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An AC/DC hybrid microgrid topology design method based on energy router

A DC microgrid, AC-DC hybrid technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of microgrids failing to achieve self-control, protection and management.

Inactive Publication Date: 2018-12-18
天津大学(青岛)海洋工程研究院有限公司
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Problems solved by technology

However, the micro-grid composed of distributed energy storage technology, wind power, photovoltaic and other distributed power sources and various loads of users has not been able to achieve self-control, protection and management.

Method used

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  • An AC/DC hybrid microgrid topology design method based on energy router
  • An AC/DC hybrid microgrid topology design method based on energy router

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] In order to effectively reduce energy loss during transmission and improve energy utilization efficiency, the present invention provides an energy router-based AC / DC hybrid microgrid topology design method, such as figure 1 As shown, the designed microgrid structure is a low-voltage AC-DC hybrid microgrid, and the microgrid system is connected to the local distribution network through a step-down transformer or an isolation transformer.

[0027] The AC microgrid part adopts a radial topology structure, which is convenient for centralized management of AC loads and renewable energy; the DC microgrid part adopts a double-ring topology structure, which consists of a unipolar DC microgrid (unipolar DC feeder 1) Together with the bip...

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Abstract

The invention relates to an AC / DC hybrid microgrid topology design method based on an energy router. The design method can separate a plurality of AC / DC submicrogrids, and directionally simulate various microgrid topological structures at present and in the future, so as to meet various requirements of microgrid research, including an urban campus-type microgrid, island-type microgrid, and family-type microgrid. The design and implementation of AC / DC hybrid microgrid, on the one hand, can effectively eliminate the negative characteristics such as intermittency and randomness of renewable energy output, provide reliable power supply to distribution network, and improve the efficiency of energy utilization; On the other hand, facing the future, the microgrid will gradually change from a single regional power supply system based on electric energy conversion, storage and transmission to an energy hub with simultaneous integration of multi-energy conversion and interaction such as naturalgas and thermal energy utilization. The hybrid AC / DC microgrid based on the energy router can integrate multiple types of energy systems, which lays a foundation for this.

Description

technical field [0001] The invention relates to the fields of smart grids, microgrids and AC / DC hybrids, in particular to an energy router-based AC / DC hybrid microgrid topology design method. Background technique [0002] Due to the development of large-scale and long-distance power transmission and distribution technology, most of the world's electricity uses AC transmission / distribution as the mainstream transmission mode. However, with the development of power electronics technology in recent years, DC power distribution or power consumption equipment has become more and more common. The traditional distribution network mainly adopts the AC power distribution mode, and a large number of DC power distribution equipment uses DC / AC converters or AC / DC rectifiers. The DC power distribution system can simplify a large number of AC-DC conversion links in the existing power distribution equipment, reduce energy loss in the transmission process, and improve energy utilization ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/38H02J2203/20Y02A30/60
Inventor 杨献莘王丹贾宏杰
Owner 天津大学(青岛)海洋工程研究院有限公司
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