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A novel and practical multi-loop control strategy for photovoltaic (PV) inverters is presented. In which the double close-loop control structure of digital PID voltage and current instantaneous value is adopted based on the cross feedback decoupling control and load current feed-forward control. In addition, in order to improve accuracy of output voltage, a close loop control structure of the output...
In this paper, a small signal model of hysteretic current mode control with variable frequency and fixed hysteretic band is presented, based on three terminal averaged switch cell of buck converter in continuous current mode. This model reveals that the averaged current is the control target of hysteretic control. And phase lag of current loop with high switching frequency is quite small that makes...
This paper extends the efforts on behaviorally modeling dc-dc power stages to modeling three-phase converters. By equating both the Y- and delta-connection of three-phase sources/loads to a new connection mode, which is suitable for calculating the generated/consumed power, this paper proposes the power transfer model respectively for three-phase boost rectifiers and three-phase voltage source inverters...
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