Procedure for Newton-Raphson power flow

STEP 1: Enter the number of buses in a power system. Then, click on the “Generate Bus Table” and fill the details of buses i.e., Bus Type (Slack Bus = 1, PV Bus = 2, PQ Bus = 3), Voltage magnitude (pu), Angle (degree), P_gen (pu), Q_gen (pu), P_load (pu), Q_load (pu), Q_min (pu), Q_max (pu).

Note: Bus data for two standard IEEE bus systems are provided- (I) IEEE 5-Bus system and (II) IEEE 14-Bus system. To access the data click on the button of Autofill Bus Data: IEEE 5-Bus or Autofill Bus Data: IEEE 14-Bus.

STEP 2: Enter the number of lines in a power system. Then, click on the “Generate Line Table” and fill the details of lines i.e., From Bus, To Bus, R (pu), X (pu), B (pu) (Full line charging admittance), Transformer Tap.

Note: Line data for two standard IEEE bus systems are provided- (I) IEEE 5-Bus system and (II) IEEE 14-Bus system. To access the data click on the button of Autofill Line Data: IEEE 5-Bus or Autofill Line Data: IEEE 14-Bus.

STEP 3: Click on “Calculate Y-Bus”. The values of the Y-Bus matrix will be displayed.

STEP 4: Enter the Tolerance limit value and Maximum allowed iteration. The values for the tolerance limit and the maximum allowed iterations will be set.

STEP 5: Click on “Run Power Flow”. The number of iterations, Buses data: Bus Type, Voltage magnitude (pu), Angle (degree) , P_gen (pu), Q_gen (pu), Pload_load (pu), Q_load (pu), Line flows data: P_line (pu), Q_line (pu), P_loss (pu), Q_loss (pu), Total real and reactive power losses (pu) after convergence will be displayed.
Note: If the power flow does not converge within the maximum allowed iterations, a message will pop up stating, “The power flow analysis did not converge within the maximum allowed iterations”.