四象限级联型变频器PWM整流的数字化控制与实现

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Abstract This paper proposes a control strategy of PWM rectifier for four-quadrant cascade inverter. Firstly, through analysis of the impact of the output power fluctuation of H-bridge inverter on the stability of the DC bus voltage and PWM rectifier control, a self-adjusting notch filter is added to the voltage outer loop. To reduce the impact of the variation of the AC side parameter on the control system, a proportional resonant (PR) controller is implemented to the current inner loop. And then, digital realization of the PR controller and the notch filter with direct form structure based on delta operator are achieved and the design principles of the key parameters are given. Finally, the experimental verification of PWM rectifier and its control strategy has a good four-quadrant performance in steady-state and transient operation under the rectification and inversion.

Key words： keywords：Four-quadrant cascade inverter PWM rectifier proportion resonant control delta operator digital implementation

Received: 20 September 2012 Published: 12 December 2013

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TM461

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	Articles by authors
	Qiu Changqing
	Huang Shenghua
	Li Zhuyan
	Shuang Bo

Cite this article:

Qiu Changqing,Huang Shenghua,Li Zhuyan等. Digital Control and Implementation of PWM Rectifier for Four-Quadrant Cascade Inverter[J]. Transactions of China Electrotechnical Society, 2013, 28(1增): 493-500.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1增/493

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