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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/3742

    Title: 應用Meyer 小波轉換於分散式電源系統之獨立運轉檢測
    Authors: 謝承道
    Keywords: 分散式發電系統
    Meyer 小波轉換
    Dispersed power generation system
    Independent operation
    Meyer wavelet transform
    Date: 2007-10-29
    Issue Date: 2009-08-15 19:24:05 (UTC+8)
    Abstract: 分散式發電系統與市電並聯時,除了需考慮同步化技術外,其中最重要者,尚需考慮分散式電源獨立運轉現象的檢測。相較於傅立葉轉換,小波理論則架構了另一種訊號分析之模式,可更精確地觀測動態訊號之暫態行為。除此之外,由於訊號之時-頻資訊可同時由連續小波轉換掌握,在故障偵測及鑑別之效能,更受肯定。因此,本計畫即研究一新式分散式發電系統獨立運轉現象偵測法,並擬融合主動型與被動型偵測技術,以建構混合型獨立運轉檢測專用保護電驛,達到快速及正確檢知系統獨立運轉之目標。本計畫以Meyer小波轉換技術分別對電壓及頻率進行運算及解析,進而掌握市電運轉或解聯之狀態,以有助於相關保護控制對策之施行。Recently, due to the rapid decrease in fossil fuels,percentage of the installation of dispersed small-scaledgenerators is increasing. The dispersed units, such asbattery energy storage system, residential photovoltaicsystem, wind generation, and cogeneration, have beenoperated effectively in parallel with utility networks. Oneof critical concerns in the operation of grid-connecteddispersed power generation systems is the occurrence ofindependent operation. Wavelet theory provides a unifiedframework for signal processing applications. By thisway, the characteristics of non-stationary signal can bemore closely monitored. In this project, the Meyerwavelet transform combined with passive and activemethod is applied to detect the independent operation. AMeyer wavelet basis function will be embedded toensure the expected computational performance. Theproposed approach will be tested on various scenarios.From these test results, the feasibility and effectiveness of the approach are shown.
    Appears in Collections:[電機工程系所] 研究計畫

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