Dynamic ELD with Valve-Point Effects Using Biogeography-Based Optimization Algorithm

Abstract

The paper focuses biogeography-based optimization (BBO) algorithm for solving the dynamic economic load dispatch problem (DELDP) of dispatchable units considering valve-point loading effects. BBO is a new biogeography-inspired optimization algorithm. Mathematical equations describe creation of species, movements from one habitat (island) to another and to get extinct. This algorithm follows two steps such as migration and mutation. The proposed method calculates economical schedule of units to satisfy load demand and ramp rate limits during operation to minimize total production cost. BBO search technique determines the global optimum dispatch solution. Various constraints like load balance constraints, operating limits, valve-point loading, ramp rate, and network loss coefficient are incorporated. The nonlinear nature of the generators in test system is considered to illustrate the effectiveness of the proposed method. The robustness of the methodology has been validated by demonstrating and comparing with previously developed techniques discussed in the literature.