330kV线路避雷器的开发和应用

介绍了330 kV线路型无间隙金属氧化物避雷器的主要性能参数的确定,以及通过避雷器电位分布的实际测量,优化避雷器的均压结构;对安装在杆塔上的330 kV线路避雷器,采用在避雷器高压端加装直径为1m的均压环,在第一节和第二节避雷器元件间安装均压环的均压措施,使得避雷器的最大电位分布不均匀系数小于或等于13.56%,保证了避雷器的可靠运行;提出了避雷器在不同类型的杆塔上的两种安装及避雷器安装点的选取原则.开发的避雷器已在陕西省多条330 kV线路上应用,取得了显著的防雷效果.

Development and Application of 330 kV Line Arresters

Introduction was made to the settlement for main performance parameters of 330kV line without clearance metal oxide arresters, and via actual measurement of arrester electric level distribution, reengineer even pressure of the arrester; to adopt for on post 300kV line arrester to install even pressure ring with diameter 1m at arrester high voltage end, the installation of even pressure measure of even pressure ring between elements of first node and second node arresters made the max electrical level distribution unevenness coefficient of arrester to be less than or equal to 13.56%, ensuring reliable operation of arresters two ways of arrester installation and installing point selection principle on different types of post were raised. The arresters developed have been applied in many 330kV line in Shanxi, having achieved obvious lightning effects.