论文部分内容阅读
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 evalua-tion 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 influ-ence to XS800 HVDC link arise from sharing the comment electrode was also evaluated.