New approach for assessing the risk of harmonic amplification on the French network.

Transmission grids have undergone significant transformations in recent years, driven by the integration of distributed energy resources, the reinforcement of infrastructure to ensure continuous operability, and the support of industrial users in decarbonizing their processes. As a result, Transmission System Operators (TSOs) are increasingly connecting radial underground cables, which can lead to harmonic amplification issues that degrade power quality. The French Grid Codes defined new requirements regarding harmonic voltages, specifying how the planning limits are shared between RTE and System Owners (SOs) [1]-[2].