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

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Khaled 2024-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/2094551-calculation-of-rms-like-dc-signal-for-a-sinusoidal-signal-using-simulink-algorithm

评论： Fangjun Jiang 2024-3-15

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.

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Answer 1

Fangjun Jiang 2024-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/2094551-calculation-of-rms-like-dc-signal-for-a-sinusoidal-signal-using-simulink-algorithm#answer_1425481

The RMS Measurement block?

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

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Khaled 2024-3-15

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

Fangjun Jiang 2024-3-15

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

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