Lightning performance of EHV and UHV overhead transmission Lines in China southern power grid

被引：0
|
作者：
Cai, Hansheng [1 ]
Jia, Lei [1 ]
Liu, Gang [1 ]
Hu, Shangmao [1 ]
Shi, Jian [1 ]
He, Hengxin [2 ]
Zhao, Xiangen [2 ]
He, Junjia [2 ]
机构：
[1] China Southern Power Grid Elect Power Res Inst, Guangzhou, Guangdong, Peoples R China
[2] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan, Peoples R China
来源：
2016 33RD INTERNATIONAL CONFERENCE ON LIGHTNING PROTECTION (ICLP) | 2016年
关键词：
lightning perfromance; EHV; UHVDC; OHTLs; ground flash density; lightning flashover incidents; risk estimation tool; field experience;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Lightning stroke is the main cause of trip-outs of EHV and UHV transmission lines in China Southern Power Grid (CSG). In order to improving the lightning performance of overhead transmission lines, the lightning activities of CSG in 2006 to 2014 was analyzed. It indicates that the coastal Guangdong and Guangxi province are suffered more ground flashes, where the average ground flash density is over 7.98 flashes/km(2)/year. 306 lightning flashover incidents of 500kV AC, +/- 500kV HVDC and +/- 800kV UHVDC transmission lines were investigated. It is inferred that about 84% lightning flashover incidents was caused by lightning shielding failure. The corresponding ground wire protection angle for 81% incidents is larger than 5 degrees, and with protection angle decreases, lightning trip-out failures are significantly reduced. Based on the guidelines proposed by IEEE and CIGRE working group, CSG has developed their own lightning risk estimation tool named LPTL. The predication result of six 500kV AC transmission lines was compared to field experience which validates the IEEE recommended method for 500kV AC transmission lines. Further works should be done to revisit the validity of existing risk estimation method for HVDC transmission lines.
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页数：6
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