A repository of test cases for power flow, economics, dynamics, and geomagnetic disturbance analysis of power systems can be accessed at this website.
All test cases displayed at that website are non-confidential, and free to the public. These include use cases on synthetic electric grid data, such as the one shown below.
Credit: Adam Birchfield, Senior Ph.D. Student, Supervisor: Dr. Thomas Overbye, Texas A&M University
A. B. Birchfield, T. Xu, and T. J. Overbye, “Power flow convergence and reactive power planning in the creation of large synthetic power grids,” IEEE Transactions on Power Systems, to be published, 2018