新型500kV输电线路并联间隙在高海拔条件下的选型与防雷效果  

Type-Selection and Lightning Protection Effect of New-Type 500 kV Transmission Line Parallel Gaps in High Altitude Region

作　　者：任华 马凝芳[4] 赵淳 许衡 苏杰[1,2,3] 赵俊杰 吴敏[1,2,3] 马志清 王宇[1,2,3] REN Hua;MA Ningfang;ZHAO Chun;XU Heng;SU Jie;ZHAO Junjie;WU Min;MA Zhiqing;WANG Yu(NARI Group Corporation Ltd.,Nanjing 211106,China;Wuhan NARI Limited Company of NARI Group Corporation,Wuhan 430074,China;Hubei Key Laboratory of Power Grid Lightning Risk Prevention,Wuhan 430074,China;China Academy of Information and Communications Technology,Beijing 100191,China;State Grid Jinhua Power Supply Company,Jinhua,Zhejiang 321000,China;Electric Power Research Institute of State Grid Qinghai Electric Power Company,Xining 810000,China)

机构地区：[1]南瑞集团有限公司,南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]电网雷击风险预防湖北省重点实验室,武汉430074 [4]中国信息通信研究院,北京100191 [5]国网浙江省电力公司金华供电公司,浙江金华321000 [6]国网青海省电力公司电力科学研究院,西宁810000

出　　处：《南方电网技术》2021年第3期83-91,共9页Southern Power System Technology

基　　金：国家电网公司科技指南项目(524625180018)。

摘　　要：实际运行经验表明,采用标准中推荐的500 kV并联间隙经常出现保护失效情形。相关研究人员已研制出适用于一般地区的新型500 kV并联间隙,但在高海拔条件下,新型500 kV并联间隙的尺寸参数不能直接采用一般地区的参数。本文在海拔2100 m的特高压工程技术(昆明)国家工程实验室环境下,针对不同串长下不同尺寸参数的并联间隙进行了U 50%雷电冲击试验、伏秒特性试验、可见电晕和无线电干扰试验,并进行了保护有效性分析;通过仿真得到了安装并联间隙前后杆塔耐雷性能的变化。研究结果表明,当绝缘子片数分别为33片和37片时,推荐选取的并联间隙电极横向伸出长度分别为800/800 mm、850/850 mm,在安装并联间隙后,单回线路耐雷水平均较安装前降低,但双回线路同时闪络耐雷水平均有所提高,提高幅度分别为11.3%和11.6%。Actual operation experiments show that invalid protection of parallel gaps often occurs when parallel gaps recommended by relative standard are used.New type of 500 kV parallel gap used in normal region has been developed,while in high altitude region,the size of new type 500 kV parallel gap cannot be used directly.In this paper,U 50%lightning impulse test,volt-time characteristic test,discharge visible corona and radio interference test of parallel gaps with different size are carried out in National Engineering Laboratory for UHV Engineering Technology(Kunming),the altitude of which is about 2100 m,and the effectiveness of protection of parallel gap is analyzed;then the lightning performances with and without parallel gap are acquired by simulation.The result shows that,when the numbers of insulator of insulator string are 33 and 37,the crosswise lengths of electrode are respectively recommended as 800/800 mm and 850/850 mm,and after installing parallel gaps,the lightning performance of single circuit is reduced compared with no parallel gap,while the lightning performance of double circuit simultaneously flashover is improved,and the increased percentage is respectively 11.3%and 11.6%.

关 键 词：高海拔 500 kV并联间隙 高压试验 保护有效性 并联间隙选型 

分 类 号：TM866[电气工程—高电压与绝缘技术]