simulink static power source

Hey guys,

I would like to find a way to insert a static three phase power source in my simulink model.

The static power source should supply a dynamic load with continious power of about 180 W. The dynamic load consumes these 180 W plus a variable value which is insert via an lookup-table. the variable values are supplied by a 3-phase programmable voltage source.

I have already tried to insert a current source with static current. And also tried to set the "load flow" in the voltage source to 180 W. But these did not work as expected.

Does anybody have an Idea how I can achieve my goal?

Thanks in advance