Causes of abnormal voltage of diesel generator set

The voltage of the diesel generator set is abnormal during use. So what causes the abnormal voltage of the diesel generator set? Diesel generator manufacturers will take you through it.

1. When the generator excitation current is adjusted to bring the generator reactive power to the minimum allowable limit, and the bus voltage is still higher than the voltage curve specified by the supervisor, the duty officer should immediately report to the duty supervisor for handling.

2. When the 220kV bus voltage is higher than the voltage curve range specified by the supervisor, the generator excitation current should be adjusted in time to make the bus voltage normal without waiting for the instruction from the supervisor.
3. When the 220kV bus voltage is lower than the voltage curve range specified by the supervisor, the reactive power of the unit should be adjusted without waiting for the instruction from the supervisor. If the bus voltage still cannot return to normal after reaching the rated output, the supervisor should be reported immediately to ask the system to adjust the voltage.
4. When the factory bus voltage drops to the "minimum operating voltage", in order to prevent voltage collapse, the unnecessary factory power load should be immediately reduced to restore the factory bus voltage to above the "minimum operating voltage" and move toward the value. report.
5. If the system voltage decrease and the frequency decrease occur at the same time, the method for handling the frequency decrease accident should be followed.