Effect of Harmonics on Power Transformers: A practical demonstration and analysis

Lect. Munther N. Thiab

College of Engineering / University of Anbar

 https://www.jardcs.org/backissues/abstract.php?archiveid=5903

Voltage and current harmonics arise in the presence of nonlinear loads in the major supply. Moreover, the presence of harmonics is associated with several problems such as cables overheating, induction motor vibration and overheating, as well as augmented losses in the transformers. This study analyzes the particular effects of harmonics on a 1-KVA transformer. The harmonics signal was generated on the transformer by using a frequency oscillator, while the total harmonic distortion, crest factor, and K-factor were investigated using a power analyzer (Fluke-435). The results are analyzed and compared for different orders of harmonics. The results are analyzed and compared for different orders of harmonics, especially with regard to the total harmonic distortion (THD) and k-factor, present standards like IEEE 519 provide a technique to limit the ability of an existing power transformer matter to non-linear load flows based on conservative assumptions