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基于电场特征量和SVM的空气间隙击穿电压预测

DOI: 10.13334/j.0258-8013.pcsee.2015.03.030, PP. 742-750

Keywords: 击穿电压,预测,电场特征量,支持向量机,短间隙,长间隙

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Abstract:

空气间隙的击穿电压是高压输变电工程外绝缘设计的重要依据。该文提出了一种基于电场特征量和支持向量机(supportvectormachine,SVM)的空气间隙击穿电压预测方法。根据静电场计算结果,从整个区域、放电通道、电极表面和最短路径4个方面提取电场值,经过处理后构成表征间隙结构的电场特征量集合,作为SVM的输入参量;以间隙是否击穿(回归问题转换成2分类问题)作为SVM的输出参量,建立了空气间隙击穿电压的预测模型。采用该模型对球隙、棒-板、球-板、球-板-球短间隙的工频击穿电压和球-板长间隙的正极性操作冲击50%放电电压进行了预测,预测值与试验值吻合,验证了模型的有效性。该方法为输变电工程间隙击穿电压的获取提供了一条可能的新途径。

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