Hello, I am doing simulink model of power system stability using PSS2C, how to get power signal to input Vsi2 of Pss2c

I am making a power system stability model using pss2c, including 2 generators and 2 loads, how to get the power signal at the output of the generator and put it into the Vsi2 input of the pss2c

Answer 1

[Felipe]

In short, if you're using a Synchronous Machine Round Rotor block from Simscape Electrical as the generator (or a Synchronous Machine Salient Pole block), you can get all the measurements you need from the machine (including real, reactive and apparent power) by connecting the pu output port of the machine to a Synchronous Machine Measurement block. Here's an example:

The pu output port of the Synchronous Machine block is a vector of physical per-unit measurements (field voltage, field current, electrical torque, rotor velocity, d-q axis voltages and currents, etc.). The Synchronous Machine Measurement block allows you to extract any of those per-unit measurements or to compute additional ones derived from them, like the machine per-unit power for example.

Please note that you'll need to use a PS-Simulink Converter block between the output of the Synchronous Machine Measurement block and the input of the SM PSS2C block, to convert the physical signal output to a Simulink signal.

For more information, please check the documentation page of the Synchronous Machine Measurement block or those of the two Synchronous Machine blocks:

https://uk.mathworks.com/help/releases/R2025a/sps/ref/synchronousmachinemeasurement.html

https://uk.mathworks.com/help/releases/R2025a/sps/ref/synchronousmachineroundrotor.html

https://uk.mathworks.com/help/sps/ref/synchronousmachinesalientpole.html

Hope that solves your question.

Best,

Felipe