多雷区雷击电压暂降及电压敏感设备跳闸的分析与研究

Analysis and Research on Voltage Sag Induced by Thunder and on Tripping of Voltage-sensitive Electric Equipment in the Thunderstorm Region

介绍了雷击输电线路绝缘子串发生闪络的过程,分析了雷击闪络产生的电压暂降的影响范围、暂降幅度和持续时间。结合某工业园区内电子信息企业用户电压敏感型负荷跳闸的实际案例,分别从电网和用户两方面提出了降低雷击引起用户跳闸概率的方法与措施,为电网公司解决强雷区和多雷区同类问题提供了理论参考和实际经验,为电力用户降低电气设备停机造成的损失提供参考。

The process of lightning flashover of insulator strings in transmission lines was introduced.The influence range,sag amplitude and duration of the voltage sag caused by lightning flashover were analyzed.Combined with an actual case of voltage-sensitive load tripping of electronic enterprise users in an industrial park,the methods and measures for reducing the probability of tripping caused by lightning strikes from both grid and users were proposed,which provided suggestion and practical experience to solve the same problems in thunderstorm region for grid companies.References for power users to reduce the losses caused by the shutdown of electrical equipment were provided.