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Environmental Economic Dispatch constrained by voltage stability using PSO

Traditionally economic load dispatch is done for minimizing generation cost while maintaining set of equality and inequality constraints. On the other hand, the fossil fuel plants pollutes environment by emitting some toxic gases. Thus conventional minimum cost operation can not be the only basis for generation dispatch; emission minimization also is to be taken care of. These two objectives are conflicting and noncommensurable. In this paper we have proposed a multiobjective optimization method using fuzzy decision satisfaction method while the objectives are minimized using particle swarm optimization. While minimizing the objectives voltage stability margin is also maintained. Simulation results for IEEE 30 bus network are presented to show the effectiveness of the proposed method.