Handling of fluctuations in power supply in reciprocating machines
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My plant’s reforming unit suddenly experienced a power fluctuation; after the reforming hydrogen booster (reciprocating machine) stopped operating, the crew immediately unloaded the system and tried to restart it. Upon turning on the switch, a phase short circuit occurred in the motor. What’s going on here? Isn’t it said that the reciprocating machine can be started immediately after unloading?
After a sudden shutdown, it is necessary to unload the equipment, close the outlet valve, open the return valve, restart the auxiliary machinery, and perform a rotation check to confirm that there are no issues with the unit before it can be restarted.
There is high-pressure gas in the compressor chamber; no pressure release was carried out, and the load when starting was too high, which likely caused the motor’s short-circuit protection to trip
I agree with the opinion above: after a cascade shutdown of the unit, it is necessary to determine the cause of the issue, and only after carrying out various cascade tests and shaft turning operations can the unit be restarted.