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-  2018 

环结构短空气间隙工频击穿电压预测研究 Study of prediction of power frequency breakdown voltage of ring structure short air gaps

Keywords: 环结构空气间隙,典型电极空气间隙,击穿电压,支持向量机,电场特征参数

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Abstract:

外绝缘特性是高压输变电工程设计和运行时重点关注的问题,其基本依据则是空气间隙的击穿特性,应用人工智能算法获取空气间隙击穿电压是外绝缘研究的新方向之一.因此,提出了一种利用典型电极间隙击穿电压预测复杂间隙击穿电压的方法,该方法基于电场特征参数和支持向量机理论,通过有限元法计算空气间隙的电场分布,从中提取电场特征参数,用以表征间隙的几何结构.采用支持向量机建立预测模型,并将电场特征参数作为预测模型的输入参量,以间隙在给定电压下是否击穿作为输出参量.采用该方法,选取球隙和棒-板间隙作为训练样本,预测环-板、环-环间隙的击穿电压,预测值与试验值吻合良好.该方法为获取复杂空气间隙的击穿电压提供了一条新的途径,有助于减少试验次数,降低试验成本

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