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Auto-interference current-sharing control method

A flow control, self-disturbing technology, used in control/regulation systems, conversion of DC power input to DC power output, instruments, etc., can solve the problem of uneven current distribution, improve safety and reliability, easy to operate, The effect of good versatility and ease of operation

Active Publication Date: 2019-08-23
南京桐润新能源有限公司
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Problems solved by technology

[0004] In order to solve the problem of uneven current distribution when DC power supplies are connected in parallel, the present invention provides an independent disturbance digital high-precision current sharing algorithm for N+X parallel operation of DC power supplies, which can make full use of the effective capacity of each power supply and improve the safety of operation at the same time performance and reliability, reasonably distribute the load current borne by each power supply

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Embodiment Construction

[0016] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1-3 As shown, a self-disturbance current sharing control method is used to realize the current sharing control of the parallel power supply system. The whole parallel power supply system forms a closed loop, including the current given control module and n power supply modules. The given current is I ref , the total output current is I out , I ref with I out equal in magnitude, the output current of a single power supply is I 1 , I 2 ...I n , I 1 , I 2 ...I n Equal in size, equal to I out / n; the current output I of each power module at the beginning 11 , I 21 ...I n1 are equal to zero, at this time the total current I out1 equal to zero, I ref and I out1 The difference is greater than the threshold k 2 , the power given module outputs a quantitative △I, the magnitude of which is k.

[0018] A single power ...

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Abstract

The invention discloses an auto-interference current-sharing control method. A whole parallel power supply system forms a closed loop and comprises a current given control module and n power supply modules, the given current is Iref, the total output current is Iout which is equal to the Iout, the output currents of a single power supply are I1, I2, ..., In which are the same and are equal to Iout / n; when the power supplies are started, the output currents of each power supply module I11, I21, ...,In1 are equal to 0, at this time, the total current Iout1 is equal to 0, the difference of the Iref and the Iout1 is larger than a threshold value k2, and a power supply given module outputs a constant value [Delta]I which is equal to k. The problem of uneven current distribution when the directcurrent power supplies are connected in parallel is solved, the effective capacity of each power supply can be fully utilized, the safety and the reliability of operation are simultaneously improved,and the load current borne by each power supply is reasonably distributed.

Description

technical field [0001] The present invention relates to the technical field of power electronics, and more specifically, relates to an independent disturbance digital high-precision current sharing algorithm for N+X parallel operation of DC power supplies. Background technique [0002] With the development of science and technology, the demand for high-power, high-power-density, and high-reliability power supply systems continues to increase. If a single power supply is used for power supply, due to the relatively large power to be processed, it will bring difficulties in the selection of power devices, the improvement of switching frequency and power density. In addition, once the power fails, it will lead to the collapse of the entire system. Therefore, using multiple power modules to operate in parallel to output high power is an important direction for the development of power supply technology. In a parallel system, each converter only handles a small power. Since eac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M1/00
CPCH02M1/00H02M3/00H02M1/0003
Inventor 陈歌于金铃裴中才
Owner 南京桐润新能源有限公司
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