北侖電網小電阻接地方式下備自投應用分析
王丁1，彭蛟2
1 國網寧波供電公司，浙江 寧波 315800； 2 國網寧海縣供電公司，浙江 寧波 315600
摘 要：闡述了備自投裝置工作的基本原則，并結合北侖電網小電阻接地方式的應用情況具體分析了備自投運行特點和工作原理，總結了兩種小電阻接地方式對備自投實際運行的影響，明確了電源主變為Y/Δ接線，接地變壓器直接接于主變Δ線圈引線，其中性點經低電阻接地的方式是更為合理的接地方式，有效提高了電網供電可靠性。
關鍵詞：小電阻接地；備自投；應用
中圖分類號：TM762.1 文獻標識碼：B 文章編號：1007-3175(2014)04-0043-03
Application and Analysis of Spare Automatic Device of Beilun Power Network under Small Resistance Grounding Method
WANG Ding1, PENG Jiao2
1 State Grid Ningbo Power Supply Company, Ningbo 315800, China;
2 State Grid Ninghai Power Supply Company, Ninghai 315600, China
Abstract: Description was made to the basic working principal of spare automatic device. Combined with application situation of the small resistance grounding method of Beilun power network, this paper analyzed the spare automation device operation characteristics and working principle, summarizing impacts of two kinds of small resistance grounding methods on spare automatic device operation and determining the main transformer of power supply to be in Y/Δ wiring and grounding transformer to be directly connected to the lead of main transformerΔwinding, of which its neutral point via small resistance grounding method was more reasonable grounding method, so as to effectively lift power network power supply reliability.
Key words: small resistance grounding; spare automatic device; application
參考文獻
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