as voltage regulation, voltage flicker, fault current, etc. The reliability of the electrical power system connected with wind power generations is very important. For that, this thesis utilizes the fault tree analysis method to develop the fault tree of wind power generations for assessing the unavailability of the overall system and comparing the reliability of wind power generations connected with distribution and transmission system. Finally, this thesis summaries related discussions and conclusions.