Transformer substation clustering method considering both voltage sag monitoring information and associated factor thereof

Abstract

The invention discloses a transformer substation clustering method considering both voltage sag monitoring information and associated factors thereof. The transformer substation clustering method comprises the steps of establishing a voltage sag event monitoring information index and an associated factor index thereof; inputting voltage sag characteristic index data of a regional power grid transformer substation to be analyzed and carrying out normalization processing on the data; adopting a fuzzy C-means clustering method, clustering the regional power grid transformer substation to be analyzed respectively according to three voltage sag characteristic indexes to obtain clustering results in three dimensions; selecting a key index, adopting the fuzzy C-means clustering method, and clustering the regional power grid transformer substation to be analyzed according to the key index to obtain a comprehensive clustering result; and analyzing voltage sag characteristics of transformer substations of various categories by taking the comprehensive clustering result of the transformer substation as principle and combining the clustering results in three dimensions, and giving a preliminary voltage sag governance suggestion. The transformer substation clustering method provided by the invention has the advantages of comprehensive index setting, good classification effect, rich extracted information and the like.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a substation clustering method that takes into account voltage sag monitoring information and associated factors. technical background [0002] At present, the problem of voltage sag has become increasingly prominent, and has gradually become the most serious power quality problem. In particular, the voltage sag caused by the short-circuit fault of the main network has a deep degree of sag, a wide range of influence, and very serious harm. Taking the substations in the regional power grid as the object, it is urgent and reasonable to study the prevention and control measures of voltage sag. [0003] There are a large number of substations in regional power grids (such as provincial power grids and municipal power grids) in various places in my country. However, due to technical and financial constraints, it is difficult to prevent and control all substations in regional po...

AI Technical Summary

Problems solved by technology

[0006] When using a clustering algorithm for calculation, if too many indicators are used, it is easy to cause the disaster of dimensionality, the clustering effect is not good, and dimensionality reduction is required

At present, the algorithms used for dimensionality reduction include principal component analysis, factor analysis, etc., but these algorithms determine which indicators are key indicators based on the distribution of the data itself, and the selected indicators may not be the indicators that people are most concerned about.

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