Variation coefficient gray correlation degree based short circuit current suppression scheme evaluation method

Abstract

The invention relates to a variation coefficient gray correlation degree based short circuit current suppression scheme evaluation method. The variation coefficient gray correlation degree based short circuit current suppression scheme evaluation method comprises the following steps of step 1, determining evaluation indexes of every short circuit current suppression scheme; step 2, establishing an evaluation matrix and calculating the weight of every index; step 3, performing analysis on the gray correlation degree of every short circuit current suppression scheme. According to the variation coefficient gray correlation degree based short circuit current suppression scheme evaluation method, factors such as the current limiting effect, the influence on the safety of a power grid and the economic cost of various short circuit current suppression measures are comprehensively considered, the weight of every evaluation index is calculated by a variation coefficient method, the evaluation is performed on the 220 kV power grid short circuit current suppression schemes through the gray correlation degree analysis, and an optimal solution is determined according to the sorting of the calculated gray correlation degree of every scheme.

Description

Technical field [0001] The invention relates to an evaluation method in the field of power systems, in particular to a short-circuit current suppression scheme evaluation method based on the gray correlation degree of the coefficient of variation. Background technique [0002] The concept of smart grid puts forward higher requirements for existing energy infrastructure initiatives. It is not only necessary to consider technological upgrading, introduction and use of smart grids, but also to plan the use of smart grids to achieve economic growth. Due to the differences in the status quo of energy infrastructure and economic development goals in different regions, existing technologies focus on the issues addressed in the development of smart grids. [0003] As the interconnected power grids become more and more closely connected, the short-circuit current problem of 220kV power grids in areas where some large-capacity units are densely connected to the power grid has become promine...

AI Technical Summary

Problems solved by technology

[0004] The current limiting effects of different short-circuit current suppression measures have different impacts on system safety and economic operation. At present, the research on determining the optimal current-limiting scheme by evaluating the various effect indicators of different short-circuit current suppression schemes is still in the initial stage

Traditional short-circuit current suppression methods generally calculate and compare various measures one by one, and select several current-limiting measures based on experience, but it is difficult to achieve effective evaluation of different short-circuit current suppression schemes

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