10kV medium-voltage direct-hanging type energy storage power station system

An energy storage power station, direct-mounted technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, AC network load balancing, etc., can solve the problem of large standby and no-load losses, large harmonic content, problems such as low conversion efficiency, to achieve the effects of easy maintenance, low harmonic content, and reduced impact

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

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Problems solved by technology

When new energy and energy storage equipment are needed in the energy storage power station, it is necessary to invert the DC provided by the new energy and energy storage equipment into AC access, resulting in low conversion efficiency, large standby and no-load losses, and harmonic Disadvantages such as large content and high maintenance cost

Method used

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  • 10kV medium-voltage direct-hanging type energy storage power station system
  • 10kV medium-voltage direct-hanging type energy storage power station system
  • 10kV medium-voltage direct-hanging type energy storage power station system

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Embodiment Construction

[0016] Hereinafter, the specific embodiments of the present invention will be further described with reference to the accompanying drawings.

[0017] The invention provides a 10kV medium-voltage direct-mounted energy storage power station system, which can be used in the design field of 10kV medium-voltage direct-mounted energy storage power stations, and has the advantages of low harmonic content, high and low voltage fault isolation, easy maintenance, and bidirectional energy transmission.

[0018] The topological structure diagram of the 10kV medium-voltage direct-mounted energy storage power station applied by the present invention is as follows: figure 1 As shown, its appearance structure is as follows figure 2 As shown, its scheme design diagram is as follows image 3 shown, image 3 The programs described in include:

[0019] A 10kV medium-voltage direct-mounted energy storage power station system includes a 10KV energy storage power station front stage and a DC / DC ...

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Abstract

The invention discloses a 10kV medium-voltage direct-hanging type energy storage power station system, and belongs to the field of energy storage power station design. The system comprises a 10KV energy storage power station preceding stage and a DC/DC bidirectional energy storage converter, wherein the input end of the 10kV energy storage power station preceding stage is directly connected with a10kV power grid, the DC/DC bidirectional energy storage converter is connected with the output end of the energy storage power station preceding stage, and the 10KV energy storage power station preceding stage and the DC/DC bidirectional energy storage converter are subjected to two-stage conversion. According to the invention, the 10kV medium-voltage direct-hanging type energy storage power station system adopts a power electronic technology, the alternating current of a 10kV power grid is directly converted into 750 V direct current through a 10KV energy storage power station preceding stage, and then the 750 V direct current is converted into a voltage needed by an ultra-large battery pack through a DC/DC bidirectional energy storage converter; the 10kV medium-voltage direct-hanging type energy storage power station system has the advantages of low harmonic content, high and low voltage fault isolation, easy maintenance, bidirectional energy transmission and the like; a 750V directcurrent interface is provided, so that new energy and energy storage equipment can be directly accessed, an inverter stage is omitted, the efficiency is improved, and the cost is reduced; and the system is provided with various communication interfaces, so that an energy routing distribution function can be realized, and flexible power transformation and distribution and new energy flexible access are realized.

Description

technical field [0001] The invention relates to the field of energy storage power station design, in particular to a 10kV medium-voltage direct-mounted energy storage power station system. Background technique [0002] The traditional energy storage power station usually has the following structure: the power frequency transformer converts the 10kV AC into 380V AC, and then converts the 380V AC into the DC voltage required by the battery pack for charging. When the new energy and energy storage equipment needs to be connected in the energy storage power station, it is necessary to convert the DC inverter provided by the new energy and energy storage equipment to AC access, resulting in low conversion efficiency, large standby and no-load losses, and harmonics. Disadvantages of large content and high maintenance cost. SUMMARY OF THE INVENTION [0003] In order to solve the above problems, the present invention proposes a 10kV medium-voltage direct-mounted energy storage po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/01
CPCH02J3/32H02J3/01Y02E40/40
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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