RAPID EXCITATION CONTROL AND POWER ANGLE COMPENSATION STRATEGY FOR DOUBLE-FED VIRTUAL SYNCHRONOUS GENERATOR

Hu Zhishuai; Ren Yongfeng; Meng Qingtian; Han Junfei; Chen Jian; He Bin

doi:10.19912/j.0254-0096.tynxb.2022-1417

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (1) : 134-142. DOI: 10.19912/j.0254-0096.tynxb.2022-1417

RAPID EXCITATION CONTROL AND POWER ANGLE COMPENSATION STRATEGY FOR DOUBLE-FED VIRTUAL SYNCHRONOUS GENERATOR

Hu Zhishuai¹, Ren Yongfeng¹, Meng Qingtian^1,2, Han Junfei¹, Chen Jian¹, He Bin¹

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Abstract

Under the strategy of the doubly-fed virtual synchronous generator with the excitation voltage as the target control voltage, the power angle of the system is large, which will cause the power coupling problem. The rapid reactive power control strategy and power angle compensation synergy are proposed to eliminate power coupling. The rapid excitation control strategy can eliminate the influence of the power angle disturbance on the reactive power, and the power angle compensation strategy can eliminate the influence of the exciting voltage disturbance on the active power. On the basis of analyzing the mathematical model of the doubly-fed machine and designing the overall control strategy of the doubly fed virtual synchronous generator, a small signal model including reactive power control link is constructed. The rapid excitation control is designed by analyzing the influence of the reactive power PI controller parameters on the power angle stability. The angle compensation strategy is designed based on the analysis of the relationship between reactive power disturbance and power angle variation. The simulation is conducted under three different working conditions： wind speed disturbance, grid frequency disturbance and grid voltage disturbance. The results reveal that the proposed control strategy can effectively avoid the interaction influence between active power control and reactive power control when the doubly-fed virtual synchronous generator is running under high power angle condition.

Key words

wind turbines / electric machine control / induction machine / virtual synchronous generator / power decoupling / small signal model

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Hu Zhishuai, Ren Yongfeng, Meng Qingtian, Han Junfei, Chen Jian, He Bin. RAPID EXCITATION CONTROL AND POWER ANGLE COMPENSATION STRATEGY FOR DOUBLE-FED VIRTUAL SYNCHRONOUS GENERATOR[J]. Acta Energiae Solaris Sinica. 2024, 45(1): 134-142 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1417

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