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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
Click here to download the Simulink Model:
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This example shows an induction machine used as a wind turbine generator.
The Simple Turbine block converts wind speed to turbine output power by a simple output power versus wind speed characteristic.
When the wind speed is below the cut-in speed or above the cut-out speed, the machine generates zero real power.
The machine always consumes reactive power. The Reactive Compensation block offsets the machine's reactive power requirement.
The local load consumes 75kW. The infeed from the power grid meets any wind turbine generation shortfall. When the generator produces more than 75kW, excess power is exported to the grid.
The reactive power compensator is dimensioned to supply 90 kvar when a 440 V phase-to-phase voltage is applied across its terminals.
https://orcid.org/0000-0003-1742-5526