[1]张建宾,王俊诚,董　轩,等.增强接地感知的预调式消弧线圈阻尼电阻优化方法[J].郑州大学学报(工学版),2026,47(02):113-121.[doi:10.13705/j.issn.1671-6833.2026.02.019]
　ZHANG Jianbin,WANG Juncheng,DONG Xuan,et al.Optimisation Method for Pre-set Arc Suppression Coil Damping Resistors Enhancing Ground Fault Detection[J].Journal of Zhengzhou University (Engineering Science),2026,47(02):113-121.[doi:10.13705/j.issn.1671-6833.2026.02.019]
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增强接地感知的预调式消弧线圈阻尼电阻优化方法()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
47
期数:
2026年02期
页码:
113-121
栏目:
出版日期:
2026-02-13

文章信息/Info

Title:
Optimisation Method for Pre-set Arc Suppression Coil Damping Resistors Enhancing Ground Fault Detection
文章编号:
1671-6833(2026)02-0113-09
作者:
张建宾1;  王俊诚2;  董　轩1;  李景丽2;  张会杰3
1.国网河南省电力公司电力科学研究院,河南 郑州 450006;2.郑州大学 电气与信息工程学院,河南 郑州,450001;3.中建投工程技术有限公司,河南 郑州 450046
Author(s):
ZHANG Jianbin1;  WANG Juncheng2;  DONG Xuan1;  LI Jingli2;  ZHANG Huijie3
1.State Grid Henan Electric Power Research Institute, Zhengzhou 450006,China; 2.School of Electrical and Information Engineering,Zhengzhou University, Zhengzhou 450001, China; 3.Construction Investment in Engineering Technology Co., Ltd., Zhengzhou 450046,China
关键词:
谐振接地系统;  预调式消弧线圈;  阻尼电阻;  高阻接地故障;  中性点位移电压
Keywords:
resonant grounding system;  pre-set arc suppression coil;  damping resistor;  high impedance grounding fault;  neutral point displacement voltage
分类号:
TM475 TM743
DOI:
10.13705/j.issn.1671-6833.2026.02.019
文献标志码:
A
摘要:
阻尼电阻作为预调式消弧线圈的关键组件,现有设定方法偏重抑制串联谐振过电压和防止正常运行保护误动,导致高阻接地故障时中性点位移电压不易越过告警阈值,致使选线装置无法投入。为提升谐振接地系统的高阻接地感知灵敏度,首先,定量分析系统正常运行特性与高阻接地故障特征,以正常运行中性点位移电压不越限和高阻接地时其可靠告警为边界条件,推导串、并联阻尼电阻临界值的计算公式;其次,系统分析脱谐度、过渡电阻、系统不平衡度、电容电流等参数对临界值的影响,提出阻尼电阻的选取原则与方法;最后,针对某典型谐振接地系统高阻接地感知能力不足的问题,采用所提优化方法,将原15 Ω串联阻尼电阻调整为串联5.05 Ω或并联346.37 Ω电阻,优化后的阻尼电阻在有效抑制串联谐振过电压的同时,确保高阻接地故障时位移电压可靠越限,将系统耐过渡电阻能力提升至2.78 kΩ,且并联阻尼方式效果更优。该方法仅需利用消弧线圈常规在线监测数据即可实现,无须额外检测设备,具有较强的可行性与经济性。
Abstract:
As a key component of pre-set arc suppression coil, the damping resistor is currently configured primarily to suppress series resonance overvoltage and prevent protection maloperation during normal operation. This leads to difficulty in the neutralpoint displacement voltage exceeding the alarm threshold during high-resistance ground faults, resulting in the failure to activate the line selection device. To improve the sensitivity of resonant grounding systems in detecting high-resistance ground faults, the system′s normal operation characteristics and the behavior during high-resistance ground were quantitatively analyzed faults. Using the conditions that the displacement voltage should remain within limits during normal operation and reliably trigger an alarm during a high-resistance fault as constraints, calculation formulas was derived for the critical values of series and shunt damping resistors. Then the influence of parameters such as detuning degree, transition resistance, system unbalance, and capacitive current on these critical values were systematically examined, and principles and methods were proposed for selecting damping resistors. Finally, to address the insufficient detection capability for high-resistance ground faults in a typical resonant grounding system, optimization method proposed in this paper was applied. The original 15 Ω series damping resistor was replaced with either a 5.05 Ω series resistor or a 346.37 Ω shunt resistor. The optimized damping resistor effectively suppressed series resonance overvoltage while ensuring reliable exceedance of the displacement voltage during high-resistance ground faults, thereby increasing the system′s tolerance to transition resistance to 2.78 kΩ. The shunt damping configuration demonstrated better performance. This approach could be implemented using only routine online monitoring data from the arc suppression coil, requiring no additional detection equipment, and offers strong feasibility and cost-effectiveness.

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相似文献/References:

[1]李景丽,任俊跃,袁 豪,等.基于小波分析的配电网电弧接地故障选线方法[J].郑州大学学报(工学版),2023,44(05):69.[doi:10.13705/j.issn.1671-6833.2023.05.011]
　LI Jingli,REN Junyue,YUAN Hao,et al.Research on Arc Grounding Fault Selection Method of Distribution Network Based on Wavelet Analysis[J].Journal of Zhengzhou University (Engineering Science),2023,44(02):69.[doi:10.13705/j.issn.1671-6833.2023.05.011]

更新日期/Last Update: 2026-03-04