110 kV线路雷击闪络限制器安装方式对玻璃绝缘子电场分布的影响

110 kV线路雷击闪络限制器有2种典型安装方式:下放电电极位置低于均压环和高于均压环,根据雷击闪络限制器的2种安装方式,建立110 kV同塔双回输电线路有限元计算模型,研究雷击闪络限制器的2种安装方式对玻璃绝缘子串和均压环电场分布的影响。结果表明,下放电电极低于均压环的安装方式降低了沿玻璃绝缘子串的电压及电场强度分布的均匀性,而下放电电极高于均压环的安装方式提高了沿玻璃绝缘子串的电压及电场强度分布的均匀性;雷击闪络限制器的2种安装方式均使均压环表面的电场强度有所减小。建议在玻璃绝缘子安装雷击闪络限制器时,使雷击闪络限制器下放电电极的位置高于均压环。

Influence of flashover limiter:installation position on electric field distribution of 110 kV glass insulator

110 kV flshover limiter has two kinds of itallation method depending on the lower discharge eletrode intslledl lower or bigher then grading ring.In this peper,。fnite element model is etablished for a 110 kV double cireuit trasmisiosn line and the infuence of itallationo type for the etrie feld dstrbutio of glass insulatoar and grading ring is comnpared.It is shown that the lower etrode which is intalledl lower than the grading ring reduces the uniformity of etric field along the glss insulator,whereas the other inatalation method uniform the eletrte field along the glass insulator.Both two types of itallation reduce the ectie ficld at the outer surfeccof the grnding ring,It is better that the lower discharge electrode is intalldl higher than grading ring when italligg 110 kV flashover limiter on glass insulator.