i want constant voltage output with varying irradiance in PV Array model, which is not happening in my model. how can i correct it.plz help

i have used boost converter after pv array with output voltage at 300V with 10 KW PV capacity

Answer 1

[Kothuri]

Hi Himanshu,

To maintain a constant output voltage from PV array with varying irradiance, we generally use a boost converter. But under varying irradiance condition if the output voltage is not constant, you can

• Implement MPPT (Maximum Power Point Tracking) to ensure that the PV array operates at the Maximum Power Point irrespective of the irradiance.
• You can refer the below link for the implementation of MPPT for a PV array
• https://www.mathworks.com/discovery/mppt-algorithm.html
• Implement a voltage control loop using a PI (Proportional Integral) controller so that it controls the duty cycle of the boost converter based on the difference between the desired and actual output voltages.
• You can refer the below link for implementing MPPT for a PV array with Boost converter.
• https://www.mathworks.com/help/sps/ug/solar-pv-system-maximum-power-point-tracking-using-boost-converter.html
• Verify the component ratings of the boost converter are suitable for 10kW capacity and 300V output voltage.

In this way you can obtain a constant output voltage under varying irradiance.