The Optimal Placement of Capacitor in Order to Reduce Losses and the Profile of Distribution Network Voltage with GA, SA

Most of the losses in a power system relate to the distribution sector which always has been considered. From the important factors which contribute to increase losses in the distribution system is the existence of radioactive flows. The most common way to compensate the radioactive power in the system is the power to use parallel capacitors. In addition to reducing the losses, the advantages of capacitor placement are the reduction of the losses in the release peak of network capacity and improving the voltage profile. The point which should be considered in capacitor placement is the optimal placement and specification of the amount of the capacitor in order to maximize the advantages of capacitor placement. In this paper, a new technique has been offered for the placement and the specification of the amount of the constant capacitors in the radius distribution network on the basis of Genetic Algorithm (GA). The existing optimal methods for capacitor placement are mostly including those which reduce the losses and voltage profile simultaneously. But the retaliation cost and load changes have not been considered as influential UN the target function .In this article, a holistic approach has been considered for the optimal response to this problem which includes all the parameters in the distribution network: The price of the phase voltage and load changes. So, a vast inquiry is required for all the possible responses. So, in this article, we use Genetic Algorithm (GA) as the most powerful method for optimal inquiry.

Authors:

• Limouzade E.
• Joorabian M.

Keywords:

• Genetic Algorithm (GA)
• capacitor placement
• voltage profile
• network losses
• Simulating Annealing (SA)
• distribution network.

References:

[1] Capacitor Subcommittee of the IEEE Transmission and Distribution
Committee, Bibliography on power capacitors 1975 - 1980, IEEE Trans.
Power Apparatus and Systems, vol. 102 , no. 7, pp. 2331-2334,
July1983.
[2] Ng H.N., Salama M.MA., and Chikhani A.Y., Classification of
Capacitor Allocation Techniques, IEEE Trans. Power Delivery, Vol. 15,
No.1, 2000.
[3] IEEE VAR Management Working Group of the IEEE System Control
Subcommittee, Bibliography on reactive power and voltage control,
IEEE Trans. Power Systems, vol.2, no. 2, pp. 361-370, May 1997.
[4] N.M. Neagle and D.R. Samson, Loss reduction from capacitors on
printary feeders. AIEE Trans., vol.75, pp. 959, Oct. in - stalled 1956.
[5] Optimal capacitor placement in radial distribution networks, IEEE Trans.
Power system, Vol.16, No.4, November 2001.
[6] A. Dwyer, The use of shunt capacitors applied for line loss savings, in
Proc 1992 CEA Conference, Apr. 1992.
[7] M.Chis , M.M. A. Salams , and Jayaram , Capacitor placement in
distribution systems using heuristic search strategies, IEE Proceedings
Generation, Transmission and Distribution, vol. 144, no.2, pp. 225-230,
May 1997.
[8] K.N. Miu, H.D. Chiang, and G. Darling, Capacitor placement , and
control in large scale distribution system by a GA - based re - placement
two - stage algorithm, IEEE Trans. Power System, vol. 12, no.3, pp.
1160 - 1166, Aug.1997.