电网技术2012，Vol.36Issue(9)：1-8,8.
±1100kV特高压直流换流站过电压保护和绝缘配合
Overvoltage Protection and Insulation Coordination for ±1100 kV UHVDC Converter Station
摘要
Abstract
To decide the insulation level for ±1 100 kV converter station reasonably, based on ±1 100 kV UHVDC power transmission project from Zhundong to Chengdu and according to the insulation coordination for UHV converter station the insulation coordination of Zhundong converter station is studied. In accordance with the fundamental principles of the arrester configuration for UHVDC converter station and using existing experiences in insulation coordination of ±800 kV UHVDC converter stations for reference, an arrester configuration scheme for ±1 100 kV UHVDC Zhundong converter station is proposed, and the overvotlage protection strategies for different regions in the converter station, such as AC side of the converter substation, the valve hall, the DC busbar and neutral busbar, are analyzed in detail. Finally, based on the recommended insultation margins for the equipment, the insulation levels for equipments of the converter station are decided: for 1100 kV DC polar line at the DC side, 2 600 kV and 2 150 kV are recommended as the insulation level of lighting impulse and that of swtiching impulse respectively; for equipments connected to the valve side of smoothing reactor of 1 100 kV DC polar line and equipments connected to valve side at the HV side of Y-Y connected converter transformer, it is recommended that inuslation levels for both kinds of equipements should be the same, I.e., 2 500 kV for insulation level of lightning impluse and 2 250 kV for insulation level of switching impluse respectively. Results of this study is of guiding significance to both type selection and manufacture of equipments for UHVDC converter stations, and provide important reference for the construction of this 1100kV UHVDC power transmission project.关键词
特高压直流输电/±1100kV/换流站/避雷器/过电压保护/绝缘配合/绝缘水平Key words
UHVDC power transmission/ ±1 100 kV / converter station/ arrester/ overvoltage protection/ insulation coordination/insulation level分类
信息技术与安全科学引用本文复制引用
周浩,王东举..±1100kV特高压直流换流站过电压保护和绝缘配合[J].电网技术,2012,36(9):1-8,8.基金项目
国家重点基础研究发展计划(973项目)(2011CB209405). （973项目）
