Calculation of RMS like dc signal for a sinusoidal signal using Simulink algorithm

I have Line-to-line sinusoidal voltage reading as L1-L2, L2-L3 and L3-L1. I want to get RMS-like DC-signal that is equal to 400V when input voltage is 400V when there is no unbalance. I want to implement it using simulink algorithm in the discrete solver environment. There is no buit in block in simulink to calculate this RMS value from a sinusoidal signal like in Simscape. Can anybody share any idea for the algorithm? Thank you.

Answer 1

[Fangjun Jiang]

The RMS Measurement block?

https://www.mathworks.com/help/sps/ref/rmsmeasurement.html

[Khaled]

I can't use Simscape Elictrical block and this is the main reason.

[Fangjun Jiang]

I see. You don't have the SimScape Electrical toolbox. If you don't have the DSP toolbox either, then you might want to use the MATLAB Function block to utilize the MATLAB rms() function.

https://www.mathworks.com/help/dsp/ref/rms.html

https://www.mathworks.com/help/matlab/ref/rms.html

Answer 2

[Mukendi Alonso]

You can get RMS block in elctrical-specialyse power system- sensor and measurement labery

Answer 3

[Samad]

Hi

To get DC quantity from 3ph balanced voltage, have a look at Park Transformation. https://www.mathworks.com/help/sps/ref/parktransform.html Simscape has the block to calculate this easily.

Regards