PSSE-Based Dynamic Simulation of Western Regional Grid of India

Among the five regional grids of India, the Western Regional (WR) grid is the one consisting of voltage levels 765 kV, 400 kV, and 220 kV. The WR grid is considered as the spinal cord of the Indian grid as it delivers power to most of the heavy industrialized states, and hence is selected for analysis. In order to determine the weak area of the grid and perform stability studies, the L-Index algorithm is generally used. But for computation of maximum deviation of frequency, minimum time of voltage recovery, and critical clearing time (CCT) of the buses in a more detailed manner, the L-Index method is not infallible. Hence, for computing various parameters of the WR grid in a more detailed manner, dynamic simulation is performed. The WR grid has been modeled using 584 buses of voltage levels higher than 220 kV and transmission lines spread over the entire grid length of 86 220 km. In this work modeling, simulation and detailed analysis of the WR grid is accomplished. The L-Index algorithm clubbed with dynamic simulation provides the option of detailed analysis and computation of important parameters of the system, along with the prediction of weak area, which also acts as a parameter for designing various electrical protective equipment to be utilized in the grid.

Cite this article as: K. Gogoi and S. Chatterjee, “PSSE-based Dynamic Simulation of Western Regional Grid of India”, Electrica, vol. 21, no. 3, pp. 408-419,
Sep. 2021.