电工电气
電工電氣
전공전기
ELECTROTECHNICS ELECTRIC
2014年
4期
43-45,55
,共4页
小电阻接地%备自投%应用
小電阻接地%備自投%應用
소전조접지%비자투%응용
small resistance grounding%spare automatic device%application
阐述了备自投装置工作的基本原则，并结合北仑电网小电阻接地方式的应用情况具体分析了备自投运行特点和工作原理，总结了两种小电阻接地方式对备自投实际运行的影响，明确了电源主变为 Y/Δ接线，接地变压器直接接于主变Δ线圈引线，其中性点经低电阻接地的方式是更为合理的接地方式，有效提高了电网供电可靠性。
闡述瞭備自投裝置工作的基本原則，併結閤北崙電網小電阻接地方式的應用情況具體分析瞭備自投運行特點和工作原理，總結瞭兩種小電阻接地方式對備自投實際運行的影響，明確瞭電源主變為 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閤理的接地方式，有效提高瞭電網供電可靠性。
천술료비자투장치공작적기본원칙，병결합북륜전망소전조접지방식적응용정황구체분석료비자투운행특점화공작원리，총결료량충소전조접지방식대비자투실제운행적영향，명학료전원주변위 Y/Δ접선，접지변압기직접접우주변Δ선권인선，기중성점경저전조접지적방식시경위합리적접지방식，유효제고료전망공전가고성。
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.
