Application Value and Practical Reflection of High Voltage Test in Transformer Condition Evaluation System

In this paper, the mapping relationship between high voltage test items such as insulation resistance, dielectric loss, DC resistance, partial discharge and winding deformation test and transformer latent defects, overheating faults, mechanical deformation and weak insulation points is systematically sorted out, and the unique physical significance of high voltage test as "insulation mirror" and "structural stethoscope" is expounded. At the same time, the problems existing in current practice, such as multi-dimensional information fragmentation caused by data islands, time mismatch between fixed test period and dynamic evolution of equipment state, insufficient anti-interference ability in complex electromagnetic environment, and insufficient "fingerprint" feature mining of equipment by evaluation model, are deeply analyzed. On this basis, some improvement strategies are put forward, such as establishing a comprehensive diagnosis mechanism of multi-source data fusion, carrying out differentiated test strategy based on equipment health index, strengthening the anti-interference ability of field environment, introducing deep learning technology to improve fault prediction ability, and strengthening continuous monitoring and dynamic analysis of data, in order to promote the development of transformer condition evaluation in the direction of intelligence and accuracy.