he thong cung cap dien - slide tc

8/12/2019 He Thong Cung Cap Dien - Slide TC

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LL VitVit TinTinEPSDEPSD, SEE,, SEE, HUSTHUST

1.1. GiiGii thiuthiu chungchung vv hh thngthng inin

2.2. TngTng quanquan cngcng nghngh snsn xutxut inin nngnng

3.3. KhiKhi nimnim vv lili inin

4.4. KhiKhi nimnim vv hh thngthng cungcung cpcp inin

5.5. CcCc kk hiuhiu thngthng dngdng trongtrong thitthit kk hh

thngthng inin

NiNi dungdung


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HHthngthng cungcung cpcpinin

TngTng quanquan chungchung

MchMch inin xoayxoay chiuchiu nn gingin NgunNgun ((mymy phtpht ngng bb nn))

ngng dydy ((dydy dndn),), PhPh titi ((bngbng nn))

iuiu khinkhin ((cngcng tctc,, ngng hh oo))

TTTTiiii

Nh my in

Cc nh my sn xut in nng t cc ngunnng lng khc (Du, ht nhn, hoc nhitnng)

Trm bin p my pht (s/s) ni nh my invi h thng truyn ti qua cc my bin ptng p.

Li truyn ti

Li truyn ti chuyn in nng i xa t nhmy in ti li phn phi. in p khong230 1100 kV.

H thng truyn ti gim in p xung khong36-230 kV.

Cc h thng truyn ti chuyn in nng tli truyn ti n li phn phi.

Li phn phi

Gim in p xung in p c bn ca li phn phi.

H thng phn phi nhn in nng t li phn phi qua cc my bin p phn phi.in p khong t 4.16-34.5 kV

My bin p phn phi chuyn i xung in p s dng v chuyn ti khch hng sdng in.


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CcCc cc imim cngcng nghngh caca hh thngthng inin inin nngnng nhnnhn chungchung khngkhng tchtch trtr cc inin nngnng cc toto rara tt cccc ngunngun nngnng lnglng khckhc

CcCc ququ trnhtrnh inin xyxy rara rtrt nhanhnhanh

CcCc chch caca hh thngthng inin ll cccc ququ trnhtrnh ngng,,lienlien tctc thaythay ii theotheo thithi giangian nhnh cccc thngthng ss vnvnhnhhnh,, nhunhu cucu phph titi

QuanQuan hh chtcht chch vivi tttt cc cccc ngnhngnh caca nnnn kinhkinhtt..

HHthngthng cungcung cpcpininTngTng quanquan chungchung

CcCc yuyu cucu cc bnbn ii vivi hh thngthng inin pp ngng cc titi aa nhunhu cucu phph titi cccc ii btbt cc

thithi imim nono..

m bo cung cp in tin cy v an ton..m bo cung cp in tin cy v an ton..

mm bobo chtcht lnglng inin nngnng theotheo yuyu cucu..

CC tnhtnh kinhkinh tt caocao..


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HH thngthng inin tngtng lailai SS dngdng cccc nhnh mymy vava vv

nhnh

SS dngdng nngnng lnglng titi toto

HH thngthng inin thngthng minhminh

NhNh mymyininNguynNguyn ll chungchung

PhngPhng phpphp truyntruyn thngthng

NhNh mymy thythy inin,, ll cccc nhnh mymy binbin iinngnng lnglng caca dngdng ncnc thnhthnh inin nngnng....

NhNh mymy nhitnhit inin,, nhitnhit nngnng thuthu cc khikhi ttcccc nhinnhin liuliu (than,(than, dudu,, khkh tt )) cc chuynchuynhaha thnhthnh inin nngnng..


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PhngPhng phpphp khckhc NngNng lnglng titi toto

NngNng lnglng gigi PinPin mtmt tritri

NhNh mymyinin

NguynNguyn ll chungchung

NguynNguyn ll hothot ngng

NhNh mymyininNhNh mymy nhitnhitinin

NhitNhit dodo tt nhinnhinliuliu binbin ncncthnhthnh hihi (2)(2) trongtrong

bungbung tt thnhthnhhihi pp sutsut caocao (3)(3)lmlm quay turbinequay turbine(4)(4) cc nini vivitrctrc (5)(5) nn mymyphtpht (6)(6) snsn xutxutinin nngnng..


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CcCc dngdng nhnh mymy nhitnhit inin sausau DngDng nhinnhin liuliu: Than: Than hochoc dudu TuaTua binbin khkh.. TuaTua

binbin khkh gas,gas, nngnng lnglng mtmt tritri hochoc nngnng lnglngsinhsinh khikhi..

NhNh mymyinin

NhNh mymy nhitnhitinin

TheoTheo phph titi nhitnhit:: NhitNhit inin ngngngng hihi,, nhitnhitinin trchtrch hihi..


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NhNh mymyinin

NhNh mymy thythyinin

NguynNguyn ll hothot ngng

ThTh nngnng ncnc QuayQuay tuatua binbin MyMy phtpht inin

NhNh mymyininNhNh mymy thythyinin

CngCng sutsut caca nhnh mymy thythy inin

PhnPhn loiloi NhNh mymy thythy inin kiukiu pp..

NhNh mymy thythy inin tchtch nngnng..

NhNh mymy thuthu inin kiukiu ngng dndn..

P = 9.81 Q H

P: Cng sut (kW): hiu sut ca nh myQ: Lu lng nc chy (m3/s)

H: Chiu cao ct nc (m)


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NhNh mymy thythy inin kiukiu pp:: to ract nc H bng cch xyp ngndng nc. Ncc dn qxua tuabin bngng dn.

NhNh mymy thythy inin kiukiu knhknh dndn::dng knh dn to r a ct nc. Knhdn gm hai phn: phnu l knhdn h ( hoc hm dn nc) dnga nc t ni c mc nc caonni c mc nc thp; phn cui lngdn kna nc t trn cao xungthp chy tua bin.


uu nhcnhc imim++ ChiChi phph vnvn hnhhnh thpthp,, vnvn hnhhnh nn gingin,, khkh nngnng tt ngng

haha caocao,, khngkhng cncn nhiunhiu nhnnhn cngcng nnnn gigi thnhthnh inin nngnngthpthp..

++ KhKh nngnng huyhuy ngng cngcng sutsut nhanhnhanh (1(1 2ph) =>2ph) => cc ththphnphn chocho vivi nhnh mymy thythy inin hochoc vivi tt mymy caca chngchnglmlm nhimnhim vv iuiu tntn ((gnhgnh phph titi nhnh).). HiuHiu sutsut caocao858590%90%

++ LngLng inin tt dngdng thpthp dodo khngkhng cc ll hihi vv khukhu xx llnhinnhin liuliu..

++ KhngKhng gygy nhimnhim..

++ NhNh mymy thythy inin kiukiu pp cncn mangmang nn nhiunhiu ngunngun lilikhckhc nhnh iuiu tittit ncnc phcphc vv thythy lili,, nuinui btbt thythy snsn,, cicitoto cnhcnh quanquan mimi trngtrng, du, du lchlch..


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NhNh mymyinin

NhNh mymy thythyinin

uu nhcnhc imim-- GiGi thnhthnh xyxy dngdng tt dodo ngoingoi chichi phph xyxy dngdngnhnh mymy cncn cc chichi phph xyxy dngdng cccc ngng dydy caocaopp aa inin tt nhnh mymy vovo lili, chi, chi phph didi dndn ..-- ThiThi giangian xyxy dngdng lulu (10(10--2020 nmnm))-- ThngThng phiphi xyxy dngdng xaxa vngvng phph titi nnnn tntnthttht trntrn hh thngthng truyntruyn titi lnln-- NgunNgun ncnc cungcung cpcp chocho cccc nhnh mymy thythy inin((tt cccc dngdng chychy tt nhinnhin)) thaythay ii theotheo thithi giangian((phph thucthuc khkh huhu,, thithi tittit) =>) => gpgp khkh khnkhntrongtrong vicvic xyxy dngdng phngphng nn iuiu tittit titi uu..-- GyGy nhnh hnghng btbt lili nn mimi trngtrng sinhsinh thithi..

KtKt lunlun XyXy dngdng trntrn cccc dngdng sngsng cc lnln caocao vv chychy

xuytxuyt..

thth phph titi tt do,do, phnphn nhnh vv yy thth ((tntn ssvv thythy lili).).

iuiu tittit thythy lili,, ll ltlt khikhi thitthit kk nhnh mymy..



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NhNh mymy inin dngdng scsc gigi

NngNng lnglng titi toto,, khngkhng nhimnhim

VnVn uu tt lnln (~2USD/W)(~2USD/W)

KtKt nini vivi lili khkh..

NhNh mymyinin

CcCc nhnh mymy dngdng khckhc

PinPin mtmt tritri NngNng lnglng titi taotao

CuCu trctrc cc nhnh vv tt sasa chacha..

ngng sutsut phtpht phph thucthuc vv

thithi tittit.. uu tt caocao chocho dd nn nhnh(2(2--

3USD/W),3USD/W), nhngnhng ss tittit kimkimchocho hh thngthng lnln//

NhNh mymyininCcCc nhnh mymy dngdng khckhc

Photons of light excites electronsPhotons of light excites electronsin the junction into a higher statein the junction into a higher stateof energy, allowing them to act asof energy, allowing them to act ascharge carriers for a currentcharge carriers for a current


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inin pp caca lili inin TiuTiu chunchun::ANSI 84.1ANSI 84.1--1995, IEC1995, IEC--3838--19831983

inin pp nhnh mcmc ((danhdanh nhnh))LL inin pp chunchun mcmc thitthit kk

CcCc cpcp inin pp nhnh mcmc (ANSI C84.1):(ANSI C84.1): HH pp:: Less than 1kVLess than 1kV

TrungTrung pp:: 11--100kV100kV

CaoCao pp:: 100100--230kV230kV

NhNh mymyinin

LiLiinin

inin pp caca lili inin ChnChn inin pp titi inin titi uu thngthng gpgp khikhi thitthit

kk cungcung cpcp inin chocho mtmt phph titi..

CngCng thcthc kinhkinh nghimnghim CngCng sutsut truyntruyn titi (P, MW)(P, MW) ChiuChiu didi (L, km)(L, km)

NhNh mymyininLiLiinin

PL

U

2500500

1000

+

=

PLU .16.34,4 +=


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PhnPhn loiloi lili inin LiLi inin xoayxoay chiuchiu vv LiLi inin mtmt chiuchiu 11 phapha vv 33 phapha TheoTheo inin pp:: hh,, trungtrung,, caocao.. TheoTheo lnhlnh thth TheoTheo tnhtnh chtcht hh tiutiu thth

NhNh mymyinin

LiLiinin

HH thngthng phnphn phiphi mtmtphapha vv 33 phapha MtMt phapha 22 dydy MtMt phapha 33 dydy


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NhNh mymyinin

LiLiinin

CcCc chcchc nngnng caca hh thngthng inin

HHthngthng cungcung cpcpininHHthngthng phnphn phiphiinin

LiLi phnphn phiphi vv hh thngthng phnphn phiphi

1. ng dy truyn ti, 2. Trm phn phi, 3.ngdy phn phi chnh, 4.ng dy

phn phi nhnh, 5. i dy phn phi cp 2

LiLi phnphn phiphi lllili nhnnhn ininnngnng vv aa nn

cccc khchkhch hnghngdngdng inin..

HH thngthng phnphnphiphi inin nini trctrctiptip nn tngtngkhchkhch hnghng ssdngdng inin..


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LiLi phnphn phiphi ccbnbn

HH thngthng phnphn phiphi inin cngcngnghipnghip

PhPh titi lnln tptp trungtrung

YuYu cucu nn nhnh caocao

thth bngbng phngphng

DngDng hnhhnh tiatia hochoc nini vngvng

ngng dydy ngnngn

MchMch nini songsong songsong

HHthngthng cungcung cpcpininLiLi phnphn phiphi ccbnbn

Li cao p

Trm inphn phi

Li phnphi chnh

Li phn phi thcp

My bin pphn phi

H thng n H thng n

HH thngthng phnphn phiphi thth PhPh titi uu ((mtmt phph titi caocao 55--50VA/m50VA/m22))

YuYu cucu nn nhnhcaocao

thth phph titithaythay ii lnln

DngDng ngng dydycpcp hochoc dydy trntrnkhngkhng

MchMch vngvng vv ninisongsong songsong


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LiLi phnphn phiphi ccbnbn

HH thngthng phnphn phiphinngnng nghipnghip

PhPh toto phnphn tntn(< 1VA/m(< 1VA/m22))

YuYu cucu nn nhnh thpthp

thth phph titi thaythay iilnln ((phph titi mymy bmbm))

LiLi hnhhnh tiatia

ngng dydy trntrn khngkhng ngng dydy didi,, mtmt

mchmch..

Trm inphn phi

H thngn

Li phnphi chnh

My bin pphn phi

KK hiuhiu thngthng dngdng trongtrong thitthit kk

LiLi inin NgunNgun (DC, AC)(DC, AC)

ngng dydy ((trntrn khngkhng,, cpcp,, thanhthanh cici))

MyMy binbin pp

MyMy ctct CuCu giaogiao

CuCu chch

ThitThit bb oo lnglng ((inin pp,, dngdng inin,, cngcng sutsut,, hh sscngcng sutsut))

PhPh titi ((bngbng nn,, ngng cc))


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KK hiuhiuinin


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1.1. KhiKhi nimnim chungchung

2.2. CcCc cc trngtrng caca phph titi inin3.3. CcCc phngphng phpphp xcxc nhnh phph titi tnhtnh tonton

4.4. BiuBiu phph titi vv dd bobo phph titi

NiNi dungdung


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1.1. KhiKhi nimnim chungchung1.1.1.1.nhnh nghangha ccbnbn

ThitThit bb tiutiu thth inin:: tiutiu thth inin nngnng chuynchuynthnhthnh cccc dngdng nngnng lnglng khckhc ((quangquang nngnng,, nhitnhitnngnng,, cc nngnng))

HH dngdng ((tiutiu thth)) inin:: LL mtmt hochoc mtmt tptp hphp ccccthitthit bb tiutiu thth inin dngdng chocho nhngnhng mcmc chch nhtnhtnhnh.. ThngThng ss phph titi W,W, VArVAr, VA or A., VA or A.

PhPh titi inin:: ll ii lnglng cc trngtrng chocho cngcng sutsut tiutiuthth,, vv cc thth biubiu dindin thngthng quaqua cccc ii lnglng nhnhdngdng inin,, cngcng sutsut tctc dngdng hochoc cngcng sutsut phnphnkhngkhng..

PhPh titi tnhtnh tonton:: PhPh titi dd bobo dngdng chocho thitthit kk..

1.1. KhiKhi nimnim chungchung1.2.1.2. TcTc dngdng nhitnhit caca dngdng inin lnln dydy dndn

PhngPhng trnhtrnh cncn bngbng nhitnhit chch lmlm vicvic bnhbnh thngthng

chI QQQ +=

tRIQI = ..2

= ..GcQh

t).(S.qQ cc = 1

NhitNhit lnglng dodo dngdng inin ::

NhitNhit lnglng tt nngnng

NhitNhit lnglng tata rara xungxung quanhquanh ::

Trong R: in tr ()I: dng in (A), t: thi gian (s)

c : Specific heat capacity (J/kg.Co)G: khi lng (kg) : nhit thay i (Co)q: nng sut ta nhit (W/m2.Co)Sc : din tch b mt (m2)1, : nhit trc v sau trong mi

trng (Co)

(1)(1)


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00 .)1( 1TtTt

ee

+=

cS.q

G.cT =0

cS.q

I.R 2=

0 =

011 =

TT00 :: hnghng ss thithi giangian phtpht nngnng caca vtvt liuliulmlm dydy dndn (10(10 phtpht chocho Cu, Al)Cu, Al)

:: nhitnhit nn nhnh :: nhitnhit vtvt liuliu11 :: nhitnhit banban uu caca vtvt liuliu00 :: nhitnhit mimi trngtrng

1 t

1.1. KhiKhi nimnim chungchung1.2.1.2. TcTc dngdng nhitnhit caca dngdng inin lnln dydy

VitVit lili (1),(1), chngchng tata cc

(2)(2)

11.. KhKhii ninimm chungchung11..33.. PhnPhn loloii phuphuttii

Phn loi theo in pPhn loi theo in p SiuSiu caocao pp (U>(U>330330kV)kV) CaoCao pp ((TrTrmm bibinn pp phnphn phphii 3535kV


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Phn loi theo tn sPhn loi theo tn s

Ph ti tn s cng nghipPh ti tn s cng nghip ((fCN = 50fCN = 5060Hz)60Hz)

Ph ti tn s thpPh ti tn s thp (f < fCN): bao gm cc ngf < fCN): bao gm cc ngc c vnh gp dng cho mc ch vn chuync c vnh gp dng cho mc ch vn chuyn.

Ph ti tn s caoPh ti tn s cao (f > fCN ): bao gm cc l(f > fCN ): bao gm cc lcao tn (f > 10000Hz) dng nu, luyn kimcao tn (f > 10000Hz) dng nu, luyn kim

loi; cc l ti, l trung tn (f < 10000Hz)loi; cc l ti, l trung tn (f < 10000Hz)


Phn loi theo yu cu cung cp inPhn loi theo yu cu cung cp in ll H tiu th loi 1:H tiu th loi 1: l h tiu th m khi b ngngl h tiu th m khi b ngng

cung cp in s gy thit hi ln cho nn kinh tcung cp in s gy thit hi ln cho nn kinh tquc dn, e da n tnh mng con ngi, nhquc dn, e da n tnh mng con ngi, nhhng n an ninh chnh tr quc gia nn khnghng n an ninh chnh tr quc gia nn khngcho php mt in. H tiu th loi 1 phi ccho php mt in. H tiu th loi 1 phi ccp in t hai ngun khc nhau.cp in t hai ngun khc nhau. Cc c quan chnh ph, bnh vin (phng m), x nghipCc c quan chnh ph, bnh vin (phng m), x nghip

ha cht (qu trnh thc hin phn ng, h thng thngha cht (qu trnh thc hin phn ng, h thng thnggi, khi thi c hi), x nghip luyn kim (l in).gi, khi thi c hi), x nghip luyn kim (l in).



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My bin pphn phi

PCDPhu tiloi 3

Phuti loi2

G

MCCB

Phu tiloi 1

My binp dphng

ATS


11.. KhKhii ninimm chungchung11..33.. PhnPhn loloii phuphuttii Phn loi theo ch lm vic:Phn loi theo ch lm vic:

Ph ti lm vic theo ch di hn :Ph ti lm vic theo ch di hn : nhit ca thitnhit ca thitb tng ln t nhit mi trng, t n ch xc lp vb tng ln t nhit mi trng, t n ch xc lp vduy tr trong mt thi gian diduy tr trong mt thi gian di ((cc my bm, my nn kh,cc my bm, my nn kh,qut gi)qut gi)

Ph ti lm vic theo ch ngn hn :Ph ti lm vic theo ch ngn hn : nhit canhit cathit b cha t n nhit xc lp th b ct khi li,thit b cha t n nhit xc lp th b ct khi li,nhit thit b tr v nhit mi trng v duy tr trongnhit thit b tr v nhit mi trng v duy tr trongmt thi gian di (mt thi gian di (mt vi gi trc khi c ng li vomt vi gi trc khi c ng li voli)li)

Ch ngn hn lp liCh ngn hn lp li periodic dutyperiodic duty :: nhit ca thitnhit ca thitb cha t n nhit xc lp th b ct ra khi li,b cha t n nhit xc lp th b ct ra khi li,nhit thit b cha tr v nhit mi trng th li cnhit thit b cha tr v nhit mi trng th li cng vo li. C nh vy lp i lp li nhiu ln.ng vo li. C nh vy lp i lp li nhiu ln.


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ChChddii hhnn

C

(oC)

t(s)1

C

(oC)

O t(s)1

tc

(oC)

O t(s)

T

C OC1

ChChngngnn hhnn

ChChngngnn hhnn llpp llii

TCDF

=

ChuChu kyky

:: ththii giangian ngng iinn

T :T : chuchu kykycngcng ttcc


22.. CCcc cc trngtrng ccaa phuphuttii iinn22..11..thithiphuphuttii

nhnh nghnghaa:: TPTTPT biubiu dindin ss thaythay ii cccc thngthng ss cctrngtrng caca phph titi inin theotheo thithi giangian.. CcCc thngthng ss nynygmgm cc cngcng sutsut tctc dngdng P(t),P(t), cngcng sutsut phnphn khngkhngQ(t),Q(t), dngdng inin I(t).I(t).

SaiSai s sththii giangian(()):: ttyy theotheo ccpp chchnhnh xxcc ccaa thithitt bb oo

mm,, thngthng ththngng 1515 phphtt ,, 3030 phphtt,, 11 gigihohocc ththmm chchnhinhiuu hnhn..

ThThii giangian khkhoo sstt(T):(T): cc thth ll 11 ngyngy,, nmnm,, tyty thucthuc vovokhongkhong thithi giangian ((nhunhu cucu)) khokho stst..

iinn nngnng(A):(A): xxcc nhnh bbii didinn ttchch phphaa ddii ngng congcongphuphuttii

=

==

T T

i

ii tPdttPA0

/

1

.).(


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DDngng ngng congcong thithiphuphuttii::

TPTTPT ddngng thngthng ththngng (CLC):(CLC):

bibiuu didinn giagitrtr phjphj ttii theotheo ththiigiangian

TPTTPT ddngng kkoo ddii (LDC):(LDC): ssppxxpp llii TPT LCLTPT LCL ththnhnh ddngng thithibibiuu didinn llnn theotheo ththiigiangian..

24 gi(ngy)15 pht kWng congphuti

22.. CCcc cc trngtrng ccaa phuphuttii iinn22..11..thithiphuphuttii iinn

CcCc phngphng phpphp xyxy dngdng thth phph titi

PhngPhng phpphp dngdng ngng hh tt ghighi:: ChoCho ssliliuu chchnhnh xxcc ((ngng hhttghighi,, cngcng tt iinn tt

)).. GhiGhi ngayngay rara gigiyy hohocc cc lulu trongtrong bbnhnh.. DDliliuu cc ththcc ssddngng trongtrong tngtng lailai..

PhngPhng phphpp oo vavghighi:: GiaGitrtr cc oo vavghighi mmtt ccchch thuthucngcng sausau nhnhngng

khokhongng ththii giangian nhnhtt nhnh.. PhngPhng phphpp nnyy ddngng trongtrong vvnn hhnhnh

PhngPhng phphpp ttngng hhpp:: PhngPhng phphpp ccngng thithicc xxtt nn trtrngng ss.. CC kktt ququ kkmm chchnhnh xxcc,, ddngng trongtrong ttnhnh totonn ss bb..


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22.. CCcc cc trngtrng ccaa phuphuttii iinn22..11.. CCcc cc trngtrng cngcng susutt

CngCng susutt danhdanh nhnh ((nhnh mmcc)) PPmm,, QQmm,, SSmm,, IImm:: llcngcng susutt ghighi trntrn nhnhnn thithitt bb. y l cng sut cc i cho php . y l cng sut cc i cho php thit b c th lm vic lu di m vn m bo ch tiu kinh t k thutthit b c th lm vic lu di m vn m bo ch tiu kinh t k thut

ii vvii mmtt thi thitt bb::Pm= Sm . cosmQm= Sm . sinm

ii vvii mmtt nhnhmm thithitt bb::

mm

m

SI =

3.U

m

m mi

i=1

P = P m

m mi

i=1

Q = Q 2 2m m mS = P +Q mmm

SI =

3.U


CngCng susutt danhdanh nhnh ((nhnh mmcc))

ngng cc llmm vivicc chchngngnn hhnn llpp llii::

TrongTrong o:: T% :T% : HH ss ngng inin tngtng icic tratra theotheo ss taytay..BnhBnh thngthng cc thth lyly T% =T% = 2525%.%.

ii vvii phu phuttii 11 phapha ddngng iinn pp phapha::

TrongTrong : P: P11pp--maxmax ll phph titi caca phapha cc phph titi lnln nhtnht trongtrong 33 phapha..

ii vvii phu phuttii 11 phapha ddngng iinn pp dydy::

TrongTrong : P: P11FF--maxmax ll phph titi dnginpdnginp dydy lnln nhtnht trongtrong 33 phapha..

'

dm dmP =P . T%

3p-td 1p-maxP =3.P

3p-td 1F-maxP = 3.P


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CngCng susutt tt PPtt:: ll cngcng susutt iinn uu vvoo ccaa thithitt bb ddngngiinn ngng vvii iinn pp tt vvoo thithitt bb bbngng iinn pp nhnh mmcc.. TrongTrong thithittkkcoicoi PPtt == PmPm

CngCng susutt trungtrung bbnhnh ((PtbPtb):):t

0 Ptb

P(t).dtA

P = =t T

P

P(t)

Ptb

Hnh 2.6

AP

n

i i

i=1tb n

i

i=1

P .t

P =

t


CngCng susutt trungtrung bbnhnh bbnhnh phngphng PtbbpPtbbp:: lcnglcng susutt ttnhnhtotonn ddaa theotheo cngcng susutt trungtrung bbnhnh bbnhnh phngphng ss mm bboo iiuu kikinntngtng ii vvttnn ththtt cngcng susutt vavttnn ththtt iinn nngnng..

CngCng susutt cccc ii ((PmaxPmax):): -- ll PtbPtb llnn nhnhtt ccaa phuphuttii

-- DDngng ttnhnh ttnn ththtt cngcng susutt llnn

nhnhtt,, chchnn dydy ddnn theotheo iiuu

kikinn phphtt nnngng ddii hhnn

t

2

tbbp

0

1P = . P (t).dt

t


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CngCng susutt nhnh nhnhnn PPnn:: cngcng susutt cccc ii ccaa phuphuttii xuxutthihinn trongtrong ththii giangian rrtt ngngnn

CngCng susutt ttnhnh totonn ((PttPtt):): PhPh titi tnhtnh tonton PttPtt ll cngcng sutsut gigithitthit lulu didi khngkhng ii trongtrong sutsut ququ trnhtrnh lmlm vicvic caca thitthit bb,, nngygy rara mtmt hiuhiu ngng nhitnhit hochoc mcmc huhoihuhoi cchcch inin caca thitthitbb ngng nhnh cngcng sutsut thcthc tt gygy rara chocho thitthit bb.. CngCng sutsut tnhtnhtonton cc dngdng trongtrong thitthit kk cungcung cpincpin..

22.. CCcc cc trngtrng ccaa phuphuttii iinn22..33.. CCcc hhssphuphuttii

HHssnhunhu ccuu KncKnc:: ththngng cc tt rara ii vvii ccccphuphuttii llnn

ii vvii 11 phuphuttii

ii vvii mmtt nhnhmm phuphuttii


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22.. CCcc cc trngtrng ccaa phuphuttii iinn22..33.. CCcc hhssphuphuttii

HHsscccc ii KKmaxmax:: ththngng cc tt ngng vvii caca llmm vivicccc phuphuttii llnn nhnhtt..

HHssngng ththii KtKt:: cc trngtrng chocho mmcc ssddngng iinnngng ththii ccaa cccc phuphuttii..

33.. CCcc phngphng phphpp xxcc nhnh phuphuttii ttnhnh totonn

MMcc chch:: XXcc nhnh phuphuttii ttnhnh totonn ddngng chocho thithittkk,, llaa chchnn thithitt bb..

PhuPhuttii ttnhnh totonnll phuphuttii giagiathithitt lulu ddii,, khngkhngii trongtrong susutt ququ trtrnhnh llmm vivicc,, gygy rara mmtt hihiuu

ququ phphtt nhinhitt ii vvii csccsc vvtt ddnn iinn ccaa hhththngngbbngng vvii cngcng susutt ththcc ttgygy rara trongtrong susutt ququtrtrnhnh llmm vivicc..


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M M

Li phnphi

Mybinpphnphi

Tuphn

phi

Thitb

2

1

3

H p

Trung p

ng

nhnh

CCcc v trv tr ththngng ddngng xxcc nhnh phuphuttii ttnhnh totonn


XXcc nhnh phuphuttii ttnhnh totonn theotheo PPtt vavKKncnc

VVii 11 phuphuttii::

VVii nhinhiuu phuphuttii

PhPhmm vivi pp ddngng::nn giginn tuytuy

nhinnhin kktt ququkhngkhng chchnhnh xxcc,,ththngng ccddngng trongtrong ttnhnhtotonn ss bb


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XXcc nhnh phuphuttii ttnhnh totonn theotheo PPtbtb vavKKmaxmax

PhPhmm vivi pp ddngng::cc xxtt nn llnnvavchchllmmvivicc ccaa ttngngthithitt bb nnnn kkttququ khakhchchnhnh

xxcc..

nnhqhq:: SSthithitt bb llmm vicvic hihiuu ququ


XXcc nhnh nnhqhq

TrTrngng hhpp 11

TrTrngng hhpp 22


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XXcc nhnh nnhqhq

TrTrngng hhpp ccnn llii

BBcc 11:: TTnhnh nn11 vavPP11ll thithitt b cb c cngcng susuttllnn hnhn PPmm maxmax

BBcc 22:: TTnhnh n* =nn* =n11/n/n vavP* = PP* = P11/P/P

BBcc 33:: XXcc nhnh nnhqhq**

BBcc 44:: nhqnhq == nnhqhq* x n* x n


XXcc nhnh phuphuttii ttnhnh totonn theotheo susutt phuphuttii trntrn mmttnn vv didinn ttchch

TrongTrong o::

pp00:: susutt phuphuttii trntrn mmtt nn vv didinn ttchch ssnn xuxutt (kW/m(kW/m22))FF:: DiDinn ttchch ssnn xuxutt (m(m22))

PhPhmm vivi pp ddngng:: ttnhnh totonn ss bbii vviicccc phuphuttii cc mmtt tngtng ii uu trntrndidinn ttchch ssddngng.. cc bibitt ttchch totonn phuphuttii chichiuu ssngng


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ReferencesReferences

http://electrical-engineering-portal.com/


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1.1. GiiGii thiuthiu chungchung

2.2. SS phnphn phiphi titi cccc trmtrm inin3.3. SS hh thngthng chnhchnh

4.4. SS hh thngthng thth cpcp

NiNi dungdung


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11.. GiGiii thithiuu chungchung

YuYu cucu ii vivi cccc ss cungcung cpcp inin

mm bobo tintin cycy cungcung cpcp inin VnVn hnhhnh anan tonton ii vivi ngingi vv thitthit bb LinhLinh hothot vv thunthun tintin trongtrong lplp tt,, vnvn hnhhnh vv sasa chacha.. DD dngdng phtpht trintrin pp ngng ss giagia tngtng caca nhunhu cucu phph titi.. HpHp ll vv mtmt kinhkinh tt..

CcCc vnvn chnhchnh khikhi thitthit lplp ss

CcCc cpcp inin pp vnvn hnhhnh cc imim linlin ktkt vivi ngunngun inin HnhHnh dngdng ss cungcung cpcp inin CcCc phngphng thcthc vnvn hnhhnh

McMc chch chnhchnh caca mnmn hchc::

HH thngthng cungcung cpcp inin ll hh thngthng phnphn phiphi inin..


XcXc nhnh ngunngun inin

NgunNgun ll cccc nhnh mymy ininkhikhi thitthit kk hh thngthng cungcung cpcp inincaca mtmt vngvng hayhay mtmt qucquc giagia.. KhiKhi tata thngthng gigi ll hhthngthng inin..

NgunNgun ll cccc trmtrm binbin pp khukhu vcvcthngthng cpcp inin mtmt khukhuvcvc lnln nhnh thnhthnh phph,, tnhtnh,, vngvng kinhkinh tt.. TrmTrm binbin pp khukhuvcvc lyly inin tt hh thngthng inin cc cpcp inin pp 110110--220220kVkV vv binbinii xungxung cpcp 3535kVkV cpcp inin chocho mngmng inin khukhu vcvc.. TyTytheotheo lnln phph titi,, ss hh thngthng inin mm mimi khukhu vcvc ccthth cc mtmt hayhay nhiunhiu trmtrm binbin pp khukhu vcvc.. tngtng tintin cycy,,mimi trmtrm cc tt nhtnht haihai mymy binbin pp.. CngCng sutsut mimi mymy binbinpp trungtrung giangian tt 2525MVAMVA nn 125125MVA.MVA.


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XcXc nhnh ngunngun inin

NgunNgun ll trmtrm binbin pp trungtrunggiangian cc thth cpcp inin chocho khukhu cngcng nghipnghip,,cccc nhnh mymy cc cngcng sutsut lnln,, cccc khukhu thth hochoc thngthng mimi.. TrmTrm binbin pptrungtrung giangian cc thth lyly inin tt hh thngthng inin cc inin pp 110110--220220kVkV hochoc tt mngmnginin khukhu vcvc 3535kVkV vv binbin ii xungxung inin pp trungtrung giangian 66--2222kV.kV. CcCc trmtrm binbinpp trungtrung giangian thngthng cngcng cc vv trtr quanquan trngtrng trongtrong hh thngthng cungcung cpcp ininnnnn mimi trmtrm cngcng thngthng cc haihai mymy binbin pp.. CngCng sutsut caca mimi mymy binbin pptrungtrung giangian tt 22,,55MVAMVA nn 4040MVAMVA

TrmTrm binbin pp phnphn phiphithngthng ll ngunngun cccc nhmnhm phph titi hh pp nhnh ccccphnphn xngxng trongtrong cccc nhnh mymy cngcng nghipnghip,, cccc cmcm dndn cc,, cccc cc quanquan,,cngcng ss.. TyTy theotheo lnln caca phph titi vv yuyu cucu cungcung cpcp inin mm mimi trmtrm ccthth cc mtmt nn haihai mymy binbin pp.. CngCng sutsut mimi mymy binbin pp phnphn phiphi tt5050kVAkVA nn 25002500kVA.kVA.

TT phnphn phiphi ininll ngunngun cpcp inin chocho cccc nhmnhm phph titi hh pp cngcngsutsut nhnh nhnh mtmt giangian phngphng lmlm vicvic hochoc sinhsinh hothot,, mtmt dydy truyntruyn snsn xutxutnhnh cc cngcng sutsut vivi chcchc kVAkVA

22.. CCcc ss hhththngng cungcung ccpp iinn22..22.. CCcc ddngng ss cungcung ccpp iinn

SS hhnhnh tiatia:: cccc phuphuttii cc ccpp iinn trtrcc titippttngungunn

oo uu iimm:: tintin ccyy caocao ((khikhi sscc11 ngng

dydy thithch cch c ngng dydy obb cctt rara))

ThiThitt kkchchnhnh nhnh bboo vvrr lelenn giginn,, ddttngng hhaa

NhNhcc iimm:: VVnn uu tt llnn ((chichiuu ddii ngng

dydy ddii))

ngng ddngng:: mmngng iinn caocao pp ccppiinn chocho phuphuttii quanquan trtrngng ((phuphuttiicngcng susutt llnn))


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SS ngng trtrcc chchnhnh::

oo uu iimm:: VVnn uu tt gigimm ((chichiuu ddiingng dydy vavthithitt bb ngng cctt))

NhNhcc iimm:: tintin ccyy cungcung ccpp iinn ththpp

((khikhi ssccngng trtrcc chchnhnh nhinhiuu

phuphuttii mmtt iinn)) KKmm linhlinh hohott khikhi vvnn hhnhnh

ThiThitt kkchchnhnh nhnh bboo vvrr lelephphcc ttpp

ngng ddngng:: ccpp iinn chocho phuphuttii ttquanquan trtrngng ((phuphuttii loloii 22,,33))


SS hhnn hhpp:: kktt hhpp gigiaa ss hhnhnh tiatiavavngng trtrcc chchnhnhoo C cC c uu nhnhcc iimm ccaa haihai loloii

ss trntrn

oo HHpp lylhhaa gigiaa chichi phph uu tt vav

tintin ccyy cungcung ccpp iinn

ngng ddngng:: ccpp iinn trongtrong cngcngnghinghipp


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SS mmchch vvngng k knn::oo uu iimm::

oo NngNng caocao tintin ccyy ((mmii phuphuttiiccpp iinn tt22 phphaa))

oo VVnn uu tt rr hnhn

NhNhcc iimm:: KhiKhi cc ssccoonn ngng dydy ggnn

ngungunn khokhmm bboo cc chchttllngng iinn nngnng vaviinn pp

VVnn hhnhnh phphcc ttpp

ThiThitt kkchchnhnh nhnh bboo vvrr lelephphcc ttpp

ngng ddngng:: ccpp iinn chocho mmngng caocaopp tngtng ccngng tintin ccyy..


SS ddnn susu:: aa ththngng cccc ngng dydycaocao pp ttii ttnn phuphuttiioo uu iimm::

oo GiGimm ttnn ththtt trntrn llii trungtrung pp

oo VVnn uu tt rr hnhn ((TBATGTBATG vavTPPTTTPPTT))

NhNhcc iimm:: TngTng vvnn uu tt ccaa ngng dydy trungtrung pp vavTBAPPTBAPP

VVnn hhnhnh phphcc ttpp,, khokhququnn lyl

ngng ddngng:: ccpp iinn chocho cccc phuphuttii cngcng susutt llnn nnmm susu trongtrongkhukhu vvcc phuphuttii cc mmtt ththpp..


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22.. SS phnphn phphii ttii cccc trtrmm iinn22..11.. GiGiii thithiuu chungchung

SS bbtrtr cccc trtrmm iinn

Cc thitb c bn trong trm phn phi (1ngui, 1 my bin p va4 lra).S trm phn phi - 3D

ThiThitt bb trongtrong trtrmm


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MMyy cctt caocao pp::CCtt ddngng iinn ngngnn mmchch..

CCuu giaogiao caocao pp::CCchch lili cccc bbphphnn trongtrong trtrmm bibinn pp trongtrong ququ trtrnhnh bboo trtr hohoccssaa chchaa,, mmvavngng ii vvii ddngng iinn bbnhnh ththngng ((ttii bb phaphhhngng)) hohocc khikhi khngkhng cc ddngng iinn ((khngkhng ttii) .) .

MMyy bibinn ddngng vavpp oo llngngGiGimm iinn pp vavddngng iinn ccpp iinn chocho cccc ngng hhvavthithitt bb bboovv..

ThiThitt bb phnphn phphii trungtrung pp ((thanhthanh ccii))ThThngng tt trongtrong hhpp hohocc v trv tr ththchch hhpp,, baobao ggmm ccuu giaogiao,, mmyycctt vavcccc thanhthanh ccii,, thithitt bb bboo vvvaviiuu khikhinn..

22.. TrTrmm bibinn pp22..22.. V trV tr tt

CCcc yyuu ttnhnh hhngng::

iinn pp,, giagingng dydy hohocc hhththngng phnphn phphii hohocc dodo ccccnguynnguyn nhnnhn khkhcc..

YuYu ccuu ii vvii v trv tr tt trtrmm

CCngng ggnn tmtm phuphuttii ccngng tttt.. ThuThunn titinn llpp tt,, vvnn chuychuynn,, vvnn hhnhnh vavssaa chchaa.. DDphphngng chchngng chchyy nn,, trtrnhnh bbii bbmm, , nhinhimm nn mmnn.. MMrrngng trongtrong tngtng lailai.. TTnhnh kinhkinh tt((tititt kikimm chichi phph nn bub))


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22.. TrTrmm bibinn pp22..22. Dung. Dung llngng trtrmm bibinn pp

SSllngng mmyy bibinn pp

DungDung llngng

t

n

Kn

SS

.

max

Sn: Cng sut ca my bin p (VA)Smax: Cng sut cc i ca ti

n: Slng my bin p

Kt: Hsnhit hiu chnh.t: Nhit mi trng

t0: Nhit mi trng thit kKol: Hsqu ti thit kca my bin p

QuanQuan trtrngng:: 22 tt quanquan trtrngng:: tt11 nn 22

BBnhnh ththngng:: 11

1001 0ttK

t

=

olt

n

KKn

SS

.).1(

max

For n > 1

MMtt thanhthanh ggpp

++ KKtt ccuu nn giginn,, rr tintin ccyy khngkhng caocao KhngKhng linhlinh hohott trongtrong vvnn hhnhnh

KhoKhkhnkhn khikhi bboo ddngng DDngng thithitt kkcccc trtrmm tt quanquan

trtrngng hohocc cccc tutuphnphn phphii iinnhh pp tt quanquan trtrngng

22.. TrTrmm phnphn phphii22..44.. SS hhththngng thanhthanhggpp


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++ NngNng caocao tintin ccyy cungcungccpp iinn..

GiaGiththnhnh tngtng dodo phphiithmthm mmchch phnphn oonn..

ThThngng ddngng chocho cccc phuphu

ttii quanquan trtrngng trongtrong lliitrungtrung vavhh pp..

ThanhThanh ggpp cc phnphn oonn


++ LinhLinh hohott vvii 22 thanhthanh ggpp++ ThanhThanh ggpp chchnhnh cc ththaa rara bboo

ddngng.. VVnn uu tt caocao dodo cc thmthm mmtt thanhthanh

ggpp vavmmii mmchch rara ccnn thmthm 11 daodaoccchch lyly..

44 daodao ccchch lyly chocho 11 mmchch.. KhiKhi sscctrntrn ngng dydy thithcc 22 thanhthanh

ggpp ss mmtt iinn..

HaiHai thanhthanh ggpp



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++ MMyy cctt cc ththaa rara ssaa chchaakhngkhng llmm mmtt iinn..

YuYu ccuu nhinhiuu mmyy cctt.. CCcc daodao ccchch lyly phphii hhpp phphcc ttpp

khikhi aa mmyy cctt rara ssaa chchaa..

ThanhThanh ggpp vvngng


HHththngng thanhthanh ggpp tintin ccyycaocao

HaiHai thanhthanh ggpp haihai mmyy cctt(a):(a):

MMyy cctt vav (b) (b) VVngng trtrnn (c)(c)

Ch Ch ::

++ nn nhnh caocao++ LinhLinh hohott khikhi ssaa chchaa.. tt ngng ddngng trongtrong trtrmm truytruynn

ttii hohocc nhanhmmyy iinn

(c)

(a) (b)


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ngng dydy:: vvtt liliuu ddnniinn,, hohocc treotreo (OHL).(OHL).

TrnTrn khngkhng:: dydy trtrnn hohocc ccpp..DyDy nhmnhm llii ththpp (ACSR)(ACSR)

ThiThitt bb ttngng ngng llii:: thithitt bb ttbboo vvkhikhi ssccvavrr lele ttngng ngng llii,, cc khakhanngnng kikimm tratra ssccgigiiitrtr..

CCpp:: DyDy cc baobao bbii ccchchiinn vavvvtt liliuu chchngng vava pp..

HHththngng chuchunn

HHnhnh tiatia SongSong songsong

((ChChnhnh,, ththccpp))

MMchch vvngng chchnhnh LLii phnphn bb

uu phapha

33.. KKtt ccuu hhththngng cungcung ccpp iinn33..22.. SS hhththngng


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2.2. CcCc thnhthnh phnphn chichi phph cc bnbn

3.3. CcCc phngphng phpphp soso snhsnh kinhkinh tt

NiNi dungdung


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11.. KhiKhi nimnim chungchung

PhngPhng phpphp titi uu haha trongtrong nghinnghin cucu hh thngthng ((lplpkk hochhoch,, thitthit kk vv iuiu khinkhin)) cc ngng dngdng trongtrongnhnh gigi kinhkinh tt..

NhngNhng phngphng nn thitthit kk thatha mnmn iuiu kinkin kk thutthutcc aa rara soso snhsnh kinhkinh tt..

tintin cycy:: TiTi uu haha chichi phph ll chichi phph thpthp nhtnht cc thth

chpchp nhnnhn cc.. ngng dungdung :: lala chnchn inin pp,, titi uu mngmng lili,, tittit dindin

dydy dndn, dung, dung lnglng mymy binbin pp,, titi uu dungdung lnglng bb,,qunqun ll nhunhu cucu..


PhnPhn tchtch KTKT--KTKTthngthng pp dngdng trongtrongnhngnhng bibi tonton sausau:: LaLa chnchn phngphng nn thitthit cungcung cpcp inin,, lala chnchn

thitthit bb inin..

TiTi uu haha chch vnvn hnhhnh ((thitthit bb,, hh thngthng).).

nhnh gigi khkh thithi cccc binbin phpphp nngnng caocao chch tiutiu KTKT--KTKT


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22.. CcCc thnhthnh phnphn kinhkinh ttccbnbn

TngTng chichi phph::baobao gmgm tttt cc cccc chichi phph xyxy dngdngvv vnvn hnhhnh hh thngthng..

VnVn uu tt:: uu tt cngcng trnhtrnh nhnh chichi phph xyxy dngdngvv chichi phph muamua smsm thitthit bb..

PhPh tntn vnvn hnhhnh (O&M):(O&M): ChiChi phph vnvn hnhhnh cacathitthit bb hochoc cngcng trnhtrnh trongtrong sutsut thithi giangian ss dngdng..

==

PhPh tntn vnvnhnhhnh (O&M):(O&M):nhnnhn cngcng vv

sasa chacha

VnVn uutt ++

TngTng chichiphph

TrongTrong thttht kk hh thngthng inin,, tonton bb chichi phph chocho dd nn::

VnVn uu tt

PhPh tntn vnvn hnhhnh

VnVn uu tt muamua smsm thitthit bb XyXy dngdng vv lplp tt cngcng trnhtrnh

inin..

ChiChi phph qunqun ll vnvn hnhhnhhnghng nmnm ((CCvhvh))

ChiChi phph tntn thttht inin (C(CEE)) TnTn thttht kinhkinh tt dodo inin

nngnng khngkhng mm bobo (H)(H)



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Gi

Dung lng (kVA)

My bin p

Gi

Dung lng (kVA)

Trm bin p

Gi

Tit din (mm2)

Cp

Gi

Dy trn khngTit din (mm2)

CMBA = CFB + CVB xSMBACD = CFD + CVD x F

CMBA , CD: Vn u t MBA v ng dy

CFB , CFD: Vn u t c bn MBA v ng dy.

CVB , CVD: Vn u t iu chnh ca MBA vng dy

SMBA: Dung lng MBA (kVA)

F : Tit din dy dn (mm2)


VnVn uu tt ngng dydy vv trmtrm binbin pp

VnVn uu tt (V)(V)

VnVn uu tt muamua smsm thitthit bb Vtb((ngng dydy,, trmtrmbinbin pp,, bobo vv,, ngng ctct ))

VnVn uu tt chocho cngcng tctc xyxy dngdng vv lplp tt cngcng

trnhtrnh Vxd..

V = Vtb +Vxd



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PhPh tntn vnvn hnhhnh (Y)(Y)

ChiChi phph qunqun ll vnvn hnhhnh hnghng nmnm ((Cvh)

ChiChi phph tntn thttht inin ((CE).

TnTn thttht kinhkinh tt dodo inin nngnng khngkhng mm bobo (H).(H).

Y = Cvh+ CE+ H


ChiChi phph qunqun ll vnvn hnhhnh hnghng nmnm ((Cvh))

CngCng vicvic qunqun ll vnvn hnhhnh thitthit bb hayhay cngcng trnhtrnhinin..

ChiChi phph chocho khukhu haohao,, bobo dngdng vv sasa chacha

TrTr lnglng chocho cngcng nhnnhn

KhonKhon chichi phph phph khckhc ((iuiu kinkin lmlm vicvic ))

Cvh= kvhV



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ChiChi phph tntn thttht inin::

TnTn thttht cngcng sutsut

TnTn thttht inin nngnng


A: Tn tht in nng (kWh)

: gi tn tht in nng($US/kWh)

CA = A.A = (PU + PI.LLF).8760

PI: Tn tht cng sut do dng in (kW)

PU: Tn tht cng sut do dng in p (kW)

LLF: H s tn tht



TrongTrong nhiunhiu trngtrng hphp khngkhng xtxt nn tntn thtthtcngcng sutsut,, nnnn chichi phph tntn thttht inin nngnng::

A: Tn tht in nng (kWh)

: gi tn tht in nng ($US/kWh)

CE = CA= A.



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7

TnTn thttht kinhkinh tt dodo inin nngnng khngkhng mm bobo (H)(H)

ChtCht lnglng inin nngnng kmkm gygy tntn thttht kinhkinh tt:: khkh nhnhlnglng vv phmphm vivi rngrng caca cccc hinhin tngtng chtcht lnglnginin nngnng..

ThitThit hihi kinhkinh tt dodo mtmt inin::

GimGim nngnng sutsut hochoc tngtng lnglng phph phmphm

HH hnghng thitthit bb hochoc riri lonlon ququ trnhtrnh cngcng nghngh,, NhnNhn cngcng khngkhng lmlm vicvic dodo mtmt inin..


ChCh ::VnVn uu tt vv phph tntn vnvn hnhhnh thngthng tt llnghchnghch vivi nhaunhau.. CcCc phngphng phpphp phnphn tchtch nhmnhm tmtmlili giigii titi uu..

33.. PhngPhng phpphp phnphn tchtch kinhkinh ttkkthutthut33..11..PhngPhng phpphp dngdng hmhm chichi phph tnhtnh tonton hnghng nmnm

McMc tiutiu::

SS dngdng nhnh gigi kinhkinh tt dd nn, regulated, regulatedmonopoly.monopoly.

PhPh tntn vnvn hnhhnh hnghng nmnm pp dngdng bngbng nhaunhau chocho

cccc nmnm dd nn.. KtKt ququ titi uu: Chi: Chi phph nhnh nhtnht..

HmHm chichi phph hnghng nmnm:: Z =Z = V.KV.Khqhq+ Y+ YOO MinMin

V:V: VnVn uu tt, Y, YOO:: PhPh tntn vnvn hnhhnh..KKhqhq:: HH ss thuthu hihi vnvn hiuhiu ququ

T:T: ThiThi giangian thuthu hihi vnvn tiutiu chunchun..TrongTrong cngcng nghipnghip (LX), T =(LX), T = 5588 nmnm

11TT

KKhqhq==


56/112

8

ChCh :: ii vivi mngmng hnhhnh tiatia,, cc thth gigi thitthit HH trongtrong ZZ nhnh nhaunhau

trongtrong cccc phngphng nn vv cc thth bb qua.qua. ngng thithi chichi phph tntnthttht inin,, chch xtxt thnhthnh phnphn chichi phph tntn thttht inin nngnng..

Z = V.Khq+ YO= V.(Khq+ Kvh) + A.

Covh= VKvh: chi ph hng nm cho bo dng sa cha qun lv d phng.

ii vivi dydy dndn,, cc thth xcxc nhnh cc mtmt kinhkinh tt theotheo::

MinF

LIFbaKAVKZ ++=+=

..3).(.. 2

0=

dF

dZ

bKF

IJ

op.

...3 ==

Where

V: Vn u t cho ngdy (V=(a+b.F)L)

: in tr sut ca vt liulm dy dn (.m)

Fop: Thit din dy dn kinht (mm2)

T = 8760h

...3

.bKIF

op=

PhngPhng phpphp dngdng hmhm chichi phph vngvng ii

ChiChi phph vngvng ii (LCC):(LCC): CcCc thitthit bb vv cngcng trnhtrnhinin thngthng cc lplp tt vv vnvn hnhhnh trongtrong mtmtthithi giangian didi vv chichi phph chocho nn trongtrong cccc nmnm khckhc

nhaunhau nhnhnhnh chungchung khckhc nhaunhau.. GiGi trtr hinhin titi thcthc (NPV):(NPV): GiGi trtr quiqui ii vv hinhin titi..

PhnPhn tchtch gigi bb nhtnht:: titi uu kinhkinh tt dd nn chnhchnh lltmtm gigi trtr hinhin thcthc (NPV)(NPV) nhnh nhtnht theotheo chichi phphvngvng ii..

33.. PhngPhng phpphp phnphn tchtch kinhkinh ttkkthutthut33..22.. PhngPhng phpphp dngdng hmhm chichi phph vngvng ii


57/112

9

GiGi trtr hinhin titi thcthc (NPV)(NPV) Thigian

Gi qui i

Hin ti P

Nm 1 P + P.i = P.(1+i)

Nm 2 P.(1+i) + P.(1+i)xi = P.(1+i)2

Nm n F = P.(1+i)n

ni

FP)1(

1.

+=

GiGi trtr NPV NPV thithi imim hinhin titi ll P,P, gigitrtr NPVNPV caca chichi phph FF xyxy rara cccc nmnm::

HH ss vngvng ii:: nFP iK )1(

1/

+=

nn vv

n

n

i

eFP

)1(

)1(.

+

+=

n:n: nmnm vngvng ii,,ii:: tt ll gimgim gigi ((vdvd. Theo. Theo ttsutsut ngnngn hnghng))

e:e: tt gigi((vdvd.. TT gigi hihi oioi))


TrongTrong AAkk:: DngDng cccc chichi phph chocho tngtng nmnm kkP:P: GiGi trtr hinhin titi thcthc caca dngdng cccc chichi phph AAkk

(k=(k=00n)n)

MM hnhhnh chichi phph chocho cngcng trnhtrnh inin

n

n

i

A

i

AP

)1(...

1

1

+++

+=

0 1 2 n

A1A2

An

Thi gian

(P)


= +

=

n

kk

k

iA

1 )1(


58/112


59/112

11

= +=

*

1 )1(

TT

kk

k

i

LOM

=

+=

*

0

*)1.(

T

j

jT

j iCC

VnVn uu tt vv chichi phph vnvn hnhhnh cc quyquy ii vv thithinmnm trctrc nhnh sausau

HmHm chichi phph tnhtnh tonton

==

+++=+=

*

1

*

0

*

)1()1.(

TT

kk

k

T

j

jTj

iLiCOMCTC

MinOMCTC +=

ChiChi phph tnhtnh tonton titi uu vv kinhkinh tt (NPV(NPV nhnh nhtnht))


NuNu thithi giangian lplp tt ll 11 nmnm (T*=0)(T*=0)

= +

+=

T

kk

k

i

LCTC

1 )1(

NuNu gigi thitthit phph tntn vnvn hnhhnh hnghng nmnm tt thaythay ii ththLLkk=L (k==L (k=11T)T)

AP

T

kk

KLCi

LCTC/

1

.)1(

1. +=

++=

=

ChCh mtmt ss trngtrng hphp ringring nhnh sausau::

ChiChi phph hnghng nmnm nhnh nhtnht

MinLKCAC PA += /.1)1(

)1.(/

+

+=

n

n

PAi

iiKVi



60/112

12


61/112

Power Delivery Systems, LectureNotes

Bach Quoc Khanh, Dept. of ElectricPower Systems, SEE, HUST 1



2.2. SS thaythay thth caca lili inin

3.3. TnhTnh tonton vv inin trongtrong cccc lili inin hh..

4.4. TnhTnh tonton vv inin trongtrong lili inin knkn nn

gingin

NI DUNGNI DUNG


62/112




ChngChng tata lmlm gg?? XcXc nhnh cccc thngthng ss chch caca hhthngthng cungcung cpcp inin vv tnhtnh tonton nhnh hnghng nn cccchh thngthng cungcung cpcp inin vv trongtrong thitthit kk..

TnhTnh tonton cici gg??

TnhTnh tonton inin pp titi cccc ntnt vv dngdng cngcng sutsut trntrn tttt cccccc nhnhnhnh caca ss cungcung cpcp inin..

TnhTnh tonton lala chnchn thitthit dindin dydy dndn vv cpcp..

KimKim tratra tntn thttht inin pp,, iuiu chnhchnh inin pp vv bb cngcng sutsutphnphn khngkhng trongtrong lili vv cccc bibi tonton khckhc..

SS thaythay thth hh thngthng vv ngng gigi cccc thngthng ss chch..

22.. SS thaythay thth caca liliinin22..11.. SS thaythay ththdydy dndn

ThngThng ss ngng dydy cc trngtrng chocho ququ trnhtrnh vtvt ll xyxyrara trongtrong dydy dndn khikhi cc inin pp tt lnln hochoc dngdng ininxoayxoay chiuchiu ii qua.qua.

PhtPht nngnng dodo hiuhiu ngng Joule:Joule: inin trtr

DngDng inin XCXC gygy nnnn tt trngtrng tt cmcm caca tngtng dydydndn vv hh cmcm giagia cccc dydy dndn vivi nhaunhau.. inin khngkhng

inin pp caocao pp gygy rara inin trngtrng lnln trntrn bb mtmt dydydndn ((hinhin tngtng ionion haha khngkhng khkh quanhquanh dydy dndn,, hinhintngtng vngvng quangquang)) gygy rara tntn haohao:: inin dndn

inin pp xoayxoay chiuchiu gygy nnnn inin trngtrng giagia cccc dydy dndnvivi nhaunhau vv vivi tt nhnh cccc bnbn tt inin: Dung: Dung dndn..


63/112




inin trtr

inin trtr mtmt chiuchiu (():):

inin trtr thaythay ii theotheo nhitnhit ::

inin trtr xoayxoay chiuchiu:: mtmt dngdng inin phnphn bb khngkhng uu dodohiuhiu ngng bb mtmt,, RxcRxc >> RdcRdc. . tntn ss 5050Hz,Hz, ss khckhc nhaunhaukhngkhng ngng kk (~(~11%)%) nunu coicoi Rxc~RdcRxc~Rdc

F

Rdc =

: in tr sut ca dy dn(.m)F: Thit din dy dn (m2)

)]t(t[1RR 00t +=

t0: Nhit thit k(20oC)

R0: in tr khi t0(): H s nhit ca in tr

inin khngkhng

0.779r

Dln102

r

D4ln1

8

L m4m0 =

+

=

00:: HH ss dndn tt caca vtvt liuliu chch toto dydy (4(4.10.10--44H/km)H/km)

r:r: BnBn knhknh ngoingoi caca dydy dndn (m)(m)DDmm:: KhongKhong cchcch trungtrung bnhbnh hnhhnh hchc giagia cccc dydy dndn(m)(m)

DDabab,, DDbcbc,, DDacac:: KhongKhong cchcch phapha vivi phapha

0.779r

Dln0.1213fL2X mL ==

(H/km)

(/km)

( )1/3acbcabm DDDD =

r

Dbc

a

b c

r

Dbc

cba

Dab

Dac

DDDm 26.123

==

DDm =


64/112



DungDung dndn

r

Dln18

10

r

Dln

2C

m

9

m

0

=

=

0: Khong cch khng gian ( F/m)r: Bn knh ngoi ca dy dn (m)Dm: Khong cch trung bnh hnh hc gia cc dy dn (GMD) (m)

fC2

1Xc

=(F/km) ; (/km)

90 1036

1

=

inin dndn

2

0

n

c

U

PG =Pc0: Sut tn tht vng quang (W/km)Un: in p nh mc (kV)

(1/km)


CcCc dngdng ss thaythay thth caca dydy dndn

MngMng 22 caca hnhhnh

HnhHnh

TngTng trtr: Z=: Z=R+jXR+jX=(r=(r00+jx+jx00).l).l TngTng dndn: Y=: Y=G+jBG+jB=(g=(g00+jb+jb00).l; (l:).l; (l: ChiuChiu didi, km), km)

HH thngthng phnphn phiphi ((ngnngn hnhn 8080km)km)

ngng dydy trntrn khngkhng hochoc cpcp UU2222kV, lkV, l55km: Dungkm: Dung dndn vvinin dndn cc thth bb quaqua.. SS thaythay thth bibi tngtng trtr nini tiptip..

ii vivi ngng dydy didi U>U>2222kV:kV: ChCh bb quaqua inin dndn..

R L

G2

G2

C2

C2


65/112



22.. SS thaythay thth caca liliinin22..11.. SS thaythay ththmymy binbin pp

SS thaythay thth caca mymy binbin pp

TngTng dndn mymy binbin pp (Z(ZTT))

SS thaythay thth

2

2

.r

rlT

S

UPR =

r

rI

r

ITT

S

Uu

I

uZX

2%.

==

RT XT

RcXm

ZT= RT+ jXT

S0

2

0

r

cI

PR

=

0I

UX r

m =

RT, XL: in tr v in khng vng dy

Rc: in tr do tn tht trong cc cun dyXm: in khng do t trngSr , Ur: Dung lng MBA v in pPI, P0: Tn tht c ti v khng tiuI: in p ngn mch (%)I0: Dng in khng ti (t trng)

rUjIPQjPS 00000 +=+=

MyMy binbin pp 33 cuncun dydy

SS thaythay thth

ZP

S0

ZS1

ZS2

)ZZ(ZZ

)ZZ(ZZ

)ZZ(ZZ

SPSSSPS

SPSSSPS

SSSPSPP

12122

22111

2121

2

12

12

1

+=

+=

+=

r

rSP

r

rSPSPSPSP

S

%.Uuj

S

.UPjXRZ

2

1

2

2

1111

+=+=

TngTng trtr cuncun dydy

RP-S1, XP-S1: Tng tr cun s cp th cp th 1Sr , Ur: Dung lng MBA v in pPI, uI : Tn tht c ti v in p c ti khi cun s cp v th

cp th 1 kt ni vi h thng. Cun th cp th 2 m.


66/112



33.. TnTn thtthtinin pp vv cngcng sutsut33..11.. TnTn thtthtinin pp

TnTn thttht inin pp trntrn ngng dydy

)Im()Re().(3 ZIjZIjXRIVVV LS +=+== &&&&

rL V

QXPR

V

QXPRXRIZIV +

+

=+= )sincos(3)Re(

R, X: Tng tr mt phaVr: in p dy (L-L)VS: in p ngun (L-L)VL: in p ph ti (L-L)I: Dng tiP, Q: cng sut ti 3 pha kW v kVar

PL+jQL

R+jX VLVS

33.. TnTn thtthtinin pp vv cngcng sutsut33..11.. TnTn thtthtinin pp

HH ss tntn thttht KKdd:: TnTn thttht inin pp phnphn trmtrm ((V%)V%) trntrnngng dydy tnhtnh vivi 11 kmkm ngng dydy vv cpcp chocho titi 33 phapha 11 kVAkVA..

KKdd TraTra cucu trongtrong ss taytay tratra cucu ((hh ss cngcng sutsut).).

)sincos(

100

100 2 XRVV

V

K rrd

+

=

kmkVA.

%

TnTn thttht inin pp trntrn ngng dydy ii vivi ngng dydynhiunhiu phph titi

( )=

+=

n

i

iiii

r

XQRPV

V1

1 RiXi: Tng tr trn on ng dy

th iVr: in p (L-L)Pi, Qi: Cng sut tc dng kW v phn

khng kVar chy trn onng dy th i.


67/112



3.3. TnTn thtthtinin pp vv cngcng sutsut3.1.3.1. TnTn thtthtinin pp

TnTn thttht inin pp ii vivi ngng dydy cc phph titi phnphn bbuuXc nh tn tht in p do cngsut tc dng gy trn on ngdy dx ti chiu di ng dy xt cui

Ngun

l

xdx

L / 2 L / 2

P = P0.l

rr

xxPx

V

dxrxP

V

dRPVd

....00

==

rr

l

r

PV

RP

V

lrP

V

dxxrPV

.2

.

.2

..... 2

00

0

00===

Tng tn tht in p do cng sut tc dng

Tng t,r

QV

XQV

.2

.=

r

QPV

XQRPVVV

.2

.. +=+=

TngTng thttht cngcng sutsut trntrn ngng dydy

R

V

SRIP

L

LL

=

2

2

3

3..3

XV

QPQ

r

LL

+=

2

22

PL+jQ

L

R+jX VLVS

R, X: Tng tr 1 phaVr: in p dyVS: in p ngunVL: in p tiIL: Dng in tiP, Q: Cng sut tc dung v

phn khng ca ph ti 3pha

RV

QPR

V

S

r

LL

L

L

+=

2

22

2

2

TnTn thttht cngcng sutsut tctc dngdng::

TnTn thttht cngcng sutsut phnphn khngkhng

33.. TnTn thtthtinin pp vv cngcng sutsut33..11.. TnTn thttht cngcng sutsut vvinin nngnng


68/112




TnTn thttht cngcng sutsut caca ngng dydy cc phph titi phnphn bbuu

MtMt phph titi II00(A/m),(A/m), chiuchiu didi l (m)l (m)

TnTn thttht cngcng sutsut trntrn vivi phnphn dxdx caca ngng dydy

dxrxIRIPd xxx ..)..(3..3)( 02

0

2==

TnTn thttht trntrn tonton tuyntuyn::

RIlrIdxxrIP

l

.......3 23

0

2

0

0

2

0

2

0 ===

PhnPhn bb titi trntrn lili

DngDng inin (( )) vv tngtng trtr ((Z=z0.l))

PhnPhn bb hnhhnh chch nhtnht ::

Ti phn b ti v tr 1/3 chiudi ng dy

=

2

3

13 TIZP

PhnPhn bb hnhhnh tamtam gicgic ::

r

T.V3

D.l.wI =

Ti phn b ti v tr 8/15 trongkhong cch t nh n dy catam gic.

=

2

15

83 TIZP


69/112



TnTn thttht cngcng sutsut trongtrong mymy binbin pp

TnTn thttht cngcng sutsut tctc dngdng vv phnphn khngkhng

I

r

PS

S

nPnP

+=

2

max0

1

r

IT

S

Su

n

SInQ

100

%1

100

% 2

max0 +

=

Sr : Dung lng my bin pSmax: Cng sut ti cc i ca trm bin p.PI, P0: Tn tht ngn mch v khng tiuI: in p ngn mch (in %)I0: Dng in khng ti (%)n: S my bin p trong trm (lm vic song song)


TnhTnh tonton tntn thttht inin nngnng

nhnh nghangha ((A)A) ::

=

T

dttPA0

)( P(t) :Tn tht cng sut ca li in

T: Khong thi gian trn th ph ti

TnTn thttht inin nngnng::

= maxPA Pmax: Tn tht cng sut cc i

: Thi gian tn tht cng sut ln nht



70/112



TnhTnh thithi giangian tntn thttht cngcng sutsut lnln nhtnht (())

SS dngdng biubiu phph titi cccc ii TTmmQuanQuan hh giagia vv TTmm

8760)10124.0( 24

+=

mT

==T

m dttPPP

AT

0maxmax

)(1

1 : th ph ti h thng2 : vng giao gia Pmaxv Tm

Tm: Tra trong s tay thit k.


TTP

A

P

PF avS

=

=

=

maxmax

Pav: Tn tht cng suttrung bnh

SS dngdng hh ss tntn thttht (Fs)(Fs)

TFS=

TnhTnh hh ss tntn thttht cngcng sutsut (Fs)(Fs)QuanQuan hh giagia FFSSvv FFLL

2)1( LLS FcFcF +=

FL: H s ph tic = 0.2 (Anh v c)c = 0.3 (M, th)c = 0.16 (M, nng nghip)

3.3. TnTn thtthtinin pp vv cngcng sutsut3.1.3.1. TnTn thttht cngcng sutsut vvinin nngnng

FL: Tra trong s tay thit k.


71/112



TnTn thttht inin nngnng caca ngng dydy

= .maxPA Pmax: Tn tht cng sut cc i: Thi gian tn tht cng sutln nht

TnTn thttht inin nngnng trongtrong trmtrm binbin pp

TFPS

S

nPnP

S

S

nTPnA sI

r

I

r

+=

+= ...

1....

1..

2

max0

2

max0

Sr : Cng sut ca my bin pSmax: Cng sut cc i ca trm.PI, P0:Tn tht c ti v khng tin : S lng my bin p trong trm (lm vic song song)T : Thi gian ng in my bin p (1 nm: 8760h)

3.3. TnTn thtthtinin pp vv cngcng sutsut3.1.3.1. TnTn thttht cngcng sutsut vvinin nngnng

TFP s..max=

V d 2. Xt trm bin p trung gian c 2 my bin p vi cc thng sSmB = 10MVA, cp in p 132/11kV. Tn tht khng ti 18kW v cti 60kW, in p ngn mch % l 10.5%, dng in khng ti % l0.9%. Xc nh tn tht cng sut v tn tht in nng ca trm binp vi ph ti 12+j7.2MVA, Tm=5000h/nm.

p n: My bin p lm vic song song

)(75.946010

2.712

2

1182..

1.

2

222

max0 kWP

S

S

nPnP I

r

=

++=

+=

)(1208 kVAr=

34116010

2.712

2

18760182...

1..

2

222

max0

++=

+=

I

r

PS

S

nTPnA

)(34118760)105000124.0(8760)10124.0( 2424 hT

m =+=+= x

)(5083854 kWh=

10.100

10)2.712(5.10

2

1

100

10109.02

.100

%1

100

%.

32232

max0 ++

=+=

r

IT

S

.Su.

n

.SInQ


72/112



cc imim lili inin hh LiLi inin cc mtmt ngunngun cpcp,, SS cc dngdng hnhhnh tiatia,, linlin thngthng ((phnphn nhnhnhnh)) hochoc hnhn

hphp..

SS liuliu banban uu

SS lili inin,, CcCc thngthng ss caca ngng dydy vv mymy binbin pp,, inin pp ngunngun UoUo

CngCng sutsut cccc ntnt phph titi.. NhimNhim vv tnhtnh tonton

DngDng inin vv cngcng sutsut chychy trntrn cccc nhnhnhnh TnTn thttht cngcng sutsut trntrn cccc nhnhnhnh TnTn thttht inin pp cccc nhnhnhnh vv inin pp cccc ntnt trntrn lili..

44.. TnhTnh tonton dngdng cngcng sutsut44..11.. ThitThit lplp bibi tonton

TnhTnh tonton lili inin khngkhng xtxt nn tngtng dndn ngng dydy ((lili phnphnphiphi inin))

CcCc gigi thitthit tnhtnh tonton:: SS thaythay thth chch xtxt thnhthnh phnphn inin trtr vv inin khngkhng ngng

dydy ((ngng dydy trntrn khngkhng trungtrung vv hh pp U


73/112


74/112



V d 4.

S thay th Dng cng sut v tn tht

trn cc nhnh

i j

2

Qj ij

iS& ijS

& '

ij

S&j

S&

2

Qj ij

ij

S&

ijZ

2

QjSS ijj

'ij =

&& 2rijij .UBQ =

ij'ijij SSS &&& += )j.X.(R

U

QP)j.X.(R

U

)S(S ijij2

r

2ij

2ij

ijij2r

2'ij

ij ++

=+=

&&

2

QjSS ijiji =

&&

Tn tht in p trn cc nhnh v in p ti cc nt

0

01010101

0

0101010101

U

.RQ.XPj

U

.XQ.RPU

+

+=&

0101 UUU &&& =

i

ijijijij

i

ijijijijij

U

.RQ.XPj

U

.XQ.RPU

+

+=&

ijij UUU &&& =

;

;

TnhTnh tonton vv inin trongtrong lili inin knkn nn gingin

44.. TnhTnh tonton dngdng cngcng sutsut44..22.. PhngPhng phpphp gngnngng

0

1 2

1S&

2S&

01S&

02S&

12S&

0.ZI.ZI.ZI 020212120101 =+ &&&

r

01

0

0101

U3

SU3

SI

=&

0.ZS.ZS.ZS 020212120101 =+

r

0202

U3SI

&

r

1212

U3

SI

&

Dng cng sut trn cc nhnh

0 1 2 001S& 02S

&12S

&

1S&

2S&

Trong ; ;

p dng lut Kirchhoff xc nh in p:

(1)


75/112



021201

0220212101ZZZ

ZS)ZZ(SS

++

++

=

&&

&021201

0111201202ZZZ

ZS)ZZ(SS

++

++

=

&&

&

20210112 SSSSS &&&&& +==

0SSS 11201 = &&&

0SSS 21202 =+ &&&

Tnh dngin theo Kirchhoff ti nt ph ti 1 v 2

44.. TnhTnh tonton dngdng cngcng sutsut44..22.. PhngPhng phpphp gngnngng

(2)

(3)

T (1), (2) v (3), ta c

;


76/112

1



2.2. CcCc hh nn vv dngdng trongtrong tnhtnh tontonngnngn mchmch

3.3. TnhTnh tonton ngnngn mchmch

NI DUNGNI DUNG


77/112


78/112

3


CcCc dngdng ngnngn mchmch::

NgnNgn mchmch cncn bngbng::

NgnNgn mchmch baba phapha hochocvivi cpcp (3(3))

NgnNgn mchmch khngkhng cncnbngbng::

HaiHai phapha (L(L--L)L)HaiHai phapha chmchm tt (2 LG)(2 LG)

MtMt phapha chmchm tt (SLG)(SLG)

Dng ngnmch

Xc xut xuthin

NM SLG 70%

NM L-L 15%

NM 2 LG 10%

NM 3 5%

XcXc xutxut xutxut hinhhinh cccchinhin tngtng ngnngn mchmch


NguynNguyn nhnnhn ngnngnmchmch::

LoLo haha cchcch ininhochoc tctc ngng nhitnhitlmlm hnghng cchcch inin

caca thitthit bb.. TcTc ngng cc khkh dodo

concon ngingi,, scsc vtvt,,gigi bobo..

StSt nhnh vovo hhthngthng inin..

ThaoThao tctc nhmnhm trongtrongvnvn hnhhnh hh thngthnginin

St nh

Cy

Hng thit b

ng vtGi

BiTai nn

Bng/tuyt

Tcng do xy dngPh hoi

Khc


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4


TcTc ngng::

MtMt nn nhnh hh thngthng inin,, gygy ss cc mtmt inin lanlan trntrn

GyGy nhiunhiu cccc ngng dydy linlin lclc

TcTc ngng nhitnhit:: toto rara xungxung lnglng nhitnhit ll ((thmthm chch hhquangquang)) ss tt nngnng vv phph hyhy cchcch inin

TcTc ngng cc hchc:: toto rara xungxung lclc inin ngng phph hyhy cccc ktktcucu cc khkh caca thitthit bb inin..

McMc chch caca tnhtnh tonton ngnngn mchmch::

LaLa chnchn vv kimkim tratra thitthit bb inin

ThitThit kk,, tnhtnh tonton chnhchnh nhnh cccc hh thngthng bobo vv rr lele

PhnPhn tchtch nhnh ngng

nhnh gigi chtcht lnglng inin nngnng..

22.. HH nn vv tngtngii ccbnbn

nhnh nghangha:: CcCc ii lnglng cc biubiu dindin bngbng trtr ss tngtngii cc bnbn

Gi tr thc (n v c tn)

i lng c bn c chn trong cng n vGi p.u. =

CcCc ii lnglng:: DngDng inin (I),(I), inin pp (V),(V), cngcng sutsut biubiukinkin (S)(S) vv tngtng trtr (Z)(Z) trongtrong hh thngthng baba phapha..

b

puV

VV =

b

puI

II =

b

puS

SS =

b

puZ

ZZ =;; ;; ;;

bbb VIS = 3b

bb

V

SI

=

3b

bb

S

VZ

2

=


80/112

5

2.2. HH nn vv tngtngii ccbnbn

MiMi linlin hh giagia cccc hh nn vv tngtng ii cc bnbn khckhcnhaunhau::

HH nn vv cc tntn::

V (V), I (A), S (VA), Z (Ohm).V (V), I (A), S (VA), Z (Ohm).

2'

2''

b

b

b

bpupu

V

V

S

SZZ =

:: HH nn vv cc

:: HH nn vv mimipuZ'

puZ

TiuTiu chunchun : IEC: IEC 6090960909

PhngPhng phpphp tnhtnh tontonngnngn mchmch::NgunNgun inin pp thaythay ththtt

titi vv trtr ngnngn mchmch..

33.. TnhTnh tonton ngnngn mchmch33..11.. TngTng quanquan chungchung

in p nh mc ca h thngVn

HH ss inin pp cctrong tnh ton

Dng ngn mch lnnht (cmax)

Dng ngn mchnh nht (cmin)

H p (100V n 1000V)Sai s +6%Sai s +10%

1.051.1

0.950.95

Trung p v cao p (1kV n550kV)

1.1 1


81/112

6

CcCc gigi thitthit

NgnNgn mchmch trongtrong hh thngthng cungcung cpcp inin..

BB quaqua bobo haha tt ((khikhi inin khngkhng caca phnphn tt ll hnghng ssvv mchmch inin ll tuyntuyn tnhtnh).).

BB quaqua nhnh hnghng caca cccc phph titi tnhtnh vv cccc phph titi ngng cccngcng sutsut nhnh..

BB quaqua tctc dngdng caca cccc thngthng ss cc trtr ss bb nhnh tngtng dndncaca ngng dydy,, mchmch tt haha mymy binbin pp,, inin trtr dydy qunqunmymy phtpht,, mymy binbin pp vv mtmt ss ngng dydy caocao pp..

HH thngthng scsc inin ngng baba phapha caca ngunngun ll ii xngxng..

33.. TnhTnh tonton ngnngn mchmch33..11.. CcCc gigithitthit

SS thaythay thth hh thngthng baba phapha

HH thngthng::

"

2

kQ

nQ

QS

UcZ

=

Hthng

Q

RS

XSQ

"kQS

nQU

: Cng sut ngn mch cnbng.

: Tng tr ca h thng

: H s in p (IEC 60 909-0)

QZ

"

kQS

c

QQ ZX = )35( kVVn >

QQ ZX = 995.0 )35( kVVn

33.. TnhTnh tonton ngnngn mchmch33..33.. TngTng trtrcccc thitthit bb


82/112

7

SS thaythay thth hh thngthng 33 phapha

ngng cc ngng bb::

''

dGG jXRZ +=

''12.0 dG XR =

i vi my pht h p.

''05.0 dG XR =

i vi my pht cao p (>1kV).

( )MVASrG 100

''7.0 dG XR = ( )MVASrG 100

he thong cung cap dien - slide tc

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