Research on Control Method of VSC based DC grid with Weak AC system integrated

被引:0
|
作者
Yu Yong-sheng [1 ]
Jia Jian-hua [1 ]
Feng Yan-hui [2 ]
Qiu Ying-ning [2 ]
Wu Sheng-zhi [1 ]
Xiao Jian-chao [1 ]
Zou Zhi-wen [1 ]
机构
[1] State Grid Tianjin Jizhou Elect Power Supply Co, Tianjin, Peoples R China
[2] Nanjing Univ Sci & Technol, Coll Energy & Power Engn, Nanjing, Jiangsu, Peoples R China
关键词
VSC-HVDC; DC grid; Hierarchical control; Passive AC grid; weak grid;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Scenario of Passive grid connecting two VSC-HVDC transmission systems has been investigated in this paper. A control method with hierarchy is proposed. VSCs have been grouped into a hierarchy of various categories. Distance which denotes the number of connections with strong grid of VSC stations is used to define the hierarchy used in this paper. Different control methods are used in different categories to regulate different variables. This method can be used in DC grids with many VSCs grouped into a hierarchy of various categories. This paper presents a multilayer DC system with a passive AC grid inside the DC grid. The control principle of VSCs connected with the passive grid is investigated. The AC voltage control and active power control is assigned to different VSC based on its power flow in the inside passive AC grid. Also a DC voltage control is integrated in the hierarchy control system to improve the dynamic instability.
引用
收藏
页码:1046 / 1051
页数:6
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