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绝缘子污秽放电泄漏电流的多重分形特征研究

, PP. 50-56

Keywords: 绝缘子,泄漏电流,广义分形维数,多重分形谱,污秽度,污秽放电区段

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Abstract:

泄漏电流信号中含有丰富的体现绝缘子污秽放电发展的特征量。论文在反复实验研究的基础上,利用分形理论提取了绝缘子污秽放电发展过程中泄漏电流的多重分形特征,分析了4种污秽度及不同污秽放电发展区段中多重分形特征量的变化规律得出不同污秽度下广义分形维数减小速度不同,多重分形谱的谱宽随污秽度的增大而增大;不同污秽放电区段多重分形谱的形状和谱宽差异明显;结果表明泄漏电流波形的广义分形维数和多重分形谱宽能有效预测污秽放电的发展趋势,为污闪预警提供了一种新方法。

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