功率变化环境下的四线制Vienna整流器优化联合控制方法

doi:10.19595/j.cnki.1000-6753.tces.191681

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Abstract

In most cases, power fluctuation will result in zero-crossing distortion and current ripples during the operation of three-phase four-wire Vienna rectifier under the traditional dual loop control with PI regulator. This paper discussed the influence of power fluctuation on the input current from the perspective of continuous current mode (CCM) and discontinuous current mode (DCM). Accordingly, a combination of PI controller, repetitive controller and duty-ratio feedforward control, as an improved control strategy, was proposed. On one hand, the intervention method of duty-ratio feedforward compensation can effectively eliminate the zero-crossing distortion in AC current. On the other hand, the repetitive controller gives a fiercer attenuation of AC current harmonics and has a better ability to deal with the grid voltage interruption. System modeling, parameter design and stability verification were also carried out. Finally, simulation and experiment verified the proposed control strategy.

Key words： Vienna rectifier duty-ratio feedforward repetitive control PI controller continuous current mode

Received: 02 December 2019

PACS:

TM461

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	Yang Di
	Yao Gang
	Zhou Lidan

Cite this article:

Yang Di,Yao Gang,Zhou Lidan. An Improved Control Method of 4-Wire Vienna Rectifier Considering Power Fluctuation[J]. Transactions of China Electrotechnical Society, 2021, 36(2): 305-319.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191681 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I2/305

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