Research on the calculation methods of enclosed isolated phase bus-bar in short-circuit condition

The enclosed isolated phase bus-bar (EIPB), which is the first power transmission part of synchronous generator output, plays an important role in the stability of the system in short circuit conditions. The section shape of bus-bar has very big relation with the dynamic stability of EIPB. In this paper, an analytical calculation model of EIPB is analyzed firstly. Based on the analytical model, the finite element method (FEM) and its model is established. The traditional rectangle bus-bar and circle bus-bar are calculated using this model. The performances under different conditions are discussed: with enclosures and without enclosures, AC. Taking the circle section EIPB for example, the relationship between the ratio of transfer current and the electrodynamic force safety are also discussed.