ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 5 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Generator load hunting problem #129058
07/08/04 05:59 AM
07/08/04 05:59 AM
L
luckyali  Offline OP
Junior Member
Joined: Jun 2004
Posts: 7
pakistan
Three generators (1000KVA,800Kw,415V)are running in parallel almost on 500Kw each,but generator A is variating form 50 to 1500Kw when it runn on 400Kw (this was measured on recorder,it measures the both min & max vales) while the actuator voltages are constatnt.Please tell me the cause of load hunting.

Tools for Electricians:
Re: Generator load hunting problem #129059
07/08/04 06:03 AM
07/08/04 06:03 AM
R
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
When 'A' is hunting, are the other two gens compensating by picking up excess load?
How are you accounting for load sharing among the three gens?


Ron
Re: Generator load hunting problem #129060
07/08/04 08:47 AM
07/08/04 08:47 AM
L
luckyali  Offline OP
Junior Member
Joined: Jun 2004
Posts: 7
pakistan
No,two other generator pick up load only when speed drops of any one,there is no variation in speed,i already told that actuator voltage of A are constant.load sharing is controlled by 2301A woodward speed sharing and load control unit.

[This message has been edited by luckyali (edited 07-08-2004).]

Re: Generator load hunting problem #129061
07/08/04 01:47 PM
07/08/04 01:47 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
If you have studied the Woodward instruction book and not resolved the problem, you might contact their technical-support group. From a distance, it is hard to tell whether it is a configuration problem or one internal to the Woodward components.

Re: Generator load hunting problem #129062
07/10/04 04:41 PM
07/10/04 04:41 PM
U
uksparky  Offline
Member
Joined: Jul 2004
Posts: 200
UK
Sounds to me like a synchronising issue - definitely a sharing/control matter. Speed variation in gennys? Hmm. If a diesel set hunts its generally an injection pump governor problem, or the same for petrol but on the carb. However, this would result in cyclic problems and a host of other evils - and dropping like flies of breakers.

Several years ago I got up one morning to find the lights fluctuating from about 50% to full on roughly 2.5cps. The tv didn't like it at all!! [Linked Image] This lasted about ten minutes before we had a 30 second outage then back to normal. A few days later I saw our chief utility troubleshooter in the village and asked him what it was about. His reply was that it was something that theoretically couldn't happen; the ( at that time ) two alternators supplying our region ( we were disconned from the national grid for repairs over the weekend ) had got out of sync with each other; the control system had crashed. I never stopped to work it out, but I guess it is theoretically possible, especially if balancing/motive force is not up to scratch.

Call up the load-box suppliers [Linked Image]


If hindsight were foresight, we'd all be millionaires!

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Theelectrikid
Theelectrikid
Levittown, PA
Posts: 810
Joined: April 2004
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 16
Potseal 15
Popular Topics(Views)
243,592 Are you busy
180,388 Re: Forum
170,861 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.012s Queries: 14 (0.003s) Memory: 0.9672 MB (Peak: 1.1065 MB) Zlib enabled. Server Time: 2018-01-22 10:18:16 UTC