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  • 學位論文

電力品質訊號之頻譜分析及探討

Analysis of the spectrum for power quality signals

指導教授 : 謝承道
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摘要


由於科技不斷地進步,從傳統工業轉型成高科技產業,導致用電量隨之上升,所以供電品質與電力品質之可靠度極為重要,相對地,隨之衍生而來之電力品質問題便層出不窮。而引起電力品質之不良因素頗多,其中較為常見之因素為:電力諧波、電壓驟降、電壓閃爍、電壓陡昇、電壓中斷、三相不平衡、電壓突波與電流突波等,這些不良因素可能影響廠內設備之正常運轉,且對電機與電子設備造成破壞,甚至危害操作人員之安全。 本論文除使用短時傅立葉轉換(Short Time Fourier Transform,STFT)及一般性時-頻傅立葉轉換(Generalized Time-Bandwidth Product (GTBP) Optimal STFT)外,並針對上述兩方法之缺點,提出一修正型傅立葉轉換(Modified STFT)方法。而對數種不良電力品質訊號之模擬與探討,可驗證本論文所提之方法較其它方法具有更佳之準確性。

並列摘要


Because of the progress constantly of science and technology, it makes the transition from traditional industry into a high-tech industry. Therefore, this causes the rising of the power consumption, and the reliability of supply power quality is extremely important. Besides this, there are more and more problems about power quality. The bad factors which influence the power quality are quite many. They include harmonics, voltage sag, flickers, voltage swell, voltage interruption, three-phase unbalance, inrush voltage and inrush current. These bad factors may affect the normal operation of the equipment in the factory, and cause the damage of the electrical equipments, even endanger the operator security. In this thesis, besides using the Short Time Fourier Transform (STFT) and the Generalized Time-Bandwidth Product (GTBP) optimal STFT, the Modified STFT method to improve the shortcoming of the two above methods is proposed. The simulation and discussion of many kinds of power quality signals can demonstrate that the proposed method has better accuracy than other methods.

並列關鍵字

GTBP Modified STFT STFT

參考文獻


[1]王政偉,“結合小波轉換與類神經網路辨別電力開關之切換”,碩士論文,私立中原大學,2003。
[4]黃志軒,“以OPC為基礎的電力品質監測系統”,碩士論文,私立中原大學,2003。
[15]何碩俞,“應用基因演算法於配電系統饋線重組以降低電壓驟降”,碩士論文,私立中原大學,2002。
[16]徐維聰,“應用小波轉換與類神經網路進行電力系統故障種類之判別”,碩士論文,私立中原大學,2003。
[18]林文康,“通信機房電力諧波分析”,碩士論文,私立中原大學,2004。

被引用紀錄


王志松(2009)。利用雙核心提升快速傅立葉轉換效能〔碩士論文,崑山科技大學〕。華藝線上圖書館。https://doi.org/10.6828/KSU.2009.00066
郭吉明(2008)。應用分散式平行計算於諧波分析系統之建立〔碩士論文,崑山科技大學〕。華藝線上圖書館。https://doi.org/10.6828/KSU.2008.00026
承江永(2006)。結合小波轉換與類神經網路於偵測孤島效應之研究〔碩士論文,崑山科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0025-0306200810414639
黃俊智(2011)。配電系統非線性負載功率分量分析〔碩士論文,崑山科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0025-2204201116502800

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