PV MPPT Tracking Failing PV Array Current or Volatge Goes negative

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I am trying to simulate P&O alogrithm on Simulink but the MPPT Controller is failing to track MPP along PV Curve.
Sometimes the voltage output of PV Array goes negative while the current output of PV Array goes negative.
Kindly advice how do I resolve this.

Accepted Answer

Pat Gipper
Pat Gipper on 15 May 2022
Hi Ishaan. I found that a perturbation of 1% (Constant2 with value of 1) was too large in the controller. If you reduce the Constant2 to 0.000025 then the PV Array voltage will increase to 35V and produce output power of 60W.

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