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Anonymous Poster #1

Governor Alternate (Change) From Auto to Manual

02/10/2012 4:02 AM

We are running machine (Hydo Power Plant 2 machine @34MW=64MW with separate Governor during starting it seems Governor alternate from auto to manual...and when u put Low Load let say below 30MW, machine Load apper to drop or flactuate from low to high then suddenly trip by overspeed alarm. but when Load is above 30MW no probs happen..but were getting trouble bcos its not all the time we have prently of water so were always suppose to shunt down one unit.Could someone suggest technical reasons why this happen???Is there need to change this new Governor (Installed 2005)???

NB:While ENGLISH ELECTRIC TYPE (ANOTHER PLANT INSTALLED IN T OTHER PART OF THE SAME RIVER AS NO PROBLEMS SINCE 1964)
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: GOVERNOR ALTERNATE(CHANGE) FROM AUTO TO MANUAL

02/10/2012 4:27 AM

What does the original equipment manufacturer's local technical specialist have to say on the subject?

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leveles
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Join Date: Jan 2008
Posts: 1753
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#2

Re: Governor Alternate (Change) From Auto to Manual

02/11/2012 12:28 AM

Resistive loads, inductive loads, what phase relationship?
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Wal
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#3

Re: Governor Alternate (Change) From Auto to Manual

02/11/2012 2:35 AM

Have you checked the log books prior to 2005 to see how the old governor behaved? What was changed and how things behaved after the change may give you an angle to explore.

Maybe this "new" governor was never properly commissioned.

Which river is this on?

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Mukesh0861
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#4

Re: Governor Alternate (Change) From Auto to Manual

02/15/2012 4:29 AM

The problem seems to related with linkage setting or the gate limit setting or friction some where in the governing system or wicked gate etc. Many times , after governor overhaul this type of problem is faced and usually is set right by governor man through linkage adjustment.
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leveles (1); Mukesh0861 (1); PWSlack (1); Wal (1)

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