IEEE standard for protective relaying for generators
IEEE standard for protective relaying for generators
(OP)
I tried searching the IEEE website but I could not browse it as it is acting funky. I do have a user name and password but still....the site isn't working for me.
Anyway I have a bunch of standards filled away but they are not labled by title they are labled by standard number...I.E. C37.91-2000
Could anyone give me the standard number for the standard I am looking for? I believe it will be titled "IEEE Guide for Protective Relay Applications to Generators"
Thanks!
Anyway I have a bunch of standards filled away but they are not labled by title they are labled by standard number...I.E. C37.91-2000
Could anyone give me the standard number for the standard I am looking for? I believe it will be titled "IEEE Guide for Protective Relay Applications to Generators"
Thanks!






RE: IEEE standard for protective relaying for generators
ANSI/IEEE C37.102-1996: Guide for AC Generator Protection.
RE: IEEE standard for protective relaying for generators
I am looking for curve that shows %Volts/Hz vs Operate time(minutes) simmilar to that shown on Page 37 of the relay applications to Transformers.
thank you for your propt response though
perhaps there is a reference out there somewhere that lists the standars by title instead of number?
RE: IEEE standard for protective relaying for generators
If your password is valid, you should be able to open the protective relaying standards page where they are listed by number and name.
Both standards say to consult the manufacturer. You might want to consult the manufacturer.
RE: IEEE standard for protective relaying for generators
I did not realise you were looking for a certain curve. (I suppose this question refer to thread238-146506?)
Try ANSI/IEEE C37.106-2003: IEEE Guide for Abnormal Frequency Protection for Power Generating Plants. Unfortunately I do only have a copy of the 1987-edition, but it seems as if it contains the curve you are looking for.
Regards
RE: IEEE standard for protective relaying for generators
RE: IEEE standard for protective relaying for generators
RE: IEEE standard for protective relaying for generators
RE: IEEE standard for protective relaying for generators
RE: IEEE standard for protective relaying for generators
The VTs you mention are presumably on the same bus? It is common to use two sets of VTs, one for the AVR and one for protection - there is frequently also some means of allowing the AVR to use the protection VTs in the event of losing its own set.
Regardless of the VTs used, the AVR limiters should have the ability to act to control a V/Hz excursion before the V/Hz relay causes a trip. Depending on the AVR this could be relatively slow if it uses a multi-stage system of PMG / pilot exciter / exciter / rotor. There are a lot of lags in such a system, making it sluggish to respond when compared with a directly excited design.
You should check your connection agreement with your grid operator. Most specify that generating units shall maintain output down to, say, 47Hz on a 50Hz system. Your V/Hz relay should not operate within the time peiod which your grid operator expects your set to be available. This sort of detail should have been made available to the generator OEM at the time of design.
In many cases the GSU transformer will get in to trouble with overfluxing long before the generator itself starts to approach saturation. You should consider whether the transformer has a lower V/Hz capability than the generator and protect it accordingly. On a close-coupled generator and GSU transformer, one relay can protect both.
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RE: IEEE standard for protective relaying for generators
If you set the V/Hz, OV and UV on the relaying to be more sensitive than the VR settings, you may get unnecessary relay operations. So you should verify what is set up in the voltage regulator control.