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System for connecting hydrogen fuel cell into medium-voltage direct-current power distribution network

A DC power distribution network and fuel cell technology, which is applied in parallel operation of DC power supplies, DC network circuit devices, electrical components, etc., can solve the problems of low output voltage of PEMFC, lower fuel cell efficiency, etc., and achieve good results.

Inactive Publication Date: 2021-02-19
XIDIAN POWER RECTIFIER XIAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Hydrogen fuel cell is a kind of PEMFC. Due to the low output voltage of PEMFC, the efficiency of the fuel cell will be reduced if a large number of battery modules are connected in series. method
[0005] However, there is currently a lack of an effective solution for hydrogen fuel cells to be connected to the DC distribution network.

Method used

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  • System for connecting hydrogen fuel cell into medium-voltage direct-current power distribution network
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  • System for connecting hydrogen fuel cell into medium-voltage direct-current power distribution network

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Embodiment Construction

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0018] In the description of this specification, the words "comprising", "comprising", "having", "containing" and so on are all open terms, meaning including but not limited to. A description referring to the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one of the present application. Examples or examples. In this specification, schematic representations of the above terms do not ne...

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Abstract

The invention provides a system for connecting a hydrogen fuel cell into a medium-voltage direct-current power distribution network. The system comprises a hydrogen fuel cell PEMFC equivalent model, aDC / DC equivalent model connected with the PEMFC equivalent model and a low-voltage direct-current LVDC system respectively, and a solid-state transformer SST model connected with the LVDC system anda medium-voltage direct-current MVDC system respectively, wherein the DC / DC equivalent model comprises a plurality of interleaved current feed full-bridge ICFFB converters which are connected in parallel, and the SST model comprises a plurality of cascaded dual-active full-bridge DAB modules. The hydrogen fuel cell can be connected into the medium-voltage direct-current power distribution network,the structure is simple, and the efficiency is high.

Description

technical field [0001] The invention relates to the field of active distribution networks, in particular to a system for connecting hydrogen fuel cells to a medium-voltage direct current distribution network. Background technique [0002] In recent years, as more and more distributed power sources and loads are connected to the power grid, and these power sources and devices show a more obvious trend on the user side. In particular, the urgent need for renewable energy to be connected to the grid has made the grid structure more complex, and users have higher requirements for power quality, power supply reliability, energy conservation, environmental protection, and economic security. Compared with the AC distribution network, the construction of the DC distribution network on the user side has better economy and applicability. [0003] Since distributed power sources such as photovoltaics and wind power have random and intermittent problems, a well-configured power generat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10
CPCH02J1/102
Inventor 翟党国王文萃程晓绚任军辉张树楠
Owner XIDIAN POWER RECTIFIER XIAN
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