Large-scale Electromagnetic Transient Simulation of the French grid: Challenges and Solutions

The simulation of Electromagnetic Transients (EMTs) of a large-scale network such as the French Transmission Grid is quite challenging. This network comprises more than 70 000 electrical nodes representing all voltage levels: 400 kV, 225 kV, 90 kV and 63 kV. Such a large network poses challenges both in building the model and achieving reasonable simulation times. Two solutions are proposed for data modelling and computation time. For data modelling, the Common Information Model (CIM) standardized format is used to import data from a planning tool into an EMT simulation. New enhancements are proposed for this automatic CIM/EMT interface. To reduce computation time, a sparse linear solver with partial refactorization and parallelization is employed. It further improves simulation performance, particularly in the solution of nonlinearities with substantial speedups.

Author: Boris Bruned
Company: RTE-France

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