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Double-switched-capacitor tandem type direct-current transformer topological structure and inrush current suppression method

A technology in which a DC transformer and a capacitor are connected in series, applied in the field of transformers, can solve the problem of not being able to take into account high efficiency and low cost at the same time, and achieve the effect of having fault self-clearing ability, high efficiency, low efficiency, and high work efficiency.

Pending Publication Date: 2021-12-21
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0004] The purpose of this application is to provide a dual-switch capacitor series DC transformer topology and inrush current suppression method, which is used to solve the problem that the prior art cannot balance high efficiency and low cost on the basis of fault self-clearing ability and inrush current suppression ability technical issues

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  • Double-switched-capacitor tandem type direct-current transformer topological structure and inrush current suppression method
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  • Double-switched-capacitor tandem type direct-current transformer topological structure and inrush current suppression method

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[0029] The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a sp...

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Abstract

The invention discloses a double-switched-capacitor tandem type direct-current transformer topological structure and an inrush current suppression method. The structure comprises n double-switch capacitor series modules and n DAB modules, wherein n is a positive integer; the double-switch capacitor series modules are connected in series with high-voltage sides of the DAB modules to form first units; each double-switch capacitor series module comprises a first IGBT switch, a second IGBT switch and a first capacitor; an emitter of each first IGBT switch is connected with a first end of the corresponding first capacitor, and a collector of each second IGBT switch is connected with a second end of the corresponding first capacitor; and the high-voltage sides of the first units are sequentially connected in series, and low-voltage sides of the first units are connected in parallel. The technical problem that high efficiency and low cost cannot be considered at the same time on the basis of fault self-cleaning capability and inrush current suppression capability in the prior art is solved.

Description

technical field [0001] The present application relates to the technical field of transformers, in particular to a dual-switch capacitor series DC transformer topology and an inrush current suppression method. Background technique [0002] With the increasing DC loads such as electric vehicle charging and swapping stations and large data centers, as well as the high proportion of DC-type renewable energy generation equipment such as photovoltaics and wind turbines connected, the current source-load-storage DC characteristics of the distribution network are becoming more and more obvious. Compared with the AC distribution network, the multi-terminal interconnection flexible DC power distribution mode has the characteristics of high energy transmission efficiency, small line loss, large-scale consumption of distributed power supply and access to energy storage equipment, and simpler and more flexible coordinated control of the entire network. Therefore, the DC distribution netw...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M3/07H02M1/32
CPCH02M3/3353H02M3/07H02M1/32
Inventor 刘尧阮绵晖唐捷陈建福曹安瑛丘冠新杨锐雄陈勇裴星宇李建标吴宏远
Owner GUANGDONG POWER GRID CO LTD
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