Abstract:
In this research, the Federal University of Technology Akure 33/11 kV Injection
Substation Network has been considered under the presence of a distributed generation
(DG). The transformer and line data such as phase voltages, line currents, length of
transmission and distribution lines, line impedances, line reactances and conductor
size were used in the analysis using Newton Raphson Load Flow Algorithm in a
computer software called Electrical Transient Analyzer Program (ETAP 12.6.0). The
obtained results from the simulation show that the present state of the network is not
satisfactory due to low voltage profile, heavy bus loading and high power losses across
the branches of the network. A total power of 7.9 kVA at 0.8 leading power factor was
injected into the system on simulation without the DG out of which a total power loss
of 5.2 kVA at 0.76 leading power factor was observed. The integration of the 50 MW
capacity DG unit at the reference bus (Bus1) reduced the power loss to 4.5 kVA at 0.8
leading power factor; the integration of the DG at optimal location (Bus3) further
reduced the power loss to 4.2 kVA at 0.8 leading power factor. The minimum bus
voltage of 2.91% was recorded with DG, 2.50% without the DG and 2.97% with the
DG at the optimal searched location. The range of voltage deviation was found to be
between 2.19% and 13.57% at the 11/0.415 kV substations
