减少通化电网输电线路雷击跳闸故障的措施

Measures to Reduce Transmission Line Lightning Trip-out Fault in Tonghua Power Grid

在对通化地区220kV输电线路雷击跳闸进行统计分析的基础上,通过理论计算,对输电线路反击和绕击2种跳闸故障的影响因素进行了分析,结合通化电网防雷的实践,进行合金接地体改造,有效降低了杆塔的接地电阻,提高反击耐雷水平,此外安装架空耦合地线以提高防雷效果。对新建线路设计提出采用零保护角或负保护角、安装线路避雷器等建议。

Lighting is an important factor causing the transmission line fault tripping,it seriously affect the security and stability of the transmission lines.This paper added up Tonghua area 220 kV transmission line lighting trips,analyzed counter-attack and around-attack of transmission line lighting trips.Besides,this paper put forward reasonable proposals for maintenance of transmission lines based on practical experiences of lighting prevent in Tonghua power grid.Reasonable suggestions such as installation of line lightning arrester,using zero angle or negative protect horn are put out on the new circuit design.