HVDC load flow change in dynamic simulation

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Hi,

I have a network model in PSSE with some busses, genarators, load and 2-term DC line. For dynamic simulation I created a *.dyr file containing models for generators, but NOT for 2-term DC line since I haven't found credible parameters for it.

Right now I am performing dynamic simulation for a case where I need to change a setpoint(Setval) of 2-term DC line. I have tried to change that through Load Flow data tab. Equivalent to:

ierr,realaro = twoterminaldclinechng(dc, intgar, realari, meter)

This did not yield any results to my dynamic simulation. Is there any way to force change of HVDC setpoint in dynamic simulation?