Buck-Boost converter circuit is short circuited, How?

Question

I am trying to implement a variable load using a controlled current source which varies according to the input voltage and current. further I am trying to implement MPPT control to control the duty cycle to obtain maximum power output in my model. I am however facing a zero voltage output in my simulation, thus zero power output. I am not sure where the error is in my simulation, any help would be appreciated.

Comments

The model file you attached references a Test_Data file. Could you upload that as well?  Could you also reference the simulation time at which you receive the error message?

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Hi, The model runs fine. It is that the output voltage drops to zero immediately when the simulation starts. I have attached the test_data file. Its a csv file containing the irradiation data for a day.

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It looks like the controls aren't regulating their output well.  We can see the PV input voltage collapse and the converter duty cycle saturate.   I would recommend testing each part of your overall system independently to make sure it operates as expected.