首页|基于面积差法的小电阻接地配电网系统单相故障选线研究

基于面积差法的小电阻接地配电网系统单相故障选线研究

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针对小电阻接地配电网系统单相故障频发,易影响系统安全稳定运行的问题,提出了一种基于零序电流面积差法的选线方式.首先通过分析零序电流的故障特征,得出在故障线路与非故障线路上零序电流变化方向相反;其次利用零序电流方向相反的特征,构造了线路两两对比的面积差法,并经归一化处理得到了故障选线矩阵;最后利用MATLAB/Simulink搭建10kV小电阻接地配电网系统进行仿真验证,结果表明该方法能够准确选线,且具有一定的抗过渡电阻能力.
Area Difference Method-based Single-phase Faulty Line Determination in Small Resistance Grounding Distribution Network Systems
A line determination method based on zero sequence current area difference method was proposed to address the frequent occurrence of single-phase faults affecting safe and stable operation in small resistance grounding distribution net-work systems.First by analyzing the fault characteristics of zero sequence current,it was found that the directions of change of zero sequence current on faulty and non-faulty lines were opposite.Second an area difference method enabling one-on-one comparison between two lines was constructed based on the aforementioned characteristic,and the faulty line determining matrix was obtained through normalization processing.Finally a simulative test on a 10 kV low resistance grounding distribution network system built by MATLAB/Simulink verified the satisfactory effectiveness in determining faulty line and a certain tolerance to transition resistance with respect to the proposed method.

single phase faultarea difference methodzero-sequence currentfaulty line determining matrix

吴剑飞、刘源、冷婷婷、韩超

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国网浙江省电力有限公司常山县供电公司,浙江 衢州 324000

国网重庆市电力有限公司潼南供电分公司,重庆 402660

单相故障 面积差法 零序电流 故障选线矩阵

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(11)