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Negative sequence admittance (or impedance)

asked 2017-10-08 11:21:52 -0500

EEE1993 gravatar image


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!

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answered 2017-10-08 14:17:08 -0500

perolofl gravatar image

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:

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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 gravatar imageEEE1993 ( 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 gravatar imageperolofl ( 2017-10-10 00:01:23 -0500 )edit

answered 2017-10-10 19:42:21 -0500

EEE1993 gravatar image

Great, thank you!!

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Asked: 2017-10-08 11:21:52 -0500

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Last updated: Oct 10 '17