Hierarchical distributed micro-grid energy-storage battery configuration method

Abstract

The invention relates to the technical field of a micro-grid, in particular to a hierarchical distributed micro-grid energy-storage battery configuration method which includes the step that lower-layer low-voltage bus storage battery configuration is carried out, wherein configuration is carried out according to functions of a storage battery in the micro-grid, and capacity configuration includes low-and-medium-frequency power fluctuation stabilization, peak load shifting and supply of voltage support for micro-grid system isolated island operation; lower-layer low-voltage bus super capacitor configuration is carried out, wherein according to functions of a super capacitor in the micro-grid, capacity configuration mainly includes local high-frequency load fluctuation stabilization; upper-layer high-voltage bus storage battery configuration is carried out, wherein according to the functions of the storage battery in the micro-grid, capacity configuration includes bus power fluctuation stabilization, system isolation island operation is maintained, and power factor compensation is provided for the whole micro-grid on a PCC point. By means of a precise configuration computing method, the power factor of grid-connected operation in the micro-grid is unique, power fluctuation of the micro-grid and a large grid is effectively stabilized on the condition that clean energy is fully used, and stability of voltage frequency of a system and continuous operation of important loads are effectively achieved.

Description

technical field [0001] The invention relates to the technical field of micro-grids, in particular to a method for configuring energy storage batteries in a hierarchical distributed micro-grid. Background technique [0002] In the microgrid, through a reasonable energy storage battery configuration scheme, the full use of clean energy within the microgrid can be realized, the impact on the large power grid can be reduced, and the impact of power outages on the normal operation of the microgrid can be effectively resisted. [0003] China Invention Patent Application No.: 201310007059.9, which discloses a multi-element composite energy storage capacity configuration method for microgrid groups. The main solution is to calculate the power generation and load of wind power generation and photovoltaic power generation in sub-microgrids within an arbitrary period of time Data; calculate the output power of wind turbines in the sub-microgrid; determine the output power of photovolta...

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Problems solved by technology

[0004] The above-mentioned energy storage configuration method is general in estimation and the type of energy storage is single, which is not instructive for practical applications, and is fundamentally different from the configuration method and application field described in the present invention.

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