An AC/DC System Power Flow Algorithm With VSC-MTDC

被引：0
|
作者：
Zhou T. [1 ]
Chen Z. [1 ]
Dai Z. [1 ]
Sun K. [1 ]
Liu Y. [1 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing, 210096, Jiangsu
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 11期
基金：
国家重点研发计划;
关键词：
AC/DC system; DC voltage droop control; Master-slave control; Power flow calculation; VSC-MTDC;
D O I：
10.13334/j.0258-8013.pcsee.181322
中图分类号：
学科分类号：
摘要：
Voltage source converter based multi-terminal direct current system (VSC-MTDC), which develops from two-terminal DC transmission system, has a high reliability and is appropriate for offshore wind power grid connection. The control strategies of VSC-MTDC are multifarious and corresponding power flow models are more complicated. This paper studied the steady-state model of VSC station and MTDC and deduces the power flow model of MTDC which is appropriate for different DC topologies and connection types. Then control strategies of VSC-MTDC and their differences of power models were analyzed. On this basis, an AC/DC power flow algorithm with VSC-MTDC was proposed, which contains the advantages of the unified iterative method and alternating iterative method and can be applied to different DC topologies and AC systems. In addition, the calculation method of initial values and boundary conditions were given in this paper. Finally, the validity and convergence of the algorithm were demonstrated in two practical cases. The results indicate that the algorithm can converge steadily and rapidly under different control modes, scenes and DC topologies. © 2019 Chin. Soc. for Elec. Eng.
引用
收藏
页码：3140 / 3148
页数：8
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