Research on comprehensive optimization strategy of transformer thermal life in digital substation

Abstract

With the national advocacy and vigorous promotion of new digital infrastructure, digital assessment of transformer operation state based on digital twin technology has become one of the hot issues in the power field. In this paper, taking an oil immersed transformer as an example, the magnetic, current and thermal multi field coupling numerical analysis method is used to simulate and analyze the operation state of the transformer, monitor the multi state characteristic parameters of the transformer through sensors, integrate the numerical simulation analysis results with the state monitoring results, and build a transformer thermal life loss evaluation system. This method can evaluate and analyze the operation status of transformers in real time, which is of great significance for power companies to formulate governance measures. It can effectively support the national new digital infrastructure strategy and contribute to the national strategy while satisfying the normal operation of power grid enterprises.