Diesel Generator Using Simscape Electrical

Hello,

I am trying to create a high fidelity diesel generator model that has controls for increasing/decreasing voltage and frequency. I have created a model using the older black outline simscape blocks but am looking to create a new model using the new simscape electrical blue outline blocks. All support is appreciated.

Answer 1

[Shivam Gothi]

Hello @Yazeed,

As per my understanding, you are trying to model a diesel generator using “simscape/electrical” library blocks. The diesel generator set contains a generator that is driven by a prime mover.

You can find different generator models in “Simscape/Electrical” library. Amongst them, I am giving the brief overview of the models that will be useful in your case.

Permanent magnet based:

1) PMSM (library: Simscape / Electrical / Electromechanical / Permanent Magnet)

It accepts three phase power supply as electrical input and has rotational ports “R” and “C” as outputs. You can connect prime mover across them. Refer to the documentation for more detailed information:

https://www.mathworks.com/help/releases/R2023a/sps/ref/pmsm.html

Field winding based:

Here, two additional electrical input ports are also given for the field winding DC supply. Here, the field is created by providing external excitation and not from the permanent magnet. These generators are more commonly used in diesel-generator set, as they are less costly as compared to PMSM.

As per IEEE standards, there are four models of Synchronous machine. All can be found in Simscape library as described below:

1) Synchronous Machine Model 1.0 (Library: Simscape / Electrical / Electromechanical / Synchronous)

Used to model synchronous machines with a field winding and no dampers. Refer to the documentation for more information regarding it:

https://www.mathworks.com/help/releases/R2023a/sps/ref/synchronousmachinemodel10.html

2) Synchronous Machine Model 2.1 (Simscape / Electrical / Electromechanical / Synchronous)

models a synchronous machine with one field winding and one damper on the d-axis and one damper on the q-axis. Refer to the documentation for more information regarding it:

https://www.mathworks.com/help/releases/R2023a/sps/ref/synchronousmachinemodel21.html

3) Synchronous Machine Round Rotor (Library: Simscape / Electrical / Electromechanical / Synchronous)

models a round-rotor synchronous machine using fundamental or standard parameters. Refer to the documentation for more information regarding it:

https://www.mathworks.com/help/releases/R2023a/sps/ref/synchronousmachineroundrotor.html

4) Synchronous Machine Salient Pole (Library: Simscape / Electrical / Electromechanical / Synchronous)

The Synchronous Machine Salient Pole block models a salient-pole synchronous machine using fundamental or standard parameters. Refer to the documentation for more information regarding it:

https://www.mathworks.com/help/releases/R2023a/sps/ref/synchronousmachinesalientpole.html

In addition, there is a shipped example that illustrates how to model Diesel-generator set as attached in the below link:

https://www.mathworks.com/help/sps/ug/emergency-diesel-generator-and-asynchronous-motor.html

You can refer the example and replace the “black outlined” generator block with any of above stated blocks as per your specifications.

I hope it answers the question !