Abstract

Capacitor placement problem is a non-linear and non-differentiable mixed integer optimization problem with a set of equality and inequality constraints. Most conventional optimization techniques are incapable to solve this hard combinatorial problem. The radial distribution systems are unbalanced because of single-phase, two-phase and three-phase loads. Thus, load flow solution for balance radial distribution networks will not be sufficient to solve the unbalanced case and, hence, special treatment is required for solving such networks. Optimal capacitor placement can result in system loss reduction, power factor correction, voltage profile improvement, and feeder capacity release. In this paper, Particle Swarm Optimization (PSO) based approach is used to achieve optimal capacitor placement for balanced and unbalanced radial distribution systems. The size of capacitors can be determined by using particle swarm optimization algorithm. In this fitness function is to maximize the net savings. In order to obtain the fitness values, load flow calculations has to be carried and capacitor placement is almost certain that better loss reduction can be obtained. The proposed solution method employs to search for optimal locations, types, and sizes of capacitors to be placed and optimal numbers of switched capacitor banks at different load levels. The proposed approach has been implemented and tested on various test systems with promising results.

 Keywords: Capacitor placement, load flows, radial distribution system, Discrete Particle swarm optimization (DPSO)

(P1110804005, 668 KB) 

Biography:

J.Viswanatha Rao obtained his B.Tech degree in Electrical & Electronics Engineering from J.N.T.University in 1997.He obtained his M.Tech degree in Electrical power system from J.N.T.University.He is working as an Associate Professor in the department of Electrical and Electronics Engineering in Swarnandhra College of Engineering and Technology.Narsapur-534275.His areas of interest are Power systems, Electrical Distribution Systems,Particle Swarm Optimization application to Distribution Systems.

Dr.S.Sivanagaraju received his Masters degree in 2000 from IIT, Kharagpur and did his Ph.D from J.N.T.University in 2004.He is currently working as associate professor in the department of Electrical Engineering. J.N.T.U.College of Engg. (Autonomous) Anantapur, Andhra Pradesh,India. He had received two national awards (Pandit Madan Mohan Malaviya memorial prize award and Best paper prize award) from the institute of engineers(India) for the year 2003-04.He is referee for IEE Proceedings-Generation Transmission and Distribution and International journal of Emerging Electrical Power System.He has 40 publications in National and International journals and conferece to his credit. His areas of interest are in Distribution Automation,Genetic Algorithm application to distribution systems and power system.

BibTex

(P1110804005, 668 KB)