| 引用本文: | 罗 建,夏 豪,钟加勇,等.基于消弧线圈补偿特性的单相接地故障选线方法[J].电力系统保护与控制,2025,53(11):158-169.[点击复制] |
| LUO Jian,XIA Hao,ZHONG Jiayong,et al.A single-phase ground fault line selection method based on arc suppression coil compensation characteristics[J].Power System Protection and Control,2025,53(11):158-169[点击复制] |
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| 摘要: |
| 为解决消弧线圈补偿暂态特性等因素影响下的单相接地故障选线问题，提出基于消弧线圈补偿特性的单相接地故障选线方法。利用消弧线圈感性电流大于容性电流的情况下故障线路特有的消弧线圈掉相补偿特性，形成基于消弧线圈掉相补偿特性的选线方法。针对消弧线圈感性电流小于容性电流状况，利用故障线路电流幅值衰减程度大于非故障线路的消弧线圈衰减补偿特性，构成基于消弧线圈衰减补偿特性的选线方法。通过适应性仿真分析和现场案例分析表明：基于消弧线圈掉相补偿特性选线方法可实现单线选线，且不受零序电流互感器极性错误和高阻接地的影响。基于消弧线圈衰减补偿特性的选线方法也可单线选线且不受零序电流互感器极性错误的影响，但会受到高阻接地的影响。 |
| 关键词: 配网单相接地 消弧线圈补偿 故障选线 |
| DOI：10.19783/j.cnki.pspc.240144 |
| 投稿时间：2024-01-31修订日期：2024-12-13 |
| 基金项目:国家自然科学基金项目资助(51677011) |
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| A single-phase ground fault line selection method based on arc suppression coil compensation characteristics |
| LUO Jian1,XIA Hao1,ZHONG Jiayong2,ZHANG Lin2 |
| (1. School of Electrical Engineering, Chongqing University, Chongqing 400044, China; 2. State Grid Chongqing
Electric Power Research Institute, Chongqing 401123, China) |
| Abstract: |
| To address the challenges of single-phase ground fault line selection affected by transient characteristics of arc suppression coil compensation, a method based on the compensation characteristics of the coil is proposed. When the inductive current of the coil is greater than the capacitive current, the fault line exhibits a unique change-of-phase compensation characteristic. This is utilized to form a line selection method based on the change-of-phase compensation characteristic of the arc suppression coil. In situations where the inductive current of the coil is less than the capacitive current, the method leverages the attenuation compensation characteristic, where the current amplitude of the fault line decays more significantly than that of non-fault lines. Then a line selection method based on the attenuation compensation characteristic of the coil is constructed. Adaptive simulation and field case analyses show that the line selection method based on the change-of-phase compensation characteristic of the coil can realize single line selection, and is not affected by the polarity errors of the zero sequence current transformer and high-resistance grounding. The line selection method based on the attenuation compensation characteristic of the arc suppression coil can also identify a single fault line and is immune to polarity error of the zero sequence current transformer, though it is affected by high-resistance grounding. |
| Key words: distribution network single-phase grounding arc suppression coil compensation fault line selection |
