The current methods for evaluating the condition of transformers are overly subjective, and the evaluation results are discretized, making it difficult to accurately assess the equipment status. In this regard, this paper proposes a fault probability calculation method based on the stress-strength interference model to quantitatively describe the reliability level of transformers and support the risk assessment and digital and intelligent operation and maintenance of transformers. Taking the discharge fault as an example, the effectiveness of the proposed method is proved.

Power transformer,Failure probability,Stress-strength interference model