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半波长输电线路潜供电弧弧根运动和熄灭特性实验研究

DOI: 10.13334/j.0258-8013.pcsee.2014.24.022, PP. 4171-4178

Keywords: 半波长输电,潜供电弧,物理模拟,弧根运动,熄灭时间

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Abstract:

潜供电弧是发展特高压半波长输电技术面临解决的关键问题之一。采用典型的特高压输电线路参数配置,通过计算仿真获得了半波长输电线路单相故障时潜供电流和弧后恢复电压梯度的分布规律。采用分布参数模型,通过对三相耦合电路的合理简化,给出了半波长线路潜供电弧物理模拟的单相等值实验拓扑。基于建立的物理模拟实验平台,获得了半波长线路潜供电弧的弧根弧柱运动图像和熄灭特性。实验发现半波长线路潜供电弧的阴极和阳极弧根运动具有明显的极性效应,并进一步分析了阴极和阳极弧根的运动机制与特征。实验指出,不同的补偿网络对半波长潜供电弧的熄灭特性影响较大,适当的补偿条件可使得潜供电弧的熄灭时间大为缩短。该研究工作可为发展特高压半波长输电线路潜供电弧的抑制技术提供参考依据。

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