山东大学学报 (工学版) ›› 2021, Vol. 51 ›› Issue (1): 76-86.doi: 10.6040/j.issn.1672-3961.0.2020.416
刘远龙1,2,刘伟生2,王鹏玮3*,吴斌4,张恒旭1,徐丙垠3
LIU Yuanlong1,2,LIU Weisheng2,WANG Pengwei3*,WU Bin4,ZHANG Hengxu1,XU Bingyin3
摘要: 提出计算80 Hz以下频带内零序信号的有功功率系数,即固定时间窗内信号的有功功率与视在功率之比,根据有功功率系数的极性与绝对值可有效识别接地故障方向。数字仿真与实际故障录波数据验证了所提方法实现高阻接地保护的可行性,证明该方法可用于不稳定电弧与间歇性故障,能够避免电流互感器测量误差引起的误动问题。
中图分类号:
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