Research on the distribution thermal FEM model for an enclosed isolated phase bus-bar in short-circuit condition

Abstract

As the first power transmission part of synchronous generator output, the thermal stability of the enclosed isolated phase bus-bar (EIPB) is important for the working safety of the power system. The thermal stability of large synchronous generator-side EIPB is hard to be analyzed or calculated because of the complex structure and the large size of EIPB in the power system. In this paper, a new co-simulation method of EIPB is studied. Taking a certain type of EIPB in power system as example, the co-simulation method is applied. Based on the co-simulation method, the sub-segment FEM models are established and simulated. The temperature distribution in joint surfaces is transmitted between sub-segment FEM models. The temperature distribution of EIPB in short-circuit current under the cooling condition is calculated. The minimum ventilation rate in different environment temperature and different short-circuit current is calculated.