Power Quality Solution for Steel Industry

• Rolling Mills:

        The drive systems of rolling mills generate harmful characteristic subharmonics, primarily odd harmonics such as 5th, 7th, 11th, and 13th. Frequent starts also lead to a reduced power factor. Due to the skin effect and proximity effect of harmonics, this causes heating of cables, increased transformer noise, and higher losses. Harmonics may also trigger issues such as oxygen production equipment tripping, switch misoperation, motor burnout, frequency converter trips, protection device malfunctions, and generator rotor overheating.

• Electric Arc Furnace:

        The operation of electric arc furnaces causes voltage fluctuations and flicker, with significant reactive power changes. This leads to a reduced power factor and three-phase imbalance, while generating a large amount of harmonics, mainly the 5th, 7th, 11th, and 13th. These harmonics can induce torsional oscillations in nearby large units and cause voltage fluctuations in the power system grid.