VSG系统直流电压快速稳定的控制策略研究

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Abstract To improve the response of rectifier side when the inverter side of voltage sag generator(VSG) simulates that voltage sags,the method of partial feedback linearization is used to design the current inner-loop controller of VSG rectifier side according to the nonlinear characteristic of PWM rectifier model. The variable-speed integral PI algorithm is presented for the voltage outer-loop to reinforce the anti-disturbance ability. A simple open loop controller which can easily realize balanced and partial unbalanced voltage sag fault is designed for the inverter side of VSG according to vector relationship of three-phase voltage. Digital simulation and practical experimental results show that the proposed control strategy has good performance in improving dynamic response speed when VSG system voltage sags, guaranteeing fast regulation and stability of DC-bus voltage and achieving excellent performance.

Key words： Voltage sag generator DC voltage nonlinear control variable-speed integral voltage sag fault

Received: 03 May 2013 Published: 05 November 2014

PACS:	TM712
	TM461

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	Articles by authors
	Meng Jianhui
	Shi Xinchun
	Wang Yi
	Fu Chao
	Kou Wei

Cite this article:

Meng Jianhui,Shi Xinchun,Wang Yi等. Research on a Fast and Stable DC Voltage Control Strategy of Voltage Sag Generator System[J]. Transactions of China Electrotechnical Society, 2014, 29(8): 219-226.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I8/219

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