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Negative sequence admittance (or impedance)

Hi

Do you know how can I add negative sequence impedance (or admittance) for transmission line? Transformer? Generator? And load?

When I open each of them Branch, I can only see positive sequence and zero sequence, I can see where I can add the negative sequence impedance?

In transformer, I can only see the positive sequence impedance and I'm adding the zero sequence admittance to (X01), but I don't know where to add the negative sequence admittance?

In generator, I can't find where I can add the X2 values?

Thank you for your help in advance!

EEE1993's avatar
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EEE1993
asked 2017-10-08 11:21:52 -0500
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Great, thank you!!

EEE1993's avatar
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EEE1993
answered 2017-10-10 19:42:21 -0500
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For passive elements like branches and transformers the negative sequence impedance is same as positive sequence impedance so there is no need to enter the values, Z2 = Z1. For generators there are data fields for negative R and negative X in the Machine tab in Network data spreadsheet. The Machine Data Record is shown below:

image description

perolofl's avatar
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perolofl
answered 2017-10-08 14:17:08 -0500
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Thank you so much! I also have to add negative G and B, it doesn't show it here? Do you know where is it? I only found the zero G and B?

EEE1993's avatar EEE1993 (2017-10-09 18:23:07 -0500) edit

Which component are you meaning? Shunts do not have negative sequence data fields in PSSE, Z2=Z1.

perolofl's avatar perolofl (2017-10-10 00:01:23 -0500) edit
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