Pleuripotent interconnected AC/DC hybrid micro power grid system and optimal configuration method

Abstract

The invention provides a pleuripotent interconnected AC / DC hybrid micro power grid system and optimal configuration method, and belongs to the field of micro power grid networking and optimal configuration. The capacity and the economy of the system are optimized; the isolated network operation is used as the majority, and the energy is sufficiently utilized by use of the pleuripotent interconnection method in triple generation of the cold, the hot and the electricity in the whole isolated network, the incorporation of multiple micro-source and the impact on the large power grid are reduced, and the energy can be utilized more reasonable; for solving the AC / DC switching problem, the AC / DC hybrid microgrid which is capable of satisfying the DC load and the AC load at the same time is constructed, and the system electric energy loss caused by repeated conversion is reduced; the pleuripotent interconnected AC / DC hybrid micro power grid is optimally configured, so that the whole system running is more reasonable, and the annual income of the micro power grid can achieve the maximum value.

Description

technical field [0001] The invention belongs to the field of micro-grid networking and optimal configuration, and in particular relates to a multi-energy interconnected AC-DC hybrid micro-grid system and an optimal configuration method. Background technique [0002] With the increasing demand for electricity, new microgrids have been developed rapidly; microgrids refer to micro power supply systems composed of distributed power generation devices, energy storage devices, energy conversion devices and loads, which can be integrated with large power grids Connected to operate in grid-connected mode, or in island mode. Usually, the two modes can be converted to each other to ensure the reliability of system power supply; but there are also big problems in the micro-grid at present, such as the storage cost of the micro-grid Very high and a large number of micro-sources are connected to the large power grid through the bus bar, which will have a certain impact on the large power...

AI Technical Summary

Problems solved by technology

[0002] With the increasing demand for electricity, new microgrids have developed rapidly; microgrids refer to micro power supply systems composed of distributed power generation devices, energy storage devices, energy conversion devices and loads, which can be integrated with large power grids. Connected to operate in grid-connected mode, or in island mode. Usually, the two modes can be converted to each other to ensure the reliability of system power supply; however, there are still big problems in the micro-grid at present, such as the storage cost of the micro-grid Very high and a large number of micro-sources are connected to the large power grid through the bus bar, which will have a certain impact on the large power grid, making the large power grid unable to run smoothly, and the load has not only AC load but also DC load. When supplying power to DC loads, AC power needs to be Convert to high-voltage direct current, and then convert high-voltage direct current to low-voltage direct current. Multiple conversions will cause loss of system power

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