Hello,
I am working on grid connected single stage PV system. I am going with SRF control (dq-control). what I found more complicated is outer voltage control loop. In outer control loop, Vref (pv array reference voltage) estimated from MPPT algorithm is subtracted from Vpv (measured pv panel voltage) and error is processed by PI controller which provides Igd_ref(reference active grid current). I have tried to find solution in many references but didn't find anything. Please explain the solution and provide a good reference.
Vicky Siraswar I think this paper can help you how to connect voltage and current loops together. Although in this paper it is implemented for three-phase grid-connected inverter. But analogy can be made for single phase grid-connected inverter.
Follow this article "Control and operation of a solar PV-battery grid-tied system in fixed and variable power mode".
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