摘要
随着大规模新能源的逐步接入,混合直流输电系统(hybrid multiple sending terminals HVDC,H-MSTDC)逐步由单送端结构发展为多送端多受端结构,多个换流站的运行方式及送端换流站之间容量分配增加了可靠性评估的复杂度。考虑多个送端和受端换流站之间的容量分配系数,分析了混合多送端直流输电系统的典型接线和运行方式,构建了混合多送端直流输电系统各受端及系统综合可靠性指标体系,基于子系统划分和均匀设计法提出了H-MSTDC可靠性评估模型。最后,基于我国藏东南工程某二送二受备选接线结构,计及容量分配系数,进行直流输电系统可靠性评估,并分析了极端地理环境影响下系统可靠性的变化趋势,为实际工程提供参考。
With the gradual integration of large-scale new energy,hybrid multiple sending terminals HVDC(H-MSTDC)system gradually develops from single terminal structure to multiple sending and receiving terminals.The operation mode of multiple converter stations and capacity allocation among converter stations increase the complexity of reliability evaluation.The typical con-nection structure and operation mode of H-MSTDC system are analyzed by considering the capacity distribution coefficient among converter stations in multiple sending terminals and receiving terminals,and the comprehensive reliability index of each receiver and system of H-MSTDC system is constructed.The reliability evaluation model is proposed based on subsystem division and uniform design method.Finally,based on the alternative connection structure of a two-sending and two-receiving project in southeast Tibet and considering the capacity allocation coefficient,the reliability evaluation of H-MSTDC system is carried out,and the variation trend of system reliability under the influence of extreme geographical environment is analyzed,which can provide reference for practical projects.
作者
江一
曹显武
谢桂泉
李凌飞
辛清明
李欢
姬煜轲
侯婷
赵晓斌
李岩
JIANG Yi;CAO Xianwu;XIE Guiquan;LI Lingfei;XIN Qingming;LI Huan;JI Yuke;HOU Ting;ZHAO Xiaobin;LI Yan(EHV Power Transmission Company,CSG,Guangzhou 510663,China;Electric Power Research Institute,CSG,Guangzhou 510663,China)
出处
《南方电网技术》
CSCD
北大核心
2023年第9期57-67,共11页
Southern Power System Technology
基金
国家自然科学基金资助项目(51677011)。
