Current and Kw instabillity Diesel Gen
Current and Kw instabillity Diesel Gen
(OP)
Just wondering if anyone has encounted large current swings when parralling an alternator, controlled by an electronic engine
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Current and Kw instabillity Diesel Gen
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RE: Current and Kw instabillity Diesel Gen
Bill
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"Why not the best?"
Jimmy Carter
RE: Current and Kw instabillity Diesel Gen
If temporary, it is most likely improper sync window, that is voltage, speed and excitation, droop setting etc are not matched closely enough at the time of paralleling.
If it does not settle down, the issues may be further in components like AVR, exciter and governor.
Rafiq Bulsara
http://www.srengineersct.com
RE: Current and Kw instabillity Diesel Gen
RE: Current and Kw instabillity Diesel Gen
Offshore Engineering&Design
RE: Current and Kw instabillity Diesel Gen
We used to start some large motors with two generators in parallel, one with an electronic governor and one engine with a hydraulic governor. We couldn't start the motors first thing in the morning when the oil was cold. We had to warm up the engine for 15 or 20 minutes and then the dissimilar governors would work and play well together.
If your quadrature circuit (cross current compensation) has a poor connection, you may be shifting reactive current between the machines with very little impact on the engine control (throttle).
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Current and Kw instabillity Diesel Gen
Another area to check is the analogue speed reference to the actuator - for no loose connections.