settings oof 32 relay
settings oof 32 relay
(OP)
Anyone know the typical settings of protection against motorization of gas turbine or atomic turbine?
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RE: settings oof 32 relay
Typical values in percent of nameplate rating to motor:
Condensing steam turbine 1 to 3 percent
non-condensing steam turbine 3 percent or more
2 cycle diesel 25 percent
4 cycle diesel 0.2 to 2 percent or more
single shaft gas turbine 100 percent
double shaft gas turbine 10 to 15 percent
RE: settings oof 32 relay
RE: settings oof 32 relay
The 32 device is to protect the prime mover, not the generator.
RE: settings oof 32 relay
I agree with dpc, if you can, get the information from the turbine manufacturer.
RE: settings oof 32 relay
Also, many steam turbine-generators use reverse power to prove that the stop valves are actually closed before taking the generator off-line.
RE: settings oof 32 relay
Second reverse power 7% with 0.2 Sec TD (Result of Gas turbine Trip)
RE: settings oof 32 relay
are these setting instantaneous ? Are there any stage of temporization?
GTstartup
what kind of turbine ?
RE: settings oof 32 relay
Gas Turbine - Major European Manuafacturer, 100MW range but I don't think it's much different for the larger frames.
First setting is not protection per se but how the generator breaker is normally opened. The second setting acts fast when the turbine trip valve is closed during trip.
RE: settings oof 32 relay
Look at GT Startup's info again: TD = Time delay.
You need a time delay, or else you'll often trip as soon as you synchronize. Again, the prime mover manufacturer is the best source of setting info, especially if it still under warranty.
RE: settings oof 32 relay
it is not so easy! there is a hierarchy of communication and responsibilities: owner, owner's engineering firm, company designer, consultant relay settings, salesman of the manufacturer, the manufacturer.
I am with owner's engineering firm.
I am asking for setting used by turbines YOU know, not manufacturer.
RE: settings oof 32 relay
Out of curiosity, I have checked and the settings provided by manufacturer generally fall within the typical ranges of 32-1 and 32-2 stated above for gas turbines.
RE: settings oof 32 relay
Dave
RE: settings oof 32 relay
No , it is not easy.
Chinese manufacturer of hydro turbine(bulb)-generator propose an emergence stop sequence for generator-turbine BUT client did not accept!
Thank you.
RE: settings oof 32 relay
RE: settings oof 32 relay
RE: settings oof 32 relay
For big steam turbine (>200MVA) set is about 0.5%.
BTW, GTstartup, I think for diesel its more or less same setting, as you wrote.
for hydro turbine, I do not know....
RE: settings oof 32 relay
Yes, it is for the same Project!
During the comissioning of a submerged generator and impellers , bubble turbine, was realized the generator motoring:
the motoring was in the range of -100% power, ie, a machine 80 MW, a received power of approximately reverse in the turbine-130MW . Generator absorver active power in a gradient of 40MW per second!
In the books of classic protection (Mason, Blackburn) the engine is in the range of 0.2-2% of the power generator ..
Books latest reported that the motors can be more than 2% when the turbine is fully immersed in water.
My question: What is more? 4% or 10%?
Reverse Power relay(32) was originally set for 5%, TD=20sec. After comissioning we are changing 32:
Stop valve close AND 32I (5% ,TD=1ms) operated => trip generator circuit breaker.
32T(5%, TD=5ms) operated => trip generator circuit breaker and stop machine.
Even with with this setting generator can be motorized with 40MW(1ms) or 130MW(5ms).
Anyway, I guess the books of protection for hydrogenerator stopped in 1960.
RE: settings oof 32 relay
Smallgreek,dpc,slavag
Yes, it is for the same Project!
During the comissioning of a submerged generator and impellers , bubble turbine, was realized the generator motoring:
the motoring was in the range of -100% power, ie, a machine 80 MW, a received power of approximately reverse in the turbine-130MW . Generator absorver active power in a gradient of 40MW per second!
In the books of classic protection (Mason, Blackburn) the motorization is in the range of 0.2-2% of the power generator..
Books latest reported that the motorization can be more than 2% when the turbine is fully immersed in water.
My question: What is more? 4% or 10%?
Reverse Power relay(32) was originally set for 5%, TD=20sec. After comissioning we are changing 32:
Stop valve closed AND 32I (5% ,TD=1ms) operated => trip generator circuit breaker.
32T(5%, TD=5ms) operated => trip generator circuit breaker and stop machine.
Even with with this setting generator can be motorized with 40MW(1ms) or 130MW(5ms).
Anyway, I guess the books of protection wen applied to hydrogenerator stopped in 1960.