Biogeography-Based Optimization (BBO) is a recently developed global optimization algorithm and has shown its ability to solve complex optimization problem. The convergence of original BBO to the optimum value is slow as it lacks the exploration ability. An Accelerated Biogeography-Based Optimization (ABBO) technique is proposed in this paper to solve economic load dispatch problem. In this paper, the performance of the original BBO is accelerated so at to enhance the exploitation and exploration ability by introducing a modified mutation operator and clear duplicate operator. This significantly improves the convergence characteristics of the original algorithm.