In response to yusuf comment.
It is possible to have only two AC busses in the AC system. I suppose that the two AC busses are the rectifier and the inverter commutating busses.
The sequential method implies executing successfully AC system and a DC system load flow analysis. Refer to the SimPowerSystems documentation regarding the usage of the load flow analysis function.
Sir Can u pls tell you got the base speed of 152.8 and also need an equation that govern the 2-mass train model. I will appreciate assiatance from every one. My email adress i firstname.lastname@example.org