Electrolysis direct current system online insulated monitoring device and a monitoring method

Abstract

The invention relates to an electrolysis direct current online insulated monitoring device and a monitoring method. The device comprises a first voltage transducer and a second voltage transducer which are connected in series at two ends of a high electrolysis direct current bus voltage, a fifth voltage transducer parallelly connected with the first voltage transducer and the second voltage transducer which are connected in series, and electrolytic cells arranged at the two ends of the high electrolysis direct current bus voltage. The device is characterized in that: a third voltage transducer and a fourth voltage transducer, which are connected in series, are arranged at the two ends of the high electrolysis direct current bus voltage; a fuse is arranged between each of the first and second voltage transducers and the neutral point of a high electrolysis direct current bus; the third voltage transducer and the fourth transducer are grounded; the output put ends of the first voltage transducer, the second voltage transducer, the third voltage transducer, the fourth voltage transducer and the fifth voltage transducer are connected with a PLC input and output module; and the PLC input and output module is connected with a display screen.

Description

technical field [0001] The invention relates to an on-line insulation monitoring device, in particular to an on-line insulation monitoring device and a monitoring method for an electrolytic DC system. Background technique [0002] The aluminum electrolysis system is composed of hundreds of electrolytic cells connected in series through the DC bus, and is installed in the nearly two-kilometer-long electrolytic plant. The electrolytic cells and the interconnected DC buses are all installed on their respective insulators. It is only relying on personnel to stand on the operating plane with insulating properties to ensure the safety of production and operation. The design and management does not allow the ground zero potential to be introduced into the 4M range of the inverted electrolyzer and the operating plane. When the ground insulation is reduced or even broken down to the ground, the construction will cause serious consequences. If the electrolytic cell body leaks or colla...

AI Technical Summary

Problems solved by technology

The problem with this principle of wiring is that real-time online monitoring of the insulation of the DC bus to the ground cannot be realized. When the insulation of the neutral point of the electrolytic cell is reduced, the device cannot detect the problem in time.

Problems and defects of the electrolytic DC series insulation monitoring system: inspectors are required to check whether there are problems in the system through the button on a regular basis, and it is impossible to monitor the insulation of the DC busbar to the ground at all times online

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