internship report trung v1

8/12/2019 Internship Report Trung V1

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HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY

SCHOOL OF ELECTRICAL ENGINEERING

***************************************

INTERNSHIP REPORT

Cua Dat Hydropower Pla

Supervisor ! N"uy# $%& Huy' P(DStudent ! N"uy# Tru"

Hao) +,-./


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Pre0a&e ad a&1owled"e2etF)d)" wor1 &a 3e a real &(alle"e' e4pe&)ally )0 we do5t (a6e ay

e7per)e&e8 Yet to "et e7per)e&e we 2u4t 0)r4t 0)d a 9o38 It54 a a4ty &at&( t(at &a3e d)00)&ult to "et aroud 3ut a )ter4()p )4 a "ood way to do )t8 T(ere0ore' t()4

)ter4()p pro6)de4 2e t(e opportu)ty to "a) (ad4 o wor1 e7per)e&e t(at I 9u4t

&a:t "et ) t(e &la44roo28 ;oreo6er' t()4 )ter4()p &a 3e 4ee a4 t(e p)a&le o0

2y uder"raduate edu&at)o ad ")6e 2e t(e &(a&e to u4e t(e 41)ll4 I56e leared )

t(e &la44roo2 ) a real+world 4ett)"8 It:4 a &(a&e to pro6e t(e wort( o0 2y

e would

l)1e to e7ted 2y 4)&ere t(a14 to all o0 t(e28

I a2 ()"(ly )de3ted to Cua Dat Hydro Power Plat 0or t(e)r "u)da&e ad

&o4tat 4uper6)4)o a4 well a4 0or pro6)d)" e&e44ary )0or2at)o re"ard)" t(e

report ? al4o 0or t(e)r 4upport ) &o2plet)" t(e report8


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CONTENTList of figure..................................................................................................................................... 4

List of tables.................................................................................................................................... 5

Chapter 1. Introduction of Cua Dat hydropower plan...................................................................6

I.General information about Cua Dat irrigation and hydroelectric project .....................................61.Irrigation project..................................................................................................................... 62.Hydroelectric project..............................................................................................................73.Function of Project:................................................................................................................7

II.Power plan parameters............................................................................................................111.Generator parameters..........................................................................................................112.ransformer parameters.......................................................................................................11

Chapter 2.Epert infor!ation.......................................................................................................1"

I.Major lectric Connection Diagram of the plan.........................................................................1!1.Generator !H1" H2#..............................................................................................................1$2.ransformer !1% 2#............................................................................................................1$3.&u'iliary transformer !()1%()2#......................................................................................1*$.Pole circuit +rea,er !)-1% )-2#............................................................................................ 1**.Fuse !)$11% )$22#.............................................................................................................1*6./art0ing disconnetor at 13", !)-1-* % )-2-*#...............................................................167.ransformer at 13", side !)H1&% )H2& % )H14% )H24#.................................16.5urrent transformer of 13", side !I)H1" I)H2#.............................................................16).oltage transformer at neutral of generator!H1-% H2-#...............................................171-.ale type lig0ting arrester 13., !55)1 % 55)2#.......................................................1711.5apacitor of 13., side....................................................................................................1712.5ircuit +rea,er 11-, !171% 172% 173% 17$#.......................................................................17

13.(isconnected at 11-,......................................................................................................11$.ransformer of 11-, side.................................................................................................11*.5urrent transformer of 11-, side.....................................................................................1)16.ale type lig0ting arrester 11-,:.....................................................................................1)

II.Protection for transformer and generator.................................................................................1"1.0e protection for generator.................................................................................................1)2.0e protection for transformer..............................................................................................2$

III.#perational process................................................................................................................ $%1.tart unit diagram................................................................................................................. 22.top unit diagram.................................................................................................................3-

I&.'lac( )tart procedure.............................................................................................................!$

1.80at is +lac, start:...............................................................................................................322.Function and re9uirement of +lac, start plan.......................................................................323.4lac, start se9uence............................................................................................................33

Chapter ".Eperience gained during the internship..................................................................."4

#eference....................................................................................................................................... "5


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List of figure

$igure 1% &a'or electric connection diagra! of the plan...........................................................1"

$igure 2% (wo stages of loss of ecitation relay.........................................................................22

$igure "% )tart *nit Diagra!.........................................................................................................2+

$igure 4% )tart unit diagra!,-loc/..............................................................................................20

$igure 5% )top *nit Diagra!........................................................................................................."

$igure 6% )top unit diagra!,-loc/.............................................................................................."1


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List of tables

(able 1% &ain ara!eters................................................................................................................+

(able 2% 3enerator para!eters.....................................................................................................11

(able "% (ransfor!er para!eters.................................................................................................11

(able 4% 3enerator......................................................................................................................... 14

(able 5% (ransfor!er..................................................................................................................... 14

(able 6% uiliary (ransfor!er.....................................................................................................15

(able % ole Circuit -reaer........................................................................................................15

(able +% $use.................................................................................................................................. 15

(able 0% Earthing disconnector....................................................................................................16

(able 1% (ransfor!er...................................................................................................................16

(able 11% Current (ransfor!er......................................................................................................16

(able 12% oltage (ransfor! at 7eutral of 3enerator.................................................................1

(able 1"% al8e (ype Lighting rrester........................................................................................1

(able 14% Capacitor........................................................................................................................ 1

(able 15% Circuit breaer............................................................................................................... 1

(able 16% Disconnected................................................................................................................. 1+

(able 1% (ransfor!er...................................................................................................................1+

(able 1+% Current (ransfor!er......................................................................................................10

(able 10% al8e type Lighting rrester 11..............................................................................10


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Chapter 1. Introdution of Cua !at h"dropo#er plan

I. $eneral infor%ation about Cua !at irrigation and h"droeletri

pro&et

Cua Dat pro9e&t &o4)4t4 o0 , part4! Irr)"at)o pro9e&t ad (ydroele&tr)& pro9e&t

1. Irrigation pro&et

Owed 3y ;))4try o0 A"r)&ulture ad Rural De6elop2et' operated C(u R)6er

>ater re4our&e4 oe 2e23er Co2pay l)2)ted8

T(e pro9e&t )&lude4!

Pr)&)pal Da2 )4 &o&rete+0a&e ad ro&1+0)ll Da2@

Sp)llway relea4e4 0lood4@

D& CBy A&&e44ory Da2 ad H Ca A&&e44ory Da28

;a) 0u&t)o o0 )rr)"at)o pro9e&t!

Pro6)de 4ta3le water re4our&e 0or 8, (a 0ar2lad8

Redu&e 0lood4 w)t( 0re


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water le6el at u J(B( )4 K.'.2 Mre&ord o0 ()4tory 0lood ) .,8

Pro6)de water 0or )du4try ad l)0e w)t( 0low rate '. 2Q4@

Supple2et water ) dry 4ea4o to &lea out al1al)e ad )2pro6e e6)ro2et

w)t( 0low rate -' /, 2Q48'. H"droeletri pro&et

Owed ad operated 3y V)a&oe7 P?C 9o)ed 4to&1 &o2pay8

It )&lude4!

Sur"e &(a23er@

Pe4to&14

Power(ou4e ad lea6e dra) D)4tr)3uted 4tat)o ad ..-JV tra42)44)o l)e 8

(. )untion of Pro&et*

Ta1e 0ull ad6ata"e o0 water w()&( )4 pro6)ded 0or )rr)"at)o pro9e&t to "eerate

ele&tr)&)ty8 T(e a2out o0 water 0or "eerat)" ele&tr)&)ty deped o t(e water 0ro2

)rr)"at)o pro9e&t8

a. Loation*

Ca $t )rr)"at)o ad (ydroele&tr)& pro9e&t )4 lo&ated o C(u dr)6e' )4 4)tuated )

Va ua Co22ue' T(uo" ua D)4tr)&t' T(a( Hoa Pro6)&e8 12 0ro2

T(a( Hoa &)ty8


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b. +ain para%eters of pro&et

Table 1* +ain Para%eters


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No Para%eter ,nit -alue

1 H"drograph"

Valley area 12, 8

A6era"e 0low rate 2Q4 8-De4)"ed 0lood pea1 0low rate P

-'.2Q4 .8,--

C(e&1)" 0lood pea1 0low rate P

-'-.2Q4 .8--

' !a%

Nor2al water le6el 4ur0a&e

ele6at)o2 ..-'-

Dead water le6el ele6at)o 2 '-

De4)"ed water le6el ele6at)o

0lood2 ..'-

C(e&1)" 0lood water le6el

ele6at)o 2 .,.'

Total 4tora"e &apa&)ty .-2 .8/-

U4e0ul &apa&)ty .-2 '( ater level resisting flood in '/1'

Alert I 2 K '--

Alert II 2 K.-,'-Alert III 2 K.-'--

Spe&)al Alert 2 K .-'--0 Spill#a"

Type o0 Sp)llwayO0)7erop Re)0or&e

&o&reteType o0 d)4&(ar"e Fa&e d)4&(ar")"

;a7)2u2 d)4&(ar"e 0low rate '

P-'-.2Q4..8/

Cre4t ele6at)o 2 .,,'

Cre4t o0 0a&e d)4&(ar")" 2 K '-Rad)al "ate "ate -

Rad)al "ate w)dt( Mw)de 7 ()"( M2 7 2 M..7.+ Type o0 rad)al "ate ope+&lo4e Hydraul)& &yl)der

Priniple !a%

De4)"ed le6el Le6el I

Type&o&rete+0a&e ad ro&1+

0)ll

Top o0 Da2 ele6at)o ; .,.'Le"t( o0 t(e top 2 .-->)dt( o0 t(e top 2 .-'-

;a7)2u2 ()"( 2 ..'

>a6e "uard)" wall ele6at)o 2 .,,'2 H dro o#er lan


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. Hu%an resoure situation*

o Total! people' ) t(ere!

Operat)oal wor14(op! / people

Ele&tr)&al+auto2at)o wor14(op! . people

;e&(a)&al+(ydraul)& wor14(op! .- people

;aa"e2et 4e&t)o ad )d)re&t+e2ployee4! , people

+ -. d)re&tor

+ -,

+ -. deputy d)re&tor

+ -. Ad2))4trat)6e 2aa"er+ -. 2ar1et)" e2ployee

+ -. 0)l)" &ler14

+ - dr)6e4

+ - a44)4ta&e e2ployee4

+ - &oo14

+ - prote&tor4


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II. Po#er plan para%eters

Cua Dat (ydropower pla (a4 de4)"ed &apa&)ty o0 ;> ad , "eerator4'/8

;> ea&(' Geerat)o 6olta"e .'JV )4 a2pl)0)ed 3y -, tra40or2er .8Q..-JV'

0ro2 tra40or2er to ..- JV d)4tr)3ut)o 4tat)o ad &oe&t to at)oal power "r)dat a C(e 4tat)o ;W& So 4tat)o' T(a( Hoa pro6)&e8

1. $enerator para%eters

Table '* $enerator para%eters

+ ;au0a&turer DFE;+ Type T(ree p(a4e4 4y&(roou4+ Rated power /8 ;>

+ Co4 -8+ E00)&)e&y 8/+ I4ulat)o le6el F+ Rated 6olta"e .8 1V+ Rated &urret o0 4tator ,8, A+ Coe&t)o o0 4tator w)d)" Star + Rated 4peed ,./8 RP;+ Ca"e 4peed /, RP;+ Rotat)" d)re&t)o Couter &lo&1w)4e

+ Rated 0re


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H)"( 6olta"e w)d)" 6olta"e .. JVLow 6olta"e w)d)" 6olta"e .8 JVH)"( 6olta"e w)d)" &urret .8 ALow 6olta"e w)d)" &urret ,8 AI4ulat)o le6el FCool)" type ONANQONAFCoe&t)o Yd..No load lo44 Jw

Load lo44 Mt -C , Jw

S(ort &)r&u)t )du&ta&e Mt -C .,

Rated 0re


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Chapter '. E3pert infor%ation

I. +a&or Eletri Connetion !iagra% of the plan

S4 56 N7i 5i8n Ch9nh Nh: +;"Th8 Geerat)" 6olta"e o0 t(e plat )4

4ele&ted a4 .8 1V' )4 &oe&ted to , 4tep up tra40or2er4 MT.' T, + ;VA+

.8Q..-1V 3y , pole &)r&u)t 3rea1er4 M-.' -,8

;a9or au7)l)ary 4our&e o0 t(e pla )4 ta1e 0ro2 "eerator pole 3u4 3ar MC.'

C, t(rou"( , tra40or2er4 MTD.' TD, .8Q-'/1V+.---1VA8 Two 3a&1 up

4our&e4! Oe )4 ta1e 0ro2 lo&al "r)d t(rou"( tra40or2er TD.+/--JVA+

Q-8/1V' oe )4 ta1e 0or2 D)e4el "eerator JVAQ,-V8

..-1V d)4tr)3ut)o 4tat)o &o4)4t4 o0 , 3u4 3ar4 MC..' C., )4 &oe&ted ea&(


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ot(er t(rou"( / ..-1V &)r&u)t 3rea1er4 M..'..'.'./8 u4 3ar C.. 0eed

ele&tr)&)ty to ..- 1V tra42)44)o l)e ME8, to ,,- 1V a C(e 4tat)o8 u4 3ar

C.. 0eed ele&tr)&)ty to ..-1V tra42)44)o l)e ME8 to ..- 1V ;u& So

4tat)o81. $enerator ?H1@ H'A

Table 0* $enerator

. Type o0 de4)" Su4pe4)o, Na2e SF/'+,Q-- Rated power /' ;>/ Rated 6olta"e .' 1V Rated 4tator &urret ,8, A

Rated e7&)t)" &urret -- A Power 0a&tor &o4Z -' E00)&)e&y ' Rated 0re


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(. u3iliar" transfor%er ?T!D1BT!D'A

Table 2* u3iliar" Transfor%er

. De4)"ed type [D\[+.

, I4ulat)o type Dry Rated pr)2ary 6olta"e .' 1V/ Rated 4e&odary 6olta"e -'/ 1V Rated 0re


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Operat)oal 2e&(a)42a8 Type ;otor 38 Rated 6olta"e o0 2otor /--Q,- V

Nu23er o0 au7)l)ary &ota&tor

a8 Nor2al ope)" 38 Nor2al &lo4)" Sel0+ut)l)=)" 4our&e

a8 DC 6olta"e ,,- VDC38 AC 6olta"e ,,- VAC

2. Earthing disonnetor at 1(@- ?D/1/ B D/'/A

Table D* Earthing disonnetor

. Rated 6olta"e .8 1V, ;a7)2u2 6olta"e .8 1V Rated 0re


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Rated 0re


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Rated 0re

. Rated 6olta"e o0 2otor ,- VDC./ Rated &urret o0 2otor /' A

. Operat)oal 2e&(a)42 Spr)"

1(. !isonneted at 11/-

Table 12* !isonneted

. Rated 6olta"e ..- 1V

, ;a7)2u2 6olta"e ., 1V Rated &urret .,- A/ -H= 0re


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1. Current transfor%er of 11/- side

Table 1* Current Transfor%er

. Rated 6olta"e .. 1V

, Rated &urret ., A Rated 0re


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Sour&e! ,,-DC

;a7)2u2 power &o4u2)"! ->

Stora"e te2perature! +/--C to --C

Operat)oal te2perature! +,--C to -C ) (our48

Hu2)d)ty! up to

1.1. $enerator urrent differential protetion ?F$A

U4)" to prote&t t(e "eerator 0ro2 t(ree p(a4e 0ault ) 4tator w)d)" ad

output8 T()4 )4 2a) prote&t)o o0 "eerator ad oly operat)" w)t( )teral

0ault48

P)&1 up 6alue I -8. A pr)2ary 4)de or I ,-A 4e&odary 4)de8 Prote&t)o =oe! Fro2 &urret tra40or2er G.+TA/ MG,+TA/ lo&ated at

output o0 eutral po)t to &urret tra40or2er G.+TA.. MG,+TA.. lo&ated at

output o0 "eerator

Curret &)r&u)t &oe&ted 0ro2 .+ to .+.- output o0 "eerator ad .+.

.+/ output o0 eutral po)t8

T(e prote&t)o operate4 w)t(out t)2e delay to a&t)6e pole &)r&u)t 3rea1er -.'

d)e &utt)" "eerator' 4ed)" prote&t)6e 4)"al . ad prote&t)6e 4)"al , to

LCU 3oard' &utt)" ;C..M.' &utt)" ;C.,M./ ad /.M/,8

>(e prote&t)o a&t)6e 8LED, MGe d)00 OP at relay G- tur o' LED.

MGe d)00 OP T\[\+. tur o' at t(e 4a2e t)2e t(e "eerator d)00eret)al

tr)pp)" 4)"al 4et to LCU 3oard8

1.'. $enerator under freJuen" protetion

U4)" to prote&t "eerator4 w(e t(e 0re


21/35

4)"al' )4tead 4et 4)"al to LCU 3oard8

1.(. ,nder voltage protetion

P)&1 up 6alue U -Ud2w)t( delayed t)2e t .8 4e&od

>(e relay a&t)6e LED, MGe uder 6olta"e Op at relay G- tur o'

LED MGe uder 6olta"e Op T\[\+. tur o' at t(e 4a2e t)2e 4et

4)"al to uder 6olta"e prote&t)o LCU &a3)et 0or tr)pp)"8

1.0. Over voltage protetion.

P)&1 up 6alue U .-Ud2t)2e delay t .848

T(e prote&t)o operate4 t)2e delay t.84 to a&t)6e pole &)r&u)t 3rea1er-.' d)e &utt)" "eerator' 4ed)" prote&t)6e 4)"al . to LCU 3oard'

&utt)" ;C..M.8

>(e relay a&t)6e4 LED, MGe o6er 6olta"e Op at relay G- tur o'

LED/ MGe o6er 6olta"e Op T\[\+. tur o' at t(e 4a2e t)2e 4et

4)"al to o6er &urret prote&t)o LCU3oard8

1.. Loss of s"nhroniKation ?level 1A

Not 4ett)"

1.2. Loss of s"nhroniKation ?level 'A*

Not 4ett)"

1.F. Loss of E3itation.

+ Relay G- pro6)de4 Lo44 o0 E7&)tat)o /- 0u&t)o w)t( two 4ta"e4 a4

0ollow4!


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)igure '* T#o stages of loss of e3itation rela"

o \3! Geerator )2peda&e

o C.! Ceter o0 =oe . &(ara&ter)4t)&!5M

.,

Zb X dC

+=

o R.! Rad)u4 o0 =oe . &(ara&ter)4t)&! .,

ZbR =

o C,! Ceter o0 =oe , &(ara&ter)4t)&!5

M , ,Xd X d

C +=

o R,! Rad)u4 o0 =oe , &(ara&ter)4t)&! ,,

XdR =

o Sett)" para2eter!

Ceter o0 =oe .! ,-8 M rad)u4! .8 M t)2e delay t -848

Ceter o0 =oe ,! /8-. M Rad)u4! ,8 M t)2e delay t .848

Relay a&t)6e 4ed tr)pp)" 4)"al to &)r&u)t 3rea1er at t(e output o0

"eerator8

>(e relay a&t)6e4 LED. MLo44 o0 e7&)tat)o OP at relay G- tur

o' LED MLo44 o0 e7&)tat)o OP T\[\+. tur o' at t(e 4a2e t)2e

4et 4)"al to LCU3oard8


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1.. 1// stator earth fault protetion

U4)" to prote&t "eerator4 0ro2 4tator eart( 0ault8

G- u4e4 + (ar2o)& 6olta"e to prote&t .-- 4tator w)d)"8 T()4 prote&t)o

ta1e4 4)"al 0ro2 G.+TV. MG,+TV. ad G.+TV MG,+TV w(e 6olta"e U -8.pu M.'V a0ter t 4 relay w)ll a&t)6e8

T(e prote&t)o operate4 to a&t)6e pole &)r&u)t 3rea1er -.' d)e &utt)" "eerator'

4ed)" prote&t)6e 4)"al . ad prote&t)6e 4)"al , to LCU 3oard8

>(e relay a&t)6e4' LED, M.-- 4tator eart( 0ault II 4tator OP at relay G-

tur o' LED M.-- 4tator eart( 0ault II 4tator OP T\[\+. tur o' at t(e 4a2e

t)2e 4et 4)"al LCU 3oard8

1.D. D stator earth fault protetion.

U4)" to prote&t "eerator4 0ro2 4tator eart( 0ault

T()4 ta1e4 4)"al 0ro2 G.+TV MG,+TV8 >(e 6olta"e U -8-pu M.,V ad

a0ter t -84 relay w)ll a&t)6e48

>(e relay a&t)6e LED M 4tator eart( 0ault I 4ta OP at relay G- tur o'

LED M Stator eart( 0ault I 4ta OP T\[\+. tur o' at t(e 4a2e t)2e 4et

4)"al to LCU 3oard1.1/. Over e3itation protetion ?level 1A

T()4 ta1e4 4)"al 0ro2 G.+TV. MG,+TV.8 >(e 6olta"e U .8.pu M..U2

ad a0ter t 4 relay w)ll a&t)6e8

T(e prote&t)o operate4 to a&t)6e pole &)r&u)t 3rea1er' d)e &utt)" "eerator8

>(e relay a&t)6e4' LED/ Mo6er o0 e7&)tat)o I Sta"e OP at relay G- tur o'

LED.- Mo6er o0 e7&)tat)o I Sta"e OP T\[\+. tur o' at t(e 4a2e t)2e 4et

4)"al to LCU 3oard8

1.11. Over e3itation protetion ?Level 'A

T()4 ta1e4 4)"al 0ro2 G.+TV. MG,+TV.8 >(e 6olta"e rea&(e4 U .8pu

M.-Ud2 ad a0ter t .4 relay w)ll a&t)6e8

>(e relay a&t)6e' LED Mo6er o0 e7&)tat)o II Sta"e OP at relay G- tur o'

LED.. Mo6er o0 e7&)tat)o II Sta"e OP T\[\+. tur o' at t(e 4a2e t)2e 4et

4)"al to LCU 3oard8


24/35

1.1'. Over load protetion

U4)" to prote&t "eerator4 0ro2 o6er load ad e4ure 3a&1 up 0or "r)d related

ele2et4 ) &a4e o0 t(ree p(a4e 4(ort &)r&u)t8

Prote&t)o =oe 0ro2 G.+TA/ MG,+TA/ to tra42)44)o l)e8 , 4ta"e4!

K Sta"e .! T /'4 I .8-pu M,-A a&t)6e4 &au4e4 LED MG 4y22etry

o6erload OP I Sta at relay G- tur o' LED. MG 4y22etry o6erload OP I

T\[\+. tur o' at t(e 4a2e t)2e 4et 4)"al to LCU 3oard8

K Sta"e ,! T -84 I .8.,pu M,--A t(e prote&t)o operate4 to a&t)6e pole

&)r&u)t 3rea1er' d)e &utt)" "eerator8 Relay a&t)6at)o &au4e4 LED MG

4y22etry o6erload OP II Sta at relay G- tur o' LED. MG 4y22etry

o6erload OP II Stator T\[\+. at t(e 4a2e t)2e 4et 4)"al to LCU 3oard8

1.1(. PT disonnetion

PT d)4&oe&t4 w(e "eerator4 operate LED MPT d)4&oe&t)o OP at relay

G- tur o8

1.10. CT disonnetion $2/

CT d)4&oe&t4 w(e "eerator4 operate LED MCT d)4&oe&t)o OP at relayG- tur o8

1.1. Installation failure $2/

G- al4o pro6)de 0u&t)o t(at 4el0+&(e&1)" w(e )4tallat)o 0a)lure8 LED/-

MI4tallat)o 0a)lure at relay G- tur o8

'. The protetion for transfor%er

o Relay T

;au0a&turer! Geeral Ele&tr)&

Sour&e! ,,-VDC

;a7)2u2 power &o4u2)"! ->

Stora"e te2perature! +/--C to --C

Operat)oal te2perature! +,--C to -C ) . (our48

Hu2)d)ty! Up to


25/35

'.1. !ifferential Rela"ing

U4)" to prote&t tra40or2er 0ro2 p(a4e to p(a4e 4(ort &)r&u)t ) Tra40or2er

w)d)"8 T()4 )4 2a) prote&t)o 0or tra40or2er ad oly a&t)6e w)t( e7teral

0ault P)&1 up 6alue I -8 A pr)2ary 4)de (ay I -A 4e&odary 4)de8

Prote&t)o =oe! Fro2 &urret tra40or2er G.+TA.- MG,+TA.- lo&ated at

output o0 "eerator to &urret tra40or2er CT..+TA MCT,.+TA lo&ated at

output o0 tra40or2er8

T(e prote&t)o operate4 w)t(out t)2e delay to a&t)6e pole &)r&u)t 3rea1er -.' d)e

&utt)" "eerator' 4ed)" prote&t)6e 4)"al . ad prote&t)6e 4)"al , to LCU

3oard' &utt)" ;C..M.' &utt)" ;C.,M./ ad /.M/, ad tr)""er 0)re

4y4te2 o0 tra40or2er8

Relay a&t)6at)o &au4e4 LED, M;a) T d)00 OP at relay T tur o' LED.

M;a) T d)00 OP T\[\+. tur o' at t(e 4a2e t)2e 4et 4)"al to LCU 3oard8

'.'. Transfor%er over loading protetion

U4)" to prote&t tra40or2er 0ro2 o6er load)" ad e4ure 3a&1 up 0or "r)d

related ele2et4 ) &a4e o0 t(ree p(a4e 4(ort &)r&u)t8 Prote&t)o =oe 0ro2 T.+TA, MT,+TA, to tra42)44)o l)e8

P)&1 up 6alue I 8,pu w)t( t)2e delay t .8 4e&od8

Relay a&t)6at)o &au4e4 LED, Mo6er load Op at relay T tur o' LED.

Mo6er load Op T\[\+. tur o' at t(e 4a2e t)2e 4et 4)"al to LCU 3oard8

'.(. Mero seJuene ti%e over urrent protetion stage 1 ?' ti%e stageA

T()4 ta1e4 4)"al 0ro2 CT..+TA MCT,.+TA8o T)2e 4ta"e .! >(e &urret rea&(e4 I -8/pu ad a0ter t 84 relay w)ll

a&t)6e

Relay a&t)6e4 to 3rea1 &)r&u)t 3rea1er ;C.. M.' ;C., M./

Relay a&t)6at)o &au4e4 LED, MNeutral o6er &urret I Sta"e T. OP at

relay T tur o' LED,- MNeutral o6er &urret I Sta"e T. OP T\[\+.

tur o' at t(e 4a2e t)2e 4et 4)"al to LCU 3oard8

o T)2e 4ta"e ,! >(e &urret rea&(e4 I -8/pu ad a0ter t /4 relay w)ll


26/35


27/35

4)"al to LCU 3oard8

'.2. Cooling transfor%er protetion

For t()4 0u&t)o' G- u4e4 a4 o6er load prote&t)o8

>(e &urret 6alue rea&( I .8pu ad a0ter t ,84 relay w)ll a&t)6e8 Relay a&t)6at)o tr)""er4 &ool)" 0a4 o0 tra40or2er8

Relay a&t)6at)o &au4e4 LED, MCurret 4tat)" OP &ooler at relay T tur o'

LED, MCurret 4tat)" OP &ooler T\[\+. tur o' at t(e 4a2e t)2e 4et 4)"al

to LCU 3oard8

'.F. Start breaer failure 1F1?1F(A

U4)" a4 3a&1 up 0or t(e ot(er prote&t)o4 ) &a4e o0 t(e ot(er4 do:t a&t)6e' a0ter

T -8.4 !

Relay a&t)6ate4 to 3rea1 &)r&u)t 3rea1er ;C.. M.8

Relay a&t)6at)o &au4e4 MStart 3rea1er 0a)lure at relay T tur o' LED, MStart

3rea1er 0a)lure T\[\+. tur o' at t(e 4a2e t)2e 4et 4)"al to LCU 3oard8

'.. Start breaer failure 1F'?1F0A

U4)" a4 3a&1 up 0or t(e ot(er prote&t)o4 ) &a4e o0 t(e ot(er4 do:t a&t)6e 'a0ter

T -8.4 Relay a&t)6ate4 to 3rea1 &)r&u)t 3rea1er ;C.. M.8

Relay a&t)6at)o &au4e4 LED/ MStart 3rea1er 0a)lure at relay T tur o'

LED, MStart 3rea1er 0a)lure T\[\+. tur o' at t(e 4a2e t)2e 4et 4)"al to

LCU 3oard8

'.D. CT disonnetion

PT d)4&oe&t4 w(e "eerator4 operate LED MCT d)4&oe&t)o OP relay

T tur o8

'.1/. Installed failure T(

T al4o pro6)de 0u&t)o t(at 4et0+&(e1)" w(e )4talled 0a)lure8 LED/-

MI4talled 0a)lure at relay T tur o8


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III. Operational proess

1. Start unit diagra%

)igure (* Start ,nit !iagra%


29/35

START UNIT DIAGRA;

STEP . Ope Gate 6al6e T(e u)t )4 4topp)"

STRT ,NIT

Go6eer auto operat)o

E7&)tat)o e


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'. Stop unit diagra%

)igure * Stop ,nit !iagra%


31/35

STOP UNIT DIAGRA;

STEP . Redu&e P' b

STOP ,NIT

Speed

Gate po4)t)o 4w)t&( 0ull &lo4e

Pole &)r&u)t 3rea1er ) tr)pp)" po4)t)o

A)r ru33er r)" pre44ure OJ Geerat)" u)t do:t (a6e ay &ot)"e&)e4

STEP , Gu)de Va Part Clo4e

NOLOAD

STEP * No6olta"e+order

Stop+ Order

NOVOLT

Stop + order

Stop e7&)tat)oSTEP /

STEP

STEP ra1e re4et

STEP

F)ll a)r ru33er

E7tra&t o)l 2)4t

Super6)4e 4top u)t

STOP

Gate po4)t)o 4w)t&(

Speed o0 u)t )4 ,-

STEP

Speed o0 u)t )4

F)ll 3ra1er

A)r pre44ure 3ra1er OJ

)igure 2* Stop unit diagra%?GloA


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I-. Gla Start proedure

1. hat is bla start*

la&1 Start )4 t(e pro&edure to re&o6er 0ro2 a total or part)al 4(utdow o0 t(e

tra42)44)o 4y4te2 w()&( (a4 &au4ed a e7te4)6e lo44 o0 4uppl)e48 T()4 eta)l4

)4olated power 4tat)o4 3e)" 4tarted )d)6)dually ad "radually 3e)"

re&oe&ted to ea&( ot(er ) order to 0or2 a )ter&oe&ted 4y4te2 a"a)8

I "eeral' all power 4tat)o4 eed a ele&tr)&al 4upply to 4tart up! uder or2al

operat)o t()4 4upply would &o2e 0ro2 t(e tra42)44)o or d)4tr)3ut)o 4y4te2@

uder e2er"e&y &od)t)o4 la&1 Start 4tat)o4 re&e)6e t()4 ele&tr)&al 4upply

0ro2 42all au7)l)ary "eerat)" plat lo&ated o+4)te8 Power 4tat)o4 w)4()" to

3e&o2e 3la&1 4tart 4tat)o4 (a6e to 2eet a r)"orou4 4et o0 &r)ter)a 3ot( 3e0ore

ad a0ter t(e 3la&1 4tart 0a&)l)t)e4 (a6e 3ee 3u)lt8 Oly 4tat)o4 w()&( are a3le to

pro6)de power to t(e o6erall "r)d o&e 4tarted are 4ele&ted to 3e&o2e 3la&1 4tart

4tat)o48

o ;a9or la&1 4tart up pla ) Nort(!

;a9or pla ! Hoc (

a&1up pla! S La8

o ;a9or 3la&1 4tart up pla ) Sout(!

;a9or pla! Trf A8

a&1up pla! Hc2 T(ug' $) N)(' $a N()28

o ;a9or la&1 4tart up pla ) ;)ddle!

;a9or pla! Sh 4a /8

a&1up pla! u Jp' Srhpo1 ' u Tua4ar(' A Vi"

'. )untion and reJuire%ent of bla start plan

To pro6)de a 3la&1 4tart' power 4tat)o (a4 d)e4el "eerator4' or2ally &alled t(e

la&1 Start D)e4el Geerator MSDG8 D)e4el "eerator 4er6e4 a4 4tad3y

"eerator4 t(at auto2at)&ally 4tart ad pro6)de power to t(e e44et)al pla

e


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D)e4el "eerator alway4 ) ready &od)t)o8

T)2e 0or 4tart)" D)e=el "eerator )4 2))2u2

A3out "eerat)" u)t4! e ready to 4tart' 4ta3le operat)o8 Dur)" 3la&1 4tart'

"o6erer ad e7&)tat)o 2ode 4w)t&( to (ad 2ode8

(. Gla start seJuene

O00)&er o0 wat&(er order4 4()0t &rew prepar)" t(e te4t &od)t)o4 0or t(e U)t .

re4tart8

Head o0 4()0t &rew a44)"ed a4 appropr)ate to &(e&1 t(e 4peed' e7&)t)"' &ool'

dr)6e o)l' "a4 )4ert4 j

Head o0 t(e 4()0t &o22ad &eter 0or o load ad o e7&)tat)o 0ro2 u)t .8

Sp)dle &eter to &(e&1 t(e &od)t)o4 ready to &odu&t lau&( ad &lo4ely

2o)tor t(e 4tatu4 o0 t(e u)t ad report &a4e4 pro2ptly (ead4888

>(e 4tart )4 &o2pleted' "eerator )4 ) o load' o e7&)tat)o &od)t)o8

O00)&er o0 wat&(er &o22ad 2aually &lo4ed' t(e ele&tr)& wat&(er )2ple2eted8

>(e u)t (a6e t(e 6olta"e' e7&)tat)o tra40or2er )4 &(e&1ed8

Ele&tr)&)ty o00)&er o0 wat&(er 2u4t 3e alway4 ) t(e e7&)tat)o 3oard8

C()e0 order4 t(at 4()0t "o6erer to 2aual 2ode' 2a&()e o00)&er o0 wat&(er)2ple2et4 ad 6)")l at ele6at)o ,8


34/35

Chapter (. E3periene gained during the internship

T(e trad)t)oal way to lear a3out 4o&)al 4&)e&e4 ) a u)6er4)ty 4ett)" )&lude4

ta1)" &our4e4 t(at tea&( t(eoret)&al 0ra2ewor14 ad 4&)et)0)& 2et(odolo")e4

t(at are real1)" )to t(e plat o t(at 0)r4t day wa4 a real 4(o&1 3e&au4e' e6e t(ou"( I

1ew t(e 3a4)& t(eory o (ow a (ydropower 4tat)o ru4' I (ad:t t(e 4l)"(te4t

)dea o0 (ow )t &ould (a6e 3ee ) real)ty8 I 2u4t ad2)t t(at I wa4 lu&1y to 3e part

o0 a 0ata4t)& tea2 o0 pro0e44)oal4 w(o were al4o re"ular people8 T(ey 2ade

e00ort4 to tea&( 2e e6eryt()" a3out t(e)r pro0e44)o 0ro2 t(at 6ery 0)r4t day8 I2y op))o' t(e add)t)oal 41)ll4 ad 1owled"e t(at I "a)ed dur)" t(e

)ter4()p &a 3e d)re&tly appl)ed to 2y 4tud)e4' t()4 ) tur w)ll (elp 2e

pro"re44 to t(e e7t 4ta"e o0 2y &areer pat( 2ore e00e&t)6ely8


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Referene

n. Do&u2et o0 Cua Dat Hydropower pla

internship report trung v1

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