基于故障相电压极化量的谐振接地系统高阻故障方向检测方法
针对谐振接地系统高阻接地故障的发生概率大、零序电压检测难度高的问题,提出了基于故障相电压极化量的谐振接地系统高阻故障方向检测方法.利用谐振接地系统高阻故障等值电路,分析了故障暂态时间内故障相电压分别与故障上、下游线路零序电流的极性关系,发现故障相电压与故障上游线路零序电流波形相似程度较高,与下游线路零序电流波形相似程度较低.据此,可以将故障相电压作为极化量,通过分析故障暂态时间内线路检测点所测零序电流与故障相电压的相似程度来进行故障方向检测.相较于以往的故障检测方法,所述方法提高了谐振接地系统高阻接地故障检测的可靠性.数字仿真与现场人工试验验证了该方法的可行性....
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Published in | 电力系统保护与控制 Vol. 48; no. 23; pp. 73 - 81 |
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Main Authors | , , |
Format | Journal Article |
Language | Chinese |
Published |
中国石油大学(华东)新能源学院,山东 青岛 266580%山东理工大学智能电网研究院,山东 淄博 255049
01.12.2020
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Subjects | |
Online Access | Get full text |
ISSN | 1674-3415 |
DOI | 10.19783/j.cnki.pspc.200020 |
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Abstract | 针对谐振接地系统高阻接地故障的发生概率大、零序电压检测难度高的问题,提出了基于故障相电压极化量的谐振接地系统高阻故障方向检测方法.利用谐振接地系统高阻故障等值电路,分析了故障暂态时间内故障相电压分别与故障上、下游线路零序电流的极性关系,发现故障相电压与故障上游线路零序电流波形相似程度较高,与下游线路零序电流波形相似程度较低.据此,可以将故障相电压作为极化量,通过分析故障暂态时间内线路检测点所测零序电流与故障相电压的相似程度来进行故障方向检测.相较于以往的故障检测方法,所述方法提高了谐振接地系统高阻接地故障检测的可靠性.数字仿真与现场人工试验验证了该方法的可行性. |
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AbstractList | 针对谐振接地系统高阻接地故障的发生概率大、零序电压检测难度高的问题,提出了基于故障相电压极化量的谐振接地系统高阻故障方向检测方法.利用谐振接地系统高阻故障等值电路,分析了故障暂态时间内故障相电压分别与故障上、下游线路零序电流的极性关系,发现故障相电压与故障上游线路零序电流波形相似程度较高,与下游线路零序电流波形相似程度较低.据此,可以将故障相电压作为极化量,通过分析故障暂态时间内线路检测点所测零序电流与故障相电压的相似程度来进行故障方向检测.相较于以往的故障检测方法,所述方法提高了谐振接地系统高阻接地故障检测的可靠性.数字仿真与现场人工试验验证了该方法的可行性. |
Author | 薛永端 徐丙垠 管廷龙 |
AuthorAffiliation | 中国石油大学(华东)新能源学院,山东 青岛 266580%山东理工大学智能电网研究院,山东 淄博 255049 |
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Author_FL | XUE Yongduan GUAN Tinglong XU Bingyin |
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Keywords | 谐振接地系统 相电压 极化量 方向检测方法 高阻故障 |
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Title | 基于故障相电压极化量的谐振接地系统高阻故障方向检测方法 |
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