DOI: 10.24411/2076-6785-2020-10120
Abstract
The loss of electricity in electric installations of electrical networks and power supply systems is, from the point of view of energy conservation law, the inevitable energy and economic costs of ensuring the physical essence of the above technological processes. In modern conditions, the loss of electricity and power can be reduced by using the following innovative solutions in power transformer designs: the use of the superconductivity effect of low- and high-temperature, the introduction of new efficient methods for the formation of the main magnetic flux by means of amorphous ferromagnetic materials and the use of combined structures of power transformers combining the above the solution. In the article, the simulation of a traditional power transformer (TPT) and a transformer with an amorphous magnetic core (ACT) in the Ansys Maxwell software package is carried out. The values of active power losses due to eddy currents, as well as the distribution patterns of the magnetic field strength and magnetic induction are obtained. Experimental calculations of the dependence of the characteristics of a transformer with an amorphous steel core on the ambient temperature, taking into account the location of the magnetic circuit in a cryogenic medium, have been carried out. The use of amorphous steel in the design of the magnetic circuit will reduce the no-load losses. A positive effect has been proven when an amorphous magnetic core operates at low temperatures.
Materials and methods
In the Ansys Maxwell software package, the finite element method was used to calculate the active power losses due to eddy currents in the core of a traditional power transformer (TPT) and a transformer with an amorphous magnetic circuit (ACT). An experimental analysis of the amorphous magnetic circuit current characteristics dependence on temperature is carried out, including taking into account the location of the magnetic circuit in a cryogenic
medium. A meander was used as an input signal; the characteristics were taken with a digital oscilloscope.
Keywords
transformer, power saving, slips, energy efficiency, amorphous magnetic materials, high-temperature superconductor materials
