The general peculiarities of electricity demand formation on the Ukrainian market are considered and the place of consumer demand aggregation is determined. Formulated requirements for organization of the demand aggregation potential estimation in different electricity market segment and the estimation algorithm has been proposed. In the context of limited information, a rapid analysis is proposed to evaluate the aggregate potential of demand aggregation in the electricity market. The efficiency criterion for power consumption management potential use as an indicator of efficiency at the express analysis of the consumer group is offered. The results of the calculations allow the aggregator to decide on their projected potential capabilities at the stage of the appropriate "portfolio of consumers" formation and if necessary, to deepen the research level of individual consumers groups. The proposed approaches will also allow power market aggregators to manage electricity consumption, attract private investment and increase competition.