高压电器2017，Vol.53Issue(5)：48-55,62,9.DOI:10.13296/j.1001-1609.hva.2017.05.008
特高压±800kV直流输电线路用避雷器的研制
Development of the Arresters for ±800 kV Ultra-high Voltage DC Transmission Line
摘要
Abstract
±800 kV ultra-high voltage DC (UHVDC) transmission line is an important component of the power grid in China,and its operation state will affect the stability of the power grid directly.UHVDC transmission line features in long transmission distance,complex topography along the line and frequent lightning activity.Lightning flashover has become a key risk point to affect the safe operation of line.At present,±500 kV DC transmission line arrester has realized the development and application,and lightning protection effect is remarkable.But the development and utilization of ±800 kV DC transmission line arrester is still blank.In order to improve the ability of UHVDC transmission line to resist lightning risk,the first domestic ±800 kV DC transmission line arrester was manufactured.The structure of ±800 kV DC transmission line arrester is designed,technical parameters are presented,and the resistor and the production process are selected.The ±800 kV DC transmission line arrester had been developed successfully and verified by the type test,of which the nominal voltage,8/20 ms nominal discharge current 30 kA residual voltage and the positive 50％ lighting impulse discharge voltage are 960 kV,1 900 kV and 2 700 kV,respectively.By means of the type test,it is proved that the electrical and mechanical properties of the line surge arrester are reasonable,which assures the line surge arrester could provide satisfactory protection for the insulator string and air clearance.The successful development and ap-plication of the ±800 kV DC transmission line arrester can provide powerful means for lightning protection of UHVDC transmission line.关键词
±800 kV直流线路避雷器/本体结构/技术参数设计/型式试验/绝缘配合Key words
±800 kV DC transmission line arrester/ontology structure/technical parameter design/type test/insulation coordination引用本文复制引用
万帅,张伟,陈家宏,谷山强,吕军,王剑,曹伟..特高压±800kV直流输电线路用避雷器的研制[J].高压电器,2017,53(5):48-55,62,9.基金项目
国家电网公司科技资助项目.Project Supported by Science and Technology Project of SGCC. （）
