Questions about Kundur system

[MuaYoi]

I feel very surprised about your hard work, but I also have some doubts and hope to receive your answer.
Q1: I am conducting some research using the kundur system which you provided. I find that all rows have the "trans" column of zero, even "Vn1" is not equal to "Vn2".
Q2: The input parameter values in this system seem to be inconsistent with the IEEE standard system. Is this your deliberate design, or can I find the xlsx file that uses the standard parameters?

I hope to receive your answers.
Best wishes for the success of your business.

[cuihantao]

Thank you!

The trans column is not used, but the handling of transformers are correct. The per unit impedances are assumed to be provided using Vn1 as the base.

There might be minor differences from the standard IEEE test systems. The test case was convertered from the raw file, which was created by J. Conto; it was used because it was available at the time. I haven't made the effort to match them exactly to IEEE systems, and you are welcome to contribute.

[MuaYoi]

Thank you very much, but I have one more question that why the phase angle θ of the slack generator change in TDS.

[cuihantao]

Slack generator is only valid in power flow. When you replace it with a dynamic generator whose M is not infinite, the generator speed changes so the bus voltage angle changes. Also check related books on power system analysis.

[MuaYoi]

I get it! Thanks for your reply and wish everything goes well with your work!