Power transformers supplied by non-sinusoidal voltages or supplying non-linear loads- problems and solutions

Abstract

This article aims to present the power transformers supplied by non-sinusoidal voltages or supplying non-linear loads. A number of factors determine the use of such transformers- the continuous increase of photovoltaic power station, the number of non-linear loads in our homes and industry has also grown significantly over the last decade. On the other hand, more and more consumers need a stable and sinusoidal supply voltage. All these factors pose a number of problems to be solved and affect the operation of the power transformers. The article present the types of non-sinusoidal loads and their influence on the operation of the transformer-increasing the losses and the temperature of the transformer. The types of transformers according to the type of load are presented. Various solutions (with their advantages and disadvantages) to reduce the impact of non-sinusoidal voltages or supplying non-linear loads.