安装避雷器后10kV配电线路的雷电感应过电压特性.PDFVIP

第 36 卷 第 7 期 电 网 技 术 Vol. 36 No. 7 2012 年 7 月 Power System Technology Jul. 2012 文章编号：1000-3673 （2012 ）07-0149-06 中图分类号：TM 855 文献标志码：A 学科代码：470·4037 安装避雷器后 10 kV 配电线路的 雷电感应过电压特性 王希，王顺超，何金良，曾嵘 （电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系) ，北京市 海淀区 100084 ） Lightning Induced Overvoltage Characteristics of 10 kV Overhead Distribution Lines With Surge Arresters WANG Xi, WANG Shunchao, HE Jinliang, ZENG Rong (State Key Lab of Control and Simulation of Power Systems and Generation Equipments (Dept. of Electrical Engineering, Tsinghua University), Haidian District, Beijing 100084, China) ABSTRACT: Surge arrester is widely used to decrease and 过电压导致的闪络事故率很高。随着绝缘导线在低 avoid the flashovers of distribution lines caused by lightning 压配电线路中的广泛应用，雷击闪络引起导线的电 strikes. An improved algorithm is proposed using the finite 弧熔断问题越发严重。雷击造成的电弧熔断现象是 difference time domain algorithm (FDTD) to solve 指雷电使导线外绝缘层击穿，闪络时工频短路电弧 multi-conductor transmission line equation and taking insulator 固定在击穿点燃烧而导致导线的熔断。目前国内外 and arrester model into account. The paper focuses on the [1] influence of arresters on lightning protection characteristics and 已提出了多种方案来解决断线问题 ，其中在线路 statistical evaluation of lightning-induced voltage in 10 kV 上安装避雷器是防止导线断线的有效措施之一[2-5] 。 distribution power system. The statistical evaluation results of the 10 kV 配电避雷器能够有效抑制雷击线路附近大地 maximum lightning-induced phase-ground voltage are presented, 产生的感应雷过电压，但由于配电避雷器的通流能 considering i