CHUYN CHUYN HH THTHNG ING IU TU TCC

CCcc nnii dung dung chchnhnh trongtrong chuynchuyn NhiNhimm vv vv cccc chchcc nngnng ccaa HH ththngng iiuu ttcc trongtrong NhNh

mmyy ThThyy iinn.. SS nguynnguyn ll chungchung ccaa HH ththngng iiuu ttcc.. QuQu trtrnhnh iiuu chchnhnh TTnn ss vv CngCng susutt ccaa HH ththngng iiuu

ttcc.. CCcc bbcc ThTh nghinghimm khikhi aa HH ththngng iiuu ttcc vvoo llmm vivicc.. CCcc hh hhngng ththngng ggpp trongtrong ququ trtrnhnh vvnn hhnhnh vv ccchch xx

ll.. MM phphngng ququ trtrnhnh llmm vivicc ccaa bb theotheo didi iinn -- ThThyy llcc

vv ququ trtrnhnh iiuu chchnhnh PIDPID

NhiNhimm vv vv cccc chchcc nngnng ccaa HH ththngng iiuu ttcctrongtrong NhNh mmyy ThThyy iinn

1.1. NhiNhimm vv ccaa HH ththngng iiuu ttcc NNuu khngkhng cc iiuu chchnhnh cngcng susutt do do TuabinTuabin phphtt rara thth ddnn

nn ss thaythay ii ttnn ss ccaa llii iinn ququ gigiii hhnn chocho phphpp. . TrongTrong vvnn hhnhnh hh ththngng iinn qui qui nhnh llchch ttnn ss ccaa lliiiinn 0.2%.0.2%.

TTnn ss phph thuthucc vvoo ss vngvng quay quay ccaa RtoRto mmyy phphtt::f=60n/p. f=60n/p.

PhngPhng trtrnhnh cc bbnn chocho ss chuychuynn ngng ccaa rtorto mmyy phphtt::J.dJ.d//dtdt==MqMq--Mc (1)Mc (1)

Mc Mc phph thuthucc chch yyuu vvoo phph ttii ccaa mmyy phphtt iinn PmfPmf.. CnCn MqMq phph thuthucc chch yyuu vvoo cngcng susutt ccaa TuabinTuabin Pt.Pt.

MqMq=Pt/=Pt/==.Q.H/.Q.H/ (2) (2) vvyy Pt=Pt=f(Q,Hf(Q,H,,)) VV vvyy iiuu chchnhnh cngcng susutt TuabinTuabin ththcc chchtt ll iiuu chchnhnh lulu

llngng nncc vvoo TuabinTuabin bbngng ccchch thaythay ii mm ccnhnhhhngng. . NhiNhimm vv ccaa hh ththngng iiuu ttcc ll phphii ccmm nhnhnncc ss thaythay ii nnyy mm bboo mangmang llii mmtt ss cncn bbngngccnn thithitt trongtrong hh ththngng. .

2.2. ChChcc nngnng ccaa HH ththngng iiuu ttcc TT ngng khkhii ngng tt mmyy vv aa tt mmyy nn ttnn ss quay quay

nhnh mmcc . . nn nhnh ttnn ss quay quay khikhi hohott ngng khngkhng ttii vv khikhi cc ttii

ringring, , cc khikhi song song songsong vvii cccc tt mmyy khkhcc. . pp ngng cngcng susutt hhuu cngcng theotheo yuyu ccuu.. HoHott ngng ccaa tt mmyy chch bb ngng bb.. GiGiii hhnn cngcng susutt hhuu cngcng ccaa mmyy phphtt.. iiuu khikhinn tt mmyy ttnhnh trungtrung tmtm cccc chch : : chch nhnhmm, ,

chch bb ngng bb, , chch cngcng susutt, , ddngng mmyy chch bbnhnh ththngng, , ss cc..

TToo cccc ttnn hihiuu thngthng tin tin vv ccnhnh bboo vv cccc hohott ngngccaa bb iiuu chchnhnh ttii chch, , ggii lnln mmyy ttnhnh iiuu khikhinn trungtrungtmtm..

SS nguynnguyn ll chungchung ccaa HH ththngng iiuu ttcc..

IPLC

s

B khuch i cui

Van trt iu khin

Thit b bo v

Servomotor

Cm bin tn hiu ngc

Thit b o tc

u ra nh phnu vo nh phn

Ct ncCng sut

Tn siu khin nhm

Panel iu khiniu tc k thut s

iu khin tay

T iu khin

SS khkhii ccaa HH ththngng iiuu ttcc

BB oo ttcc -- CC nhinhiuu ccchch llyy TTcc tt mmyy phphtt::TT mmyy phphtt ttcc;;TT ccmm bibinn bbnhnh rngrng..

CCm bim bin tn tn hin hiu ngu ngcc

I

PLC

s

B khuch i cui

Van trt iu khin

Thit b bo v

Servomotor

Cm bin tn hiu ngc

B o tc

u ra nh phnu vo nh phn

Cng sutTn s

iu khin nhm

Panel iu khinB iu tc k thut s

T iu khin

iu khin tay

CCmm bibinn TTn hin hiu ngu ngcc Tn hiu ngc t l tuyn tnh dng xc nh v tr

cnh hng Thit b ny c lp t ngay trn servomotor.

Van trVan trt it iu khiu khinn

I

PLC

s

B khuch i cui

Van trt iu khin

Thit b bo v

Servomotor

B o tn hiu ngc

B o tc

Nh phn u raNh phn u vo

Ct ncCng sut

Tn siu khin nhm

Panel iu khiniu tc k thut s

T iu khin

iu khin tay

CCcc loloii van van trtrtt iiuu khikhinn Van Van tt ll::

-- CC khkh nngnng iiuu chchnhnh vv ccpp;;-- iiuu khikhinn con con trtrtt didi chuychuynn ddccngngii tata ss ddngng haihai namnam chmchm iinnbb trtr ii xxngng;;-- NhNh bb ccmm bibinn vv trtr mm vv trtr

con con trtrtt iiuu khikhinn cc chchnhnh xxcc..

Van Van trtrtt iiuu khikhinn

Van servo:Van servo:-- TngTng tt nhnh van van tt ll cc khkh nngnng thaythay ii vv trtr con con trtrtt mmtt ccchch vvccpp vvii nhnhyy caocao;;

-- iiuu khikhinn con con trtrtt ngngii tata ss ddngng mmtt namnam chmchm iinn kktt hhpp vvii hhththngng bmbm dduu cc kktt ccuu ii xxngng..

BB khukhuchch ii uu cucuii

I

PLC

s

B khuch i cui

Van trt iu khin

Thit b bo v

Servomotor

B o tn hiu ngc

B o tc

u ra nh phnu vo nh phn

Ct ncCng sut

Tn siu khin nhm

Panel iu khiniu tc k thut s

iu khin tay

T iu khin

BB khukhuchch ii uu cucuii Tn hiu u vo l tn hiu in 4 - 20 mA. trng thi bnh thng, cng

dng in l 12 mA. Khi c sai lch n cn bng sng + hoc - .

i lng m thc t ch th ca s mn hnh.

Khi tin hnh ci t v khi c s c b khuch i ny c th lm vic ch bng tay bng nt iu chnh.

BB iiuu khikhinn PLCPLC

I

PLC

s

B khuch i cui

Van trt iu khin

Thit b bo v

Servomotor

B o tn hiu ngc

B o tc

u ra nh phnu vo nh phn

Ct ncCng sut

Tn siu khin nhm

Panel iu khiniu tc k thut s

T iu khin

iu khin tay

PLC PLC ccaa hnghng BeckhoffBeckhoff

QuQu trtrnhnh iiuu chchnhnh TTnn ss vv CngCng susutt ccaaHH ththngng iiuu ttcc

1. 1. SS llcc vv ququ trtrnhnh iiuu chchnhnh ttnn ss-- TTnn ss vv iinn pp ll haihai chch tiutiu quanquan trtrngng nhnhtt ccaa chchtt llngng iinnnngnng;;-- KhKhcc vvii iinn pp, , ttnn ss ttii mmii iimm trongtrong hh ththngng uu nhnh nhaunhau vvvivicc iiuu chchnhnh ttnn ss chch cc thth ththcc hihinn ttii cccc nhnh mmyy iinn;;-- MMtt cc trngtrng nnii bbtt vv tt bibitt ccaa tuabintuabin ll nn nhnh ttcc . . NNcc nhnh nghnghaa ll phphnn trmtrm thaythay ii ttnn ss chocho phphnn trmtrm thaythay iicngcng susutt uu rara ccaa tuabintuabin; ;

tt ttnhnh ttnhnh ccaa TuabinTuabin tt ttnhnh ttnhnh phnphn phphii ttii ccaa 2 2 tt mmyy cc kktt nnii llii

-- Speed Droop Speed Droop cc nhnh nghnghaa nhnh sausau::

- V d t my vi gi tr t bp=5% n s phn ng li vi 40% tng cngsut cho vic thay i tn s t 50 xung 49 Hz.

- Khi Bp = 0, ta c t tnh nh v tn s. Lun gi c tn s c nh ngvi mi mc cng sut pht, nn ch dng cho cc t my lm vic trn lic lp.

a.a. iiuu chchnhnh ss ccpp::iiuu chchnhnh ss ccpp ll ququ trtrnhnh tngtng llngng nncc vvoo turbine turbine khikhi ttnn

ss gigimm. . KKtt ththcc ququ trtrnhnh iiuu chchnhnh ss ccpp, , ttnn ss mmyy phphtt vvnnnhnh hnhn ttnn ss quyquy nhnh, do , do llngng cngcng susutt phphtt lnln khngkhng bb hohonntotonn cc giagia tngtng cngcng susutt phph ttii..

b. b. iiuu chchnhnh thth ccpp::QuQu trtrnhnh iiuu chchnhnh thth ccpp ll ququ trtrnhnh tt llii cngcng susutt ccaa tt

mmyy..

NhNh vvyy, , bbngng vivicc iiuu chchnhnh ss ccpp vv thth ccpp, , cngcng susuttphphtt ccaa tt mmyy tngtng lnln pp ngng phph ttii vv vvnn gigi ccttnn ss ban ban uu..

iiuu chchnhnh ss ccpp cc ththcc hihinn tttt cc cccc nhnh mmyy iinn, , cncn iiuu khikhinn thth ccpp chch cc mmtt ss nhnh mmyy. . iiuu khikhinn ththccpp cc thth ththcc hihinn bbngng taytay hay hay tt ngng..

c.c. QuQu trtrnhnh iiuu chchnhnh ttnn ss theotheo phph ttii

2.2. Qui Qui lulutt iiuu chchnhnh ttnn ss

a. a. pp ngng ccaa bb iiuu chchnhnh PID PID trongtrong ququ trtrnhnh khkhii ngng

b.b. iiuu chchnhnh ttnn ss chch ththcc hihinn khikhi tt mmyy chchyy chch khngkhng ttii vv khikhi llmm vivicc chch ttnn ss. . TrongTrong ququ trtrnhnh iiuuchchnhnh cngcng susutt bb PID PID cc cctt ii

3.3. Qui Qui lulutt iiuu chchnhnh ttnn ss

CCcc bbcc ThTh nghinghimm khikhi aa HH ththngng iiuu ttcc vvoollmm vivicc

iiuu kikinn ccnn thithitt thth nghinghimm HH ththngng iiuu ttcc ll HH ththngnguu pp llcc hohonn tttt vv chocho phphpp aa vvoo hohott ngng

1.1. ThTh nghinghimm TT mmyy chch bubungng xoxonn khkh::-- KiKimm tratra hh ththngng ngungunn ccpp iinn;;-- KiKimm tratra cccc cc ccuu iiuu khikhinn ThuThu llcc;;-- ChChnhnh nhnh vv thth nghinghimm hh ththngng gigimm sstt iinn ththyy llcc;;-- ChChnhnh nhnh vv kikimm tratra cccc ngngngng ttcc ngng ccaa TTnn hihiuu ttcc vv mm;;-- ThThcc hihinn mm phphngng cccc chch llmm vivicc ccaa TT mmyy..yy ll cngcng vivicc thth nghinghimm quanquan trtrngng vv nn quyquytt nhnh chochovivicc aa HH ththngng iiuu ttcc vvoo llmm vivicc..

2.2. ThTh nghinghimm TT mmyy khikhi bubungng xoxonn khkh cc nncc::-- KiKimm tratra hohott ngng ccaa bb iiuu ttcc khikhi khkhii ngng bbngng taytay chch khkhngng ttii::+ + KiKimm tratra vv hihiuu chchnhnh cccc llii cccc logic logic trongtrong phphnn mmmm;;+ + KiKimm tratra vv hihiuu chchnhnh ss llmm vivicc ccaa bb gigiii hhnn mm;;

-- KiKimm tratra hohott ngng ccaa bb iiuu ttcc khikhi khkhii ngng tt ng ng chch khkhngng ttii::+ + KiKimm tratra cccc thngthng ss trongtrong chngchng trtrnhnh;;++KiKimm tratra ss phphnn ngng ccaa mmchch vngvng iiuu chchnhnh PID.PID.+ + KiKimm tratra vv hihiuu chchnhnh ss llmm vivicc ccaa bb gigiii hhnn mm;;-- ThTh nghinghimm llmm vivicc khikhi nnii llii::++KiKimm tratra hohott ngng ccaa bb iiuu ttcc chch PowerPower ;;++KiKimm tratra hohott ngng ccaa bb iiuu ttcc chch GroupGroup;;++KiKimm tratra hohott ngng ccaa bb iiuu chchnhnh chch SS..CC..;;-- KiKimm tratra hohott ngng ccaa bb iiuu ttcc chch sasa ththii phph ttii

yy ll bbcc thth nghinghimm cucuii ccngng quyquytt nhnh aa hh ththngng iiuu ttccvvoo llmm vivicc llnn uu tintin hay hay sausau khikhi aiai tutu..

CCcc hh hhngng ththngng ggpp trongtrong ququ trtrnhnh vvnn hhnhnh vvccchch xx ll

KhngKhng xuxutt hihinn ttnn hihiuu Ready for startReady for start::-- CC ccuu KhKhii ngng--DDngng (SSU) (SSU) bb kktt;;-- pp llcc dduu trongtrong tt iiuu ttcc cc gigimm ththpp;;-- KhngKhng cc hh hhngng trongtrong bb iiuu chchnhnh;;-- ChChtt ccnhnh hhngng khngkhng bb tt;;-- ChaCha ththoo chchtt vvnhnh iiuu chchnhnh hohocc khngkhng cc ttnn hihiuu bboo chchtt vvnhnhiiuu chchnhnh vv trtr tt do;do;-- KhngKhng cc llnhnh ddngng..

MMtt ttnn hihiuu phphnn hhii cngcng susutt::-- KiKimm tratra RleRle bboo ttnn hihiuu phphnn hhii cngcng susutt uu rara;;-- KiKimm tratra ttnn hihiuu cngcng susutt phphnn hhii uu vvoo TT iiuu ttcc;;-- KiKimm tratra cccc modulmodul uu vvoo bnbn trongtrong tt..

CC llnhnh khkhii ngng nn tt iiuu ttcc nhngnhng tt mmyy khngkhng hohott ngng::-- KiKimm tratra cc llnhnh nn cc ccuu SSU hay SSU hay chacha;;-- KiKimm tratra llnhnh mm ccnhnh hhngng aa nn bb theotheo didi iinn -- ThuThu llcchay hay chacha..-- KiKimm tratra logic logic llmm vivicc bnbn trongtrong chngchng trtrnhnh

CC llnhnh khkhii ngng ccnhnh hhngng mm > 50%:> 50%:-- CC llii bnbn trongtrong bb vi vi xx ll;;-- KiKimm tratra llii logic logic llmm vivicc bnbn trongtrong chngchng trtrnhnh

TTcc tt nn ttcc kkchch tt nhngnhng khngkhng cc llnhnh uu rara hohocc ttcc tt nn ttcc phanhphanh nhngnhng khngkhng cc llnhnh uu rara..-- KiKimm tratra cccc ccmm bibinn ttcc llmm vivicc tttt;;-- KiKimm tratra llii cccc ngngngng tt ttcc ccaa rlerle uu rara;;-- KiKimm tratra cccc uu rara ccaa BB vi vi xx ll..

MM phphngng ququ trtrnhnh llmm vivicc ccaa bb theotheo didiiinn -- ThThyy llcc vv ququ trtrnhnh iiuu chchnhnh PIDPID

1.1. SS hhmm truytruynn ccaa BB theotheo didi iinn -- ThThyy llcc

2.2. SS mm phphngng bbngng MatlabMatlab

3.3. MM phphngng ququ trtrnhnh iiuu chchnhnh PIDPID-- BB iiuu chchnhnh PID PID ll ss kktt hhpp ccaa hhnhnh ngng iiuu khikhinn ll: : tt ll (Proportional), (Proportional), ttchch phnphn (Integral) (Integral) vv vi vi phnphn (Derivative).(Derivative).++BB iiuu chchnhnh tt ll (P) (P) ll bb iiuu chchnhnh mm trongtrong ss thaythay ii ccaa iillngng uu rara ttcc ngng lnln ii ttngng iiuu chchnhnh tt ll vvii ss thaythay ii ccaaii llngng uu vvoo. . ++BB iiuu chchnhnh ttchch phnphn (I) (I) ll bb iiuu chchnhnh mm trongtrong ss thaythay iiccaa ii llngng uu rara ttcc ngng lnln ii ttngng iiuu chchnhnh, , tt ll thuthunn vvii ssthaythay ii ccaa ii llngng uu vvoo ccngng nhnh ttchch phnphn theotheo ththii giangian ccaa ssthaythay ii ii llngng uu vvoo. . iiuu khikhinn I I cc khkh nngnng aa ss daodao ngngtrtr vv vv trtr ban ban uu nhngnhng khkh nngnng phphnn ngng chchmm vvii cccc saisai llchch llnn. . NN ththngng kktt vvii cccc hhnhnh ngng iiuu khikhinn khkhcc..+ + iiuu khikhinn D D cungcung ccpp mmtt phphpp llyy vi vi phnphn mm uu rara quanquan hh trtrcctitipp ttii ttcc thaythay ii ccaa uu vvoo. . HHngng ss vi vi phnphn cc bibiuu didinn vviinn vv ll Seconds Seconds vv nhnh nghnghaa uu rara iiuu khikhinn vi vi phnphn. . NN ththngng kkttvvii cccc hhnhnh ngng iiuu khikhinn khkhcc..

VVyy bb iiuu chchnhnh PID PID ll ss thaythay ii ccaa ii llngng uu rara ttccngng lnln ii ttngng iiuu chchnhnh tt ll vvii ss thaythay ii ccaa ii llngnguu vvoo, , ttcc thaythay ii ccaa nn vv ttchch phnphn theotheo ththii giangian ccaa ssthaythay ii ii llngng uu vvoo..

CHUYN H THNG IU TCCc ni dung chnh trong chuyn Nhim v v cc chc nng ca H thng iu tc trong Nh my Thy inS nguyn l chung ca H thng iu tc.B o tc Cam bin tin hiu ngcCm bin Tin hiu ngcVan trt iu khinCc loi van trt iu khinVan trt iu khinB khuch i u cuiB khuch i u cuiB iu khin PLCQu trnh iu chnh Tn s v Cng sut ca H thng iu tc2. Qui lut iu chnh tn s3. Qui lut iu chnh tn sCc bc Th nghim khi a H thng iu tc vo lm vicCc h hng thng gp trong qu trnh vn hnh v cch x lM phng qu trnh lm vic ca b theo di in - Thy lc v qu trnh iu chnh PID2. S m phng bng Matlab3. M phng qu trnh iu chnh PID