| 550kV全封闭组合电器快速暂态过电压影响因素分析 |
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| 引用本文： | 林莘,庚振新,徐建源,田驰.550kV全封闭组合电器快速暂态过电压影响因素分析[J].电网技术,2009(19). |
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| 作者姓名： | 林莘 庚振新 徐建源 田驰 |
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| 作者单位： | 沈阳工业大学电气工程学院; |
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| 基金项目： | 教育部高等学校科技创新工程重大项目培育资金(707018); 辽宁省教育厅项目(2006R40,2008T134) |
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| 摘 要： | 分析了550kV全封闭组合电器(gas insulated switchgear,GIS)中隔离开关(disconnector,DS)操作时产生快速暂态过电压(very fast transient overvoltage,VFTO)的影响因素,提出了抑制GIS系统中VFTO的方法。以董箐水电站为研究背景,根据550kVGIS结构及运行特点,在计算了隔离开关7种操作方式下VFTO的基础上,分析了VFTO对变压器绝缘的危害与对避雷器计数器的影响以及残余电荷电压和合闸电阻对VFTO幅值与频率的影响。针对在建的特高压输变电系统,提出了抑制VFTO的措施,可为特高压GIS设备的生产与运行提供参考。
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| 关 键 词： | 全封闭组合电器 快速暂态过电压 隔离开关 变压器绝缘 避雷器 |
Analysis on Factors Impacting Very Fast Transient Overvoltage in 550 kV GIS |
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| LIN Xin,GENG Zhen-xin,XU Jian-yuan,TIAN Chi.Analysis on Factors Impacting Very Fast Transient Overvoltage in 550 kV GIS[J].Power System Technology,2009(19). |
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| Authors: | LIN Xin GENG Zhen-xin XU Jian-yuan TIAN Chi |
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| Affiliation: | LIN Xin,GENG Zhen-xin,XU Jian-yuan,TIAN Chi(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110078,Liaoning Province,China) |
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| Abstract: | The factors impacting the very fast transient overvoltage(VFTO) caused by the operation of disconnector in 500kV gas insulated switchgear(GIS) are analyzed, and an approach to suppress VFTO in GIS is given.Taking the 550kV GIS installed in a certain hydropower station in China as research background and according to structure and operational features of this 550kV GIS, on the basis of calculating VFTO under seven kinds of operation modes, the damage of VFTO to transformer insulation and its influence on sur... |
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| Keywords: | gas insulated switchgear(GIS) very fast transient overvoltage disconnector transformer insulation surge arrester |
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