【摘要】 覆冰后的棒形悬式绝缘子电气强度明显下降,容易造成覆冰绝缘子串冰闪事故。分别研究了不同覆冰重量和水电导率对操作冲击U50%放电电压的影响,得出覆冰棒形悬式复合绝缘子的U50%放电电压随覆冰重量和水电导率的增加呈乘幂关系下降;冰闪电压随覆冰重量下降的速率呈逐渐变缓的趋势;棒形悬式复合绝缘子的正极性比负极性的操作冲击放电电压低。更多还原

【Abstract】 The iced composite rod insulator has obviously reduced electrical strength which may cause flashover.The effects of ice mass and iced water conductivity on switching surge voltage U50% were studied,which drops by power low with increase of the ice mass and iced water conductivity,with the dropping rate slowing down as the ice mass decreases.The positive switching flashover voltage is lower than the negative one.更多还原