Negative sequence admittance (or impedance)

asked 2017-10-08 11:21:52 -0600

EEE1993
7 ●5 ●6 ●7

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!

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answered 2017-10-08 14:17:08 -0600

perolofl

3322 ●1 ●8 ●18

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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