Bid-based economic electrical load dispatch using improved genetic algorithm

This paper presented an improved algorithm-Isolation Niche Immune Genetic Algorithm for solving Bid-based Economic Dispatch (INIGA-BED) in a power system. Economic Dispatch determines the electrical power to be generated by the committed generating units in a power system so that the generation cost can minimized, while satisfying various load demands simultaneously. The model of Bid-Based Economic Dispatch is proposed in order to maximize the social profit under the competitive environment of electricity market. This model synthetically considers various constraints on ramp rates, transmission line capacity and polluting gas emission constraints etc. The Isolation Niche Immune Genetic Algorithm was induced as a new solution for this model. With the introduction of niche technology, the capability of the immune genetic algorithm in dealing with the optimization of multi-peak model function was enhanced. This paper proposed the Niche based on Isolation mechanism which possesses with biological basis. It not only effectively ensures the diversity solutions of the group, but also has a strong ability to guide evolution.