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a converter

A converter and a combination technology, which is applied in the field of converters, can solve the problems of incapable converter station output current control, etc., and achieve the effect of increasing the transmission capacity

Active Publication Date: 2019-07-26
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

[0005] The embodiment of the present invention provides a converter to solve the problem that the modular multilevel converter based on the capacitive sub-module structure in the prior art needs to first control the output voltage of the converter station to further control the output current, and cannot The problem of directly controlling the output current of the converter station

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Embodiment 1

[0029] In this embodiment, a converter is provided, figure 1 is a circuit diagram of a converter according to an embodiment of the present invention; as figure 1 As shown, it includes: three bridge arm circuits, wherein each bridge arm circuit is connected in parallel, each bridge arm circuit includes an upper bridge arm circuit and a lower bridge arm circuit connected in series, and each bridge arm circuit One end of the upper arm circuit of the circuit is connected to the positive DC bus, one end of the lower arm circuit of each arm circuit is connected to the negative DC bus, and the connection point of the upper arm circuit and the lower arm circuit of each arm circuit as the output of the converter.

[0030] figure 2 It is a schematic diagram of an upper bridge arm circuit or a lower bridge arm circuit according to an embodiment of the present invention, such as figure 2 As shown, at least one of the upper bridge arm circuit and the lower bridge arm circuit includes ...

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Abstract

The present invention provides a converter comprising: three bridge arm circuits, wherein each bridge arm circuit is connected in parallel two by two, and each bridge arm circuit includes an upper bridge arm circuit and a lower bridge arm circuit connected in series , and one end of the upper bridge arm circuit of each bridge arm circuit is connected to the positive DC bus, one end of the lower bridge arm circuit of each bridge arm circuit is connected to the negative DC bus bar, and the upper bridge arm circuit of each bridge arm circuit is connected to the lower The connection point of the bridge arm circuit is used as the output end of the converter, at least one of the upper bridge arm circuit and the lower bridge arm circuit includes at least one identical subunit connected in parallel, and each subunit includes an inductor and two groups of bidirectional switches. The present invention solves the problem that the modular multilevel converter based on the capacitor sub-module structure in the prior art needs to control the output voltage of the converter station first to further control the output current, and cannot directly control the output current of the converter station The problem.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a converter. Background technique [0002] With the shortage of traditional energy and the aggravation of environmental degradation, countries around the world have realized that the use and development of energy must transition from traditional energy to green renewable energy and other clean energy. In recent years, new energy technologies such as wind energy and solar energy have developed rapidly, but due to their intermittent and unstable characteristics, traditional technologies for accepting ultra-large-scale new energy are subject to more and more restrictions, and new technologies must be adopted , equipment and grid structure to meet the profound changes in the future energy pattern. The multi-terminal DC transmission system and DC grid technology based on conventional DC and flexible DC are one of the effective technical means to solve this problem. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483
CPCH02M7/483H02M7/4835
Inventor 于弘洋彭傊祁欢欢
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD