I have 11kV(resistance grounded) system with 34MW generator (STG) and grid with 132/11kV incomer - generator neutral is resistance grounded,When both system is operated in isolated mode each of system grounding will come to picture. If both (Grid and Generator) are running in parallel " WHETHER BOTH OF THE SYSTEM IS GROUNDED" or any one of system grounding to be removed to have the effective GROUND fault detection????????. if so which grounding to be retained. If both system is grounded if there is a fault say L-G fault the ground fault in the system is seen by both of earth fault relays in both of the system grid and generator also it is noted that current seen by the relays is not the actual current and also it depends on the location of the fault. Please explain how to provide system grounding.