Possibilities of Increase in Energy Efficiency and Unification of Transformer-Reactor Equipment with Twisted Elements of Magnetic Circuit

Abstract

Increasing energy costs and the need for further energy conservation lead to an increase in the requirements for reducing losses in transformer and reactor magnetic circuits. Traditionally, transformer and reactor equipment is improved by applying the achievements of electromaterials science and new technologies to traditional structures and structures of electromagnetic systems. Recently, the use of amorphous steel strip with coiling technology has been expanding in the production of magnetic cores, which in three-phase versions are made three-circuit combined of elements and are characterized by 33% of additional losses. The improvement of three-phase transformers and reactors with twisted magnetic cores is possible by the method of structural transformations of active parts with magnetic coupling of phase twisted circuit elements. The options, advantages and disadvantages of these transformations are considered. On the basis of the identity of mathematical models and dimensionless indicators of the objective functions of structural and parametric optimisation of identical transformer and reactor designs, it is concluded that it is expedient to unify their electromagnetic systems with magnetic coupling of the twisted elements of jointed magnetic cores.