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同杆双回线跨线接地故障的距离保护算法研究

, PP. 131-138

Keywords: 跨线接地故障,距离保护,同杆双回线,六序分量,电力系统

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Abstract:

提出了一种距离保护新算法来解决双回线跨线接地故障下的故障测距问题。该算法通过六序分量法分析同杆双回线跨线故障模型,相邻线路的零序电流可通过保护安装处的零序电流结合双回线的故障特性求得,以此消除线路耦合的影响。据此,实现了基于单端单回线电气量的距离保护方法。仿真结果表明,所提出的算法在发生金属性跨线接地故障时能准确计算出故障阻抗,优于现有基于单端单回线的距离保护算法。

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