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In recent years, a real opportunity to create a capacitive-storage energy source based on supercapacitors with increased energy intensity has appeared. At present, on the basis of supercapacitors, an energy storage device (ES) has been created, and there is an experimental process, the power of which in the model of an electric power system is 10 kW. The level of stored energy is determined by the type of storage device (30 kJ or more). The purpose of the paper is to develop effective methods for increasing frequency, rotor angle based on modern energy storage devices (supercapacitors). The program of Power System Simulation for Engineering (PSS/E) is used in the study. The importance of the work is described in the paper and the features of the impact of using supercapacitors on the stability of frequency and rotor angle by making several experiments with different capacities and voltages and then comparing the results obtained using the PSS/E program are considered. Ensuring the stability of the load schedule at the maximum consumption of electricity in the electric power system of a certain region or country is a long-term procedure that needs to be developed and improved in the means of its implementation. Modern systems have characteristic features, such as an increase in the unevenness of load schedules, the need to generate power from generation facilities in each period of time, an increase in the steepness of load schedules, scaling of power plant equipment, which increase their economic feasibility of operation, reduce their maneuverability, etc. Search and development of new ways and methods for compensating peak loads in the electric power system are relevant and in demand.

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