Altium simulation time
The problem is that I have phenomenons that are happening at differents scales 


This is the classic case of an ill-conditioned simulation problem. It is fundamentally computationally expensive to simulate this kind of system.


  Do you know a way to make the simulation faster thant it currently is ?


The classic way is to use short duration simulations to study the behavior of the parts of the circuit with short time constants. Then replace those parts with simplified behavioral models to simulate the parts of the circuit with long time constants. 

Of course it requires engineering judgement to figure out exactly what needs to be included in the simplified models. And it may require changing the system design to make the fast components well-behaved (at least in the limit) in order to get a consistent result in the long-duration simulation.