气体灭弧防雷方法的发展与研究综述

Development and research on gas arc-extinguishing lightning protection methods

雷电是电力系统第一事故源,其引发的跳闸断线等事故高发,严重影响供电系统的可靠性和用户用电的稳定性及安全性。如今输电线路防雷存在着多重雷击、高土壤率地区反击、大峡谷绕击等防护瓶颈,传统防雷措施在大概率多重雷击防护方面的缺失是导致雷击事故高发的主要原因。气体灭弧防雷方法是一种全新的防雷模式,其工作原理是在绝缘子旁路的雷击过电压形成电弧后快速熄灭电弧,阻止后续工频续流,防雷效果不受雷击类型、强度、方式和部位的影响。实现了对多重雷击、高土壤率地区反击等雷击工况的防护,可有效管控雷击事故率。相信随着后续研究的深入开展,该防雷方法将会在更广阔的领域得到应用和发展。

Lightning is the first accident source of the power system,which causes a high accident rate of tripping and broken line,seriously affecting the reliability of system power supply and user’s power stability and safety.Nowa-days,there are several bottlenecks in transmission line lightning protection such as multiple lightning stroke,back flashover in high soil resistivity area and shielding failure in canyon.Particularly,high probability multiple light-ning stroke is the main reason causing the high rate and long-term stability of lightning accidents.Technology of gas arc-extinguishing lightning protection is a new lightning protection model,whose working principle is that the arc is extinguished quickly after the lightning strike overvoltage of the insulator bypass forms an arc,which prevents the subsequent power frequency continuation.The protecion effect is not affected by lightning strike type,intensity,pattern,and position,which realizes effective control of lightning accident rate.It is believed that the lightning protection method will be applied and developed in a wider field with the further research.