Pollution flashover accident of insulators may threaten the operation safety of power system, whereas, the research on pollution flashover circuit model is based on the plate model by now.
绝缘子污秽闪络事故严重威胁电力系统的安全可靠运行，目前国内外对污闪机理的研究主要以平板模型为基础。
A mathematical model is presented according to the mechanism of DC pollution flashover for computing DC pollution flashover voltage.
在现有污闪机理的基础上，提出一种能反映直流污闪基本特点，并计算绝缘子直流污闪电压的数学模型。
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