Hello, Shandong Huaquan Power will give you the answer:
Common causes and solutions of excessive generator voltage
(1) Cause: The speed is too high.
Treatment: Reduce the opening of the turbine water guide vanes and reduce the speed.
(2) Reason: The air gap in the shunt reactor core is too large.
Processing: Change the reactor core seal thickness and adjust the air gap.
(3) Cause: The magnetic field rheostat is shorted; voltage regulation fails.
Treatment: Find the short circuit point and eliminate it.
(4)Cause: Generator accident and speeding.
Treatment: Emergency stop for accident treatment.
The reasons for low power output and low voltage of three-phase AC synchronous generator: 1. The speed is too high. Treatment: Reduce the opening of the turbine water guide film and reduce the vspeed. 2. The air gap in the shunt reactor core is too large. Processing: Change the reactor core seal thickness and adjust the air gap. 3. The magnetic field rheostat is short-circuited; voltage regulation fails. Treatment: Find the short circuit point and eliminate it. 4. Generator accident and speeding. Treatment: Emergency stop for treatment of an accident.