南澳多端柔性直流输电示范工程系统接入与换流站设计方案  

Design Scheme of System Access and Converter Station of Nan'ao VSC-MTDC Demonstration Project

作　　者：李扶中[1] 周敏[1] 贺艳芝[1] 郭金川[1] 王宏斌[1] 

机构地区：[1]广东省电力设计研究院,广州510663

出　　处：《南方电网技术》2015年第1期58-62,共5页Southern Power System Technology

基　　金：国家高技术研究发展计划(863计划)项目(2011AA05A102)~~

摘　　要：南澳多端柔性直流输电示范工程(简称为南澳柔直工程)是世界上第一个VSC-MTDC工程。介绍了南澳柔直工程的系统接入设计方案和换流站设计方案。该工程在南澳岛上建设2个直流送端换流站(金牛站和青澳站),在大陆塑城变电站附近建设1个直流受端换流站(塑城站)。将岛上的风电经柔直线路"青澳—金牛"和"金牛—塑城"送出,并在塑城变电站接入交流系统。通过三种方案的比较,决定换流站接地方式为:联接变压器采用△/Yn形式,在阀侧设置Y接变压器中性点电阻以得到接地点。按功能分区明确、工艺流程紧凑、节能和协调周围环境的原则设计了换流站电气总平面布置方案。Nan＇ao VSC-MTDC Demonstration Project is the first VSC-MTDC project in the world. The design scheme of the system access and converter station is introduced. The sending converter stations, Jinniu station and Qing＇ao station, are built at Nan＇ao island while a accepting converter station, Shucheng station, is set up near Shucheng substation in the mainland. The wind power of the wind farms at Nan＇ao island is sent out through DC lines of Qing＇ao-Jinniu and Jinniu-Shucheng, and integrated into the AC system at Shucheng substation. In comparison of three grounding schemes, one of them is adopted, in which the A/Yn form is for transformer interconnection, and a grounding point with a neutral resistor in the Yn transformer side is chosen. According to the principles of clear function zoning, compact process, energy saving and coordination with the surrounding environment, the general electric layout plan of the converter station is designed.

关 键 词：电压源换流器 模块化多电平换流器 多端柔性直流 

分 类 号：TM721[电气工程—电力系统及自动化]