cogeneration plants

[saltukhan]

There are some questions of cogeneration power plants i need to ask you..
1- How is the feederthat feeds excess energy to or draws energy from the utility named ?
2- ?s there an important locking of circuit breakers on this feeder (I heard but dont know if there is one why?)
3-?s it important where the connection is made to the utility? distribution or transmission system makes difference??

 

[rbulsara]

saltukhan:

The seniors involved with this project would be able to answer your question more satisfactorily than any strangers on this forum.

It would be more productive if you work along with your senior engineers and gain some experience for a few years and brush up on you basics and then come to forums like this to ask basic questions.





Rafiq Bulsara

http://www.srengineersct.com

 

[saltukhan]

how i am supposed to work with senior engineers?? i just ask to be able to learn... searched enough but i hope to findanswers here to these simple questions.

 

[marks1080]

Basic answers to basic questions:

1. Follow the rules of your utility.
2. I don't know what you mean by locking. Do you mean interlocking?
3. Yes.

 

[saltukhan]

yes interlocking i mean, is there any interlocking when we talk about cogeneration feed that takes and send the excess power to a M.V or H.V utility.
also i want to learn the technical name of this feeder, for example in my country it is called as "autoproducer feeder"

 

[marks1080]

The interlocking depends on the design. Look for situations where you might have backfeeds between transformers etc... The system must first be engineered!

A feeder is a feeder is a feeder in this country. Is there a more techincal name?

 

[saltukhan]

okey got it, i think every country has its own conventional design, as i said autoproducer feeder is the feeder which connects the connection point to the cogen plant, two way energy flow occurs on it...

 

[transmissiontowers]

I'm a structural guy so have limited EE knowledge, but our Co-Gen connections are always at Transmission Voltage and usually at 138 kV.

_____________________________________
I have been called "A storehouse of worthless information" many times.

 

[alehman]

1. In the U.S.: Service or Interconnect.
2. Do you mean electrical protection? You must protection relays that disconnect the generator in the event of problems. This is a whole engineering topic to itself.
3. Yes. It depends on lots of things such as generator size, existing utility configuration and cost.

Alan
“The engineer's first problem in any design situation is to discover what the problem really is.” Unk.

 

[rcw retired EE]

Saltukahn- It is difficult to answer your question with anything more than "it depends".

A co-gen project may be 150 kW connecting to a 240V service or it might be a 1200 MW co-gen connecting to a 500 kV substation.

Some plants connect to transmission lines, some to distribution feeders and some just connect inside the owner's power system.

It depends on the local utility regulations and the laws and customs of the country.

All I design is co-gen plants. In 25 years in the business I do not recall a specific name for the plant interconnection feeder. If the engineering custom or practice in your area has a special name for types of connections, you will have to research the definitions.

So the answer to your comments is it depends on the plant size, location, interconnecting utility, voltage, regulations, local engineering practices and other factors.