架空配电线路过电压保护技术设计  

Design of Overvoltage Protection Technology for Overhead Distribution Line

作　　者：王恒 WANG Heng(Hunan City University Design&Research Institute Co.,Ltd.,Changsha 410000,China)

机构地区：[1]湖南城市学院设计研究院有限公司,湖南长沙410000

出　　处：《通信电源技术》2023年第2期7-9,13,共4页Telecom Power Technology

摘　　要：电力系统覆盖范围的增加和电力能源需求的增长,使得架空配电线路数量呈现持续上升的趋势,配电线路整体结构更加复杂,过电压产生次数居高不下,威胁着配电线路的稳定与安全,提出架空配电线路过电压保护技术设计研究。构建架空配电线路数学模型,并深入分析配电线路的电流、电压与功率因数特性,以此为基础探究内部与外部过电压的原理,制定相应的内部与外部过电压保护技术,应用设计技术即可实现配电线路过电压的保护与抑制。实验结果显示,应用提出技术获得的配电线路过电压持续时间最小值为0.5 s,表明提出技术过电压保护与抑制的效果较好,充分证实了其应用性能较佳。With the increase of power system coverage and power energy demand,the number of overhead distribution lines shows a continuous upward trend.The overall structure of distribution lines is more complex,and the frequency of overvoltage generation remains high,it threatens the stability and safety of distribution lines.The design and research of over-voltage protection technology for overhead distribution lines are put forward.The mathematical model of overhead distribution line is established,and the characteristics of current,voltage and power factor of distribution line are deeply analyzed,the corresponding internal and external over-voltage protection technology is formulated,and the over-voltage protection and suppression of distribution line can be realized by using the design technology.The experimental results show that the minimum value of overvoltage duration is 0.5 s,which indicates that the effect of overvoltage protection and suppression is better,it is fully proved that the proposed technology has better application performance.

关 键 词：内部过电压 架空配电线路 雷击过电压计算 过电压保护 配电线路模型构建 外部过电压 

分 类 号：TM77[电气工程—电力系统及自动化]