Method for predicting life of transformer insulation and management system thereof

Abstract

The invention provides a method for predicting life of transformer insulation and a management system thereof. The technical proposal of the method comprises the steps as follows: firstly essential data is input; subsequently, transformer winding hot-spot temperature theta i, the total working-hour number of each hot-spot temperature tau i, each temperature relative heat aging rate Vhi, main transformer insulation each temperature relative life loss Li and insulation accumulation relative life loss Lh are calculated step by step; then the design life Lo of a transformer under a normal aging state is confirmed; transformer insulation remaining aging life Hrl is calculated; and finally, a recommended maintenance treatment measure is obtained. A product provided by the invention is the life management system consisting of a calculation / application server and software, a database server, an external system interface, a transformer primary side current and environment temperature measuring instrument, a web page server and a client browser. The invention has the advantage of being capable of predicting the remaining life of the transformer insulation quantificationally during a using stage.

Description

technical field [0001] The invention relates to a transformer insulation life prediction method and a life management system, which are used for online prediction of the transformer insulation life, and belong to the technical field of transformer insulation life prediction methods and life management systems. Background technique [0002] The transformer is the most important equipment in the power transmission and transformation system, and its operating status directly affects the safe operation of the system. Once a transformer accident occurs, the direct and indirect economic losses caused are very large. Under the action of electricity, heat, chemistry and electromotive force, the insulation of transformers in operation gradually ages. There are some preliminary regulations in IEC, IEEE and DL standards for the judgment standards of transformer insulation failure or insulation life. For a long time, judging the insulation status of transformers based on the results of...

AI Technical Summary

Problems solved by technology

However, regular preventive tests may lead to excessive maintenance and unnecessary downtime, and can only judge the aging state of transformer insulation and cannot predict the remaining life of transformer insulation. Transformer insulation life assessment and life management are still a new technology, online There is no suitable method and system available for predicting the lifetime of transformer insulation

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