Measurement device and measurement method of electrode impedance of three-electrode electric furnace

Abstract

The invention discloses a measurement device of the electrode impedance of a three-electrode electric furnace. The measurement device comprises a current measurement device, a voltage measurement device and a controller. The current measurement device comprises a first current transformer, a second current transformer and a third current transformer, the currents of three electrodes of the electric furnace are measured through the first current transformer, the second current transformer and the third current transformer respectively, and the first current transformer, the second current transformer and the third current transformer are connected in a triangular mode and arranged corresponding to the three electrodes respectively. The voltages of the three electrodes are measured through the voltage measurement device, and the voltage measurement device is respectively connected with the three electrodes. The controller is respectively connected with the current measurement device and the voltage measurement device, and the impedances of the three electrodes are respectively measured through the controller according to the currents and the corresponding voltages of the three electrodes. According to the measurement device, the accurate current values of the electrodes can be measured under the condition that loads are unbalanced, then the accurate impedance values of the electrodes are obtained, influences of short net tail end wiring are eliminated, and accurate judgment on and accurate control over the inserting depths of the electrodes and the power of the electric furnace are achieved. The invention further discloses a measurement method of the electrode impedance of the three-electrode electric furnace.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a device for measuring electrode impedance of a three-electrode electric furnace and a method for measuring the electrode impedance of a three-electrode electric furnace. Background technique [0002] Electric furnaces are widely used in smelting processes, and the accurate measurement of electrode impedance has a crucial impact on judging the insertion depth of electrodes and controlling the power of electric furnaces. In the prior art, the output of the corresponding current transformer of each winding of the electric furnace transformer is usually directly used to detect the current of the corresponding electrode, so as to obtain the electrode impedance value. [0003] However, the disadvantage of the prior art is that the end of the electric furnace short net generally adopts a triangular connection mode. Only when the loads of the three electrodes are balanced, the measur...

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Problems solved by technology

[0003] However, the disadvantage of the prior art is that the end of the electric furnace short net generally adopts a triangular connection mode. Only when the loads of the three electrodes are balanced, the measured electrode impedance value is accurate. In other cases, the measurement There will be deviations in the obtained electrode impedance value, so that the accurate electrode impedance value cannot be obtained

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