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This paper proposes a multiloop controller with voltage differential feedback, and with output voltage decoupling and output current decoupling by only using the output voltage feedback. The output voltage differential feedback loop actively damps the output LC filter resonance and thus increases the system stability margin. The decoupling of output voltage and current makes the inner loop equivalent...
The grid-connected inverter works as a controlled current source in grid-connected mode, while operates as a controlled voltage source in standalone mode. So in case of utility faults or intentional islanding, the inverter has to change its control strategy from current control to voltage control. This paper first proposed a multi-loop voltage controller with capacitor differential voltage feedback...
In this paper, voltage mode (VM) and current mode (CM) control are used for controlling the peak dc-link voltage of high-performance Z-source Inverter (ZSI), where the peak DC-link voltage is estimated by measuring the input and capacitor voltages. Both controllers are designed base on small signal model using Bode diagram. The performance of both control methods is verified by simulation of a 30...
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