Power Generation

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kasrop Associate Join Date: Nov 2016 Posts: 38	Power Generation 03/19/2017 2:47 AM
	Dear all good day generator 250MVA,200MW,PF 0.8 lag,if the power factor become unity can we increase the active power above 200MW thanks
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redfred Guru Join Date: Dec 2008 Location: Long Island NY Posts: 15603 Good Answers: 982	#1 Re: generation 03/19/2017 8:47 AM
	Yes. You can acquire a second generator. Make sure it can be synchronized. __________________ "Don't disturb my circles." translation of Archimedes last words
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jack of all trades Guru Join Date: Sep 2006 Location: Auckland, New Zealand Posts: 8777 Good Answers: 376	#2 Re: generation 03/19/2017 3:01 PM
	if the power factor become unity How? can we increase the active power above 200MW Why? 250MVA, this really looks like a homework question. __________________ jack of all trades
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RAMConsult Guru Join Date: May 2007 Location: NYC metropolitan area. Posts: 3230 Good Answers: 444	#3 Re: Power Generation 03/19/2017 6:10 PM
	Valid question, newbies and pros(?) often confuse the alternator rating (250MVA@0.8pf), with the prime mover operating point (250MW). The answer is it depends the rating of the prime mover and its ability to produce 250MW continuously; the alternator doesn't care as long as the operating point is within the GCC (Generator Capability Curve) and stability/voltage limits set by the system operator. __________________ “Tell me and I forget. Teach me and I remember. Involve me and I learn.” Ben Franklin.
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Codemaster Guru Join Date: Jul 2005 Location: Stoke-on-Trent, UK Posts: 4496 Good Answers: 137	#4 In reply to #3 Re: Power Generation 03/20/2017 5:48 AM
	GA from me too. I initially thought the answer was No but you convinced me! But not sure why you say in 1st sentence "....prime mover operating point (250MW)" As you say later, we don't know the prime mover power, except that it's not < 200MW. __________________ Give masochists a fair crack of the whip
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RAMConsult Guru Join Date: May 2007 Location: NYC metropolitan area. Posts: 3230 Good Answers: 444	#5 In reply to #4 Re: Power Generation 03/20/2017 8:51 AM
	That was a direct response to his query about loading the machine to a particular MW output. The shorter answer would be, "Assuming a fixed frequency, within its mechanical, electrical, and connected system limits, you can load your machine to any combination of MW, MVAR, and PF; but you can only choose any two out of the three." __________________ “Tell me and I forget. Teach me and I remember. Involve me and I learn.” Ben Franklin.
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James Stewart Guru Join Date: Mar 2011 Location: Lubbock, Texas Posts: 14331 Good Answers: 162	#6 In reply to #5 Re: Power Generation 03/20/2017 2:54 PM
	Very well done, sir! I totally agree, not only that, but also MW(th)›MW(e) every time, every day of the week, maybe twice on Sunday! Usually, three sides of a triangle only allow so much degree of freedom, and the rest is smoke (release). __________________ If it ain't broke, don't fix it. Just build a better one.
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