1.Safely improve power factor, avoid power factor’s examination penalty from power supply department;
2. Save energy and reduce consumption, reduce operation cost
3. Reduce damage from harmonic to electric device, secure the steady operation of distribution device and reactive power compensation device
4. Increase the using efficiency of system capacitance and distribution device
Main electric devices of smelting enterprise are medium frequency electric arc furnace, metal rolling mill, crane; medium frequency electric arc furnace and metal rolling mill is high energy-consumption device, it will produce large 5, 7, 9times harmonic, the power factor is very low. Crane’s operation current varies fast, it produces high harmonic of 5, 7, 9times.
Main electric devices of smelting enterprise are medium frequency electric arc furnace, metal rolling mill, crane; medium frequency electric arc furnace and metal rolling mill is high energy-consumption device, it will produce large 5, 7, 9times harmonic, the power factor is very low. Crane’s operation current varies fast, it produces high harmonic of 5, 7, 9times.
Suggestion is to use fast filter compensation to conduct local harmonic control and reactive power compensation:
1、Use fast filter compensation device, not only can improve power factor, it can control 5, 7, 9times harmonic
2、Use harmonic voltage suppressor to control 5, 7, 9times harmonic voltage