有關中性點經(jīng)小電阻接地方式在運行中存在問題分析(黃)-展示頁
2025-04-03 03:53本頁面
【正文】 nce analysis of the overhead line insulator flashover caused by instantaneous fault and overhead insulated wire break ground on the influence of zero sequence the conclusion: the cause of the small resistance grounding mode led to the decrease of the power supply reliability is overhead line insulator flashover fault current is large enough to start the zerosequence protection,in overhead insulated conductor break ground, because the ground point grounding resistance congress to make zerosequence protection failure.So small resistance grounding method applies only to pure cable network, is not suitable for overhead line or aerial cable hybrid network.Key words: Small resistance grounding method。因而小電阻接地方式僅適用于純電纜網(wǎng)絡，不適用于架空線路為主或架空電纜混合網(wǎng)。關于配電網(wǎng)中性點經(jīng)小電阻接地方式的分析李景祿李政洋張春輝2 湖南長沙410076 湖南長沙（410076）摘要：本文對配電網(wǎng)中性點小電阻接地方式、對鐵磁諧振過電壓的消除、對弧光接地過電壓的限制及對電網(wǎng)的適用性進行了分析。分析了小電阻接地方式故障點的接地阻抗對零序保護的影響，特別對比分析了架空線路絕緣子閃絡造成的瞬時性故障和架空絕緣導線斷線接地時對零序保護的影響，認為：小電阻接地方式使供電可靠性下降的原因是架空線路絕緣子閃絡時故障電流大，足以啟動零序保護，而在架空絕緣導線斷線接地時由于接地點接地電阻大會使零序保護“失靈”。關鍵詞：小電阻接地方式、單相斷線、過渡電阻接地、人身安全Analysis of Neutral Point via Small Resistance Grounding Method Of Distributi
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