Magnetic control type arc furnace transformer device

Abstract

The invention relates to a magnetic control type arc furnace transformer device. The device is characterized in that the device comprises two parts, namely an arc furnace transformer and a magnetoresistor, wherein the primary winding of the arc furnace transformer is firstly connected with the magnetoresistor in series and then connected in a power supply system through a high-voltage load switchand an isolating switch. As the magnetoresistor is connected in the device, the consumption of electricity of the device can be increased and the occurrence of flicker can be inhibited. The output current of the device has good stability, the smelting time is reduced, and the energy consumption of each ton of molten steel is lowered. The device is also provided with an automatic control system and an automatic recording system, the systems are easy to operate, have high reliability and can realize remote monitoring. The magnetic control type arc furnace transformer device is characterized by high flicker-inhibiting ability and fast response speed, and is an arc furnace power supply device with obvious environmentally friendly characteristic and intellectualization.

Description

technical field [0001] The invention relates to a power supply equipment for iron and steel smelting, in particular to a complete set of magnetron electric arc furnace transformer. Background technique [0002] In the process of iron and steel smelting, the electrodes are often short-circuited or open-circuited due to the collapse of the charge and other reasons. This special working characteristic will cause a series of adverse effects on the electric arc furnace transformer and power supply system. Mainly manifested in: [0003] 1. Cause three-phase unbalance [0004] The short circuit or open circuit of the electrodes will cause three-phase unbalance, cause a huge current impact on the electric arc furnace transformer, cause the instantaneous voltage rise and fall of the power supply system, reduce the stability of the output voltage of the power supply system, and affect the normal power consumption of other users. [0005] 2. Generate a lot of harmonics [0006] The ...

AI Technical Summary

Problems solved by technology

[0004] The short circuit or open circuit of the electrodes will cause the three-phase unbalance, causing a huge current impact on the electric arc furnace transformer, causing the instantaneous voltage rise and fall of the power supply system, reducing the stability of the output voltage of the power supply system, and affecting the normal power consumption of other users

[0005] 2. Generate a lot of harmonics

[0006] The three-phase imbalance causes the arc impedance to be unstable, so that the current waveform no longer changes regularly, and a large number of harmonics appear. The total harmonic distortion rate in the electric arc furnace working system exceeds 5% of the national standard. Reaching 25%, the power grid system suffers a lot of harmonic pollution and makes voltage distortion more complicated

[0007] 3. Cause voltage fluctuation and flicker

These requirements not only increase the difficulty of manufacturing the transformer, but also increase the cost of the system, and the above-mentioned problems in the operation of the electric arc furnace have not been solved.

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