Eurostag is a package developed by Tractabel Engineering GDF Suez and RTE (France), which includes the following functions: load flow, dynamic simulation, critical clearing time calculation, eigenvalue computation and system linearisation, dynamic security assessment, model parameter identification and small signal analysis. One of the more unique features of Eurostag is the out-of-the-box modelling of power plant mechanical / energy conversion equipment such as boilers, gas turbines, etc.

Reference: Eurostag