Transmission line data and bus data

Transmission line data and bus data are given in Tables 1 and 2 respectively. The
transmission line data are calculated on 100 MVA base and 230 (line-to-line) kV base
for generator.
Tasks:

1. Determine the network admittance matrix ?
2. Find the load flow solution using Gauss-Seidel until first iteration by manual
   calculation.
3. Use Maltab software to solve power flow problem using Gauss-Seidel method. Find
   the steady-state values of
   a. The voltage (magnitude and phase angle) at each bus for the specified load
   condition in pu and in kV.
   b. The current (magnitude and phase angle) entering each bus
   c. Generation and load (active and reactive powers) at each bus in MW and
   MVar.
   d. Find the voltage drop on the transmission line (1-5)
   e. Find the active and reactive power losses in the transmission line (1-5)
   f. The total MW and Mvar losses in the system
4. In power system networks, it is desired to keep bus voltages within ± 5% from
   nominal value (1 p.u). Usually, voltage-controlled buses will tend to have higher
   voltages than slack bus while load buses voltage will be less than slack bus. Do
   your results agree with the desired voltage requirements?
5. Assume that load forecast analysis predicts an increase in the power demanded in
   the next five years, in order to meet these demands a new generator rated 420 MW
   is installed at bus 3 to bring the total bus generation to 480 MW. Modify your
   program to calculate power flow in the future. Do all bus voltages fall within the
   allowable limits?
6. One way to regulate bus voltages is to install shunt capacitor banks. Place 20 Mvar
   shunt capacitor bank on the “needed” bus to regulate its voltage and study its effect.
   Determine the active and reactive power losses in the transmission line (1-5).
7. If a three-phase short circuit (bolted fault) occurs at bus 6, determine the bus
   impedance matrix Z by considering the load effect. Now, by considering the
   prefault bus voltages provided by the power flow computer program (calculated at
   Question 6), calculate the fault current ??, the bus voltages during the fault, and the
   active and reactive power losses in the transmission line (1-5) during fault.