基于电流预测和虚拟过采样的数字滞环控制

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Abstract Current quality is one of the most important requirements of grid-connected converters. Knowing that the hysteresis control is a commonly used method, a basic analysis of the traditional hysteresis control is given first. Then a current prediction and virtual over-sampling based digital hysteresis control algorithm is proposed in this paper for the control of an unsymmetrical multilevel converter. The sampling rate could be lower and the output current quality could be improved compared with the traditional hysteresis control. Simulating comparison of different hysteresis control methods is analyzed, and an experimental prototype is built to validate the proposed algorithm. Simulation and experimental results are given to shown the effectiveness of the proposed algorithm.

Key words： Grid-connected converter current prediction virtual over-sampling digital hysteresis control

Received: 20 April 2012 Published: 05 November 2014

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TM46

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	Articles by authors
	Liu Quanwei
	Deng Yan
	Hu Yihua
	He Xiangning

Cite this article:

Liu Quanwei,Deng Yan,Hu Yihua等. Current Prediction and Virtual Over-Sampling Based Digital Hysteresis Control[J]. Transactions of China Electrotechnical Society, 2014, 29(10): 127-133.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I10/127

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