Numerical Calculation Of Dry-type Transformer And Temperature Rise Analysis

摘要

Comparing to oil transformer, the dry-type transformer minimizes explosion and fire hazard, as well as long product life. Meanwhile winding insulation plays an important role in the reliability, yet winding temperature rise may cause deterioration to the insulation. So it is critical to have temperature rise analysis for hot spot and prediction in the period of prototype design using finite element method, such as CFD. The key factors like completed boundary condition and coupling of electro-magnetic with thermal fluid will be obtained from experiment which could provide more accurate heat transfer coefficient for new design. Relative to method of thermal-network, CFD has provided more accurate air convection model and different boundary condition definition, thus it could be an original data for other serial product simulation.