贵州省10 kV城市配电网中性点接地方式

比较了配电网中性点采用小电流接地、经自动跟踪补偿消弧装置接地、经低电阻接地这3种常用的接地方式的优缺点。分析了贵州省10kV城市配电网的特点,并对贵州省中心城市主要变电站电容电流进行测试,提出了贵州省10kV城市配电网中性点宜采取经自动跟踪消弧装置接地的方式,指出了应用经自动跟踪消弧装置接地方式时必须注意的问题。实际运行结果表明在贵州省采用上述接地方式可大大提高当地的供电可靠性。

Neutral Grounding Mode of Urban Distribution Networks in Guizhou Province

By means of comparing three commonly used neutral grounding modes for distribution networks and according to the features of 10 kV urban distribution networks in Guizhou province and the testing results of capacitive current in main substations located in key cities of Guizhou Province,the authors propose that it is suitable for urban 10 kV distribution networks in Guizhou province to adopt the mode of neutral grounding via auto-turned Peterson coil.The feasible schemes for such grounding mode are researched and the problems to be paid attention to are pointed out while such grounding mode is adopted.Practical operation results show that using this grounding mode the power supply reliability can be evidently improved.