Protection of ±500 kV HVDC Double-circuit Converter Station from Lightning Induced Overvoltage  

作　　者：DONG Manling YUAN Zhiyong LI Tianwei ZHAO Xiangen ZHANG Jiaxin HE Junjia 

机构地区：[1]Electric Power Research Institute, Henan Electric Power Corporation, Zhengzhou 450052, China [2]Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510623, China [3]College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《高电压技术》2013年第8期2053-2060,共8页High Voltage Engineering

基　　金：Project supported by Key Project of National Natural Science Foundation of China （50737003）.

摘　　要：In order to obtain reasonable schemes of arrester in converter stations, the arrester scheme of "Xiluodu-Guangdong HVDC ± 500 kV double circuit transmission" project against lighting induced overvoltage, which was designed according to the main principle of lightning protection in converter station, is discussed. A calculation of the lighting induced overvoltage in Zhaotong converter station un- der various operation modes is performed with ATP-EMTP software, then the surge arrester configuration of the converter station is decided, and the arrester protection schemes of smoothing reactor and neutral line are studied. It is concluded that additional protection is necessary because of the relatively large gap between protected disconnecting switch and arrester of metallic return transfer bus. Plus, the smoothing reactor (SR) arrester near the valve hall could be removed to improve the scheme’s economic performance.In order to obtain reasonable schemes of arrester in converter stations, the arrester scheme of＂Xiluodu-Guangdong HVDC ±500 kV double circuit transmission＂ project against lighting induced overvoltage, which was designed according to the main principle of lightning protection in converter station, is discussed. A calculation of the lighting induced overvoltage in Zhaotong converter station un- der various operation modes is performed with ATP-EMTP software, then the surge arrester configuration of the converter station is decided, and the arrester protection schemes of smoothing reactor and neutral line are studied. It is concluded that additional protection is necessary because of the relatively large gap between protected disconnecting switch and arrester of metallic return transfer bus. Plus, the smoothing reactor （SR） arrester near the valve hall could be removed to improve the scheme＇s economic performance.

关 键 词：高压直流输电 过电压保护 换流站 双回路 雷电感应 ATP-EMTP 平波电抗器 避雷器 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM862