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A control strategy for LCL Grid-connected voltage source converters is proposed. With only grid feedback current control, the proposal allows the use of the proportional plus resonant regulator (PR) optimal design, regardless of the filter resonant frequency. To prove its feasibility, the controller is simulated in a realistic system for different values of resonant frequency. In addition, its superiority...
In this paper, a current controller for an inverter connected to the grid through an LCL filter is proposed. Unlike classical active damping schemes, it is proposed to implement the controller by measuring the injected current only. It can be done irrespectively of the filter resonance frequency. In addition, it is possible to place the closed-loop poles of the system in an arbitrary way. The controller...
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