Load Dump on Diesel Generators
Load Dump on Diesel Generators
(OP)
I have two 2500KW generators online in parallel. If I trip the generator breaker on one thus forcing the other generator to take on greater than 100% rated load what type (KW,KVAr) of load, or combination of, would be best to put on the generator. I believe a power factor less than .8 would be best to stay away from the excessive rotor heating limit, but would something closer to a pf of 1 be better.
The problem I found was that the generator was not able to recover with the high demand of 3100kW it leveled off at 2620kW at 56.15HZ. However, it was able to fully recover within 2sec with 2850kW (same power factor, using load banks). The point of this testing is to initiate load shedding stages.
The problem I found was that the generator was not able to recover with the high demand of 3100kW it leveled off at 2620kW at 56.15HZ. However, it was able to fully recover within 2sec with 2850kW (same power factor, using load banks). The point of this testing is to initiate load shedding stages.






RE: Load Dump on Diesel Generators
Bill
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"Why not the best?"
Jimmy Carter
RE: Load Dump on Diesel Generators
RE: Load Dump on Diesel Generators
RE: Load Dump on Diesel Generators
RE: Load Dump on Diesel Generators
As Bill pointed out above, overload capacity is affected by a number of issues, and newer machines meeting US and other countries emissions standards make it unlikely you have lots of reserve capacity.
What does the engines manufacturer say?
The engine may exhibit differnet abilites to respond to the load changes due to turbo performance, also need to make sure there isn't a parameter in the ECM (likely this is an electronically controlled engine ?) that is limiting the fuel after it sees an apparent overload.
RE: Load Dump on Diesel Generators
wayne440:
3100kW is not a reasonable expectation on a 2500kW machine or for any machine. Exceeding the rating will cause under-frequency conditions.
Rafiq Bulsara
http://www.srengineersct.com