Solar panel model with MPPT in Simulink - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the solar panel's open-circuit voltage variable.

Simulink

Voc = [1];  % Open-circuit voltage in volts

Drag options to blanks, or click blank then click option'

A21.0

B5.0

C15.0

D30.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a current value instead of voltage.

Choosing a voltage too low for open-circuit condition.

The open-circuit voltage (Voc) is typically around 21 volts for this solar panel model.

2fill in blank

medium

Complete the code to calculate the solar panel current using the diode equation.

Simulink

Iph = [1];  % Photocurrent in amperes
I = Iph - I0 * (exp((V + I*Rs) / (nVt)) - 1) - (V + I*Rs) / Rsh;

Drag options to blanks, or click blank then click option'

A0.5

B5.0

C3.5

D10.0

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing photocurrent with saturation current.

Using a value too high for typical solar panels.

The photocurrent (Iph) is the current generated by sunlight, here 3.5 A is typical under standard test conditions.

3fill in blank

hard

Fix the error in the MPPT algorithm update step.

Simulink

dV = V - V_prev;
dP = P - P_prev;
if dP [1] 0:
    if dV > 0:
        V_ref = V_ref + deltaV;
    else:
        V_ref = V_ref - deltaV;

Drag options to blanks, or click blank then click option'

A==

B<=

C>=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using equality or less than instead of greater than.

Not comparing dP correctly causing wrong voltage updates.

The MPPT algorithm adjusts voltage reference only if power change (dP) is positive, so the condition should be dP > 0.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps voltage to power for voltages above 10V.

Simulink

power_map = {V: V[1]I for V, I in measurements.items() if V [2] 10}

Drag options to blanks, or click blank then click option'

A*

B+

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition instead of multiplication for power.

Filtering voltages less than 10 instead of greater.

The power is voltage times current (V * I), and we filter voltages greater than 10 volts.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that stores power for voltages above 15V and currents below 5A.

Simulink

filtered_power = {V[1]I: I[2]V for V, I in data.items() if V [3] 15 and I < 5}

Drag options to blanks, or click blank then click option'

A*

B+

C>

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using multiplication instead of subtraction or addition.

Incorrect voltage filtering condition.

The dictionary keys are voltage minus current (V - I), values are current plus voltage (I + V), filtered for voltage > 15 and current < 5.