On the Methodology for Calculating the Economic Efficiency of Energy Storage Systems

Due to the growth of “green” energy, the need to regulate the load on large power systems, and the development of electric transport, electricity storage systems (ESS) are increasingly, being used in the world. Conceptual documents have been developed in the Republic of Belarus and the Russian Federation stating the need to modernize the regulatory framework for the use of ESS, create scientific support for the development of ESS technologies, centers of competence and of the implementation of pilot projects. This article provides an example of calculating the economic effect of using ESS at an industrial enterprise. A methodology is proposed that can be used to develop standardized methods for calculating the economic effect of using ESS at enterprises and in local energy systems of consumers of various types. The main functions performed by the ESS at the enterprise are characterized. The features of calculating the economic effect of performing these functions under the conditions of the statistical nature of the load regime of the enterprise are considered. Calculations of the simple payback period for investments in the installation of an ESS for an enterprise with several options for payment terms for electricity are given. It is shown that the economic result of using ESS significantly depends on both the pricing conditions and load schedules of the enterprise, as well as on specific requirements for the quality and reliability of power supply and should be evaluated individually in each case.