Time scale-oriented distribution transformer heavy overload judgment method

Abstract

The invention discloses a time scale-oriented distribution transformer heavy overload judgment method. The method comprises the following steps of 1, sampling original load operation data of a distribution transformer and discretizing the original load operation data into 24-point time series data; 2, performing feature extraction based on an LSTM-BP network on the time series data; 3, clusteringthe extracted features by using a fuzzy C-means clustering algorithm to obtain a plurality of clusters, wherein each cluster represents a feature rule of a certain specific heavy overload on a time scale; and 4, judging the heavy overload condition of the distribution transformer according to the heavy overload time characteristics of each distribution transformer. The method aims at distributiontransformers with different heavy overload characteristics; and different operation or transformation strategies such as operation mode adjustment, three-phase imbalance adjustment, selection of a short-time high-overload-resistant transformer, selection of an amorphous alloy transformer, selection of a dry-type transformer or an oil transformer, selection of an on-load capacity modulation transformer and the like are adopted in a more targeted manner, so that the scientificity and the economy of distribution transformer type selection and operation modes are improved.

Description

technical field [0001] The invention relates to a time scale-oriented method for judging the heavy overload of a distribution transformer, which belongs to the technical field of electric power big data. Background technique [0002] With the continuous increase of power demand, heavy overload of distribution transformers in distribution network occurs from time to time. The occurrence of heavy overload will accelerate the abnormal loss of internal components of the equipment, reduce the service life of the equipment, and even lead to the risk of direct burning of distribution transformers, power failures and other risks. According to the technical standards of the power industry, the heavy load standard of distribution transformers: distribution transformer load rate>=80% and <100%, and lasts for 2 hours; overload standard: distribution transformer load rate>=100%, and lasts for 2 hours. [0003] When the distribution transformer in a certain area is heavily overl...

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Problems solved by technology

Therefore, it will be a very unscientific and very uneconomical decision-making method to simply replace the large-capacity transformer according to the most basic definition of distribution transformer overload.

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