The article provides a theoretical justification for the need to use large-scale electric power storage devices in the power system. The positive effect will be reflected in increased stability of the system, compaction of daily load schedules, more complete use of night tariffs and stabilization of voltage and frequency. An analysis of existing technologies for the accumulation of large volumes of electric power is carried out taking into account their maneuverability characteristics and the degree of influence on the environmental situation in the region of their location. The theoretical justification and feasibility innovations of designing gravity storage power plants (GrSPP) as an object of stabilization of the power system are given. The principles of their operation as an independent object and as an element of “green” energy in the power system are outlined. Estimated calculations are given to identify the feasibility and technological feasibility of using the gravitational method of accumulating potential energy with its subsequent conversion into electrical energy.