Device, system and process for detecting and positioning aluminum electrolysis cell ground faults

Abstract

The invention provides a device, a system and a process for detecting and positioning aluminum electrolysis cell ground faults. The device comprises a first wire, n second wires, n bridge arm impedors, (n-1) third wires, (n-1) current sensors and a voltage source, one end of each bridge arm impedor is connected with a DC bus through the first wire, each second wire correspondingly connects the other end of one bridge arm impedor with a grounding point of an electrolytic cell, and each third wire respectively connects the other ends of the two bridge arm impedors corresponding to the two adjacent electrolytic cells and is correspondingly provided with a current sensor. Therefore, the real-time current amplitude and the phase data of each third wire can be detected, and a fault of one or more electrolytic cells can be accurately detected and positioned. According to the invention, a single-point fault and a multi-point grounding fault of the aluminum electrolysis cell can be timely and accurately detected and positioned; and the current efficiency is improved, the energy utilization rate is improved and the cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of fault detection technology for electrolytic cells of aluminum electrolysis enterprises, specifically, to a device capable of detecting and locating grounding faults of aluminum electrolytic cells in real time, as well as its system and process, so as to improve current efficiency and energy utilization rate and reduce costs. Background technique [0002] At present, the serious excess capacity of aluminum electrolysis has directly caused the imbalance between production and demand, and the price has fallen, which has led to a significant deterioration in the profitability of domestic electrolytic aluminum enterprises. As an industry with a short construction period, low barriers to entry, and high exit barriers, the dilemma of China's aluminum electrolysis overcapacity will not be alleviated in the near future. Current efficiency is one of the fastest shortcuts. The main reasons for the reductio...

AI Technical Summary

Problems solved by technology

When the signal injection detection method is used, it can quickly detect the ground fault of the electrolytic cell, but it cannot accurately locate the fault

And when the aluminum electrolytic cell is grounded, a large transient current will be generated, which will have a certain impact on the detection. The above two detection methods lack effective safety measures and have great potential safety hazards.

In addition, when the electrolytic cell is grounded, there may be more than one grounding point, and the above two methods cannot accurately determine the positions of multiple grounding points

[0005] In summary, the current domestic system for detecting the grounding status of aluminum electrolytic cells still has the following main problems: the specific fault location of the aluminum electrolytic cell cannot be accurately judged, and the aluminum electrolytic cell cannot be judged at the same time when multiple points are grounded. Multiple fault locations for

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