118 bus Test
118 Bus Test Case represents a portion of the American Electric Power System (in
the Midwestern US) as of December, 1962.
118 bus system contains 19 generators, 35 synchronous condensers, 177 lines, 9
transformers and 91 loads.
was downloaded from the IEEE power systems test case archive at .
diagram can be consulted at  and the data for the rate lines can be seen at
 and finally the data for generators have been taken from .
Single line diagram of the IEEE 118-bus test system
send submissions, questions and requests to
system test case archive’, available at:
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Liang, C. Y. Chung, K. P. Wong, X. Z. Duan. ‘Parallel optimal reactive power
flow based on cooperative co-evolutionary differential evolution and power
system decomposition’, IEEE Trans. Power Syst., vol. 22, no. 1, pp. 249-257,
 S. A.
Blumsack. "Network topologies and transmission investment under
electric-industry restructuring," PhD dissertation, Engineering and Public
Policy, Carnegie Mellon University, Pittsburg, PA, 2006.
 P. M.
Anderson, A. A. Fouad. Power system control and stability. New York: IEEE Press,
2003.  IEEE Recommended Practice for Excitation System Models for Power
System Stability Studies. IEEE Std 421.5-1992, 1992.