what will happen?
what will happen?
(OP)
what will happen if a generator is not synchronised correctly to a power grid.ie what if one of the conditions arent met and you close the breaker.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: what will happen?
What happened was that we lost the 110 kV line - not just the generator - and that the phones started ringing a lot. No damage to the generator or switches or anything else.
This happened when I was at school and was doing summer work at a power station. It was a week-end and all the other guys had left the premises when someone called and asked me to connect G2 to the grid. But he didn't tell me about the delay in the breaker.
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: what will happen?
----------------------------------
Sometimes I only open my mouth to swap feet...
RE: what will happen?
RE: what will happen?
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: what will happen?
RE: what will happen?
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: what will happen?
In our case, the foundation was cracked. But amazingly, the 1920s vintage machine was OK. They don't build them like that anymore.
RE: what will happen?
I started to ask questions when I saw that every time they brought a machine online, the scope would jump to the one o-clock position. It was something like all the generators having the PTs line to line and the main board having the scope PT connected line to neutral. I am still amazed at how little damage was done.
respectfully
RE: what will happen?
A large steam turbine was accidently put back on line just after its high voltage ring bus breakers were opened. The turbine's GSU transformer HV disconnect switch shaft broke and gave the operator false indication that the turbine was isolated. Standard procedure was to close up the ring bus for security once the offline unit was isolated. When the first breaker closed out of synch, the spinning turbine tore loose from the foundation and rolled through the control room. Flying parts killed a truck driver on the public road next to the plant. Operator survived. (Story told to me by two electrical designers for that utility. Can't vouch for its veracity.)
(Note that the typical "Inadevertant Energization Protection" scheme would not catch this failure since the turbine was still at speed and voltage.)
You always want to close the breaker in synch, or darn close to it. Especially if the unit is big.
RE: what will happen?
RE: what will happen?
RE: what will happen?
RE: what will happen?
RE: what will happen?
RE: what will happen?
There is some useful info and some product info!!
Good luck