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Direct-current power parallel system and method for controlling same

A technology of DC power supply and voltage controller, which is applied in the direction of parallel operation of DC power supplies, and can solve problems such as affecting power usage efficiency, increasing power loss, and poor quality

Active Publication Date: 2014-08-06
GOOD WILL INSTR
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

However, this approach will inevitably increase power loss and affect power efficiency
[0006] It can be seen from the above that although the existing voltage drop method is helpful for the parallel power supply system to achieve the purpose of current sharing, the voltage drop is generated by increasing the impedance, which will cause losses and poor voltage adjustment capabilities. Therefore, further review is needed to seek a feasible solution. solution

Method used

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  • Direct-current power parallel system and method for controlling same
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  • Direct-current power parallel system and method for controlling same

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Embodiment Construction

[0027] In the following, the technical means adopted by the present invention to achieve the intended purpose of the invention will be further described in conjunction with the accompanying drawings and preferred embodiments of the present invention.

[0028] About the first preferred embodiment of the parallel system of the present invention, please refer to figure 1 As shown, it includes a plurality of DC power supply modules 10A, 10B~10n, and each DC power supply module 10A, 10B~10n has a power input terminal and a power output terminal respectively, and the power input terminals are connected to each other to jointly connect the input power supply. The power output terminals of the DC power supply modules 10A, 10B˜10n are also connected to each other so as to be commonly connected to the load to form a parallel system.

[0029] Regarding the specific structure of each DC power module 10A, 10B~10n, the following will take one of the DC power module 10A as an example, and t...

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Abstract

The invention relates to a direct-current power parallel system and a method for controlling the same. The direct-current power parallel system and the method have the main advantages that output ends of a plurality of direct-current power modules are connected with loads in parallel, each direct-current power module is provided with a virtual voltage drop computing unit, and feedback signals of the output ends are adjusted, so that increase of output impedance can be simulated, and the current-sharing parallel purpose can be achieved by the various direct-current power modules by the aid of a virtual voltage drop process; a voltage regulating unit is further arranged in more than one direct-current power module, so that voltages outputted to the loads can be corrected according to fed outputted voltages, and the voltage regulating ability of the parallel system can be improved.

Description

technical field [0001] The present invention relates to a DC power parallel system and a control method thereof, in particular to a power parallel system that combines a virtual voltage drop method and a master-slave architecture to take into account both current sharing and voltage adjustment capabilities. Background technique [0002] In order to ensure the stability and reliability of the power supply of the power system, most of the existing power systems are modularized power supplies, and the power modules with specific specification series are connected to each other in series or in parallel. When multiple power modules are connected in parallel, it still cannot fully ensure the stable and reliable operation of the entire power system. The premise of its stable operation lies in voltage and current sharing. In terms of current sharing, its main tasks include: The output voltage of the power module varies the same. And the output current of each power supply module is...

Claims

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Application Information

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IPC IPC(8): H02J1/10
Inventor 廖思远
Owner GOOD WILL INSTR
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