配电网小电阻接地系统改造的特点及注意事项

Characteristics and Precautions of Small Resistance System Transformation in Distribution Network

随着社会经济的快速发展,城市规模的不断扩大,上海电网青浦地区电缆线路越来越多,接地电容电流日益增大,经消弧线圈的接地方式无法满足社会发展需要。主要讨论了上海青浦的电网发展及其小电阻改造项目,分析了中性点经小电阻接地系统特点,介绍了小电阻接地方式改造中的注意事项。

With the rapid development of economy and the continuous expansion of city scale, there are more and more cable lines in Qingpu District of Shanghai power grid, and the grounding capacitance current is increasing day by day. Therefore, the grounding mode through arc suppression coil cannot meet the needs of social development. This paper mainly discusses the development of Shanghai Qingpu power grid and its small resistance reconstruction project, analyzes the characteristics of small resistance grounding system through neutral point, and introduces the precautions in the reconstruction of small resistance grounding mode.