Rectifying control system with redundant current feedback

Abstract

The invention discloses a rectifying control system with redundant current feedback, and the rectifying control system is applied to large rectification systems. The rectifying control system comprises an alternating-current transformer, a direct-current sensor, a main controller, a rectifier unit driving controller and an alarm device, the rectifier unit driving controller comprises a rectifier unit angle side drive controller and a rectifier unit star side drive controller, and the main controller comprises a logic control module, an adjuster and an output control module. The rectifying control system is applied to large same parallelly-connected rectification systems, output current fluctuation caused by feedback signal anomalies is effectively avoided without increasing the number of the sensor, a rectifying device and a load are protected under abnormal working conditions, system safety is improved, basic control tasks can be finished by the aid of fewer sensors, operating cost is reduced, and stable running reliability of the device is improved.

Description

technical field [0001] The present invention relates to large-scale rectification systems, and more particularly, to a rectification control system with redundant current feedback. Background technique [0002] In order to realize the large DC output required by industrial production, many sites need to use multiple rectifiers in parallel. These devices usually use three-phase six-pulse as the basic unit and work in a steady flow mode. Two six-pulse units share one rectifier transformer, and the star and angle sides are connected to form a 12-pulse unit to reduce harmonic interference. [0003] In order to enable these devices to evenly bear the output required by the load, the on-site control system needs multiple sets of high-current DC sensors to detect separately. These sensors often work in harsh environments, and it is difficult to improve safety. At the same time, the on-site connection line is usually tens of meters or even hundreds of meters long, which is very e...

AI Technical Summary

Problems solved by technology

These sensors often work in harsh environments, and it is difficult to improve safety

At the same time, the on-site connection lines are usually tens of meters or even hundreds of meters long, which is very easy to introduce various interference factors and safety problems

Once the sensor signal is abnormal, it will cause the output of the unit to fluctuate, which will affect production in the slightest, and easily lead to production safety accidents in severe cases.

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