煤矿采动影响区特高压交流线路分体塔的防雷保护  

Lightning Protection of UHVAC 1000 kV Divided-type Tower in Mining-affected Areas

作　　者：葛栋[1] 曹玉杰[2] 李奇峰[2] 张翠霞[1] 张刘春[1] 杜澍春[1] 

机构地区：[1]中国电力科学研究院,北京100192 [2]北京国电华北电力工程有限公司,北京100120

出　　处：《高电压技术》2010年第1期250-254,共5页High Voltage Engineering

基　　金：国家电网公司科技项目(SGSC[2005]126)~~

摘　　要：为了论证长治-南阳-荆门1000 kV特高压交流输电线路煤矿采动影响区拟采用的分体型杆塔方案是否满足防雷保护要求,对分体型杆塔的中相和边相绕击屏蔽性能以及反击耐雷性能进行了研究计算。结果表明:ZBF1和JTF1分体型杆塔的中相不会发生绕击闪络;针对JTF1型杆塔地线对外侧跳线屏蔽较差的情况,推荐在JTF1型杆塔外侧跳线横担前端和其塔顶上各安装一支0.5 m高的避雷针来保护跳线段;JTF1分体型杆塔的中相不会发生反击闪络;为了使特高压分体型杆塔的反击耐雷水平>200 kA,推荐ZBF1塔工频接地电阻应控制在<10Ω,JTF1塔工频接地电阻应控制在<15Ω。UHV transmission line from Changzhi via Nanyang to Jingmen adopts divided-type towers ZBF1 and JTF1 in mining-affected areas to verify whether the relative parameters of divided-type tower satisfy the requirement of lighting protection, for divided-type towers shielding failure performance and back flashover performance of intermediate phase and outer phase are calculated. The obtained results showed that for divided-type towers ZBF1 and JTF1 shielding failure would not occur at their intermediate phases; this paper recommended that one shield wire of 0.5 m height be installed at the front of the outer jumper crossarm and the top of the tower JTF1 respectively, aiming at the condition that the shield wires installed at divided-type towers JTF1 had worse shielding performance for outer jumpers; for the tower JTF1, back ftashover would not occur at its intermediate phase; this paper recommended that the earth resistance of the tower ZBF1 be lower than 10 Ω and that of the tower JTF1 lower than 15 ~＇l, to ensure the lightning withstanding level of back flashover be over 200 kA.

关 键 词：特高压交流输电线路 煤矿采动影响区 分体型杆塔 雷电性能 绕击 反击 

分 类 号：TM863[电气工程—高电压与绝缘技术]