The stator is an important part of the generator, and its ground fault is one of the most common generator faults. When a ground fault occurs in the stator, an arc to ground occurs, which causes the stator core to burn. At the same time, the generator generates strong vibrations due to the asymmetry of the electrodynamic force.
Secondly, the purpose of stator earth protection is to detect whether the insulation resistance of the stator winding to earth has dropped to a dangerous value and whether a current is flowing through the stator winding to earth. When a ground fault is detected, the protective device quickly cuts off power to the generator to prevent the fault from spreading.
As for why 100% stator grounding protection should be installed, the reasons are as follows:
Protect the generator: the protectionion of stator grounding can detect grounding faults in the stator winding in time to avoid further damage to the generator.
Prevent the expansion of accidents: If ground faults are not dealt with in time, they can lead to more serious accidents, such as fires or casualties.
Ensuring the stable operation of the power system: The generator is an important equipment in the power system, and its normal operation is crucial for the stable operation of the power system. Stator ground protection prevents generator faults from affecting the electrical system.