Rectifying control system with redundant current feedback

A current feedback and control system technology, applied in the direction of converting AC power input into DC power output, irreversible AC power input into DC power output, electrical components, etc., can solve unit output fluctuations, difficult to improve safety, interference, etc. problems, to achieve the effect of optimizing system security, improving control response speed and overall accuracy, and avoiding abnormal changes in output current

Active Publication Date: 2017-05-31
JIUJIANG SUN KING TECH CO LTD
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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.

Method used

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  • Rectifying control system with redundant current feedback
  • Rectifying control system with redundant current feedback
  • Rectifying control system with redundant current feedback

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Embodiment Construction

[0027] In order to make the description of the technical method of the present invention clearer, further elaboration will be made below in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only used to illustrate the solution, and do not fully represent the entire content of the present invention, nor represent all situations of actual application.

[0028] Such as figure 1 As shown, the large-scale rectification system is divided into several 12-pulse rectifier units based on the number of rectifier transformers, and the unit is divided into two 6-pulse devices, star and corner. The current signals used by the control system as feedback are marked separately in the figure. These relationships exist between the current signals in the system:

[0029] ·There is a linear relationship between the AC current conversion signal of the star-side rectifier device and the DC current measurement signal, but with a small amount of error....

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12H02M7/155
CPCH02M7/12H02M7/1557
Inventor 曾广俊何德郑伟伟罗明阳赵剑锋赵李诚
Owner JIUJIANG SUN KING TECH CO LTD
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