Induction Motor become induction generator
Induction Motor become induction generator
(OP)
We have 3.3kV, 265 KW, 1484 RPM induction motor coupled with steam turbine, when speed increase more than synch. Speed (Is Motor will change to Induction generator to inject reactive power to 3.3kV Busbar),
what is status if speed become between 1484 to 1500 RPM,
How can know this current feed motor or inject Busbar from Current indication
Is any analog or digital AC current meter indicate negative or positive indication like DC current meter
If it available, please tell me type & manufacturer
Regards,
what is status if speed become between 1484 to 1500 RPM,
How can know this current feed motor or inject Busbar from Current indication
Is any analog or digital AC current meter indicate negative or positive indication like DC current meter
If it available, please tell me type & manufacturer
Regards,





RE: Induction Motor become induction generator
RE: Induction Motor become induction generator
To operate the machine as generator (supply active power to the line) you will have to increase speed slightly above 1500rpm, about 1516rpm to get nominal power.
RE: Induction Motor become induction generator
electricpete,
Thanks for your reply, I know about power meter or use reverse power protection and use it as alarm but my question about AC current meter
Is any analog or digital AC current meter, indicate negative or positive indication like DC current meter or not
Regards,
electricuwe,
Thanks for your reply, Actually our system drive Force Draft fan for Steam Boiler , they designed it for reliability (Two primover at same time)
My question ,
We have (power factor meter) at Incomer feeding this 3.3 kV Busbar, suppose it indicate 0.8 lag, what is the deviation in case our Induction Machine changed from Motor (P.F =?) to Generator (P.F =?), (assume other electrical loads at Same Busbar are constant)
Also, Is any analog or digital AC current meter, indicate negative or positive indication like DC current meter or not
Regards,
RE: Induction Motor become induction generator
RE: Induction Motor become induction generator
RE: Induction Motor become induction generator
A watt/var transducer may be appropriate for monitoring various modes [power ‘quadrants’] of machine operation. Exampli gratia, http://www.rochester.com/Pdf/wv15.pdf
RE: Induction Motor become induction generator
It sounds from your posts like you are expecting the induction generator to provide some reactive power to the system to lower the power factor. This will definitely not be the case, in fact, just the opposite. No matter which direction the real power (kW) is flowing (from the generator or to the motor), the induction generator or motor will always consume reactive power from the system. It is not like a synchronous motor that can be adjusted to either generate or consume reactive power by varying the field voltage. An induction generator always consumes reactive power.
RE: Induction Motor become induction generator
Can anyone give me Internent sites (more details about Induction Generators)
Regards,
RE: Induction Motor become induction generator
WHERE DO YOU LIVE ?
I THINK YOU LIVE IN IRAN
RE: Induction Motor become induction generator
Thanks for your interest but I'm not from Iran
RE: Induction Motor become induction generator
http://www.yokogawa.com/TR/pdf/English/No31/P34_37.pdf
for a reverse power meter in addition to other mearuring functions. It includes its description and schematics.
RE: Induction Motor become induction generator
http://www.avointl.com/software/powerquality/PA9%20Rev%20I%203-01.pdf
for Power Flow direction metering option.
RE: Induction Motor become induction generator
Thanks for your comment,
It is useful for synchronous Machine
Please if anybody has an idea about application (in Industry) of Induction generator, just send it
Thanks
RE: Induction Motor become induction generator
Here's a start:
Thread237-23474
Thread237-26511
RE: Induction Motor become induction generator
Possibly: http://www.pge.com/tariffs/advice/tariffsheets/17365-17420.doc
RE: Induction Motor become induction generator
http://www.narragansett.com/filelib/pdf/ri_interconnection_policy_v1.pdf
for bi-directional metering,
http://www.thomasregister.com
and search for kWhr meters (bi-directional), e.g. check with
Meterman Supply Inc.
11890-R Old Baltimore Pike
Beltsville, MD 20705
USA
Tel: 800-936-6403
Fax: 301-595-1065
Product Description
Dist. Of Electric Submeters, Current & Potential Transformers, Sockets & Enclosures For National Meter Industries, E-Mon, Schlumberger, Global Power Products, T&B, Osaki, Landis, Gyr