Setting up the load profile for a asyncronous motor

I'm designing a diesel electric propulsion system, but as the title indicates, I'm having trouble with setting it up against a load profile which I have at my disposal. The load profile is the power load profile of a ship.

The pictures shows how the setup is. I have two main generators which are 666kVA each, and a motor with a rated apparent power of 837kVA.

I've modified the system which Matlab/Simulink had beforehand, which is called pe_marine_electrical_system.

Any suggestions of how the load profile can be implemented to the asynchronous motor?

Answer 1

[Sebastian Castro]

Is the issue that your load profile is power but you can't provide power directly to the Simscape network?

If you have R2014b or later:

The Machines sublibrary has "Machine Mechanical Power (pu)" and "Machine Mechanical Power (si)" blocks you can use to actuate the machine. Just make sure the parameters of this block match your machine block.

If you have R2014a or earlier:

First, you will need to provide inertia to the machine with a "Machine Inertia" block.

Next, you could always measure the rotational speed of the motor with an Ideal Rotational Motion Sensor and divide it by that input signal to get a torque input.

That is, POWER = TORQUE * SPEED or TORQUE = POWER / SPEED.

- Sebastian