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Two-AC and one-DC series-parallel microgrid structure suitable for multi-station integration

A micro-grid and hybrid technology, applied in the direction of AC network load balancing, electrical components, etc., can solve the problems of inability to achieve overall load balance, low degree of integration, and low reliability of smart energy stations, and achieve simplified protection and control strategy, simplified structure and control strategy, and the effect of increasing grid reliability

Pending Publication Date: 2020-02-21
CEEC HUNAN ELECTRIC POWER DESIGN INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] The current smart energy station has low reliability, cannot achieve overall load balance, low degree of integration, low equipment utilization, narrow coverage, and low energy efficiency, so the system has poor adaptability and high cost investment

Method used

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  • Two-AC and one-DC series-parallel microgrid structure suitable for multi-station integration

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Embodiment Construction

[0025] The specific implementation of the present invention will be described in further detail below in conjunction with examples:

[0026] Such as figure 1 As shown, an example of a hybrid microgrid structure suitable for "multi-site integration" of "two-interchange and continuous" is formed by AC sub-microgrid 1, AC sub-microgrid 2, and a DC sub-microgrid hybrid; AC The sub-microgrid 1 is connected to the DC sub-microgrid through the power conversion device and the connection point 1. The AC submicrogrid 1 includes the No. 1 energy storage and station transformer, 400V / 380V isolation transformer, energy storage battery, AC / DC conversion Device; the No. 1 energy storage and station transformer is connected to the external network, 400V / 380V isolation transformer and AC / DC conversion device, the AC / DC conversion device is connected to the energy storage battery, and the AC sub-microgrid 1 passes through the 400V / 380V isolation transformer Connected to the data center air condit...

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Abstract

The invention discloses a two-AC and one-DC series-parallel microgrid structure suitable for multi-station integration. The series-parallel microgrid structure is formed by series-parallel connectionof an alternating-current sub-microgrid 1, an alternating-current sub-microgrid 2 and a direct-current sub-microgrid, wherein the alternating-current sub-microgrid 1 is connected with the direct-current sub-microgrid through a power conversion device and a connecting point 1, and the alternating-current sub-microgrid 2 is connected with the direct-current sub-microgrid through a connecting point2; the connecting point 1 and the connecting point 2 are DC / AC conversion devices, the connecting point 2 is a standby power supply point of the connecting point 1, the energy of the connecting point2 can only flow in one direction, and the voltage is rapidly supported for the direct-current sub-microgrid only when the connecting point 1 fails; the alternating-current sub-microgrid 2 comprises aNo.2 energy storage and station transformer, a 400V / 380V isolation transformer, an energy storage battery and an AC / DC conversion device; the NO.2 energy storage and station transformer is connectedwith an external network, the 400V / 380V isolation transformer and the AC / DC conversion device, and the AC / DC conversion device is connected with the energy storage battery. The series-parallel microgrid structure is high in reliability, wide in coverage, high in fusion degree and excellent in economy.

Description

Technical field [0001] The invention relates to the technical field of a hybrid micro-network structure, in particular to a "two cross-in-line" hybrid micro-network structure suitable for "multi-station integration". Background technique [0002] With the development of the energy industry, the energy structure has undergone tremendous changes compared with the traditional forms. The energy strategy of "adhere to the green and low-carbon leadership, strengthen the clean energy industry, and promote high-quality development" has integrated distributed energy and microgrid power supply technology. The development has pushed to the forefront of the new era. In recent years, the National Energy Administration has successively issued "Guiding Opinions on Promoting the Construction of New Energy Microgrid Demonstration Projects", "Notice on the Action Plan for Construction and Reconstruction of Distribution Networks (2015-2020)", etc., aiming to significantly increase the acceptance of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J5/00H02J3/32
CPCH02J3/32H02J5/00
Inventor 卢小龙孙志云谢彬徐婷婷谷昕钟怡
Owner CEEC HUNAN ELECTRIC POWER DESIGN INST
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