Evaluation method of power transformer operation state and its field application

In order to scientifically and reasonably evaluate the operation state of power transformer in operation, a three-level evaluation model is established according to the key characteristic information of transformer. The health index theory is introduced to deduce the calculation method of health level of transformer three-level evaluation model, and the calculation formula of transformer residual life is obtained based on the theory. In order to facilitate the operation and maintenance personnel to quickly evaluate the operation status of the transformer on site, based on the above theory, using the programming language to carry out parametric modeling, a power transformer operation status evaluation software is developed. Finally, a representative case is given to illustrate the software method, and the scientificity and accuracy of the software are verified.