Positive Negative sequence seperation with DDSRF

[smmuabd1]

I am building a cascaded H bridge model for unbalanced conditions and need a positive, negative sequence seperation approach, but any approach I have tried does not work so far are any pre built models or exampes of positive and negative sequence seperation for convertor control strategy.

[Bryan_Lieblick]

Please review the solutions in this previous forum post to see if they meet your needs.

Symmetrical Components Extraction in Natural abc Frame

Hello Nur, Signals in PLECS can only be real values. Symmetrical component decomposition is a phasor / complex number operation. You can use the “Fourier Transform” block from the library to convert a sequence of real-values into the magnitude and phase of the specified harmonic. Attached are two models that show different approaches to symmetrical component extraction. The “sequence_cscript” example is more conventional in that it takes the Fourier Transform of the real-valued inputs and th…