DC rolling mill, rectifier frequency conversion equipment and other loads produce a large amount of harmonic current, if not treated, it will seriously affect the power grid and the safe operation of sensitive loads in the power grid, and then such as DC rolling mill and other speed control load power factors are still very low, and reactive power fluctuations are serious, the traditional reactive power compensation device (capacitor cabinet) can not resist and eliminate the interference of harmonics, can not be put into operation normally, power waste is serious. Even if the capacitor cabinet can be put into operation, it will burn the insurance and burst the capacitor in a short period of time, which is very dangerous.
Metallurgical steel detailed solution: DC rolling mill, rectifier frequency conversion equipment and other loads produce a large amount of harmonic current, if not treated, it will seriously affect the power grid and the safe operation of sensitive loads in the power grid, and then such as DC rolling mill and other speed regulation load power factors are still very low, and reactive power fluctuations are serious, the traditional reactive power compensation device (capacitor cabinet) can not resist and eliminate the interference of harmonics, can not be put into operation normally, power waste is serious. Even if the capacitor cabinet can be put into operation, it will burn the insurance and burst the capacitor in a short period of time, which is very dangerous.
User value of reactive power compensation and harmonic governance
Control harmonics, reduce the harmonic current injected into the system, and meet the requirements of national standards;
Dynamic compensation of reactive power, power factor up to standard, avoid fines from power supply companies;
After reactive power compensation, the system supply current is reduced
High transformer capacity utilization;
Energy saving and consumption reduction.
Problems you may be experiencing?
1. The power factor is very low when the DC rolling mill rolls steel, the working cycle is short, the speed is fast, it belongs to the impact load, and the reactive power fluctuation is large;
2. In addition to the low power factor when the DC rolling mill is working, it also produces high-order harmonics, which affects the normal operation of the electrical equipment.
Our Solutions:
1. Using ESBELSVG passive filtering device, design a single-tuned filter channel to filter out the harmonics of the system and compensate for the reactive power;
2. The dynamic safety compensation device MVTS is adopted to meet the requirements of reactive power compensation and harmonic control of impact load, reasonably configure the reactance rate according to the harmonic situation of the system, compensate the reactive power of the system, and make the power factor reach more than 0.95;
3. The active filter ESBELAHPF is used to control the high-order harmonics and the reactive power of the dynamic safety compensation device ESBELSVG compensation system is adopted, and the harmonic reactive power reaches the standard after input;
4. The ESBELmtr dynamic reactive power generator is used to provide reactive power to each phase of the system in the dynamic form, and at the same time control the harmonics of the system.