广州换流站柔性化改造设计方案研究  

Research on Design of Guangzhou LCC-HVDC Converter Station Retrofit for VSC-HVDC Converter Station

作　　者：简翔浩 卢毓欣 郝为瀚 彭冠炎 JIAN Xianghao;LU Yuxin;HAO Weihan;PENG Guanyan(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China;Electric Power Research Institute,CSG,Guangzhou 510080,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广州510633 [2]南方电网科学研究院有限责任公司,广州510080

出　　处：《南方能源建设》2020年第4期54-60,共7页Southern Energy Construction

基　　金：南方电网公司重点科技项目“大容量高电压柔性直流输电关键技术及工程应用研究”。

摘　　要：[目的]为避免高压直流受端换流站逆变器换相失败,同时提高受端换流站交流系统的电压稳定性,研究将天广直流受端广州换流站改造为柔性直流换流站,并扩容为3 GW的可行性。[方法]基于满足柔性直流输电的各种运行方式、便于增容、适应设备研发水平,以及充分利用现有设备及建筑,减少改造的难度和费用,研究对比了不同换流阀拓扑结构、功率模块拓扑结构,研究了启动回路设置、直流场电气接线、联接变压器型式等。[结果]研究分析表明,增容改造方案推荐每极采用1个1.5 GW换流阀、半桥-全桥功率模块混合型式、对称双极接线、启动回路设置在阀侧、横向尺寸大的联接变压器。[结论]该研究为现有常规直流输电换流站改造为柔性直流输电换流站提供改造思路和方法。[Introduction]In order to avoid the commutation failures of receiving end convertor converter station in LCC-HVDC transmission systems,and to improve the voltage stability of receiving end converter station AC system,The research retrofitted Tianguang HVDC receiving end converter station for VSC-HVD,and expansion to 3 GW.[Method]Based on meeting the various operation modes of flexible DC transmission,facilitating capacity increase,adapting to the level of equipment research and development,and making full use of existing equipment and buildings to reduce the difficulty and cost of transformation.Research compared different converter valve topologies and submodule topologies,studied the setting of the start-up circuit,the electrical wiring of the DC field,and the type of interface transformer.[Result]Research and analysis show that the capacity-increasing transformation plan recommends the use of a 1.5 GW converter valve per pole,half bridge-full bridge submodule hybrid type,symmetrical bipolar wiring,start-up circuit set on the side of the valve,large transverse size connection transformer.[Conclusion]This research provides the ideas and methods for the transformation of existing of the existing LCC-HVDC converter station retrofit for VSC-HVDC converter station.

关 键 词：混合直流输电 柔性直流换流站改造 半桥-全桥子混合型模块 启动回路 

分 类 号：TM7[电气工程—电力系统及自动化] TM721.1