10kV配电网中性点不接地短路电流的分析.pdf
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第 36 卷 第 5 期 继电器 Vol.36 No.5
2008 年 3 月 1 日 RELAY Mar.1, 2008
10 kV 配电网中性点不接地短路电流的分析
顾秀芳
( 内蒙古工业大学电力学院,内蒙古 呼和浩特 010080)
摘要:传统的配电网故障分析中通常忽略了线路阻抗,给短路电流计算带来误差。文中充分考虑故障线路阻抗,利用对称分
量法分析中性点不接地配电网短路电流的计算方法,并讨论了影响短路电流的因素。通过理论及仿真实验得到故障点位置、
故障线路参数及负荷对短路电流有较大的影响。
关键词: 配电网; 中性点不接地; 短路电流; 对称分量法; 仿真
Analysis on short-circuit current of 10 kV distribution network with neutral point ungrounded
GU Xiu-fang
(School of Electrical Engineering, Inner Mongolia Industrial University , Hohhot 010080,China)
Abstract: Line impedance is neglected traditionally when fault analysis on distribution network is made, which bring about
difference for short-circuit current. Fault line impedance is fully taken into account in this paper, followed by discussion on some
factors that affect short-circuit current. Theoretical analysis and simulation test have proved that factors, such as location of the fault
point, parameter of faulted line , load and so on, have effects on short-circuit current to some extent.
Key words: distribution network; ungrounded neutral; short-circuit current; method of symmetrical components; simulation
中图分类号: TM77 文献标识码: A 文章编号: 1003-4897(2008)05-0014-05
C12 C13
0 引言 A
C n B
当前配电网采用的中性点运行方式有:不接 C23
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