When setting initial parameters I only know how to set the basic parameters such as v and i, but is possible to set der(i) or der(v) values at initialization?

nonlinear system 972 fails: at t=0

proper start-values for some of the following iteration variables might help
[1] Real der(VSC10.Lc.inductor[3].i)(start=0, nominal=1)
[2] Real der(VSC10.Lc.inductor[1].i)(start=0, nominal=1)
[3] Real der(T4.inductor2.inductor[1].i)(start=0, nominal=1)
[4] Real der(T4.inductor2.inductor[3].i)(start=0, nominal=1)
[5] Real der(T4.inductor2.inductor[2].i)(start=0, nominal=1)
[6] Real der(VSC10.Lc.inductor[2].i)(start=0, nominal=1)
Solving non-linear system 972 failed at time=0.
For more information please use -lv LOG_NLS.
simulation terminated by an assertion at initialization
Simulation process failed. Exited with code -1.