Free Governor

7/24/2019 Free Governor

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FREE GOVERNOR MODE OF

OPERATION

(FGMO)

FOR

STEAM TURBINES

Presented By:K B Batra

C&I Engineering


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ORGANISATION OF PRESENTATION

What is FGMO ?

IEGC guidei!es

Fa"iities a#aia$e i! %WU desig! sets &' BE

P*&$e+s i! i+,e+e!tati&! &' FGMO

M&di'i"ati&!s "a**ied i! "&!t*& s"he+e

C&!"usi&!


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FREE GOVERNOR MODE OPERATION

(FGMO)

It +ea!s that the ge*!&* is '*ee t& ge*! as ,e*

its *eguati&!-d*&&, "ha*a"te*isti"s

The*e a*e !& "&!st*ai!ts i+,&sed &! it i.e

/ Va#e .e,t 0ide &,e!

/ '*e1ue!"2 i!'ue!"e s0it"hed &''

/ dead $a!d '&* '*e1ue!"2 i!'ue!"e

/ dei$*ate ti+e dea2s


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OB3ECTIVE OF FREE GOVERNOR MODE OF

OPERATION

T& a**est t*a!sie!t s0i!gs i! g*id '*e1ue!"2

T& +ai!tai! !ati&!a g*id '*e1ue!"2 0ithi! IEGC

$a!d &' 45 t& 6786 9

F*ee ge*!&* &,e*ati&! a&0s the +a"hi!e t& &ad

&* u!&ad de,e!di!g u,&! 0hethe* '*e1ue!"2 is

&0e* tha! &* +&*e tha! the *e'e*e!"e '*e1ue!"2

Va*iati&! i! g*id '*e1ue!"2 "a! $e +i!i+i9ed $2

,utti!g a the ge!e*ati!g stati&!s &! :'*ee

ge*!&*; +&de &' &,e*ati&!


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STEAD< STATE SPEED REGUATION

(DROOP)IT IS TE CANGE IN STEAD< STATE SPEED

E=PRESSED IN > OF RATED SPEED

WHEN

TE OUTPUT OF TE TURBINE IS GRADUA8

&ad "ha!ge is t& $e sustai!ed '&* a,,*&8 6

+i!utes8 I' '*e1ue!"2 #a*ies du*i!g this ,e*i&d

"&**e"ti#e a"ti&! t& $e ta.e! agai!

Co"/,


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OB3ECTIVES

&ad sha $e $*&ught $a". t& the set,&i!t i! a

*a+,ed 'ashi&! a'te* 'i#e +i!utes

F&* '*e1ue!"2 L 4587 a!d 6786 9 &ad "ha!ge t&

$e as ,e* d*&&, "ha*a"te*isti"s a!d i+ited t& K-/

7>


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MODIFIED SCEME

Fi*st s"he+e de#e&,ed $2 BE a!d tested atSi+had*i si+uat&* at C&*,&*ate RD &!

-7-774

Ste, a!d *a+, "ha!ge i! &ad 0e*e si+uated

Pa*a+ete* #a*iati&!s 0e*e 0ithi! a&0a$e i+its

It +et the set &$e"ti#es8 &0e#e* "e*tai! "ha!ges

0e*e suggested

Resuts 0e*e ,*ese!ted t& NTPC- CEA- PGCI et"8 I!4th a!d 6th "&++ittee +eeti!gs8 6th +eet 0as hed at

a*d0a*

It 0as suggested $2 Chai*+a! that the s"he+e $e

tested at Si+had*i site $2 BE NTPC


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F&ati!g F*e1ue!"2 Set,&i!t

a>t

re?

)de@


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TSEINFUENCE OADGRADIENTFREJUENC

(45/6786)

TO CC

F/ACT

L45-6786

FREF45- 6786

F

K

/

K7>TO CC

CC CBSI/ C/-L

BOC% DIAGRAM CONTRO SCEME


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BOC% DIAGRAM / CONTRO SCEME


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SUMMARY OF TEST RESULTS


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SUMMARY OF TEST RESULTS

RE1ISEDRE1ISED

FGMOFGMO

SC'EMESC'EME

* Appro 45 3o+,#$#3e&" + ,+$ orSR re!e"#$

* .5 De6 C7+r&+/&o"

MSTEMP

* * .0 De6C

7+r&+/&o"

'RTEMP * Ne+r&"6 A3+r

1+3!e

R' METALTEMPS

T'ROTT

LEPRESSU

RE

* 5 96#7+r&+/&o"

LOAD

T!r;&"e e/+3 /eper+/!re


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CONCUSION

M&di'ied s"he+e has $ee! a""e,ted $2 CEA a!dNTPC

Fi!a *e,&*t &' the "&++ittee has $ee! *eeased

di*e"ti!g utiities t& i+,e+e!t FGMO

S"he+e t& $e i+,e+e!ted $2 utiities '&* %WU

desig! sets

Utiities ha#e t& ,a"e &*de* &! BE '&* this 0&*.

As &' !&0 M@ desig! sets t& $e ,ut i! FGMO

(0ith&ut a!2 +&di'i"ati&!) a!d "&!t*&ed +a!ua2


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B*&ad 'eatu*es &' S"he+e i+,e+e!ted at Nasi.

A The s"he+e 0ith '&&0i!g $asi" 'eatu*es 0as

i+,e+e!ted i! u!it 4 (7 MW M@ +-") at Nasi. Load and rDine inet Pr >Fanges GitF ?reHen>y

@ariation7

Pressre >orre>tion tFrogF pse >o!!and to speedergear !otor to restore oad GFen rate o? pressre @ariationis !ore tFan 072 Ks>!'!in

Pressre >orre>tion tFrogF >ontinos >o!!and GFenpressre @ariation is !ore tFan 2 Ks>!

/o >Fanges in ?e ?iring7

A A tea+ ed $2 Me+$e* CERC #isited Nasi. a!d 0assatis'ied 0ith the *es,&!se &' the s"he+e


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MS! )r! + ,SET )./T (

S

S)EEE2 E2

2.SE #MM/

" SE#!

)2! 2M) + 0!1 6#S! in 30 SE#

MS! )r! + ,SET )./T -

L) ./ 7T

2

T'IS RELATES TO T'E CASE OF FRE@UENCY RISE

L) ./ 7T

SCEME IMPEMENTED IN NASI% (MSEB)


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SCEME IMPEMENTED IN NASI% (MSEB)


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EFFECT OF OFF FREJUENC< OPERATION

O re!e"#$ oper+/&o" e+/ ++$ /


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FREJUENC< #s UI PRICE

0

28

#6

84

112

140

168

1

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