What Is The Reverse Power Protection Of An Ac Generator?

In power systems, there are cases where two or more generators run in synchronism with each other. In such cases, if one generator's prime mover fails, it operates in the motoring mode, thereby drawing power from the grid to run at synchronous speed. This causes unnecessary overburden on the healthy generators. To prevent this, we employ reverse power relays for each generator to detect any abnormal power flow and thereby isolate the generator from the circuit.