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A Distributed DC Battery Power Supply System

A power supply system, distributed technology, applied in battery circuit devices, parallel operation of DC power supplies, load balancing in DC networks, etc., can solve problems such as complex structure and passive discharge current regulation

Active Publication Date: 2020-06-12
XIANGJIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides a distributed DC power supply system, which solves the problems of unified monitoring and control, complex structure, and passive regulation of discharge current

Method used

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  • A Distributed DC Battery Power Supply System
  • A Distributed DC Battery Power Supply System
  • A Distributed DC Battery Power Supply System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as figure 1 As shown, the distributed DC system of the present invention is composed of multiple DC battery power supply systems, numbered as 1, 2, ..., n, wherein, n is the total number of DC power supply systems, and multiple DC power supply systems Commonly connected on a power supply bus 1, each of the DC power supply systems includes battery arrays, and the battery arrays of each DC power supply system have corresponding battery capacities, and these battery capacities are not necessarily the same, which can be expressed as σ[ 1],σ[2],...,σ[n], ​​the battery capacity of the battery array σ[1],σ[2],...,σ[n] and the output current through The automatic load balance control method realizes automatic balance, so that each DC power supply system achieves automatic balance of discharge.

[0047]The voltage level of the battery array 2 has no necessary regulations. Preferably, 48V is selected. The voltage level is determined by the number of batteries connected in s...

Embodiment 2

[0094] An example is used to illustrate the effect of the present invention, where the no-load output voltage V of the DC battery power supply system is 0 =48V, bus load current I=100A, a total of 5 distributed battery power supply systems are online, and the corresponding discharge currents are I[1], I[2], I[3], I[4] and I[5], corresponding to The initial capacity is expressed as a percentage of the nominal capacity, respectively σ[1]=100%, σ[2]=90%, σ[3]=80%, σ[4]=70%, σ[5]= 60%, the battery nominal capacity is 10AH, K=0.05, the real-time discharge current status simulation of 5 battery-powered devices controlled according to the control algorithm, such as Figure 5 As shown, wherein: the horizontal axis is the time axis, the sampling period is 20 seconds, the discharge time is 940 seconds (15.7 minutes), and the vertical axis is the discharge current, the unit is A.

[0095] From Figure 5It can be seen that since the initial capacity of each battery-powered device is dif...

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Abstract

The invention discloses a distributed direct-current battery power supply system. The distributed direct-current battery power supply system comprises a plurality of direct-current power supply systems which are numbered as 1,2,... and n, wherein n is the sum of the direct-current power supply systems; the plurality of direct-current power supply systems are jointly connected on a power supply busbar; each direct-current power supply system comprises a battery array with corresponding battery capacity, automatic balance between the battery capacity of the battery array and output current is realized with an automatic load balance control method, so that the direct-current power supply system realizes automatic balance of discharge. By adopting the battery capacity parameter for automatically adjusting equivalent resistance of the system, adaptive discharge current regulation and autonomic regulation of the direct-current power supply systems are realized, and the online direct-currentpower supply systems finish discharge simultaneously without need of unified monitoring, unified control and networking.

Description

technical field [0001] The invention relates to a power supply system, in particular to a distributed direct current power supply system. Background technique [0002] Distributed DC power supply system, as a power supply method for data center, is more and more widely used. Its main feature is that the battery power supply device is deployed in a distributed manner on the DC bus, which can be increased or decreased at will according to the load size and backup requirements; the load capacity of a single module is low, and the load capacity of the bus is the sum of the load capacity of a single module; as a distributed DC power supply An important requirement of the power supply device is load balancing: that is, to realize the balanced discharge of each module according to the load of the bus bus, so as to ensure the timeliness of power supply while maintaining the overall load capacity of the bus and avoid the "barrel effect", that is, Due to the early discharge of indivi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/34H02J1/14H02J1/10
CPCH02J1/10H02J1/14H02J7/34
Inventor 韩旭刘敬伟朱国富崔兵
Owner XIANGJIANG TECH