The impact and harm of harmonics on transformers

The transformer changes the voltage or current through the turns ratio of the winding2 to 3 times that of the generator , and its efficiency is good. Therefore , it is widely used in mine power distribution systems as power and lighting power equipment. . However, due to the large number of uses, its loss problem has become more and more prominent and has become a key issue that must be paid attention to.
High-quality electrical energy is a three-phase symmetrical sinusoidal alternating current with equal voltages, thus ensuring the normal operation of electrical equipment with low energy consumption. However, when the current is disturbed by the outside world, especially when the load contains more nonlinear loads , its own waveform will deviate from the normal value, resulting in the generation of harmonics.
Broadly speaking, any component that is different from the power frequency can be called a harmonic. The impact of harmonics on the power grid cannot be underestimated. When harmonics are large, the current fluctuation range where the original frequency fluctuation is within a small range increases significantly, and the mine power distribution system will be severely affected, causing the transformer to The loss and noise increase, the capacity of the equipment decreases, and the quality of mining power decreases.
At the same time, the high harmonic order and rising frequency can easily cause series and parallel resonance of capacitors and inductors , breakdown of electrical equipment, seriously affecting the normal operation of the system power supply and the personal safety of mining workers. In addition, harmonics will also cause electrical equipment to age faster due to heat and shorten its life. Therefore, harmonic suppression is an essential measure in the power supply system.