PyPowSyBl import#
The PyPowSyBl import path is the supported path for CGMES import and for parallel PST group identification.
When grouped PST optimization is enabled downstream, parallel PST groups are derived during DC solver preprocessing from the Powsybl grid data. PSTs are considered part of the same supported group only when they connect the same voltage magnitude, share the same bus pair regardless of orientation, and have matching tap and phase-shifter parameters. The derived group metadata is persisted into the processed grid artifacts and later written to action_set.json as pst_ranges[*].pst_group.