Setting directional overcurrent protection parameters using hybrid GA optimizer

•Customized Hybrid Genetic Algorithm for Directional Overcurrent Protection Parameter Adjustment.•Algorithm for primary/backup relay allocation.•A case study with the proposed HGA in comparison with GAMS optimization solvers (BONMIN, DICOPT, KNITRO, AlphaECP, BARON, and SBB).•Usage of fault current angle to improve the solution quality.•Tests with real 138 kV transmission power and validation with CAPE software.