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I ask the help of electrical engineers. I am developing a model of an MPPT-controller, the model has not yet been completed (only DC-DC, the load and the panel itself are connected). I do it in simulink.

enter image description here

I am very worried about some extremely wild jump in solar panel current to no-load current level.

enter image description here

How can this jump be explained and how can it be eliminated?

The circuit parameters are as follows:

R1=1 Ohm; C1=2e-3 F; L=0.1 H; R=150 Ohm;

I would be glad and grateful for advice and help.

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    \$\begingroup\$ Please elaborate on why you say 'no load', in the diagram above, it appears that you have a filter and a load connected to the filter. Also, if you want to adequately model a physical MPPT control loop, usually a mosfet that switches will be necessary to regulate the voltage. \$\endgroup\$
    – Voltage Spike ♦
    Commented Jul 8, 2021 at 16:51
  • \$\begingroup\$ @VoltageSpike Well, why, I didn't seem to write that there is no load, it is there (Resistor R). Said "the model has not yet been completed (only DC-DC, the load and the panel itself are connected)" That is, it says that the panel, load and filter are connected. As for the transistor: why MOS and not IGBT? \$\endgroup\$
    – ayr
    Commented Jul 8, 2021 at 16:54
  • \$\begingroup\$ @VoltageSpike the model is not finished because mppt control is not connected yet. I am currently working on it. I would like to explain the surge in solar panel current. \$\endgroup\$
    – ayr
    Commented Jul 8, 2021 at 16:55

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