0
Generator is moving 3000 RPM on 320Mw powerif full load rejected and any protection is not activate generator work as a motor what are damage possible?
Wiki User
∙ 14y ago
depends on many things, including the type of prime mover (what is powering generator?).
Presuming a steam turbine (or possibly combustion turbine though that's large for a single CT-gen) at that size and speed.
"Rejection" of load is a term often misused. I'll presume correct use in this case, meaning that the generator remains connected to the grid, but for some reason has stopped producing power.
If on the other hand what was meant was the generator was disconnected from the grid, it will not "motor". Upon rejection of load with no change in prime mover, the turbine would increase speed to a point where turbine over-speed protection would trip the prime mover to the turbine (fuel or steam), perhaps depending on design there may be some pre-emergency turbine controls to help reduce or control speed to below the trip point (perhaps about 110%, again depending on design). but if there is no controls that operate (including on turbine) turbine-generator unit may speed to point of damage (even destruction) as the centrifugal force of the higher speed exceeds design characteristics of the unit.
Back to original question... If the generator rejected load due to loss of its field current, or either an open or short circuit in the generator, it likely will not motor. However, if the generator remains wholly intact and connected to the grid (meaning the reason for rejecting load is the loss or reduction of the prime mover to the driving turbine), the generator will motor.
Possible generator damage could occur due to heating or pole piece shifting, depending on how sudden the change of phase angle (power flow) occurred. More likely, is (steam) turbine damage caused by overheating, most often starting with the lower pressure area blading.
It is not uncommon to "motor" hydro electric generators operating either as a pump, or as a synchronous condenser for voltage or VAR control. But hydro-turbine-generators operate much slower RPM, with larger mass and damage is not incurred.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Is it possible to turn a 2.7kva Honda generator into a welder generator?
No, the output voltage is too high.
What are some benefits of having an eco power generator?
Well you want it to be efficient since the idea of a generator is to give you power when your regular power source is down. If you power your generator with gas then you want the generator to use as little as possible and also to produce the cleanest exhaust possible.
Can DC series generator start on no load?
yes.it is possible to start dc series generator on no load condition
A generator transforms?
A generator transforms mechanical energy into electrical energy.
Is it possible to run a generator without voltage?
a big no
Is it possible to use standby as prime generator?
Yes
Why am I having problems with my dish signals after a generator starts?
The generator is producing electrical interference. If the generator is powering the satellite it might be the generator output is too 'dirty' (spikey or distorted output) or the generator is on it's minimum, or maximum, load limit. The main causes of random interference from a generator are the covers being left off or open and bad earthing. Where possible run power leads perpendicular to signal leads. Where it is not possible make sure there is good separation between power and signal leads. Confirm the integrity of coaxial shielding.
What piece of equipment is used to produce electricity?
Some possible answers are: a battery (which produces direct current) or a generator of electricity generator, such as a dynamo (which produces direct current) or an alternator (which produces alternating current).
Is it possible to repair the shield generator on Hoth Hunt in Star Wars Battlefront 2?
Yes it is, all you need is a fusion cutter and use it on the generator, its that simple!
What does a portable solar generator do?
A portable solar generator generates electricity for appliances using solar rays to power the appliances, which is possible due to photovoltaic cells.
Is it possible to load a shunt generator to short circuit and not injure the machine?
A
Where it is possible to order online replacement generator parts for temporary power use at home?
It is indeed possible to order online replacement generator parts for temporary power use at home by going to the site of manufacturer and ordering it.
