Sequence Impedance Network Model and Stability Analysis for Direct-drive Wind Farm With Static Var Generator

被引：0

作者：

Zhang Y. ^{[1
]}

Sun L. ^{[1
]}

Chen X. ^{[1
]}

Chen J. ^{[1
]}

Gong C. ^{[1
]}

He G. ^{[2
]}

Wang H. ^{[2
]}

Li G. ^{[2
]}

机构：

[1] Jiangsu Key Laboratory of New Energy Generation and Power Conversion, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, Jiangsu Province

[2] State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, China Electric Power Research Institute, Haidian District, Beijing

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Cascaded H-bridge; Direct-drive wind farms; Sequence impedance network model; Stability analysis; Static Var generator;

D O I：

10.13334/j.0258-8013.pcsee.191519

中图分类号：

学科分类号：

摘要：

The current methods for the stability analysis of large-scale wind farms usually ignore the static Var generator (SVG) equipped in the wind farm, and regard the whole wind farm as a single or several turbines connected to an infinite power system. However, such assumption will affect the accuracy of results in the stability analysis. To solve this problem, a method for sequence impedance network modeling and analysis in large-scale wind farms was proposed. Considering that the effects of frequency coupling effect, steady-state operation point as well as operating mode, this method developed sequence impedance model of power unit in wind farms, and proposed a general method for aggregated network admittance modeling, which aggregates a topological network with large numbers of active/passive component impedances into a source-load impedance interconnection system, to accurately analyze the system stability and achieve the quantitative evaluation by a combined stability criterion. Finally, the effectiveness of the proposed method was verified by an example of a wind farm with direct-drive turbines and SVG in Hami. The oscillation mechanism of the wind farm and the effects of operating mode and parameters in power outer loop controller of SVG on the stability were also studied. © 2020 Chin. Soc. for Elec. Eng.

引用

页码：2877 / 2890

页数：13

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