关于配电网中性点接地方式的探讨

从配电网内外过电压水平、供电可靠性、配电网的运行维护，以及我国的配电网结构特点等几方面分析、讨论了配电网主要采用的几种接地方式。采用配电网中性点对地绝缘方式简单、经济、供电可靠性较高，但只适合电网电容电流较小情况；采用中性点经小电阻接地方式防雷效果差但能有效抑制电网内过电压；采用中性点经自动消弧线圈接地方式防雷效果较好，能有效抑制弧光接地过电压．提高供电可靠性．但不能消去由断线引起的谐振．

Study on neutral grounding modes of distribution system

The main neutral grounding modes of power distribution system are discussed on over-voltage protection,power supply reliability,running and maintenance,characteristics of power distri-bution network. The non-grounding neutral point mode is simple,economical and reliable,which is suit for the power network with small capacitive current. The grounding neutral point mode via small resistance can effectively restrain over-voltage within power network,but its lightningproof capability is poor. The grounding neutral point mode via arc suppression coil is effective for lightningproof and arc-grounding over-voltage suppression,which improves power supply reliability,but it can't damp the resonance caused by broken line. This project is supported by National Natural Science Foundation of China(50207001).