The Analyses Of Isolated Phase Bus And The Development Of Simulation Software

Isolated Phase Bus (IPB) in power plants is used to connect all kinds of generator and power transformer. With the increasing of individual generator capacity, the rated current of generator is also increasing. IPB's working performance is related to its current and voltage. The influence of IPB's current to its working performance involves electromagnetics; calorifics and mechanics; IPB's voltage affects its insulation. Many works on magnetic, temperature, structure and electric field of IPB, including theoretically mathematical formulation, algorithm, program, are mainly researched in this paper with FEM theory. at the same time IPB simulation analysis software is developed, and some valuable results to theory analysis and engineering design have been gained.In the first part of this paper, the development of IPB and significance of studying by field method are discussed. Secondly, algorithm of magnetic, temperature, structure and electric field on IPB are confirmed. Insulation, short circuit force, temperature rise and structure deformed are simulated analysis. In the end, IPB simulation analysis software is developed and can realize parameter modeling, loading and extract valuable data from result database file.The current software ANSYS is adopted in this paper, and a coupling analyses method is established too. By using APDL language, the program for coupling field calculation is made. The coupling analysis on the electromagnetic field and structure field and the coupling analysis on electromagnetic field, temperature field and fluid field are calculated by this method. The coupling on electromagnetic field and structure field begin with the analysis of short circuit current of system. Under the circumstances of short circuit, IPB receive prodigious force. The force used as load brings to structure analysis. The coupling on electromagnetic field, temperature field and fluid field begin with the energy loss of bus in the course of working. Then the loss is used as load of temperature field and fluid field. The results are compared withthe theory, and the error is in the allowable range. It testifies that the method adopted in this paper is feasible.IPB's performance is examined by the distribution of electric field intensity; temperature rise and deformation result from short circuit force. In this paper, the distribution of all kinds of fields is vividly displayed. The results in this paper provide the theoretic reference gist and thoughts for the design and the further research on the IPB.