Research on Global Thermal Exchange of Large Synchronous Condenser Based on the PTDI Method

In order to research the cooling effect of complex multi-channel alternating ventilation system on large generators, the transient electromagnetic field model and global fluid–solid coupling model of 300 Mvar synchronous condenser are established. A method based on pressure–temperature double iteration is proposed to determine the boundary conditions of fluid–solid coupling model. This method can solve the problem of lacking outlet boundary conditions in the analysis of fluid solid interaction and consider the influence of outlet temperature on inlet temperature. Hundreds of millions of polyhedral grids are used to solve the global complex fluid–solid interaction heat transfer model of the condenser, and the distribution characteristics of fluid and temperature in the whole region of the condenser are obtained; The influence of the complex flow state of cooling air on the temperature distribution of the structure was discussed, and the cooling effect of the multi-channel ventilation closed air cooling system on the main structure of the condenser was studied. In addition, this article conducted temperature rise tests on the condenser, verifying the rationality and accuracy of the calculation based on the proposed method.