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Positive Sequence Detector

  1. Mar 10, 2017 #1

    I am studying a positive sequence detector and have some trouble understanding it. I understand most of it, but the author in the book "Instantaneous Power Theory and Applications to Power Conditioning" writes:
    For extracting the fundamental positive-sequence voltage with the dual method shown in Fig. 4-27, the amplitude of the auxiliary currents i'alpha and i'beta are not important, and can be chosen arbitrarily.

    I dont understand why the amplitude of the currents from the PLL circuit does not matter. I have simulated this in Simulink and verified that the circuit works. Does the amplitude cancel each other out behind all the math in some of the blocks?

    Best regards

    Source: Instantaneous Power Theory and Applications to Power Conditioning
  2. jcsd
  3. Mar 13, 2017 #2
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