Digital parallel current sharing method and system for DC converters

A DC converter and flow system technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve the problems of current equalization system oscillation, difficulty in stabilization, and inability to ensure convergence, etc., to achieve reduction Power frequency circulation, the effect of increasing reliability

Active Publication Date: 2016-12-21
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the problem that convergence cannot be guaranteed in the existing current sharing operation process, and it is easy to cause the current sharing system to oscillate and be difficult to stabilize, the purpose of the present invention is to provide a DC converter digital parallel current sharing method and system

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  • Digital parallel current sharing method and system for DC converters
  • Digital parallel current sharing method and system for DC converters
  • Digital parallel current sharing method and system for DC converters

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Embodiment Construction

[0033] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention .

[0034] The present invention proposes a digital current sharing method with a host. The working principle of this master-slave current sharing method is: the host sends out a current sharing reference, and the slave receives the current sharing reference and passes through the digital current according to the given current. The adjustment algorithm adjusts the output current to achieve the purpose of current sharing.

[0035] For example, a digital parallel current sharing method for DC converters provided in an embodiment of the present invention includes the following specific steps:

[0036] S300. The host periodically collects the current load ...

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Abstract

The invention discloses a DC converter digital parallel current equalizing method and system. The method comprises that: a host periodically acquires present load current and calculates a present current equalizing set value and issues the value in combination with last time current equalizing set values issued to multiple parallel-connected slaves last time; and whether load current adjustment of each slave is executed is judged by each slave according to the acquired present current equalizing set value and the stored current equalizing set value last time, and when a difference value between the present current equalizing set value and the current equalizing set value last time is greater than or equal to the preset minimum current equalizing error threshold value, the load current adjustment of the slaves is executed according to the present current equalizing set value, wherein the minimum current equalizing error threshold value can be set as zero. With application of the method, the DC converter digital parallel current equalizing system can still operate stably even interference appears or loads are switched so that great robustness is realized.

Description

technical field [0001] The invention relates to the field of communication power supplies, in particular to a digital parallel current sharing method and system for DC converters. Background technique [0002] In the field of communication power supply technology, it is a very important technology to realize high power output by connecting multiple power supply modules in parallel. [0003] Parallel power supply has many advantages such as centralized management of power supply, easy expansion, good compatibility, redundant backup, high reliability, and high cost performance, and because of its advantages, it radiates and promotes the parallel connection technology of power supply modules in the entire power supply field. research, progress and development. [0004] Power supply parallel technology has become the core technology of high-power distributed power system, and the core of power supply parallel operation is current sharing technology. The so-called current shari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00
Inventor 鲍胜华刘秀邱旭强王陶
Owner ZTE CORP
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