小電流接地系統(tǒng)單相接地保護(hù)選線方案的研究-wenkub
2022-09-11 13:59:48 本頁(yè)面
【正文】 ages, it has been applied to lowvoltage power grid in China. In actual production, the lowpressure line failure, more than 70% are singlephase ground fault, therefore, to find a select line of high accuracy of the protection device, still has a very important theoretical and practical value. This article mainly current system of small singlephase line selection method of analysis of the small current grounding fault transient algorithm and secure algorithm, and analyzed the wavelet analysis and its electric power system. Finally a simulation study. KEY WORDS： system with noneffectively earthed neutral； singlephasetoground fault；fault line selection； TYPE OF THESIS： application 目 錄 V 目 錄 摘 要 ...................................................................................................................................... II ABSTRACT ............................................................................................................................ III 目 錄 ...................................................................................................................................... V 1 緒論 ....................................................................................................................................... 1 課題研究背景與意義 ............................................................................................... 1 課題研究現(xiàn)狀 ........................................................................................................... 2 論文的主要內(nèi)容 ....................................................................................................... 3 2 小電流接地系統(tǒng)單相接地選線方法分析與探討 ............................................................... 5 小電流接地故障穩(wěn)態(tài)算法 ........................................................................................ 5 零序電流幅值比較法 ..................................................................................... 5 零序電流方向法 ............................................................................................. 5 諧波法 ............................................................................................................. 6 零序電流有功分量法 ..................................................................................... 6 負(fù)序電流法 ..................................................................................................... 6 零序?qū)Ъ{法 ..................................................................................................... 6 小電流接地故障暫態(tài)算法 ........................................................................................ 7 暫態(tài)零序能量法 ............................................................................................. 7 暫態(tài)零序相位法 ............................................................................................. 7 基于現(xiàn)代信號(hào)處理技術(shù)的故障選線算法 ................................................................ 7 3 多判據(jù)信息融合選線方法 .................................................................................................. 9 引言 ............................................................................................................................ 9 選線原理選擇 ............................................................................................................ 9 中性點(diǎn)不接地方式下選線原理選擇 ............................................................. 9 諧振接地方式下選線原理選擇 ..................................................................... 9 綜合選線方案 ......................................................................................................... 10 模糊選線 ..................................
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