基于空间矢量调制的星形级联H桥SVG直流侧电压控制方法研究

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Abstract The static var generator(SVG) with cascaded H-bridge structure can dynamically track the change of the reactive load and improve the power quality of the grid.For SVG with H-bridge cascaded structure,the DC voltage control has been a hot topic.Compared to the carrier based modulation method,the space vector modulation method has more applications on the DC voltage and can be more convenient for digital implementation.Therefore,this paper proposes a three layers control system.The first layer is for total active power control.The second layer is for interlayer voltage balance control which use the phase-shifted space vector pulse width modulation(SVPWM) method.The third layer uses the space vector modulation method,through selecting the appropriate redundant states,the DC voltage balance control and reduce of DC voltage fluctuation can be achieved.Lastly the experiments results verify the correctness and validity of the method.

Key words： Cascaded H-bridge SVG space vector modulation(SVPWM) DC voltage control energy function

Received: 06 November 2014 Published: 13 April 2015

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TM464

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	Liu Yunfeng
	He Yingjie
	Yin Shiqi
	Wang Yue
	Liu Jinjun

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Liu Yunfeng,He Yingjie,Yin Shiqi等. Research on DC Voltage Control Based on Space Vector Modulation Method in the Star Connection Cascaded H-bridge SVG[J]. Transactions of China Electrotechnical Society, 2015, 30(5): 23-32.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I5/23

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