Model:intermediate frequency furnace filter reactive compensation equipment 1)main function: the filter equipment can make power quality obviously improved, reduce curent impact induced by impact load, voltage function and prevent voltage flash. also strengthen voltage stability and improve voltage quality
Efficiently filter high level harmonic waves and make the waveforms of voltage /current back to sinusoidal.
It timely supply reactive compensation for system, reduce line loss, increase power factor, improve the load margin of transformer , improve power supply quality
2)Performance Adopting WTSF with thyristor dynamic switching to compensate reactive power and filter separetely for 400V, 66V generatrix of transformer two times side for the rolling mill
the dynamic switch adopts advanced big power thyristor with zero passage switching in the 20ms to throw zero voltage difference and cut zero current to ensure no flow spill and impact.
not only it can quickly dynamicly track to compensate reactive power, but also has prevention function for special hypo-harmonic wave produced by load
independent air duct heat-removal system make thyristor remove heat balanced, cooling wind centralized and cooling intensity high ,so that the using efficiency of thyristor is greatly improved with the better effect of whole heat-removal.
3)Characteristics For example, The rolling mill mainly use DC motor. DC transmission equipment belongs to typical thyristor commutation equipment that adopts phase shift , it absorb fine wave of unfilled corner from power network, how ever, it leaves just the sine wave of unfilled corner of the other parts for power network. the leqaving part contains mass of harmonic wave
in case that commutation equipment is a selenium rectifier with three phase fully controlled bridge 6 pulse , the transformer border and supplying line contain odd harmonic current of more than 5 times
in cse selenium rectifier with 12 pulses, it has odd harmonic current of more than 11 times as well
therefore, the commutation equipment will produces 5,7,11,13 high times harmonic wave, generally the total oberration rate of equipment is nearly 30%
the power factor of roling mill load is commonly low and has big fluctaution , that result in very severe reactive loss of transformer and line. this is to the disadvantage of reasonable use of equipment that tripping operation will frequently occur becase of over load
4)characteristic Capacitive reactive power from this equipment will automatically track the sensibility data from load, and make compensation, increase the power factor
very small inductive reactance of reactive equipment apears toward load harmonc wave, device will change the harmonic wave from load flow into reactive equipment intead of uppoer power network through ransformer
Device has stable ability for stabilize the voltage supply, reduce voltage aberration of generatrix and power capcity. Furthermore, the jamming of harmonic wave, temperature of transformer and the loss of power distribution will be obviously reduced.