| 引用本文: | 吴军基,杨敏,$2,张俊芳.暂态高频分量能量法小电流接地故障选线[J].电力自动化设备,2004,(6):14-17 |
| .Fault line detection using transient high frequency energy for small current grounding system[J].Electric Power Automation Equipment,2004,(6):14-17 |
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| 摘要: |
| 对单相接地故障选线原理的研究，多年来取得了很多成果，但是这些故障选线原理还不具备较高的可靠性和准确性。提出一种小电流接地系统故障选线的新方法，该方法用小波变换提取零序电流暂态信息，并依据故障后一定时段内零序电流暂态高频分量的能量进行故障选线。建立小电流接地系统单相接地故障仿真模型，仿真结果表明该方法对中性点不接地或中性点经消弧线圈接地系统均有效。 |
| 关键词: 小电流接地 故障选线 小波变换 零序电流：暂态高频分量 |
| DOI： |
| 分类号:TM711 TM773 |
| 基金项目: |
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| Fault line detection using transient high frequency energy for small current grounding system |
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WU Jun - ji YANG Min YANG Wei ZHANG Jun - fang
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| Abstract: |
| The research of fault line detection for small current grouding system has many productions,but none of their principles is of higher veracity and reliability.A new fault line detection method for small current grounding system is presented,which distills the transient information of zero sequence current by wavelet transformer,and detects the fault line according to the energy of transient high - frequency components within a short period after fault.The single phase - to - earth fault model of small current grounding system is built up,the simulation result shows that it is effective for NUS and NES. |
| Key words: small current grounding,fault line detection,wavelet transform,zero sequence cur - rent,transient high - frequency component |
