气压对直流正极性下冰柱-冰板间隙电晕放电的影响

为进一步了解低气压下覆冰对绝缘子的危害，该文选择冰柱-冰板间隙模型，借助数据采集卡、紫外线成像仪和自行设计的电流传感器等设备，在人工气候室内研究低气压下冰柱-冰板模型的电晕放电特性。文章分析了气压对冰柱-冰板间隙的起晕电压、平均放电量和冰柱尖端处的放电区域等方面的影响。结果表明：起晕电压随着气压的降低而降低，平均放电量和冰柱尖端处的放电区域均随着气压的降低而减小，同时，在较低气压下，起始放电更容易形成辉光放电，放电测量也更困难。

Influence of Atmospheric Pressure on DC Positive Corona Discharge in Icicle to Iced Plate Electrode System

In order to reveal the damage in icing processes and potential danger to insulator at low atmospheric pressure, using icicle to ice-covered plane model and measured by means of ultraviolet imaging instrument, data acquisition card and authors designed sensors, the corona discharge characteristics of icicle to ice-covered plane model was researched in artificial climate chamber at low atmospheric pressure. The influence of atmospheric pressure on corona inception voltage, mean discharge amplitude and discharge area in icicle to ice-covered plane model was analyzed. The results indicate that the corona inception voltage is lower under lower atmospheric pressure; the mean discharge amplitude and discharge area in icicle top are lower under lower atmospheric pressure. Meanwhile, inception discharge is easier to form glow discharge and the measure of discharge is more difficult at lower pressure.