- C. Tsanev, C. Tsvetkova, Power quality, Avangard Prima, Sofia
This article examines issues related to power quality and generation of higher harmonics in single-phase transformers of low power supply, supplying electricity to household, office and industrial equipment. Generation of higher harmonics of these transformers was simulated on basis of the results of the Finite Element Method (FEM) analysis of the magnetic field. Harmonic composition of the current in the primary side was determined using a Fourier transform applied to the curve of the current obtained through the FEM analysis. The results were fully confirmed by the experimental study of the harmonic composition of the current in the primary side of the investigated one-phase transformer. The used approach is unique, and it enables manufacturers to explore the harmonic composition during the design stage, and take appropriate measures to reduce their magnitude.