±800kV特高压直流输电工程共用接地极的可靠性评价  

Reliability Assessment on Comment Electrode Sharing of ±800 kV UHV DC Project

作　　者：马为民[1] 杨志栋[1] 李亚男[1] 

机构地区：[1]国家电网公司直流建设分公司,北京100052

出　　处：《高电压技术》2010年第2期301-305,共5页High Voltage Engineering

基　　金：国家电网公司科技项目(SGSC[2005]98)~~

摘　　要：根据向家坝-上海±800 kV特高压直流输电系统采用双换流器串联的主回路结构特点,以及国内已投运的远距离直流输电系统的可靠性、可用率统计数据,建立了向家坝-上海±800 kV直流系统可靠性评价模型,对每极双换流器串联的直流系统的可靠性进行了计算,提出了±800 kV直流系统可靠性指标。利用该模型,对2个直流系统同时发生同极性单极故障的故障率进行了计算,评估了向家坝-上海±800 kV特高压直流输电工程共用接地极的可靠性和影响。Based on the series connection configuration of two 12-pulse converters in ±800 kV UHV DC links and reliability and availability figures of practical operation of HVDC links in China,the philosophy of reliability evaluation model of Xiangjiaba-Shanghai（i.e.XS800） UHV DC system was presented,also the reliability and availability was calculated and the reliability index was proposed based on the calculation result.Based on the model,the influence to XS800 HVDC link arise from sharing the comment electrode was also evaluated.

关 键 词：特高压 直流输电 可靠性 可用率 共用接地极 向家坝-上海特高压直流工程 

分 类 号：TM862[电气工程—高电压与绝缘技术]