Gen with 2301A hogs load.

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VY1JA Participant Join Date: Dec 2007 Posts: 2	Gen with 2301A hogs load. 12/22/2007 2:16 PM
	Fellow Generator types, Setup: Several generators all on Woodward 2301A Load Sharing Speed controllers, set up for Load sharing. System load, about 4.5 Mw. Existing units of different types and speeds. A used Cat 3512 with a 2301A is added to the system and set up for load sharing. It is set up with the load gain at its highest setting. When the unit is placed on line in Droop it runs stable at all load settings. When the unit is set at 400 kW and switched to Isochronous it hogs load and will trip off unless put back in droop. Load Sharing bus ~ 2.2V, Individual unit Load Signal voltages about 3.5 V. PTand CT connections have been confirmed. The 2301A is known good. Two engineering companies gave up on this one. Any ideas to cause? Thanks,
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North of 60 Guru Join Date: Mar 2007 Location: Iqaluit, NU. Canada Posts: 1854 Good Answers: 140	#1 Re: Gen with 2301A hogs load. 12/22/2007 6:00 PM
	Ground loops on the control signals? Been a long time since I played with gensets so this question may be off the wall, have you scoped the signals looking for ripple? __________________ Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".
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VY1JA Participant Join Date: Dec 2007 Posts: 2	#5 In reply to #1 Re: Gen with 2301A hogs load. 12/23/2007 11:25 AM
	Hello All who responded. Defective 2301A's had been sent out to a third party (NOT Woodward) for repair and testing, and were returned as repaired. It turns out that the two of these which had been used as replacements for this work plus the original in the unit were all defective. It was disappointing to find that the repair depot did not do its work. Yesterday, a fourth 2301A, was installed, the system was tuned properly and works well. Thanks and seasons greetings to all who replied. Special greetings to a fellow also North of 60. J. Allen
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Anonymous Poster	#2 Re: Gen with 2301A hogs load. 12/22/2007 10:12 PM
	Q: "Existing units of different types and speeds." Define, Gaseous and Diesel fueled or just different Kw ranges?
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chaterpilar Power-User Join Date: Aug 2007 Location: Bhopal India Posts: 234 Good Answers: 5	#3 Re: Gen with 2301A hogs load. 12/22/2007 10:59 PM
	I am sure you must have checked this but just to clarify.... 1. Is the Load breaker Aux NO contact connnected to the 2301? If not, do that.This will let 2301 know that the load is ON. 2.The reason the CAT is hogging away the load is that it is running at higher speed than others.If you turn the load Gain Potentiometer clockwise you will decrease the load it will carry.If all sets are running in isochronous mode...then keep droop at minimum on CAT 3501. 3.I hope the sync input terminals of 2301 are in parrallel to other gens. Good luck __________________ He must be very ignorant as he answers all the questions he is asked. Voltaire
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ramvinod Guru Join Date: Jun 2007 Location: chennai,India Posts: 592 Good Answers: 19	#4 Re: Gen with 2301A hogs load. 12/23/2007 2:42 AM
	Can you give some more information. What is meant by unit set at 400kW ? I presume there are 3/4 sets operating in parallel.This set behaving satisfactorily when it is set at droop mode and operation in parallel. You said when it is set at 400 kw,this is set taking all the loads and trips off. Does this goes to isochronous mode automatically? What is the behaviour of other sets ? How is the response the governor response of this set and other sets. What is the ramp setting in the relay. __________________ Ramesh,Freelance Electrical/automation Consultant
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PUMPMAN Active Contributor Join Date: Dec 2007 Location: Villa ATEO, 43, Demashq Street, Mohandessin, Giza - EGYPT Posts: 13	#6 Re: Gen with 2301A hogs load. 12/24/2007 9:30 AM
	HAPpY NEW YEAR 2008 Yes, We can use a synchronizer to add the output of more than one GenSrt providing thar they ifentical in Voltage rating, say 400 Volts and friquancy, say 50 or 60 Hertz Check with the supplier/manufacturer of your gen unit to provide the syncro Good Luck PUMPMAN __________________ PUMPMAN is MAN for PUMPS
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djacob Commentator Join Date: Oct 2007 Location: Caribbean Posts: 79 Good Answers: 2	#8 In reply to #6 Re: Gen with 2301A hogs load. 12/27/2007 11:02 AM
	Re: Gen with 2301A hogs load. Nice work VY1JA. I do a lot of work on CATs and 2301As on off-shore platforms . I have one customer with three gens in parallel. I have had some difficulties but never a load hogging problem. can you forward your email address . I think we can benefit from mutual exchanges. Mine is d_jacob9@yahoo.com __________________ Learn more, Do more , Be more
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djacob Commentator Join Date: Oct 2007 Location: Caribbean Posts: 79 Good Answers: 2	#7 Re: Gen with 2301A hogs load. 12/27/2007 11:01 AM
	Nice work VY1JA. I do a lot of work on CATs and 2301As on off-shore platforms . I have one customer with three gens in parallel. I have had some difficulties but never a load hogging problem. can you forward your email address . I think we can benefit from mutual exchanges. Mine is d_jacob9@yahoo.com __________________ Learn more, Do more , Be more
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Anonymous Poster (1); chaterpilar (1); djacob (2); North of 60 (1); PUMPMAN (1); ramvinod (1); VY1JA (1)

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