Published Paper Details:

A Reverse Power Relay is used to Monitor Generators while running in Parallel Condition. The Concept is When First Generator attains synchronous speed then it allows the next Generator to run to feed the power to the Bus. Now, Two Generators Feeds power to the Main Bus in the same direction. If anyone Generator meets any failure like Stator Failure then Prime Mover of the Generator acts as Motor [Like Getting Electrical Power and act Mechanical Power], Now Power From the Healthy Generator feed Power to the Failure Generator through Bus bar. This Action is termed as Motoring Action of the Generator. To Avoid 'Motoring Action', Reverse Power Relay should placed in individual Breaker Reserved for Generator. If Only one Generator in Action for your Plant, then it is not necessary to implement this Relay for the Protection Purpose. If Two Generators having different Rating with bus coupler, doesn't need Reverse Relay Protection. In the past, electromechanical relays were commonly used, now such relays have been replaced with high accuracy and high speed digital relays using Micro controllers. Fast operation of relay is desirable, particularly for such type of faults which could lead to system blackout. Digital relays offer other advantages also, in term of multiple variable settings and compact size.