10kV medium-voltage direct-hanging type direct-current microgrid system

A DC micro-grid and direct-mounted technology, which is applied to AC network circuits, AC network load balancing, and AC networks to reduce harmonics/ripples, etc., can solve high maintenance costs, complex construction, and large standby and no-load losses To achieve the effect of shortening the capital recovery time, increasing the return on investment, and reducing the volume of the whole machine

Inactive Publication Date: 2020-08-28
QINGDAO TOPSCOMM COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there are disadvantages such as large standby and no-load loss, large amount of non-ferrous metals, environmental pollution, high and low voltage fault isolation, complex construction, poor power quality, and high maintenance costs.

Method used

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  • 10kV medium-voltage direct-hanging type direct-current microgrid system
  • 10kV medium-voltage direct-hanging type direct-current microgrid system
  • 10kV medium-voltage direct-hanging type direct-current microgrid system

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Embodiment Construction

[0014] Hereinafter, specific embodiments of the present invention will be further described in conjunction with the accompanying drawings.

[0015] The invention provides a 10kV medium-voltage direct-connection DC microgrid system, which can be used in the field of 10kV medium-voltage direct-connection DC microgrid design, and has the advantages of low harmonic content, isolation of high and low voltage faults, easy maintenance, and two-way transmission of energy.

[0016] The topological structure diagram of the 10kV medium-voltage direct-connected DC microgrid applied in the present invention is as follows figure 1 As shown, its appearance structure diagram is as follows figure 2 As shown, the scheme design diagram is shown in image 3 as shown, image 3 The scheme described in is as follows:

[0017] A 10kV medium-voltage direct-mounted DC micro-grid system, including 10kV direct-mounted DC micro-grid front stage and energy storage, photovoltaic, DC / DC charging pile, DC...

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Abstract

The invention discloses a 10kV medium-voltage direct-hanging type direct-current microgrid system, which comprises a 10kV direct-current microgrid charging station preceding stage, an energy storage system, a photovoltaic system, a charging pile system, a direct-current load system and a wind power generation system, wherein the input end of the 10kV direct-current microgrid charging station preceding stage is directly connected with a 10kV power grid, the output end of the 10kV direct-current microgrid charging station preceding stage is a public direct-current bus and is used for the energystorage system, the photovoltaic system, the charging pile system, the direct-current load system, the wind power generation system and the like to be connected, and the energy storage system, the photovoltaic system, the charging pile system, the direct-current load system and the wind power generation system are connected into a large power grid through two-stage conversion. The 10kV medium-voltage direct-hanging type direct-current microgrid system has the advantages of low harmonic content, high and low voltage fault isolation, easy maintenance, bidirectional energy transmission and the like. According to the invention, an intelligent micro-grid can be established and is adjustable and controllable, energy routing and orderly charging are realized, and the impact on a power grid is reduced.

Description

technical field [0001] The invention relates to the field of DC microgrid design, in particular to a 10kV medium-voltage direct-current microgrid system. Background technique [0002] A 10kV medium-voltage direct-hung DC microgrid system is mainly used in the design of DC microgrids. The 10kV medium-voltage direct-mounted DC microgrid is a new type of intelligent DC microgrid that realizes voltage conversion and energy transfer in the power system based on power electronic conversion technology and electromagnetic induction principles. Compared with traditional DC microgrids, it can also achieve reactive power compensation, harmonic Wave governance, grid interconnection and many other functions. [0003] The traditional DC microgrid usually has the following structure: the power frequency transformer converts 10kV AC into 380V AC, and then converts the 380V AC into the DC voltage required by the DC microgrid. In order to reduce the harmonic interference and reactive power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/28H02J3/18H02J3/01
CPCH02J3/28H02J3/1842H02J3/01Y02E10/56Y02E10/76Y02E40/40Y02E40/30Y02E70/30
Inventor 范建华徐鹏飞李健勋王庆园李鸿儒张建李伟吴雪梅卢峰林志超程艳艳叶齐
Owner QINGDAO TOPSCOMM COMM
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