冰雪条件下户外绝缘子绝缘性能的测试与研究

采用试验的方法分别对悬挂式和支柱式绝缘子在各种覆冰和冠雪条件下进行了大量的工频闪络击穿试验，分别对绝缘子覆冰、冠雪、融冰、融雪在环境温度改变等多种不同情况下进行了耐压测试，通过大量的测试数据研究了冰雪条件下绝缘子的耐压水平、影响因素、击穿过程及其击穿机理等，如串长、环境温度、绝缘子形状、冰雪的干湿程度、闪络次数、冠雪量和积冰量雪的密度、气压和温度的影响等。

Study and test of insulation performance under condition of snow and ice for outdoor insulator

The test method is adopted to post insulators and suspensors insulators in all conditions covered with snow or ice,which included different environment temperature,different melted ice and melted snow etc.The insulator is covered with snow or ice.It is studied for withstand voltage level,influence factors,breakdown process and breakdown mechanism through some theory calculation results,many test data and phenomena.The conclusions have been reached that withstand voltage strength of insulator covered with snow or ice descended largely.the amount of ice or snow build up,number of flashover,string length,enviroment temperature and leak current,etc,have obvious effects on flashover voltage values of insulators.