Transformer health state analysis method and system

Abstract

The invention provides a transformer health state analysis method which comprises the following steps: regarding a normal aging health state and an insulation operation health state of a transformer as health index analysis targets, and determining weight assignments of the two correspondingly; in the normal aging state, obtaining the health index of the transformer body; in the insulation operation state, selecting a plurality of index systems, obtaining the health index of each selected index system and the corresponding weight values according to a preset processing rule, and obtaining a new weight value of each selected index system according to the weight assignment of the insulation operation; and calculating the product of the weight assignment of the normal aging and the health index of the transformer body, and calculating the product of the health index of each index system selected under the insulation operation state and the corresponding new weight value, and regarding the sum value obtained by accumulating the plurality of calculated products as a comprehensive health index. The method can improve accuracy and reliability of health state assessment and defect diagnosis of the transformer, and provides information support and technological base guarantee for intelligent decision and analysis of a smart power grid.

Description

Technical field [0001] The invention relates to the technical field of transformers, in particular to a method and system for analyzing the health status of a transformer. Background technique [0002] The power transformer is the core component of power grid energy transmission and plays an extremely important position in the power system. Its safe operation is the primary guarantee for the safe, reliable and stable operation of the power grid. According to the statistics on the service life of power transmission and transformation equipment in some countries by the International Big Grid Conference, the current average design life of transformer equipment is 40-45 years. Due to differences in actual operating conditions and load changes, the actual remaining life of transformers in operation varies greatly. . [0003] In order to avoid the huge economic losses caused by blind replacement of transformers and the potential safety hazards caused by unfounded continued operation, it...

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Problems solved by technology

[0004] The online monitoring system and production management system of transformer equipment that have been applied are mostly independent of each other, and different online monitoring systems often have single functions and different communication standards, so it is difficult to carry out system integration and information fusion and sharing, making multi-parameter information fusion and sharing and Technologies such as comprehensive evaluation and diagnosis develop slowly and do not meet the requirements of smart grids

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