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电网技术  2007 

66kV配电网中性点经电阻接地的研究

, PP. 74-78

Keywords: 66,kV配电网,中性点经电阻接地,过电压

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Abstract:

66kV配电系统采用传统中性点接地方式时存在不足,文章提出了在某市中心66kV配电系统采用中性点经电阻接地的方式,并综合考虑过电压、继电保护、通信干扰等因素,利用Matlab仿真工具箱对采用该接线方式的配电系统进行了仿真分析,确定了中性点的接地电阻值,重点分析了中性点接地电阻值对弧光接地过电压的影响。结果表明,采用上述接地方式能有效抑制弧光接地过电压、保证继电保护装置的选择性、提高保护装置动作的灵敏性,具有一定的理论意义和工程实用价值。

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