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DC-DC converter system and control method thereof

A DC conversion and controller technology, applied in the direction of DC power input conversion to DC power output, control/regulation systems, AC power input conversion to DC power output, etc. problems such as power and operating efficiency, to achieve the effect of simple operation

Active Publication Date: 2018-03-09
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inductor 304 is used to filter out the harmonic commutation component in the output voltage and output current, but when it is applied to the field of high-voltage and large-capacity DC transmission, it needs to use an inductor with a large inductance value, which will limit the voltage-dividing DC-MMC converter Topology transfer power and operating efficiency

Method used

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  • DC-DC converter system and control method thereof
  • DC-DC converter system and control method thereof
  • DC-DC converter system and control method thereof

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] A DC-DC conversion system provided by an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0049] The DC-DC conversion system in this embodiment includes a phase unit and a controller. in,

[0050] The phase unit includes multiple bridge arms connected in star s...

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Abstract

The invention provided a DC-DC converter system and a control method thereof. The system comprises a phase unit and a controller, wherein the phase unit comprises multiple bridge arms, the multiple bridge arms are in star connection, a common end and multiple output terminals are formed, and each bridge arm comprises a variable voltage source; and the controller is respectively connected to each variable voltage source for controlling voltage of each variable voltage source. In comparison with the prior art, according to the DC-DC converter system and the control method thereof provided in theinvention, as the bridge arms in the phase unit are in star connection, commutating current for energy balance is only cycled inside the system but does not flow to the DC system; and the system adopts few power electronic devices and filters and can be applied to a high-voltage large-capacity DC transmission field, and limitations on DC power transmission of the DC-DC converter system by inductance elements can be reduced.

Description

technical field [0001] The invention relates to the technical field of power electronic conversion, in particular to a DC-DC conversion system and a control method thereof. Background technique [0002] With the development of power electronic devices, the DC-DC conversion system based on power electronics technology has been more and more widely used. At present, the DC-DC conversion system mainly includes the indirect conversion type DC / AC / DC DC conversion system and the direct conversion type DC / DC DC conversion system. in, [0003] 1. Indirect conversion DC / AC / DC DC conversion system [0004] The DC conversion system includes an AC link, and its typical topology is figure 1 The transformer-based isolated DC / DC converter topology shown consists of sequentially connected converter inputs U DC1 , VSC converter 101, intermediate frequency transformer 103, VSC converter 102 and converter output terminal U DC2 . The converter input U DC1 The DC voltage on one side is co...

Claims

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Application Information

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IPC IPC(8): H02M3/155H02M3/335
CPCH02M3/155H02M3/335H02M1/14H02M3/158H02M7/4835H02M7/4837H02M1/0095
Inventor 王新颖汤广福贺之渊魏晓光庞辉张升王成昊高阳客金坤杨兵建周万迪丁骁
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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