Substation IED's
Substation IED's
(OP)
Does anyone have a link to a good history in "simple" english of the move from electro-mechanical meters and relays to substation IED's and solid-state protection? I'm trying to convince someone on replacing 30+ year old meters & relays with some new technology that can communicate and feed into an energy management/SCADA system.
I'm looking for a white paper on the benefits of this "new" technology in substation applications. Thanks.
I'm looking for a white paper on the benefits of this "new" technology in substation applications. Thanks.






RE: Substation IED's
RE: Substation IED's
"Do you want to put all your 'Relay Eggs' in one Basket?"
Paper No. PCIC-98-22
You can purchase it through IEEE Explore.
RE: Substation IED's
* Numeric relays do not rely on physical mechanisms for sensing and operation.
* Numeric relays do not have jeweled bearings to maintain or contacts to burnish.
* Numeric relays impose a much smaller burden on CT circuits, resulting in more accurate measurement.
* Numeric relays can provide functions and combinations of functions not readily available in electromechanical relays, negative sequence being a prime example.
* Numeric relays provide sequence of event reporting.
* Numeric relays provide oscillographic records of fault events.
* Numeric relays also have communications and metering.
RE: Substation IED's
RE: Substation IED's
ht
(Copy and paste whole address)
Download chapter 7, Relay Technology.
Failure seldom stops us, it is the fear for failure that stops us - Jack Lemmon
Make the best use of Eng-Tips.com
Read the Site Policies at FAQ731-376
RE: Substation IED's
Training, setting, installation and commissioning are also factors to consider vis-a-vis the skill sets of the people doing the work. The young guns with no instrument repair skills may struggle with e-m, but may be happy using a computer to drive everything. Older people with an instrument fitter type of background may be better off with e-m and avoiding the computers. Horses for courses.
Some of the problems we have had with numeric realys have had me wondering sometimes if they are all they're cracked up to be. But then, they have proved themselves very useful on occasions.
My perfect relay - a CDG with built in fault waveform recorder!
Bung
Life is non-linear...
RE: Substation IED's
RE: Substation IED's
That was an excellent link.