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Anonymous Poster #1

Turbine Governor Servomotor Problem

07/01/2013 12:56 AM

Hi,

I am facing a problem that there is sudden decrease in load when the hydrogenerator is working in more than half of load. The generation decreased from 4.1 MW to 300 kW in almost no time. Discharge is okay. What could be problem? We tried to fix it by running it in manual position and checking the servomotor displacement. We found it satistactory. What could be the cause?
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lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Turbine Governor Servomotor Problem.

07/01/2013 2:08 AM

More than likely a lack of knowledge on the part of the operators.

Have you contacted a factory service tech?

What have you tried so far?

Any trouble shooting?
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SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#2

Re: Turbine Governor Servomotor Problem.

07/01/2013 2:31 AM

Does it happen every time?? How many times has it happened?? Are there any new generator facilities coming on-line in the area?? Does it happen at a specific time?? Does it happen at exactly 4.1 MW every time??

__________________
 All living things seek to control their own destiny....this is the purpose of life
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dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#3

Re: Turbine Governor Servomotor Problem.

07/01/2013 4:45 AM

Dear Friend,

It appears that the regulating valve seating has got dislodged from its position and blocking the flow. This is obvious when you have mentioned ".........and checking the servomotor displacement, We found it satistactory."

The movement/displacement of Servo Motor, does NOT reflect in the Flow Control/Regulation.

Pl. check this and post - how it was solved.

DHAYANANDHAN.S
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sauravbabu
Power-User
Engineering Fields - Electrical Engineering - New Member

Join Date: Dec 2009
Posts: 247
#4
In reply to #3

Re: Turbine Governor Servomotor Problem.

07/04/2013 2:22 AM

i have thought of this as a very effective place for solving problems. The problem was with linear displacement transducer. Repalcing it solved the problem.

Thx.
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arcflash
Member
India - Member - New Member

Join Date: Jan 2008
Posts: 7
#5

Re: Turbine Governor Servomotor Problem

08/03/2013 12:07 AM

It can be due to multiple reasons. However probability of the following two is high.

1) If the machine has electro-hydraulic governor, some governor card might misbehave.

2) Droop setting is disturbed.
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Users who posted comments:

arcflash (1); dhayanandhan (1); lyn (1); sauravbabu (1); SolarEagle (1)

Previous in Forum: Tips to Convert a Universal Motor to a DC Generator   Next in Forum: Parallel Transformers

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