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.
