具有主动阻尼特征的LCL并网逆变器状态反馈控制方法

doi:10.19595/j.cnki.1000-6753.tces.L80473

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Abstract Based on discrete state space model analysis for LCL grid-connected inverter, an active damping method is proposed to settle down the stability problems caused by the grid impedance variation and the digital time delay. The common coupling point voltage v_pcc is used as a system state, and its feedback characteristics is studied to reveal its damping effect. In addition, the states feedback characteristics of inverter current i_i and grid current i_g are evaluated respectively. Consequently, a state reconstruction method is provided, which relies on the sampling values of v_pcc and i_g. Meanwhile, the order of the space model is virtually enlarged to improve the system stability. The feasibility and effectiveness of the proposed control method are verified by Matlab/Simulink simulations and experiments.

Key words： LCL filter-based grid-connected inverter state-feedback state reconstruction stability problem

Received: 30 June 2018 Published: 05 May 2019

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TM464

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	Zhang Qi
	Li Rui
	Zhang Yongping
	Ren Biying
	Sun Xiangdong

Cite this article:

Zhang Qi,Li Rui,Zhang Yongping等. Active Damping Method Based on State-Feedback for Grid-Connected Inverter with LCL Filter[J]. Transactions of China Electrotechnical Society, 2019, 34(8): 1698-1707.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80473 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I8/1698

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