Dear all, I am wondering if someone can explain the reason behind choosing the certain number of buses such as 9 bus, 14 bus, 39 bus and so on for the standard test systems? I know these systems represent some portions of existing power grid networks for example IEEE-14 Bus system is a portion of *American Electric Power System (in the Midwestern US) as of February, 1962.*
But other than this is there any other reason of standardization of the test systems? Best Regards, *Yogesh Kumar* *Graduate Research Assistant* *NE 2042, EECS Department* *University of Toledo, OH 43507* *+1 (419)530-8295 <%2B1%20%28419%29450-2217>*
