本論文探討分散型風力發電發生孤島運轉時獨立運轉系統的電壓、頻率和電壓相位角變化現象。會有孤島運轉現象之原因為配電系統因某種原因造成供電端停止供電，使得分散型電源持續供電區域負載形成獨立供電區域。因孤島運轉會使供電品質的下降或是影響配電系統的安全，使得孤島運轉發生時必要予以快速偵測且加以排除。本文模擬分散型風力發電孤島運轉時產生的現象並建立現有文獻的偵測孤島運轉方法如過/欠電壓、過/欠頻率、頻率變化率、相位跳動、複合電壓變化率及功因變動和功率變化率偵測法並討論其偵測不感帶的範圍，及影響偵測範圍變動之因素，最後改善頻率變化率偵測因饋線上負載變動誤偵測為孤島運轉情形發生。

This thesis probes into the distributed type wind generations which happen the islanding operation systematic voltage, frequency and variation of voltage phase angle phenomenon. The reason why islanding phenomenon operation is that the end stop the power supply that the distribution system causes and supplies power because of a certain reason, regional load form and supply power in the area independently to make the distributed type power supply power continuously. Because the declining of quality or the security of the distribution system of the influence that the detached island will enable supplying power to operate, it is essential to detect and examine and get rid of fast while happening to make the detached island operate. Phenomenon produced while operating in simulation distributed type wind generation islanding of this text and setting up the detecting and examining the detached island to operate the method to over/ under voltage, over /under frequency, rate of change of frequency , phase shaft , compound the rate of change of the voltage and changes in power factors and rate of change of power. Discuss the range of non-detection zone and affect the range of non-detection zone factor. Improve the rate of change of frequency detection because of on-line load change that detect island situation by mistake to detect.

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