用于风电场小干扰稳定性检验的降阶模式计算方法

doi:10.19595/j.cnki.1000-6753.tces.200158

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Abstract In the planning stage of a large-scale wind farm, if the small-signal stability of all the schemes is examined by using full-order model, the large workload and low working efficiency will affect the solving of the optimal scheme, thus in this paper, a reduced-order modal computation method was proposed. The full-order linearized state-space model was established at first. Secondly, it was considered that in the planning stage of a wind farm, typical model and parameters of the type of wind turbine generator (WTG) selected could be used and the dynamics of the WTGs were similar. Thus a wind farm comprised of N WTGs could be equivalently decoupled into N independent subsystems through equivalent transformation on the variables of the linearized model. Each subsystem was comprised of a single grid-connected WTG. According to the state-space model of the equivalent subsystems, a reduced-order modal computation (ROMC) method was proposed, which could be used to exam the small-signal stability of a wind farm in planning stage accurately with computational burden obviously reduced. Finally, the effectiveness of the method proposed was validated through study cases.

Key words： Wind farm linearized state-space model small-signal stability examination modal analysis equivalent subsystem

Received: 19 February 2020

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TM712

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	Dong Wenkai
	Du Wenjuan
	Wang Haifeng

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Dong Wenkai,Du Wenjuan,Wang Haifeng. Reduced-Order Modal Computation Method for Small-Signal Stability Examination of a Wind Farm[J]. Transactions of China Electrotechnical Society, 2021, 36(7): 1468-1479.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200158 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I7/1468

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