不同虚拟同步机控制下双馈风机系统频率响应差异研究

doi:10.19595/j.cnki.1000-6753.tces.190787

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Abstract

The control effect of inertia support in the doubly-fed induction generator(DFIG) system controlled by virtual synchronous generator(VSG) can be quantitatively described by the H₂/H_∞ norm of the system transfer function matrix. Based on the definition of matrix norm, this paper determines that when the frequency disturbance is taken as the input of the system, the smaller the H₂/H_∞ norm is, the stronger the ability of system frequency oscillation suppression is, and the better the effect of inertia support is. The above correlation was verified by the classical eigenvalue analysis method. The frequency response models of the DFIG system under the controls of different VSG were established, and the control effects of three control strategies on frequency oscillation suppression were compared. Finally, the validity of H₂/H_∞ norm in evaluating system frequency response was verified by the simulation. Based on the minimum H₂ norm, the selection range of the dominant control parameters of the three control strategies was determined, and the difference in frequency response of different control strategies was compared and analyzed.

Key words： Doubly-fed induction generator (DFIG) virtual synchronous generator (VSG) frequency response H₂/H_∞ norm

Received: 30 June 2019

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TM744

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	Zhang Yan
	Gao Han
	Zhang Meng

Cite this article:

Zhang Yan,Gao Han,Zhang Meng. Research on Frequency Response Difference of Doubly-Fed Induction Generator System Controlled by Different Virtual Synchronous Generator Controls[J]. Transactions of China Electrotechnical Society, 2020, 35(13): 2889-2900.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190787 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I13/2889

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