Why am I getting an error using PV array block with P+O MPPT and boost converter in simulink? (algebraic loop error)

I'm trying to create a simulink model using the built in PV array connected to a P+O MPPT method which feeds the duty cycle into a boost converter. When running this error comes up:

Simulink cannot solve the algebraic loop containing 'PV_final_1/PV Array1/Diode Rsh/Product5' at time 0.00014 using the LineSearch-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues.

Error doesn't always come up, only with certain setting in the PV array.

I have included photos of the whole model, and the MPPT method.

[Aveek Podder]

Could you please share the model with the required settings in PV array?

[Praveen Kumar]

Did you get the solution to overcome this?

Answer 1

[Seyma Biskin]

Hello, Have you solved this problem. I am using Incremental Conductance MPPT method and using PWM signal output to feed the dc-dc boost converter and getting this error:

An error occurred while running the simulation and the simulation was terminated Caused by: Simulink cannot solve the algebraic loop containing 'micro_grid_last/PV Array/Diode Rsh/Product5' at time 0.028926999999999998 using the TrustRegion-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues. To rule out solver convergence as the cause of this error, either a) switch to LineSearch-based algorithm using set_param('micro_grid_last','AlgebraicLoopSolver','LineSearch') b) reducing the VariableStepDiscrete solver RelTol parameter so that the solver takes smaller time steps. If the error persists in spite of the above changes, then the model is likely ill-defined and requires modification.

Almost same with yours. I will be grateful if you can share any info that can help to solve this frustrating problem. Thank you in advance.

[Guo Ludeng Guo]

Try to reduce the simulation step size.

Answer 2

[sdas sda]

Hello,sir. Have you solved this problem.I met the same problem in Pv simulink. I will be grateful if you can share any info that can help to solve this. Thank you in advance. I hope you solve this problem.sir