Stream rolling mill, rectification work load frequency equipment to produce large amounts of harmonic currents, the traditional reactive power compensation device (capacitor banks) can not resist and eliminate interference due harmonics, can not properly put into operation, even if the capacitor cabinet can be put into operation Insurance also appear to burn, burst capacitors, etc. in short, very dangerous. And the power factor is generally low (typically between 0.6 to 0.7), a serious waste of energy, a huge monthly electricity bill fines. If you do not control, then in addition to a direct impact on the economic benefits will seriously affect the plant's power grid and the safe operation of sensitive loads. The company's harmonic control device can effectively solve these problems, both harmonic and can control reactive power compensation, harmonic pollution and can solve improve power factor, the obvious economic benefits, and can recover the investment cost in about three months.