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电网技术  2010 

GIS开关电弧建模及其对VFTO波形的影响

, PP. 200-205

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Abstract:

研究开关电弧对气体绝缘变电站(gasinsulatedsubstation,GIS)中产生的快速暂态过电压(veryfasttransientovervoltage,VFTO)波形的影响,对于确定GIS末端电压波形,及用于验证设备抵御VFTO的绝缘强度有重要意义。采用电阻模型来模拟电弧,并用电压源等效电弧电阻,既适用于各种电弧电阻模型,又可以简化开关的仿真建模。所得母线电压频域解为解析或半解析形式,有助于提高解的准确度。以双曲线形式的电阻模型为例,分析了开关电弧对GIS母线端VFTO波形的影响。该方法也适用于分析任意复杂GIS结构中开关电阻的影响。

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