基于LCL的风电并网逆变器无传感器控制

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Abstract For the resonance problem of LCL filter, it is needed to increase the number of sensors to detect capacitor voltage or the capacitor current signals, which enhances the control costs and reduces the reliability of the system. In view of this, the core ideal of the virtual flux observing and the mathematical model of LCL-GCI are analyzed and then the sensor-less control technology without grid and capacitor voltage sensors for LCL-GCI is presented. The active damping control of LCL-GCI is realized using the capacitor current feed-forward which is fetched by the LCL capacitor observer in the case of only detecting the converter current and DC-link voltage. In the design of observer, the low-pass filter is used to replace the pure integrator to obtain strong ability of anti-load disturbances. Experimental results show that the voltage sensor-less control technology can observer the grid voltage and capacitor voltage precisely, make the system working steadily and has good anti-disturbance ability, and decrease the numbers of used sensors, reduce the system control cost and has great application values.

Key words： LCL filter wind grid connection inverter(GCI) voltage sensor-less control virtual flux observing

Received: 08 June 2011 Published: 27 November 2013

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TM461

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	Articles by authors
	Wang Han
	Dou Zhenlan
	Zhang Jianwen
	Cai Xu

Cite this article:

Wang Han,Dou Zhenlan,Zhang Jianwen等. Study on Voltage Sensor-less Control for Wind Grid Connection Inverter with LCL Filter[J]. Transactions of China Electrotechnical Society, 2013, 28(1): 188-194.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1/188

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