摘要
搭建了一种混合直流输电物理动模平台,其整流站采用串联的电网换相换流器(LCC),逆变站采用半桥和全桥子模块混合的模块化多电平换流器(FHMMC)。为提高系统容量,逆变侧的FHMMC换流器采用高低阀组串联的拓扑结构。对不同全桥子模块配比下高低阀组的在线投退、直流故障穿越等关键技术进行了研究,并在所设计的动模平台上进行了实验验证。实验结果表明所提出的控制策略能够实现混合直流输电系统的高低阀组在线投退及故障自清除,为多种混合直流输电以及新型电压源换流器的工程应用提供了论证平台。
A dynamic simulation experimental platform for hybrid HVDC transmission is established,which adopts line commutated converters(LCCs)in rectifier station,and hybrid modular multilevel converters(FHMMCs)based on half bridge sub-module and full bridge sub-module in inverter station.In order to increase the system capacity,the FHMMC on the inverter side adopts a structure with valve groups in series.The key technologies such as valve groups deblocking and blocking and DC fault ride-through with different proportions of the full bridge sub-module are studied,and the experimental verification on the dynamic platform is carried out.The results show that the proposed control strategies can realize the valve groups deblocking and blocking and DC fault ride-through of the hybrid HVDC transmission system,and a demonstration platform for the application of hybrid HVDC transmission and voltage source converters is provided.
作者
董朝阳
吉攀攀
冯敏
俎立峰
王晓丽
司志磊
张哲
DONG Chaoyang;JI Panpan;FENG Min;ZU Lifeng;WANG Xiaoli;SI Zhilei;ZHANG Zhe(XJ Electric Ltd, Xuchang 461000, China;XJ Group Corporation, Xuchang 461000, China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2019年第13期148-155,共8页
Power System Protection and Control
基金
国家电网公司总部科技项目资助(52110418001W)“柔直换流阀可靠性提升关键技术研究”~~
