A. Convert the system data to per unit on a 100 MVA base. Use the voltage of generator 1 as the base voltage. Present your results in a table.
B. Develop the YBus matrix for the system, with the transformer phase shifts included.
C. Build the system using PowerWorld Simulator including the transformer phase shifts. Set your slack bus as Bus 1, and set the angle to be –30 degrees. Solve the power flow, and compare your results with the values given in table
2. Treat this as your base case system. Display the same data fields for all subsequent power flow results.
D. Compare the YBus matrix obtained from PowerWorld with the one you developed in part B.
E. Lower Pgen2 to 0.7 per unit. Try lowering it to 0.5 per unit. What do you think would happen if the generator was taken off line? This is not the same as lowering Pgen2 to zero. Comment on your results especially the voltage magnitudes and the total losses. Explain what would be different if you simply set Pgen2 = 0 in the simulation and how this will impact the results.
F. Starting from the initial operating condition of part A., change the voltage setpoint of generator 1 in 0.01 pu steps until all of the bus voltages are greater than 0.95 pu and list the power flow results.
G. Starting from the initial operating condition of part A., add a shunt capacitor at BUS 3 and determine the Mvar rating to bring all of the bus voltages up to at least 0.95 pu. What is the actual Mvar supplied by the capacitor? List your power flow results.
H. Repeat part G. with the capacitor instead added at BUS 4. Which case requires a least Mvar rating for the capacitor? List your power flow results.