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I have a cable modeled in PSCAD. What I would like to do is have the program extract the positive/negative and zero sequence impedances in the simulation. What is the best way to do this? I tried what you would use to field test a cable in the field to get zero sequence impedances (apply a single phase voltage to 3 cables, shorted at the remote end to the shields, divide the voltage by the current). I used the FFT block for voltage and current. I was able to match the resistance of the zero sequence in this method but not the reactance. My Zero Sequence reactance was about 75% higher than the line constants calculation would have indicated.

See my attached model.

Thanks.

See my attached model.

Thanks.

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Open Jun 18, 2019 - 12:01 AM

Cables, Zero Sequence Impedance, line constants

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