What are the real time data sources for power systems/ electrical machines?

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Markus Lienkamp

You probably need voltage and current per phase with about 100 Hz.

Mahdi Mahzouni-Sani

For the load data you can use the newyork independent ssystem operator website 1- (https://www.nyiso.com/).

For the machine constant you can find the power system toolbox (PST).

2- https://ieeexplore.ieee.org/document/8008586

3- W. Sauer Peter, M. Pai, and W. Chow Joe, “Power system dynamics and stability with synchrophasor measurement and power system toolbox,” 2017.

4- R. D. Zimmerman, C. E. Murillo-Sanchez, and R. J. ´ Thomas, “Matpower: Steady-state operations, planning, and analysis tools for power systems research and education,” IEEE Transactions on power systems, vol. 26, no. 1, pp. 12–19, 2010.