An Optimal Planning Method for Grid Structure of AC-DC Hybrid Microgrid

Abstract

The invention discloses an optimization planning method for a grid structure of an alternating current / direct current hybrid microgrid. The optimization planning method comprises the steps of obtaining the basic data of the alternating current / direct current hybrid microgrid, wherein the basic data comprises a power supply output model, a load probability model and environment data; sampling the output of the power supply output model and the load probability model based on the environment data through a latin hypercube sampling method to obtain a sample matrix; establishing an optimization model of the grid structure of the alternating current / direct current hybrid microgrid, wherein the optimization model comprises target conditions and constraint conditions; solving the optimization model based on the sampling matrix to obtain multiple optimal solutions and the target condition values corresponding to the target conditions of each optimal solution; and choosing the target optimal solution from the multiple optimal solutions according to the target condition values, wherein the grid structure corresponding to the target optimal solution is the optimal grid structure. Therefore, the optimization planning for the grid structure of the alternating current / direct current hybrid microgrid is realized consequently.

Description

technical field [0001] The invention relates to the technical field of micro-grid optimization planning, and more specifically, to a grid structure optimization planning method for an AC-DC hybrid micro-grid. Background technique [0002] A microgrid is a small power generation and distribution system that organically combines systems such as distributed power sources, loads, energy storage devices, and control devices. There are many classification standards for microgrids. From the perspective of grid structure and power supply methods, microgrids can be divided into AC microgrids, DC microgrids, and AC-DC hybrid microgrids. Among them, the AC-DC hybrid microgrid refers to a microgrid that contains both an AC bus and a DC bus, and can directly supply power to both AC loads and DC loads, including AC sub-microgrids and DC sub-microgrids, while AC sub-microgrids The sub-microgrid and the DC sub-microgrid are connected through a bidirectional converter (or a bidirectional co...

AI Technical Summary

Problems solved by technology

However, the existing micro-grid optimization planning methods focus on solving the optimal configuration of AC micro-grids, but there is no optimal planning method that can effectively realize the grid structure planning and design for AC-DC hybrid micro-grids.

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