南方电网技术2026，Vol.20Issue(5)：136-144,9.DOI:10.13648/j.cnki.issn1674-0629.2026.05.014
10 kV配电线路单相树线故障零序电压变化特性
Zero Sequence Voltage Variation Characteristics of Single-Phase Tree Line Fault in 10 kV Distribution Line
摘要
Abstract
In order to study the characteristics of zero sequence voltage signal change during tree line fault,an experimental platform for tree line fault is built to study the zero sequence voltage variation characteristics when single-phase tree line ground fault occurs in different vegetation under different residual currents in the resonant grounding system.The change stages and laws of the zero sequence voltage are summarized and the influence laws of the residual currents and vegetation's own parameters are analyzed on the change of the zero sequence voltage.Based on this,the prediction model for the peak value of the zero sequence voltage is built.The experimental results show that the development process of tree line fault can be expressed by the zero sequence voltage variation,which typically exhibit four stages:slow increase,rapid increase,decline and recovery.The trend of these changes follows three types of curves:U-shaped,J-shaped,and V-shaped.The increase of residual current will lead to a decrease in the amplitude of the zero sequence voltage change,which is not conducive to the detection of faults,and its value should be compensated to the range of 0～1 A as much as possible.For the same kind of vegetation,the peak zero-sequence voltage is positively correlated with the water content and diameter,and the peak time is negatively correlated with both of them.The structural difference of different kinds of vegetation is also the key to influence the peak zero-sequence voltage and peak time.The results of this study are of great significance for the detection and early warning of hill fires caused by tree line faults.关键词
配电线路/树线故障/单相接地/零序电压/变化特性Key words
distribution line/tree line fault/single-phase grounding/zero sequence voltage/variation characteristics分类
信息技术与安全科学引用本文复制引用
辜弘,王政,杨皓涵,杨淳岚,陈天翔,邵千秋..10 kV配电线路单相树线故障零序电压变化特性[J].南方电网技术,2026,20(5):136-144,9.基金项目
国家自然科学区域创新发展联合基金重点支持项目(U19A2080) （U19A2080）
四川省科技计划支持项目(2023NSFSC0830) （2023NSFSC0830）
四川省电力公司科技项目(521903230001). Supported by the Key Support Project of the National Natural Science Regional Innovation and Development Joint Fund(U19A2080) （521903230001）
Sichuan Provincial Science and Technology Program(2023 NSFSC0830) （2023 NSFSC0830）
the Science and Technology Project of Sichuan Electric Power Company(521903230001). （521903230001）
