Marine Full Electric Propulsion Power System

This example shows a representative marine half-ship electrical power system with base load, hotel load, bow thrusters and electric propulsion.

The principal components of the system are:

• 30 MVA Gas Turbine, Round Rotor Alternator

• 5 MVA Diesel Generator, Salient Pole Alternator

• 11.5 MVA Base Load

• 6 MVA Switched Hotel Load

• 20 MVA Average-Value Propulsion Rectifier

• 1 MVA Direct Online Start, Squirrel Cage Bow Thrusters

The sequence of events during the simulation is:

• 10 seconds - Hotel Load disconnected

• 20 seconds - Propulsion begins ramping up

• 30 seconds - Full power ahead

• 40 seconds - Propulsion begins ramping down

• 50 seconds - Bow Thrusters start up

• 60 seconds - Hotel Load connected

Model

Simulation Results from Simscape Logging

The plot below shows the diesel generator and gas turbine power outputs.

Results from Real-Time Simulation

This example has been tested on these platforms:

• Speedgoat™ Performance real-time target machine with an Intel® 3.5 GHz i7 multi-core CPU and 4 GB RAM.

• dSPACE® SCALEXIO LabBox with Intel® Core XEON E3-1275v3 at 3.5GHz and 4 GB RAM.

You can run this model in real time with a step size of 400 microseconds by using the Simscape local solver. For small sample rates, a task overrun might occur during the initial task execution due to a cold cache. To avoid this overrun, if the selected platform supports these options, relax the start-up behavior by specifying a limited number of task overruns or increasing the sample time of periodic tasks during the start-up phase of the real-time application.