数字控制延时对电流环解耦有效性的影响

doi:10.19595/j.cnki.1000-6753.tces.191591

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Abstract This paper analyzes the effect of digital control delay on the effectiveness of current loop decoupling (feed-forward decoupling and complex vector PI decoupling) in the synchronous rotating frame, revealing the nature of the decoupling failure under the condition of low switching frequency or high control frequency. And the delay compensation method for suppressing the current loop coupling is proposed. The advantages and disadvantages of the two decoupling methods are then compared in term of the decoupling effectiveness and the dynamic response speed of the current loop. Compared to the feed-forward decoupling, the coupling between d axis and q axis of complex vector PI decoupling is reduced by 50%, and the dynamic response speed is about twice. Simulation and experimental results are carried out to verify the correctness of the theoretical analysis.

Key words： Current control current loop decoupling vector model delay compensation

Received: 21 November 2019

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TM46

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	Articles by authors
	Zhang Sen
	Zhao Jianfeng
	Liu Kangli
	Zhao Zhihong
	Li Baorun

Cite this article:

Zhang Sen,Zhao Jianfeng,Liu Kangli等. Research on the Impacts of Digital Control Delay on the Effectiveness of Current Loop Decoupling[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 484-493.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191591 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk2/484

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