Distribution transformer health state evaluation method based on real-time operation information

Abstract

The invention discloses a distribution transformer health state evaluation method based on real-time operation information. The method comprises the following steps: step 1, selecting evaluation indexes, i.e., selecting a load rate, a voltage bias, a three-phase imbalance degree, a harmonic total distortion rate as the evaluation indexes; step 2, quantifying the indexes, i.e., calculating a health state reduced score of each index, and accordingly, according to Si=100-SDi, obtaining a health state score Si of each index; step 3, distributing index weights, i.e., calculating a weight of each index by use of a weight varying method; and step 4, calculating a state evaluation score, i.e., after the weight of each index is obtained, calculating a health state integrated score S<operation> of a distribution transformer according to a formula indicated in the descriptions. According to the invention, the real-time operation information is taken as an evaluation index for combination with an existing state evaluation technology, such that the defect of timeliness of a conventional maintenance technology is made up for, and the health state of the transformer is reflected more timely.

Description

technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a method for evaluating the health status of distribution transformers based on real-time operation information. Background technique [0002] Condition-based maintenance can reasonably arrange maintenance resources, reduce maintenance costs and risks while ensuring reliability. In order to improve the operation reliability and asset management level of distribution network, the research on condition-based maintenance of distribution network has been paid more and more attention. [0003] Condition assessment is the first step in the implementation of condition-based maintenance. The current distribution transformer condition evaluation guidelines and corresponding research are based on information obtained by means of operation inspections, routine tests, and live detection. Due to the large number of distribution transformers, wide coverage, and limited hu...

AI Technical Summary

Problems solved by technology

Due to the large number of distribution transformers, wide coverage, and limited human resources, some operation and maintenance units cannot carry out inspections, routine tests, and live detection of distribution transformers in a timely manner according to relevant standards, resulting in a lack of timely and effective distribution transformers. It is difficult to find out the risk of failure through condition evaluation before the distribution transformer fails, and then implement condition-based maintenance

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