The objective of this paper is to develop a
MATLAB program to calculate voltages magnitude, angle of
voltage, active and reactive power at each bus for IEEE 9,
IEEE 14 bus, IEEE 30 and IEEE 57 bus system. At first
IEEE 9 bus system MATLAB program is executed with the
input data then IEEE 14, IEEE 30 and IEEE 57 bus is
executed with the input data. This type of analysis is useful
for solving the power flow problem in different power
systems which will useful to calculate the unknown
quantities. Simulation is carried out using MATLAB for test
cases of IEEE 9-Bus, IEEE 14-Bus, IEEE 30-Bus and IEEE
57-Bus system. The simulation results were compared for
number of iteration and tolerance value. The compared
results show that Newton-Raphson is the most reliable
method because it has the least number of iteration and
converges faster.
In the load flow analysis methods simulated, the tolerance
values used for simulation are 0.001 and 0.1 for all the
simulation carried out except for the IEEE 57-bus using
the fast decoupled method, which did not converge with
the tolerance values. This explains why the Fast
Decoupled method is not as accurate as Newton-Raphson
method because a lower tolerance value of 0.1 was used to
carry out the simulation for the IEEE 57-bus Fast
Decouple Method.
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