Selection method of grid-connected location of microgrid based on fuzzy hierarchy analysis

Abstract

The invention discloses a micro-grid connection position selection method based on fuzzy hierarchical analysis. The micro-grid connection position selection method based on fuzzy hierarchical analysis comprises the steps of obtaining the micro-grid connection generating capacity, a power distribution network frame structure and a power distribution network line data; confirming a micro-grid connection position candidate set; selecting comprehensive evaluation indexes of a micro-grid connected power distribution network and adopting a fuzzy analytic hierarchy process to confirm relative weight coefficients of the comprehensive evaluation indexes; establishing a decision-making model selected for the micro-grid connection positions; respectively connecting micro-grids to the connection positions in the micro-grid connection position candidate set and adopting the decision-making model to obtain an optimal connection position. The micro-grid connection position selection method fully considers physical conditions including geographic position, natural resources, the power distribution network frame structure and the like, can effectively express the uncertainty of distributed power supplied in the micro-grids, has good applicability and economy, can achieve micro-grid and power distribution network benefit maximization and has good popularization benefit.

Description

technical field [0001] The invention relates to a method for selecting a grid-connected position of a micro-grid, in particular to a method for selecting a grid-connected position of a micro-grid based on fuzzy hierarchical analysis. Background technique [0002] An important aspect of building a microgrid is the location selection of the microgrid. The traditional power grid is a one-way flow power supply mode from power source to load. The access of micro grid will change this operating characteristic, and will affect the voltage, line flow, line current, power quality, relay protection and network reliability of the micro grid access point. Sex and so on will have an impact, and the degree of influence is closely related to the location of the microgrid. Due to the limitations of resource environment, geographical location, distribution grid structure and existing national policies, it is often difficult for the actual microgrid to be integrated into any position of the ...

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Problems solved by technology

This method has a certain reference significance for the selection of the grid-connected location of the microgrid, and some modified contents can be applied to the microgrid. However, this method does not consider the actual situation of the project, and ignores the constraints of geographical location and resource conditions. not fully applicable in

[0004] Due to the fluctuation of the output power of each distributed power source in the micro-grid and the uncertainty of the load, the operation control of the micro-grid is very complicated, and it will have various impacts on the distribution network after being connected to the grid.

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