Solar power station generator relay protection

Why do generators need auxiliary power relays?

With traditional relays, the management options are reduced because any failure of the power supply system would imply either the stop of the turbine or, what is worse, a non-protected generation scenario. The electrical protection of the generator cannot be left in hands of an auxiliary powered relay in order to ensure a non-stop protection.

What relay is used to protect a generator?

An overcurrent relay 51N or a differential relay 87G gives the protection for each generator. The transformer needs to generate a ground current of at least 50% of generator rated current to provide about 95% or more winding coverage. Figure 3.

What is a protection relay?

Protection relays protect the generator, prime mover, external power system or the processes it supplies. The fundamental principles that are covered in this course are equally applicable to individual relays and to multifunction numeric relays.

Why are protective relays important?

Conclusion Protective relays are indispensable in maintaining the safety and reliability of power systems. They provide various functions to detect and isolate faults, ensuring minimal damage to equipment and continuity of power supply. By understanding these key protective functions, engineers can better design and maintain robust power systems.