Using the simulation time as a variable during a SimPowerSystems simulation

I was wondering if it was at all possible to use the simulation time as a variable in a SimPowerSystems simulation to calculate the rate of change of another variable while the simulation is running?

Also is there a function in matlab that can take in a time threshold and detect if a system variable goes above a certain limit for that threshold time?

I have tried using tic and toc functions as well as simtime but it did not work.

Answer 1

[Stephan]

Try the Simulink Source "Clock". The output of the Clock-Block is the current simulation time.

Answer 2

[K E]

You could use the Switch block to perform some actions once time passes a given limit, if that is what you want your model to do.