| 双回路接地距离保护的分析和整定 |
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| 引用本文： | 方天宇.双回路接地距离保护的分析和整定[J].电力系统保护与控制,2009,37(18):43-45. |
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| 作者姓名： | 方天宇 |
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| 作者单位： | 浙江电力调度通信中心，浙江 杭州310007 |
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| 摘 要： | 平行线路零序互感的存在，导致接地距离保护不能正确测量线路阻抗。在实际整定工作中，如何整定接地距离的补偿系数和可靠系数，整定规程没有给出具体的方法。分析了线路的实测阻抗，和高压电网在接地故障时电流分布的特点。基于不同系统运行方式,定性和定量地研究了零序互感对接地测量阻抗的影响，进而提出了接地距离保护一个简单实用的整定方法，具有普遍适用性。
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| 关 键 词： | 接地距离 零序互感 整定 |
Analysis and setting of ground distance relays on double circuit transmission lines |
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| FANG Tian-yu.Analysis and setting of ground distance relays on double circuit transmission lines[J].Power System Protection and Control,2009,37(18):43-45. |
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| Authors: | FANG Tian-yu |
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| Affiliation: | Zhejiang Power Dispatch and Communication Centre;Hangzhou 310007;China |
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| Abstract: | The existence of zero sequence coupling between parallel circuit is a cause that ground distance relay can not measure line impedance correctly.In the actual work setting,how to set the compensation factor and reliable factor for ground distance,setting guide does not give specific methods.This paper analyzes the measured line impedance and high-voltage power grid in the ground fault current distribution characteristics.Based on various operating modes of power system,qualitative and quantitative analysis o... |
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| Keywords: | ground distance relay zero sequence coupling setting |
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