基于FDTD和EMTP的特高压大跨越线路雷击暂态过程对比分析  

Comparative Analysis on Lightning Surge Response of UHVAC Large-span River-crossing Transmission Line Based on FDTD and EMTP

作　　者：谢文炳 赵贤根[2] 肖佩[2] 傅智为 吴文斌 何俊佳[2] XIE Wenbing;ZHAO Xiangen;XIAO Pei;FU Zhiwei;WU Wenbin;HE Junjia(State Grid Fujian Electric Power Corporation Research Institute,Fuzhou 350000,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology of Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网福建省电力有限公司电力科学研究院,福州350000 [2]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《高压电器》2019年第9期187-193,共7页High Voltage Apparatus

摘　　要：大跨越线路的杆塔高、档距长,反击闪络风险高,准确分析其雷击暂态过程,对于保证特高压线路的安全运行具有重要意义。文中针对淮南—上海特高压工程南通—苏州段的大跨越输电线路,分别建立了该线路雷击暂态过程的FDTD和EMTP模型,得到了大跨越线路的杆塔横担与塔顶电压、导线电压和绝缘子串过电压,并开展了对比分析,结果表明:采用Hara提出的杆塔多波阻抗模型,EMTP计算得到的横担和塔顶电压远大于FDTD计算结果;若不考虑感应分量,EMTP计算得到的导线电压大于FDTD计算结果;上述结果导致EMTP计算得到的绝缘子串过电压远高于FDTD计算结果。For accurate analysis of lightning surge response of large-span river-crossing transmission line to ensure the safety of a power system,FDTD and EMTP models of the Nantong-Suzhou river-crossing transmission line in the Huainan-Shanghai UHVAC project are built.The voltages of the tower top,crossarms,phase conductors and insulator strings are calculated via both of the models,and comparative analysis is carried out.It is concluded that:1)EMTP a chieves much higher voltages of the tower top and crossarms than FDTD if the multistory transmission tower model proposed by Hara is used for the EMTP model;2)EMTP achieves much higher voltages of phase conductors than FDTD if the induced voltage from the current in lightning channel is ignored;and 3)EMTP achieves much higherover voltages of insulator strings than FDTD.

关 键 词：大跨越线路 特高压 雷电暂态特性 FDTD EMTP 感应分量 注入分量 

分 类 号：TM863[电气工程—高电压与绝缘技术]