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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 3, May 2009

Issue on Electrical & Electronics

Page(s): 76-80

Simplified Velocity MPSO for Directional Over Current Relay Coordination

D. Vijayakumar and R. K. Nema

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Abstract

Particle Swarm Optimization, a recently more popular optimizer utilizes the swarm behavior in searching for an optimum. The classical/standard PSO (SPSO) algorithm is normally used for unconstrained optimization tasks. The Directional Over-Current Relay (DOCR) Coordination problem is a highly constrained optimization problem, therefore the SPSO in its original form cannot be used to solve it. The reported MPSO deal with constraints using a complex repair algorithm therefore the solution and speed of convergence achieved is not very optimistic. The method employed here provides better results both in terms of the speed of convergence and global optimal solution because of simplified velocity update process in proposed PSO algorithm with simplified cut down approach of constraints handling. Both these modifications are reported in this present work and the results are compared with the already reported MPSO. The method introduced here is known as SV-MPSO and gives very optimistic results in terms of the global best feasible solution with very fast convergence rate.

Index Terms

Over current protection, Relay Coordination, Swarm Intelligence, Linear Programming, Particle Swarm Optimization, Cognitive Behavior

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