Dear Esmaeil,

I need generator's upper and lower limits and loss coefficients. By checking the above URL, i can't see generator's data and its coefficients to calculate optimum cost of electricity generation at particular demand. Can you provide some more guidance about that? Furthermore, if you know from where to download IEEE test systems data for economic dispatch, let me know.

Consult M.A.PAI book.It is having all kinds of data.

There are many sources on internet. If you do a basic search, you will reach official data. I can also help you if you cant find. All the best,

Aamir, it all can be found in the book ''Power system analysis'' - Hadi Saadat

Aamir,

It depends on the type of data that you need. You can find basic data in the below link:

http://www.ee.washington.edu/research/pstca/

DEAR 

YOU CAN REFER 1) POWER SYSTEM DYNAMICS AND CONTROL BY PRABHA KUNDUR/K R PADIAR/SAADAT ALI

I agree with Mr. Izudin, the book holds data.

Esmaeil Ghahremani has given the correct link.