DC injection control for grid-connected inverters based on virtual capacitor concept

DC injection is a critical issue in the distributed generation systems according to IEEE Std. 1547-2003. Unfortunately, few literatures discuss this problem. In this paper, a novel control strategy is proposed to achieve zero steady-state DC injection. The proposed idea stems from a well-known fact...

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Hauptverfasser: Guo Xiaoqiang, Wu weiyang, Gu Herong, San Guocheng
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Wu weiyang
Gu Herong
San Guocheng
description DC injection is a critical issue in the distributed generation systems according to IEEE Std. 1547-2003. Unfortunately, few literatures discuss this problem. In this paper, a novel control strategy is proposed to achieve zero steady-state DC injection. The proposed idea stems from a well-known fact that a capacitor can block DC component naturally. Generally, this capacitor should be large enough to avoid excessive losses of the grid-connected inverter system. In this paper, this large and costly capacitor is replaced with the proposed control strategy. So it is called virtual capacitor. Theoretical analysis and simulation results confirm the concept.
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Unfortunately, few literatures discuss this problem. In this paper, a novel control strategy is proposed to achieve zero steady-state DC injection. The proposed idea stems from a well-known fact that a capacitor can block DC component naturally. Generally, this capacitor should be large enough to avoid excessive losses of the grid-connected inverter system. In this paper, this large and costly capacitor is replaced with the proposed control strategy. So it is called virtual capacitor. Theoretical analysis and simulation results confirm the concept.</abstract><pub>IEEE</pub></addata></record>
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Capacitors
Circuit faults
Control systems
Costs
Distributed control
Mathematical model
Pulse width modulation
Pulse width modulation inverters
Steady-state
Voltage
title DC injection control for grid-connected inverters based on virtual capacitor concept
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