Subsynchronous Oscillation Mechanism Analysis of Direct-drive Wind Farm With VSC-HVDC System Based on Path Analysis Method

被引：0

作者：

Gao B. ^{[1
]}

Liu Y. ^{[1
]}

Wang X. ^{[2
]}

机构：

[1] Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province, North China Electric Power University, Hebei Province, Baoding

[2] State Grid Jibei Electric Power Co., Ltd. Research Institution, Xicheng District, Beijing

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 17期

关键词：

direct-drive wind farm; modal extension; path analysis method; subsynchronous oscillation(SSO); voltage source converter based high voltage direct current(VSC-HVDC);

D O I：

10.13334/j.0258-8013.pcsee.221589

中图分类号：

学科分类号：

摘要：

Aiming at the subsynchronous oscillation (SSO) problem in direct-drive wind farms with voltage source converter based high voltage direct current (VSC-HVDC) systems, the current research is difficult to reveal the disturbance transfer process and coupling relationship between the subsystems, as well as quantify the impact of different characteristics on the system stability in the mechanism analysis. Therefore, this paper studies the SSO mechanism of the system based on the path analysis method, and takes the phase-locked loop (PLL) oscillation mode as an example to carry out the modal extension of the path analysis method. First, the linearized model of the system is established with the modular modeling method. The damping coefficient of the rotor motion equation is extended to the dominant element dynamic equation of the oscillation mode, thereby obtaining the stability criterion of the system. Then, the disturbance transfer process and coupling relationship between the subsystems are revealed based on path analysis, and the impact of the internal characteristics of the wind farm and the interaction characteristics between the wind farm and the VSC-HVDC on system stability are quantified based on damping decomposition. Finally, the impact of the PLL controller parameters on the damping characteristics is investigated. The results show that the path analysis method can be applied to different oscillation modes. The disturbance transfer path between the direct-drive wind farm and the VSC-HVDC presents a double closed-loop coupling relationship. The total damping coefficient of the system can be effectively improved by increasing the PLL proportional coefficient of the wind turbine or reducing the PLL integral coefficient of the wind turbine, thus improving the stability of the system. ©2023 Chin.Soc.for Elec.Eng.

引用

页码：6646 / 6659

页数：13

共 29 条

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