A redundant switching control system of thyristor rectifier device under compensation operation in aluminum electrolytic cell

Abstract

The invention discloses a redundant switching control system of a thyristor rectifying device under compensation operation in an aluminum electrolytic cell. The system comprises 1#-3# thyristor rectifying units and a control system, wherein the control system comprises a master dispatch PLC and PLCs of various units; the 1#-3# thyristor rectifying units are connected to a 2# positive bus and a negative bus in parallel; one side of the 1#-3# thyristor rectifying units is provided with a 4# thyristor rectifying unit; the outputs of the 4# thyristor rectifying unit are connected with a 1# positive bus, the 2# positive bus and the negative bus correspondingly; 5#-8# thyristor rectifying units are connected with the 1# positive bus and the negative bus in parallel; the outputs of the 5# thyristor rectifying unit are connected with the 1# positive bus, the 2# positive bus and the negative bus correspondingly; the 4# thyristor rectifying unit and the 5# thyristor rectifier unit are connectedwith a current and voltage detection circuit; and two sets of parallel power supply flow stabilization systems of a four rectification units combined mode carry out large-closed-loop control separately.

Description

technical field [0001] The invention relates to a control system for redundant switching of a thyristor rectifier device under compensation operation in an aluminum electrolytic cell, in particular to a compensation structure in an electrolytic cell in the aluminum electrolysis industry, specifically to redundant switching of a thyristor rectifier device under compensation operation in an electrolytic cell in the aluminum electrolysis industry Control System. Background technique [0002] With the increase of the working current of modern large-scale aluminum electrolytic cell, the influence of the magnetic field generated by its current-carrying busbar and melt current on its production and stable operation becomes more and more prominent. The electromagnetic force generated by the interaction between the magnetic field and the melt current accelerates the circulation of the melt in the tank, causing the aluminum liquid level to rise, deflect and fluctuate, and may even cau...

AI Technical Summary

Problems solved by technology

The electromagnetic force generated by the interaction between the magnetic field and the melt current accelerates the circulation of the melt in the tank, causing the aluminum liquid level to rise, deflect and fluctuate, and may even cause the aluminum electrolytic cell to fail to produce normally

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