摘要
为了提高线路绕击耐雷性能,笔者研究了高压输电线路绕击耐雷性能的分析方法,对考虑击距系数K和地面倾角θ后的电气几何模型,以杆塔中心线与大地交点作参考点,推导了最大击距的计算方法,同时探讨了最大击距不存在情形下击距系数K、避雷线保护角α、地面倾角θ的关系问题,论证了可以通过平衡K、α、θ的取值而有效提高线路绕击耐雷性能。
In order to improve the performance of electric transmission line protecting around hit lightning, this paper focuses on the analysis method of the high voltage transmission line about the lightning protection performance of shielding failure. According to the EGM in which the striking distance factor K and ground obliquity θ is considered, it takes the intersection of transmission tower central line and ground as reference point, and then derives the calculation method of the maximum striking distance. It also discusses the relationship among the striking distance factor K, protection angle of lightning conductor α and ground obliquity θ when the maximum striking distance does not exist, and demonstrates that the lightning protection performance of shielding failure can be enhanced effectively through the balance of K, α, and θ.
出处
《高压电器》
CAS
CSCD
北大核心
2008年第1期56-58,共3页
High Voltage Apparatus
关键词
改进电气几何模型
最大击距
绕击耐雷性能
improved EGM
maximum striking distance
lightning protection performance of shielding failure
