基于无源性的光伏并网逆变器电流控制

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Abstract In view of the nonlinear mathematical model of the photovoltaic(PV) grid-connected inverter, the passivity-based control(PBC) is adapted for the inverter, and it can make the inverter possess excellent dynamic and static characteristics. In this paper the control law that can decouple dq axis currents at AC side of the grid based on the Euler-Lagrange(EL) model, and the passivity of inverter is proved. In order to improve the dynamic performance of the inverter, we can adopt the approach called injecting damping to optimize the controllerps adopted, and it can also make the current to fast track the desired one and track the PV array maximum power point. Simulation and 4kW prototype results show that the current control strategy of Photovoltaic grid-connected inverter based on passivity is practicable.

Key words： PV grid-connected inverter passivity-based control injecting damping decoupling

Received: 07 December 2011 Published: 20 March 2014

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TM464

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	Wang Jiuhe
	Mu Xiaobin

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Wang Jiuhe,Mu Xiaobin. Current Control Strategy of Photovoltaic Grid-Connected Inverter Based on Passivity[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 176-182.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I11/176

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