Do you have any specific problem? Although I didn't used matpower before I was involved in some simulations in SimPowerSystem toolbox to Simulink. Maybe I could be able to figure out the answer for your problem.
yes, while running the matdyn simulation to introduce faults at different time instants am having only ieee 9 bus "dyn" file available. Can you help me do the same with other bus test cases as present in the matpower (like 14-bus, 30-bus etc.).
I also recommend you to use PSCAD software, which is more powerful than matpower. Please contact to me if you have any questions. Prof. Dr. Okan Ozgonenel
Just heard about Matdyn software (free?), but never used it before. Not sure it is a robust tool. Other free choice would be PST from RPI. All these tools do the same thing but compatibility would be an issue.