Previous in Forum: Difference Between Relay and Release   Next in Forum: Loading & Unloading of a Compressor
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
polerz
Commentator

Join Date: Jul 2010
Posts: 92
Good Answers: 1

Generator Parameters

01/16/2011 7:28 PM

Hi all, im trying to spec this generator, looking at the datasheet for it, Xd (synchronous unsaturated reactance) is missing. I'm modelling the generator on SKM, and it has Xd as a per unit input which it links with the base kVA and voltage of the generator. Shouldn't Xd=1 pu? Since Xd is the steady state unsatured reactance which is computed from the base kVA, base voltage and hence base current?

__________________
 Electrical Engineer
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
nguyenkhoadung98
Active Contributor

Join Date: Aug 2010
Posts: 22
#1

Re: Generator Parameters

01/17/2011 10:51 PM

I have the same problem
Register to Reply
polerz
Commentator

Join Date: Jul 2010
Posts: 92
Good Answers: 1
#2

Re: Generator Parameters

01/18/2011 5:21 AM

My assumption was wrong, S=V^2/Z, where S=rated kVA, V=rated voltage, Z=Load+Xd (load = load placed on generator terminals to draw S(rated))

__________________
 Electrical Engineer
Register to Reply
jraubsr
Power-User

Join Date: Sep 2009
Location: Houston, TX
Posts: 118
#3

Re: Generator Parameters

02/11/2012 7:38 PM

Here's what I've found with LV generators. Using the default values makes almost no difference in using manufacturer's s.c. data. I deal alot with regulatory bodies such as ABS, USCG, DNV, BV, and on & on where most use 10 time the aggregate generators connected and 3-4 times the total motor loads. I wouldn't lose any sleep over it.

__________________
 Thank you for your help - By far the best info site!
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

jraubsr (1); nguyenkhoadung98 (1); polerz (1)

Previous in Forum: Difference Between Relay and Release   Next in Forum: Loading & Unloading of a Compressor

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (43 right now)
Show Members
Advertisement