| 引用本文: | 郑涛,高小芊,杨国生.地磁感应电流在三相电力变压器绕组中的流通路径分析[J].电力自动化设备,2017,37(2): |
| ZHENG Tao,GAO Xiaoqian,YANG Guosheng.Analysis of GIC flow path in windings of three-phase power transformer[J].Electric Power Automation Equipment,2017,37(2): |
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| 摘要: |
| 通过构建计及地磁感应电流(GIC)影响的交流系统仿真模型，研究了在不同运行条件下，GIC在Yg-Y接线与Yg-△接线变压器中GIC流通路径的特征。研究结果表明，在变压器三相绕组不对称饱和情况下，GIC 在变压器三相绕组中非均匀分布，同时由于GIC的低频变化特征，GIC可能传变至变压器Y(△)侧，对继电保护系统的可靠运行产生影响。 |
| 关键词: 电力变压器 直流偏磁 地磁感应电流 流通路径 |
| DOI：10.16081/j.issn.1006-6047.2017.02.016 |
| 分类号:TM41 |
| 基金项目: |
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| Analysis of GIC flow path in windings of three-phase power transformer |
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ZHENG Tao1, GAO Xiaoqian1, YANG Guosheng2
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1.State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2.China Electric Power Research Institute, Beijing 100085, China
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| Abstract: |
| A simulation model of AC system with GIC(Geomagnetically Induced Current) is built and the GIC flow paths in the windings of three-phase transformer under different operating conditions are studied for Yg-Y and Yg-△ connection modes respectively. Results show that, GIC is not evenly distributed in three phase windings during the asymmetrical saturation, and due to the low-frequency variation, GIC may flow to the Y-side in Yg-Y connection mode or the △-side in Yg-△ connection mode, influencing the reliable operation of protection system. |
| Key words: power transformers DC bias geomagnetically induced current flow path |
