Reverse current protection rectifier unit

Abstract

The present invention discloses a reverse current protection rectifier unit. A DC output positive bus bar or negative bus bar of each single unit is connected with a single unit reverse current detection box. The reverse current protection rectifier unit also includes a main reverse current protection box. The main reverse current protection box is connected with a circuit breaker protection circuit of the single unit and the reverse current detection box of the single unit. The reverse current detection box of the single unit includes a reverse current mutual inductor. The reverse current mutual inductor acquires DC bus bar signals. The reverse current mutual inductor transmits short-circuit fault signals to the reverse current detection box of the single unit when the short-circuit faults of the DC bus bar in a rectifier cabinet of the single unit occur, the reverse current detection box of the single unit transmits action signals to the main reverse current protection box, and the main reverse protection box transmits a plurality of action contacts to the circuit breaker protection circuit of each single unit so that a unit feeder line circuit trips out. The reverse current protection rectifier unit is advantageous in that the reverse current protection configuration of the rectifier unit is provided at the DC side, and the human body and equipment safety can be ensured because the rectifier unit is turned off timely when the short-circuit faults of the DC bus bar in the rectifier unit occurs.

Description

technical field [0001] The invention relates to a rectifier unit for reverse current protection, which is suitable for reverse current protection of multiple rectifier units in an electrolytic aluminum plant. Background technique [0002] In the design of electrolytic aluminum plants in recent years, most of the power supply system is configured with 6 to 8 rectifier units to supply power for the whole series of DC busbars; a rectifier unit is composed of a power distribution system, rectifier transformer, rectifier cabinet, and DC busbar . The working principle of the above-mentioned equipment is to convert AC power into DC power through the rectifier transformer and rectifier cabinet to supply power to the DC bus. If the short-circuit fault of the DC bus of the rectifier unit is not removed in time, it will endanger personal safety and equipment damage will cause heavy losses. Contents of the invention [0003] In order to solve the above-mentioned technical problem of ...

AI Technical Summary

Problems solved by technology

The working principle of the above-mentioned equipment is to convert AC power into DC power through the rectifier transformer and rectifier cabinet to supply power to the DC bus. If the short-circuit fault of the DC bus of the rectifier unit is not removed in time, it will endanger personal safety and equipment damage will cause heavy losses.

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