Generator repair method overload operation

Author：gdlhwt Time：2014-09-18  

Failures and problems in the process will inevitably occur various use diesel engine, overload operation also have happened. Long time overload operation may damage the power equipment, so in a timely manner to make generator repair work.

Overload will seriously affect our life demand, mainly the meet is stator reactive power meter indication exceeds the rated value, the current indicator produced exceeds the rated value and. The occurrence of these phenomena is the cause of out of step operation, the system short-circuit fault, exciter and groups of motor starting caused by. Usually the power processing unit repair method is to monitor the temperature of each part is not overrun, stator current rating.

If the system voltage is normal, then the possible mainly has the following several points:

1, if the AC excitation regulator channel fault caused by stator overload, the AC should be adjusted for cut to DC regulator operation. Repair remind should strengthen to the end, the slip ring and the commutator inspection. If it is possible to strengthen the cooling: reduce the entrance wind temperature, generator, transformer oil pump, fan adds group.

2, less reactive, the stator current is reduced to less than rated value, but the power factor of not more than 0.95, the stator voltage is not less than 0.95 times of rated voltage. Note that the stator current to allow the value of the elapsed time, not allowed to exceed the specified value. If the reduction of reactive power can not meet the requirements, then ask for instructions long decrease.

3, overload operation, should closely monitor the stator coil air cooler, before and after the cold, hot air temperature, vibration and swing, must not exceed the allowable value, and make detailed records.

No matter what happened power equipment fault should be timely generator repair work, otherwise it will affect the normal operation and use, can damage equipment.