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Software current-sharing control method of rectifier module

A rectifier module and current control technology, which is applied in the direction of converting irreversible AC power input into DC power output, etc., can solve the problems of slow current sharing speed and large fluctuation, so as to speed up current sharing speed, improve reliability and stability Effect

Inactive Publication Date: 2015-03-25
DELTA GREENTECH CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a rectification module software current sharing control method, which is used to solve the problem that the adjustment of the step size cannot be adjusted in real time in the prior art, and the current sharing speed is slow or fluctuating. To improve the reliability and stability of the communication power supply expansion system

Method used

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  • Software current-sharing control method of rectifier module
  • Software current-sharing control method of rectifier module
  • Software current-sharing control method of rectifier module

Examples

Experimental program
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Embodiment 1

[0031] see figure 2 , in the step of data pre-processing, first execute step S100. In this embodiment, set according to the characteristics of the rectifier module: rated output current RSI=20A, rated output voltage=270Vdc, current sharing adjustment constant Kp=20mV / A, current sharing adjustment coefficient step size Kp_Step=1mV / A, current sharing voltage Adjust the minimum step size mVstep=4mV, the upper limit of the current sharing compensation voltage=2V, the lower limit of the current sharing compensation voltage=-2V, the current sharing unbalance threshold=2A, the oscillation threshold=1A, the load current change threshold and the average Flow adjustment coefficient upper / lower limit value.

[0032] Next, proceed to step S101.

[0033] In this embodiment, in step S101, the number of extended rectifier modules in the current system rectifier module group N=20 is obtained, the total output current LI(t)=200A, and the average output current AveSMRI(t)=10A.

[0034] Next...

Embodiment 2

[0109] An alarm can be selected when the current sharing of the rectifier module i is abnormal, please refer to image 3 , which is displayed as a control flow chart of abnormal current sharing alarm.

[0110] In the control process of abnormal current sharing alarm, step S100' is first performed to monitor the current sharing compensation voltage and output current of the rectifier module i in the current state.

[0111] In this embodiment, the current system outputs a total current LI(t)=200A, and an average output current AveSMRI(t)=10A. Next, proceed to step S101'.

[0112] In step S101', it is determined whether the rectification module i has an abnormal current sharing alarm, if yes, proceed to step S102'; if not, proceed to step S103'.

[0113] When the rectification module i generates a current sharing abnormality alarm, proceed to step S102'.

[0114] In step S102', it is judged whether the absolute value of the difference between the current average output current...

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Abstract

The invention provides a software current-sharing control method of a rectifier module, which is applied to a communication power supply system and aims at solving the problems that the current-sharing voltage adjusting step length cannot be adjusted in real time, the current-sharing speed is slow, the fluctuation is great and the like commonly in communication power supply current sharing. The software current-sharing control method disclosed by the invention comprises the steps of preprocessing data, adjusting a current-sharing adjusting coefficient, calculating a the current-sharing voltage adjusting step length, calculating a target current-sharing compensation voltage at the time and controlling a current-sharing abnormal alarm of the rectifier module. The current-sharing speed and the fluctuation degree are controlled by adjusting the current-sharing adjusting coefficient; a current-sharing control speed is accelerated and the current-sharing smoothness is improved; and the best current-sharing compensation voltage is provided for a communication system so that the reliability and the stability of a whole power supply expansion system are improved.

Description

technical field [0001] The invention relates to a software current sharing control method for a rectification module, in particular to a software current sharing control method for a communication system rectification module. Background technique [0002] The communication power supply system is the heart of the communication system. A stable and reliable communication power supply system is the key to ensure the safe and reliable operation of the communication system. The communication circuit is interrupted and the communication system is paralyzed, resulting in great economic and social benefit losses. Therefore, the communication power supply system occupies a very important position in the communication system. [0003] In the communication power supply system, due to the limited capacity of the rectifier module, in practical applications, multi-module parallel operation is often used to expand the communication power supply system to expand the output current and outp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/02
Inventor 王欢
Owner DELTA GREENTECH CHINA CO LTD
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