Based on my understanding, you're experiencing an oscillatory output and low current from your PV array. There could be several reasons for it, here are some potential factors to consider and troubleshoot:
- Simulink solver settings: Check the solver settings in your Simulink simulation. Ensure that the solver type and step size are appropriate for the dynamics of the PV array and the system you are modeling. Using an adaptive solver might help capture the transient behavior accurately.
- Mismatched load: Ensure that the load connected to the PV array is matched properly. A mismatch between the load impedance and the maximum power point of the PV array can cause oscillations. Adjust the load parameters to match the array characteristics for maximum power transfer.
- Incorrect model parameters: Verify that you have inputted the correct model parameters for your PV array. Double-check the values for the array's maximum power point voltage, current, and temperature coefficients. Inaccurate model parameters can lead to unexpected behavior and low output power.
- Inverter control: If you are using an inverter in your simulation, examine the control scheme being applied. Incorrect or unstable control can cause oscillations and low output power. Consider adjusting the control parameters or using a different control strategy to improve stability.
- System grounding: Verify that the system grounding is properly configured in your simulation. Incorrect grounding can introduce noise and instability. Ensure that the PV array and the rest of the system are correctly connected to the ground.
By addressing these potential issues, you should be able to improve the stability and increase the output power of your PV array simulation in MATLAB Simulink. Additionally, try extending the simulation duration to see if the oscillations stabilize eventually. If none of the above-mentioned steps resolve the issue, kindly provide detailed information about the simulating model.
