Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2014.1600.1605MuthukumarK. JayalalithaS. 1220141414Distribution systems are the end nodes that connect the consumers
and the power utility. Power loss in distribution lines are high due to unbalance
loads and unequal conductor sizes, causes a large voltage drop along the feeder
lines. Hence the consumers at end nodes are affected by low voltage problem.
Voltage at different nodes of the distribution network must be controlled by
controlling the reactive power flow. Reactive power can be injected near to
the consumer end by connecting shunt capacitors to reduce the reactive component
of line current and hence voltage drops. Identification of optimal location
and shunt capacitor size renders enhancement in voltage profile, power loss
reduction etc. Evolutionary Programming (EP) approach is adopted to find out
best possible size of the capacitors to be placed for minimizing the active
power loss. Voltage Stability Index (VSI) is computed for all nodes to indicate
the potential point for reactive power compensation. EP uses the fitness function
information directly, instead of its derivatives which makes EP, a highly flexible
and robust when compared with the conventional optimization methods. The proposed
technique is implemented on modified IEEE 13-bus unbalanced radial distribution
system by removing the voltage regulator from the standard IEEE 13 bus test
system.The simulation results shows that the proposed method can reduce power
losses which highlight the capability of the proposed technique for minimizing
the power loss in distribution systems.]]>Eajal, A.A. and M.E. El-Hawary,20102517341741Chakravorty, M. and D. Das,200123129135Kersting, W.H.,19916975985Lee, K.Y. and F.F. Yang,199813101108Ma, J.T. and L.L. Lai,1996143365370Muthukumar, K. and S. Jayalalitha,20122012pp: 393398Sirjani, R., A. Mohamed and H. Shareef,20101029983006Srinivasa Rao, R.,20104461467Subrahmanyam, J.B.V.,200964051Teng, J.H.,200024259264