Generators represent highly valuable assets in electrical power systems. Their failure due to faults leads to an interruption in the power supply, potentially with far-reaching effects on downstream systems. Protection systems protect these components from the effects of electrical faults, mechanical faults and system disturbances ensuring reliable continued power supply to unaffected loads.
Typical generator protection includes:
- ANSI 24 overexcitation (V/Hz)
- ANSI 25/25A synchro-check and automatic synchronizing
- ANSI 27/59 undervoltage / overvoltage
- ANSI 27T time-dependent undervoltage
- ANSI 27Q reactive power / undervoltage
- ANSI 32 reverse / directional power
- ANSI 32N/G zero sequence power
- ANSI 40 loss of excitation
- ANSI 46 negative phase sequence