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The article examines the impact of the correct choice of power and operation of electric drives on the supply network, energy indicators of power supply systems, their energy efficiency based on real measurements at existing installations, as well as the technological process, also provides recommendations for eliminating negative influences and consequences, as well as a way to eliminate them. [ABSTRACT FROM AUTHOR]

The article presents the main advantages of the prospects for the use of frequency energy converters in power supply systems and electrical equipment of induction installations. It is shown that the converter is a universal energy source and in the future can become energy-efficient power sources, with a complete transition from traditional to new energy sources, with further displacement of transformer systems. A comparative analysis with a transformer-furnace controlled system is calculated and their main advantages are given, which converts the supply voltage with a standard frequency into a single-phase voltage (or current) with the optimal frequency required for energy-efficient melting. [ABSTRACT FROM AUTHOR]

The article considers the application of a new method for calculating stationary and non-stationary thermal modes and parameters of an induction installation using the method of equivalent thermal circuits used to create energy-efficient control systems for operating modes of an electric furnace. Due to the identity of thermal circuits with linear electrical circuits, made with appropriate assumptions, for these circuits, the article uses the method of equivalent transformation of linear electrical circuits with the elimination of unknowns, which allows reducing the number of thermal bodies under consideration to a minimum. In this case, thermal conductivity and heat transfer are transformed as passive elements of a linear electric circuit, and losses and thermal capacities are active elements. The task of using the method of equivalent thermal circuits is the synthesis of an automatic control system for the thermal regime of an induction furnace, which boils down to the development and hardware implementation of an algorithm that provides optimal control of the melting of the charge using a mathematical model of an induction furnace. [ABSTRACT FROM AUTHOR]