Future grid stability, a cost comparison of Grid-Forming and Synchronous Condenser based solutions

Grid-Forming inverters have proven to be a key solution for future stability issues in the context of high penetration of power electronics in the grid. As synchronous condensers are presently used to locally solve such issue, this paper compares the costs of two deployment plan of the two solutions to ensure stability of a future realistic scenario in France for 2035. The needs will be based of on the latest work of MIGRATE for the Grid Forming (GFor) solution, and on ENTSOE requirement for inertia for the Synchronous Condenser (SC) scenario. The costs of the two solutions will be based on publicly available data of recent projects.