Economic load dispatch using moderate random search PSO with ramp rate limit constraints

Economic load dispatch (ELD) is one of the important works in the power system operation and control process which deals with allocation of generation among committed units so as to satisfy the energy demand and constraints with reduced fuel cost of generation by appropriate schedule for load dispatch. Number of efforts using various modern heuristic techniques has taken till date to achieve the optimal solution of this problem. Particle swarm optimization(PSO) is one of those techniques (population based) which has already implemented to ELD problems by several researchers to for getting optimal allocation of generation among various generating units with respect to their subject to constraints. In this paper PSO with moderate random search strategy (MRSPSO), has been applied for improving the ability of particles to increase their convergent rate by exploring their solution space more effective. Usefulness of MRSPSO algorithm for solving ELD problem is implemented through six generator system with ramp rate limit constraints and valve point loading effect. The result is compared with other heuristic techniques and is found to be efficient and capable of producing better result.