To simulate a load event you have to use the EvtLod. The load event works as follows:
1. Incremental change Certain percentage of current value, P = P + P*dP/100 (same for Q)
2. Absolute change Absolute percentage of nominal value, P = Pnom*dP/100 (same for Q)
3. Nominal value Internally used for reliability calculation (load growth), absolute change of nominal value

In the attached example two study cases are predefined, in the first one a ramp change on the load is simulated, while in the second one a step change is executed.