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Load management activities, even in scenarios characterized by an unbundled electricity market, maintain their potential attractiveness, not just due to operational issues but also because of potential economic benefits. However, multiple incommensurate and conflicting objectives are at stake in the design and selection of load management actions. Evolutionary algorithms, working with a population of potential solutions, are well suited for such multiobjective optimization problems of combinatorial nature. Moreover, when applied to load management programs, they allow both for the design and the selection of control strategies. The combined use of this type of algorithms and adequate load models allows some of the concerns these actions may arise, such as the payback phenomenon, to be taken into account. In the proposed approach, the effects of load control strategies are computed at different demand aggregation levels. This capability and the explicit consideration of multiple objective functions in the mathematical model enable the proposed approach to be used in different possible scenarios related with power systems structure and by different entities.