r
i
4'-
DAr
Hec
eu6c
crA
Tp HO cui MrNH
TRrIor.{c qAr
Hec
nAcn KHoA
HQr DONG
rUrgN
srNH
______000_
'
DE
rnl
MON
sAU
DAr Hec
NAvr
2oo7
Tuy6n
sinh:
tr
CAO
HeC
fl NCHTBN
CUU
SINH
to
gidy
thi khdc
nhau
DE
THI
SO: 02
Ciu l:
Cdu I M6y
bi€n 6p
3
pha
c6 c6ng
suAt
S
:
5600 KVA;
t1i s6
U,ruz:35000/66000
V; mriy
c6
c6c th6ng
so kirong
tti:
IsoA: 4,5,
P()
:
18,6
KW vi c6
c6c th6ng
pha
4l
DiQn 6p9r,
6 75%
tai
dinh
mftc, cos<p
:
0,8,
dong
diQn
snrn pha
5/ HiQu
su6t
q
% 6 tai dinh
mric,
cosq
:0,8,
ddng
diQn
ch6m pha
Ciu2:
"
Su,
'Sf
l,\
s0 oo
m?ng dlen
:
ll0l22 kV,
di6n
trd
RB
:2,2
ohm
,
cim
khdng
Xs:
30,7 ohm
(
Rs
,
Xe
qui
vA phia
cao 6p
),
APo
:
150 kW,
I0olo
:2o/o
.
-
Duons ddy
cdef
I IJd*
:
+
j2,67
MVA
(
tdng c6ng su6t
tdi
phdn
bO ACu
tr€n doan
de)
S
r
=3+
j2
MVA
- Di0n6pr
lJr:21
kVoPhstiif.
Hdy
tinh:
a)
EiQn
6p U" o
thanh
cdi
c
.
Ui
COng
26t-S"1
HiQu
suAt
tai diQn
cua
duong
ddy
110
kV,
he
s6
c6ng sudt d A
'
Cflu
3:
T1
T1
AY
__)_.
Cho
hQ thdng
diQn nhu
hinh
vE:
G-
M6y
ptrat
Aien 3
pha_ c6
c6ng
su6t
ccr
3
pha
co
c6ng
su6t
100
MVA;13,8
kV,khang
tro.si€u
qu6
dQ
x":0,2
dvtd,kh6ng
tro
thir
lU ngtritir
bing
Olt
dvtd;
khdng
tro
thri
tg khdng
bdng
0,10
dvtd;
kh6ng
trd
cu6n
a6t trucii6p;
Kh6ng
tro blng
0,01
dvtd.
L- Ooorrg
d6y
c6
kh6ng
tre
thf-tg
thuin bing
khang
trd
thti
tg nghlch
bdng
20 ohm,
khiing
tro
thri
tq khdng
ld 60
ohm.
86
qua
inh
hu&ng
cua
diQn
ti€p
v6i d6t t4i
nirt
4.Gia
thitlt
trucvc
luc
qr
"O
xay
ra,diQn
6p tai
m6y
ph6t la 1,05
dvtd.,b6
qua
ddng
diQn
phg
t6i.
Ciu
4:
ifiav
ph6t d6ng
bQ 3
pha
50Hz-
mey
A
vir m6y
ph6t lr€n
* aar
tinh
iai
(quan
hQ cria
t5".9Q
n
Jhe.o
c6nq
;ht
phe, wA-
dugc
xem
h
dudng
thing)
vdi
$0
d6c
kh6c
nhau.
Khi
ddng
kich
tir
cho
m.6i
may
ia
phin kh6ng
cung
cAp
cho
tei
boi
mdi m6y
ph6t?
b/
H9 sl6
c6ng
suAt
cua
tai?
I
-::
\1^A.
t)
l)
i
:_
ri
-7
3
ci
Cdn
diOu
chinh
ddng
kich
746
w),
50
Hz, 460v,
stato
ntii
a,
c6
ti s6
(kVA
khi
md
mey/HP):
5,6.
a/
Ddng m& mrly
lcm
nhat
md
b0
khoi
dQng
tr.uc ti6p (d€
m<r
m6y
d6ng
ccr) phai
ldm
vi6c
vdi?
""
f
c/
Khi
dung
b6
khcri
dQng
ki6u
t.u
bitin
rip
c6.
ti s6.
bi6n
rip
I
,25:l
O6
mO
iray
d6ng
co,
tinh
dong
mo
mdy
lcrn
nhdt
ch4y
SINH
Chuy6r+
ngdnh: fniSt
bi di6n nhd m6y di6n.
MOn thi:
Thdi
gian
lirm bAi :180
phrit.
ThiSinh kh6ng
sfidr,rngtai
ti6u.
Dd
thi
sd:
Luu
y
: Thf
sinh
lAm
c6c
phdn
A, B, C, D tr6n
cdc to
gidy
thi khdc
nhau
Ciu
1:
M6y biOn
So
d6
d6u ddy c6.d4ng
Y/A- 5. Hdy xdc
dinh:
1/
56
vong dAy so cAp vd
thri cAp,
uv: 6,8
V/vdng.
2lDdngdinh
mric scr cAp vi
thir cAp.
3/ HiQu su6t, bitit t6n th6t
sit 0,026
56,,,
giA
su
Rl:
R'2.
4lT\nth6t dinh
mirc
vd
hQ
s6 c6ng su6t
khi
ldm thi nghiOm
ngin mach"
5/Vd
0,13
ohm/km,
kh6ng
x6:0,36 ohm/km,
dung
d6n bo:2,4.10-6
ohm.km
-
Mdy bi6n
6p T
r
Sd*
:
40000
kVA
,
220/22
kV, diOn
tro Rs
:
2,2
ohm, cdm kh6ng
Xs: 30,7 ohm
(
Re
,
Xe
qui
v,i phia
cao 6p
-
Phu
tii
I P"
=
40lv[W
c
S",
-+
s/
hs
pa.
=
gMW/
(c6ng
su6t
tii
ph6n
b6
d€u
tr6n
doqn
de)
Pr
=6 MW
-,E-ign
rip
:
LJr
:2t
c6ng
su6t
S.1
phia
thanh
c6i
22
ky
:l ?le"
6p
Uu
tai
thanh
crii
b
.
o]
Pi?r
dp.Ue
rai
rhanh
crii
A .
e)
HiQu
suAt
tei
di0n
cta
Auorrg
ffi
il
ao-*,=zb?ffiu'n*
.ou
thri
tu
nghich
bdng
2,o/o:
r,h6nu11o
,rrn;"
ruro"Jia",
rci,,:
rniri,lj.glr.rr6ng
ntii
ddt
aeng
5%.
Fi3ii#i#'.:ifl**,uffi;1T*-*9;
.#"i,i"",
oor,rv,t
'i,,i'i,ii'rv,
to
e6u
ddy+am
S.a
htffit?#ffit
il;'i";;;;"b#
khring
trd
rheo
ccr
b6n
r00
MVA.
iii#;til.fsJ"Htrt
thf
ts
thu{n,
nghich,
kh6ng
cia
hQ
thting
tr€n
dti
tfnh
ng6n
m4ch
3
c/
Tinh
dong
ngin
mach
1
pha
t4i
2l%dgan
duong
stato
n5i
Y, c6.diQn khang
a61^g.b0.(pha)
Xdb:
1,5
ohms.,
vattentrd
da;-q;6"^pria";e
(pha).
Du3B
bi6n
tAn
Oe aieu
chinh
tOCaO
eOng co
tir 300
d6n
1000
vdng/ phrit.
Hdy
x6c
dinh
c6c
y6u
cAu sau:
Q
r-'
a/ Ph4m
ddng
diQn
stator
d
cn6
AO
dinh mric.
,d/
Tinh
gi6
tri sric diQn
dOrlg
Eo khi
d6ng
co li.rn vi6c
o t6c
d6
300 vdne/phtr.
e/
Khi cho
ring
9le1
ap
cAp
cho
ddng
co
ti le thuan
v6
tAn
dQ
d6ng
bQ cria
dQng
co.
TSSEII.BO2
DA.r Hec
eu6c
cIA
rP.
HO
ciri
MINH
rnuiiNc
EAr sQc BAcn
KHOA
Hqr DoNG
rurEN srNH
sDH
nt
rnr rrrynN
srNH cAo
Hec
NAnn 2010
chuy€n
nganh , .TLait. n'
' |!t*oq.
.rA t-); df
.
.
6p 3
pha
A-Y-11, 40 kVA,
10000Vi400V, 50
Hz,
t6n hao khdng
tii Po
:
0,195 kW, ddng khdng
titilso6:4
(ddng
kh6ng
tni
bAng
4Yo
dingtllnh mrlc),
t6n hao ngin m4ch
Pn*
:
1,1 kW, diQn
6p ng6n m4ch
IJn
Vo
:
4,5)
gi6
fri bi€n
t16
c6m img tir trong
16i thdp B.n
c{
DiQn 6p tr€n m6i vdng
dAy uupn*
$ing
diQn. 6p
di.nh
mric cria ddy
quiin
chia cho
s6
vdng ddy),
s6
vong d6y so cdp W1 vd
thri
cdpW2,
cho bitit ti6t
diQn
l6i th6p A1: 65,4
crrf .
d/
Eign
trd
ddy
qu6n
so
c6p R1, cho bitit chi6u dni trung
binh I vdng
ddy
\:A,567
m, tiiit diQn
10 MVA,
0,8 tr6, 501fr2,2 crqc, n5i
Y, c6
di$n kh6ng
ddng bQ )fu6
:
12
Qlphavi
diQn tr& ddy
quAn phan
rmg R*
:
1,5
C)
/pha. M6y cl6ng
bQ
tr6n ldm viQc voi
ludi
ctiQn vd ctng lcm.
a/ Sftc diQn
dQng E0 khi
mdy lim viQc
vdi tai dinh mric?
b/ G6c tai 0
(g6c
l$ch
pha gita
E6o6u
vd Upr,J
l5hi
cinm6y?
Mdy ti€u
thlr hay
phrit
ra
cdng
su6t
phan
khang
khi d6?
VC
gi6n
d6
vecto
cho th6y hqat
dqng
cinmity
trong
tinh f4ng niy?
Ghi
chri
:
Trane.f
tl
a
.'!l
Cho
mang
ttign nhu
hinh vE
tfvtd.
.
Gr,MAy
pt6t
,
c6ng
su6t
10 MVA,
diQn
6p dAu cuc 1lkv,
khane
tro thrl
qu
thufn
vd nghich
bdng
nhau bing
0,15
dwd, khdng
tr&
thri
t.u kh6ng
bing 0,10 ilvtd.
Trung
tinh
mriy
phrit
G2
n6i
d6t
xr
=
x2
=
I +
ja
(O)
;
t6ng tro
thri t.u
khdng
bing : xo=
2+
j8
(O).
Hay:
a-Thdnh l4p
so
dO thl
t.u
thu{n,
nghich
vd
ktr6ng cho mang
diQn tr6n,Tfnh
so d6 tucrng rlucrng
Thevenin
thi tW
thuAn,
nghich,khdng
TSSDH-B02
- Duong
d6y
ABr IJd,n: 22AkY,
dei 120
lcn,
d6y d5n
c6 dign tro
ry:0,I2
ohm,{km,
cdm
kh6ng xs:0,45
ohm.4cm,
dung ddn bo:2,8.10-6
Biri
3;
Cho s<r
<16 m4ng
dign :
A
Bii 4:
,'1 (^*,
- Phu
tAi B:
80
MW,
hQ
sO c6ng
srlSt
cosg: 0,8,tr6
va
phin
khdng trOn t6ng tro
cira
rtudng ddy
.
d) Cdng
su6t
,s,
,
hQ stl c6ng
suAt elAu A cfia
duong ddy,
higu
su6t
tai dign
.
e)
DiQn
6p
<IAu B ltc
khdng tii
.
Ghi chri :
Trang.2,^.
TSSEH-BO2
DAI
HQC
QUOC
GIA
Eucm*
Cdy AB:
Uc.:
110
kV, dai
50 km, ddy
ddn
c6 rtiQn
trO
re: 0,19
ohm/km,
cim
kh6ng xs:0,45
ohm/km,
dung
d5n
bs
=
3,1.10-6
1
-
\Aaf-bigq-gp-T
I
Sd*= 40000
kVA
,
l10l22kV,
diQn
tr6 RB
=
cose:
0,8
tr6
-
Ei€n 6p
s_.le :
Uc
:21
kV
d
phU
tAi C .
Hdy tinh
:
a)
DiQn 5p
Ur
0
thanh
crii B
b) T6n thdt
cOng
sudt
tdc dung
vd
phdn
khdng
trong
ddy
qu6n
ddy
.
c)
d)
e)
Ghi chir :
Trang.fi.(.
t._
TSSETT-BO2
EAr
Hec
euoc
ctA
TP. l-lo
cui MINH
TriltoNG
DAr
Hqc
eAcH
KHoA
gel
oONc
rwBN
sINH
sDH
oOo
EE THI SAU
DAI
HQC
NAtvl
100MVA
e
13.8KV
5
Xr=X"=O.fS
I
Xz
=
0,17
-=L-
-Y
-T
t\
J-tr
;
IVA
138r(\/
0.1
OOMV
t-LlLi
(=O
N
101
3.8KV-
X
1
lOOMVA
138KV-Y/13.BKV-A
X=0.1
Xo
nOi eat trpc
tii5p. Di6m
trung tinh ctra dQng ccr dugc
n6i ddt
qua
diQn tr&
kh6ng
Xn:
0.05 theo don vi
tuong d6i.
a) Ve scy dO ttray th6 tht tp thu{n
,
thri
t1r nghich
vd
thri t.u
kh6ng vdi
gi6
trf co
b6n li
100MVA, 13.8 kV trong virng m6y
ph6t,
b)
Eua m4ng
thri tg vii
mpch thevenin tucrng duong khi
nhin tu
nrit 2.
Cho
bitit
QUOC
GIA
TP.
FIO
CHi M[].lil
TR.tloNG
EA.I
HqC
gACll
I'iE{oA
HQI
DONG
TUYEN
SINH
SEH
oOo
un
rnr
sAU
EAI
HgC
NAtvt
2009
[]
xcmtN cw srNH
Mdn Thi
: . . .
\[.6.1t
C 'llr:a.<A't:r*tZ7S. . . i . . .
:
r':ftsryt
f/.i
3. DQng
cokh6ng
ct$ng
b0
c6
c6c
s6liQu
sau:
3
pha;
50 Hz;
L-220
V- 11 A;
Y
-
380
V- 6,4
A;
1455
vong/Ph0t;
cos
g
:
0.80
a) DQng
co
dugc
"ap
stato?
.j
po
tru$
dinL
mftc
o/o?
d-)Khi
thft
nghiQm
khdng
tai 6
910nrpdinh
mrig
co
dusc
c6c sd
liEu
do:
-'cdng suAtiieu
thu:
Pa
:260
{v-:= _
;;
:
'
l
-
dong
crA
Tp.
no
cui
MrNH
rty^gIq.?,fr
Hg_c
nAfir
KrroA
HQI
EONG
TLIYEN
SINH
SDH
oOo
TSSE}I.ts02
I
DE
THI,
SAU
DAI
HQC
NAM
2009
I xcrutN
crru
srNrr
i
@.y^t:f
,lo_*,t,q*::
mang
tai
dinh
mrrc
& 2
tru#g
hgp:
cosrp
2
:
r,1vi
cosg2
:
0,3
?
b) Tfnh
ddng
dlnh
mric
d6y quAn
thf
c6p
I2dm
?
c)
cho
bi€t
crlc
t6n
thAt
6p roi phia
dfly quan
thu
c6p-
khi phs
t6i
dinh.mi:
l1n
vigc
o cos
92
=,
a,6
dtitrh
cd"m)
ln
3,5o/o
cua,diQn
6q
Ait"*t
muc
U2dm (U2din-:
24
v).Tinir
Xs,
id
t6ne
tii€n
khrine
tan
duqc
phep
s0
dqng
titi
li6u.
I
L
tl
t'toY
,ir\
v
,/
,1\
1.
May
Oidn
dp
phAn
phdi3
pha,20
kVA,4600/230
V,50
Hz,
c6 cdc
so
tieu
thrS
nghiem
sau:
=
230
Y,
lo
=3,5
A,
Po
=
152
W'
Thit
ngdn
mach:
dirOn
dp
ha
thdp
duqc
dua
vAo
phfa
cao
dp,
phia
h4 ap
duqc
ngSn
m4ch,
sau
d6
bidn
6P
b.
Tinh cdc
ddng
dinh
mfc
phia
cao
6p
vir
h4
6p'
2.May
phdt
dien
ddng
b0
3
pha,
c\Ic
trl dn,
50
H2,60
MVA,
13.2
kV
,
day
qudn
ldr
x66
=
3.4b5
O
.
Khi
c6ng
sudt
ra cOa
dQng
co
so
cdp
lir
50
MW,
ddng
kich
trj iy1
co
giS,tri
1000
A,
h6 s6
c6ng
sudt
bdy
gio
cosrp
dinh
mrjc
ls67nvdv6
mach
di6n
tudng
dUong
cho
mdy
phat
ndivdi
hjdi
di13n
b.
Khi
c6ng
sudt
tr6n
r6to
cfia
dong
co so
cdp
v5n
la 50
MW,
t(nh
dong
kich
tr-t cltc
khOng
ddng
bO
3
pha,30
0OO
HP
(
1
11p
=
746 W
),
13,2
kV,60
Hz, kidu
giAi nhi6t
bhng
nrJdc-khong
khi,
k6o
mot
mdy
n6n
turbine
tqi
mot
nhir
mdy
sAn
khf'
Ddngcoc6hi6usudtldinhmtrc)'tamoc=98'1%'hes6c6ngsudtldinhmfc)costp66=
o;90.Momentmdm6y(trUctidp)Mnm=O'TxMoment-dinhmrlcM6'n'Dongstatomdmdy
(
trLJc
tiSp
)
lmm
=
4,9xDdng
stato
dinh
mtlc
166.
Cho
biSt
hi6u
sudt
c0a
hdp
sd
trong
didu
ki6n
ldm
vi6c
dinh
mfc
ld
qamUS
c6ng
sudt
luc d6ng
cd
k6o
tAi
dinh
mrlc,
Tdn
thdt c6ng
sudt
trong
dAy
qudn
r6to
ndu
Uidt
tdn
thdt
do
ma
sdt
vd
qu4t
gio
la
62
kW
c.
Moment
oE
rnl
KirHUAr
DIEN
2
Thdi
gian
titm
bdi;90
phtit.
sinh
vi€'n
duqc
phep
s(t
dqng
tai
li6u.
1.
DOng
cd
m6t
chidu
kich
tr1 song
song
c6 cdc
s6
tiCu
dinh
qudn
phdn
rlng
la
rU= 0'8
O
'
Di€n
trd dAy
qudn
kich
ttl lir
rkt=
147
tl
'
86
qua
hien
tr;qng
phAn
rlng
phdn
rlng.
T6n
hao
kh6ng
tai
(
bao
'l
.
'
b.
Tinh
dong
phdn
ung
dinh
muc
/ddm.
c.
Tinh
diQn
trd
m6
iay
n*,
mdc
noi
tiSp'tren
mach
phdn
rlng
sao
cho
khi
m6
mdy'
dong
song
song
vdi
[Jdi
di6n
phan
ph6i
v6
currg
ldn
c6
di6n
ep
(day) 13,2
kV' Di6n
khang
ddng
bO
coa
mdy
phdt
d6ng
bg
la
(
1,2
p.u
)
xdb
=
gid
cosrP
=
1,6.
a.
Tinh
dong
di6n
phdn 0ng
dlnh
mtlc
ludm
va
v6
mach
di6n
tddng
dudng
cho
mdy
phdt
n6i
vdi
ltjdi
di6n
b.
Khi
c6ng
sudt
tr6n
fng
/r/tudng
ung
vdi
didu
ki6n
ldm
vi6c
cau
b/
3.
Uay
biSn
6p
phAn
phdi
3
pha,
20
kVA,
4600/
230
V, 50
Hz,
c6
cdc
sd
tieu
th& nghi6m
sau
ti6u
thu'
IJo
=
2go
V,
lo
=
3,5
A,
Po
=
152
W.
Thit
ngdn
m4ch:dign
dp
ha
thdp
dr;qc
d.ta
vdo
phia
cao
dp,
phia
hq
ap
dugc
thdng
sd
c0a
mdY
biSn
AP
b.
Tinh
c6c
ddng
dinh
mdc
phia
cao
Ap
vd h4
dp'
4.
OEng
cd
khong
ddng
bO
3
pha,30
000
HP
(
1
y1p
mttc
1792,8vlphut,
sau
do
qua
trung
gian m6t
h6p
s6,
tdc
d6
niry
duQc
tdng
thAnh
4930
v/phut
vir
k6o
mdy
n6n.
Dong
co
co
hi6u
sudt
l
dinh
mfc
)
trLtc
tiSp
)
=
4,9
Dong
stato
dinh
mfc'
Tinh
:
a.DdngstStooinnmtc,Momentdinhmtrc(tr6ntrr;cd6ngcd),Dongstatom6m6y,
Moment
m6
m6Y
b.
Tdng
t6n
thdt
c6ng
sudt
tric
d6ng
co
k6o
tai
dinh
mrjc,
Tdn
thdt
r+b"
qucjc
cIA
rP.
Hd
crfr tvtINH
TRUC'NG
DAr
HOc
nAcs
KH0A
Hot oor{i
ruv€N
sINH
sDH
^'
DE
THI
SAU
DAI
IrgC
NANI
2002
Tuydn
sinh
:
cAo
HQC
n
,
Dd thi sd: .
Ciul:
Mriy
bidn
aip
phdn
pfrdi
a
pha,
100
kVA,
Yo /Yo,50
Hz,
Oien
ep
(day)
so
cdp
15
kV.
Mach
ttr cira
mdy bidn
dp
c6
Xndi
luOng
320 kg, lam
bing
cdc
kV,
di€n
ap
(day)
thf
cdp
do
du0c
la
231
V'
-
ngan
mach
: di€n
ap
(day) so
cdp la
600
V,
cdng
suettidu
thu
le
1750
W,
dong
thrl
cdp
la 250
gi{
tri
di6n
trd ng6n
mach
Rnr
vA
di€n khdng
ngan
mach
Xnr
,
nhin
trr
phia
thri cdp.
d1 Miiy
bidn
rip cung cdp
c0ng
sudt'dinh
mdc
cho t&i co
tinh
cAm
c6 hd
sd
cOng
suAt
cos<p
+Xn6.12.sing2
vdi
:
Rn,n
,
Xn*
ldn
luOt
ld
didn tr3
ngin
mach
vd
di€n khdng
ngin mach
,
nhin
trl
phfa
thti cdp.
CAu
2 : DQng
cd
mot chi€*u
kich
trl
doc
ldp
,
c6
di6n trd
phdn
dng
Ru
=
0,3fL
Khi
tam thi
nghi6m
kh6ng
tai
(
may
lirm vi€c
d
chd
d6
m6y
phtit
):
Uo
=
308
V,
is1=
'1,5
A v;i
tdc
d0 n
=
d6ng
co
):
cdng
suet
ti6u
thu
ugi
pndn
d'ng po
=
b2ow,
U
=
250
v.
Trong
sudtOai
todn,
ludn
gi0di6n
dp
U
=
250
V,
irt=
1,5
A.
a/
hao'khdc.
Suy
ra
moment
khdng
tAi
(ma
sdt, quat
gi6,
do
tdn
hao
s[t;
mo.
Sau
ddy,
mo
dudc
xem
khdng
phu
thuOc
vdo
t6c
d0.
b/
Tinh
cdc
gid
tri
dong
phdn
ring
Iu.
d/ Tinh
cdc gid
tri
stlc
di6n
dong
cAm
ring,
tdc
dd,
moment
di6n
tr],
moment
tr6n
trUc
mdy
trong
didu
ki6fl
l,-i
-
20
A.
Bd
qua
t6c
do
dinh
mfc
n6.
=
2s0
vong/phrit,
ddng
phdn
fng
dinh
mrrc
lu
-
200
A,
cosp66
=
0,87
tr6.
Dien
trd
dAy
qudn
stato
(pha)
Ru
=
0,02
iso
lro i.o
leo
100
Eo
o
lroso
jzroo
slso
I
4200
s2oo
jseso
l6sso
izooo
lzeoo
7500
vdi
is1
:
dong
kich
tr],
Eo
:
sric
di6n
d6ng (gid
tri
di€n
OCii
cUc
4
47.o,."n
2
l/?/4A4//'{./
r
(
ue*i"L&rl*,.4nA
)
br,di€n
khdng
ddng
bo
x*ffi
dcii trong
cdc
cdu sau
.
cl stic
di€n
d6ng
(day)
khdng
tei
Eo
,
khi tu inOng cuc dai
dLJdi
1 crjc
Ciu
4 :
OQng co
khdng
ddng bO
3
pha,
4 cuc,
stato
ndi Y,
dUOc
cung cdp
di6n
dp
U
(gi{i
tri
di€n
ap dey)
co tdn sd
f tnay Odi OuOc
(trJ
bO bi6n
tdn). Sd vong ddy 1
pha
ddy
qudn
stato ld
Wpn
=
quay
n
c0a dOng
co trong di€'u
ki€n
khdng tai,
6 f
=
50Hz
vd f
=
25Hz .
b/ Khi
U
=
400V
,
f
=
50H2,
tinh tt)
th6ng cuc dai ou
dtrdi
m6i
cuc td .
c/
chtlng
minh
bidu thr-ic
tinh Moment
=
50H2, tinh
11p khi dQng
cd kdo
tAi co
hqc c6
moment
cAn 20
N.m .
r
oE
rHl
mAy
olEr,t
-
rHtfi sl slEN
(
07 2000
)
Thdi
gian
ldm
bdi : 90
ph0t.
sinh
vi€n
dugc
phep
sfr
dung
70
kW,
ddng
stator
/s
=
78
A, tdc
d0
roto
nr=1763
v/
ph,
tdn
hao
sfit
pFe
=
2 kw,
tdn hao
do
ma
siit
va
quat gi6
pcd=
1,2 kw,
di6n tr6
do duoc
gita2
d/ hiQu su0t
1
0,5 d
)
e/
moment
tr6n truc
may
(
0,5 d
)
,
2. Dong coddng
b03
pha,
stato
ndiY,4000
Hp
(
1
Hp= 746W),6600V,60
Hz,
diQn khang ddng
b0 xdb
=
11 al
pha
,
200 v/ph,
lam viQc
(
0,5 d
)
e/g6ctai
p(1d)
3.
DOng
co
1
chidu kfch
tit
song
song,
b0 HP
(
1 Hp
=746
w
),240
v,
650
v/ph,
khi
lim vi0c 6 tAi dinh
muc, ti0u
thp
dong
dien
173
A
cdn l
70
%
giii
tri
dong
dinh muc. T[nh,
trong
didu ki6n lAm
viQc
gi6m
tii
n6i trOn
:
a/ s0c
diQn dQng cAm
ung
(
1
d
)
b/t0cd0
quay(1d)
c/ ddng tiOu thu
tr6n ludi
diQn
(
1
d
)
d0
ddng
bO
la 1200
v/
ph,
tieu thu
tu lrl6i
diQn
c0ng
slt 80 kW.
Tdn
hao
ddng va
tdn hao
sdt trong
stator la
5 kW.
DQng
co k6o
tii
quay
v6i
tdc
Og
1
152 v/ph.
Tfnh
:
a/
b0
3
pha,
stato
ndi Y,
3980
V, dien
khang
ddng
b0 xdb
=
22
o/
pha,
co suc
dign
dOng Eo
(pha
)=
1790 V khi
dong
kich tu
ikt=25
A,
goc
tii
khi
do ti d=
300.
a/ VE
qudn
phdn
nng li Rrl=
0,8
C) .
Dien
trd
ddy
qudn
kfch
tu ta
Rkt= 147
a .
Bd
qua
hien
illdng
phdn
1ng
phdn
hng.
Tdn
hao khOng
tii
(
bao
gdm
tdn
hao
s[t va
tidp
ir€n m4ch
phdn
ung
sao cho
khi
m0 may,
dong m0 miiy
trong
phdn
ung tumm
=
1,3
l[dm.
P
F
g€
rnl
mOru
nrtAy
olEt't
(
o2.2ooo
)
sinh vi6n
duqc
phep
st dqng tdi li6u.
Thoi
gian
Di6n trd
dAy
qudn
phdn
fng
ry=
0,0705 A
vd
di6n tr6
dAy
qudn
kich t0
song
song rkr
=
81 e
. Khi tai
cd
hoc
tr6n
trqc
mdy
giim,
dong
ti6u thu
tf ludi
c0ng
giAm
theo
vd
1
d
2. D6ng
cd
kh6ng
d6ng bO
3
pha,
220V,50
Hz, 1OO
Hp
(1
Hp=
746W],0.0",
dAyquan
stato
n6i
A. Khi
d6ng
co ldm
vi6c
d tai
dinh
mrlc,
hi6u sudt
17
=
g1
"/o,
ddng
di6n
ti6u thu
b6i
d6ng
co
(
0,5
d
)
b.
tdng
cdc tdn
hao
c6ng sudt
(
0,5 d
)
c. c6ng
sudt di6n
tr]
(
0,5
d
)
d. tdc
d6
quay
c0a r6to
(
0,S
stato ndi
y,
di6n
khdng
ddng
bo
xdb
=
1,46
Q/pha,
dttoc ndi vdi
ltJdi
di6n
v6
cing ldn.
G6c tAi
e h 2So
khi
m6y
cung
cdp
c6ng
sudt
t5c
dung 112
KW
cho ltJdi
di6n,
tinh :
a. moment
sudt tdc
dung,
c6ng
sudt
phAn
khaing
may
phdt
cung
cdp cho h]di di6n
(
1 d
)
d. h6 sd c6ng
sudt
(
1
d
)
Bd
qua
cAc tdn
hao
trong
mAy
vd
xem
mdy
nhtl
co r6to
td dn, c6
cdc sd
tieu dinh
mrrc
: 2500
HP(1
HP=
746 W),
6600
v, 50 Hz,
2
cuc,stato
ndi
Y, ldm vi6c k6o
tai co
hgc
nhdt dinh,
khi d6
g6c
tai 0
=
28.50,
srlc
di6n d6ng
khOng
tai Eo
=
4500
V/pha. Di6n
khdng
94,3%
(1didm
)
c/ hQ s6
c6ng sudt
cosg
(
0,5
didm
)
d/ moment
dien
ti(
cuc
dai
(
0,5
didm
)
86
qua
diQn
trd ddy
qudn
phdn
tng
vd cdc tdn
hao do
ma sdt,
qu7t
11
=
248 A.
Cdc
tdn hao sdt,
tdn
hao ddng
ddy
qudn
stato,
tdn hao
ddng dAy
qudn
r6to ldn
lugt
ta 1697
W,
2803 W,
vdr 1549
W.
Tinh, trong
didu
ki6n
tAidinh
mgc n6itrdn:
a.
cOng
sudt di€n
ti6u
thu b6i
tdn hao
phu
)(
1,0 d
)
3. Ddng
co
1 chidu
kich tiJ song
song
c6 cdc
sd
lieu sau:
di6n dp
dinh
mfc Uo^=220
V,di6n trd dAy
qudn
phdn
rlng
rrt
=
0,4
e, dong
ti6u thu
dinh
muc
lo,
=
52
(1
didm
)
b/
tdc d0
l0c tAi dinh
mfc
(1
didm
)
c/
c6ng
suat dien
til
vA moment
di6n
trr lf c
tAi dinh
mUc
(1
didm
)
C6 thd
bA
qua
dong
di€n
ti6u
thg cha
d6ng co
sd
lier-,
d+nh
mdc
:2500Hp (
1Hp=746W),6600
V,
50
Hz,2
cUc,statondiy,
lam
vi6c
keo
tdi
co
hoc
nhdt
drnh,
khi
do
qoc
tai
e
=
28.5u,
stlc
di€n
dOng
khOng
tai
moment
tr€n
truc
c6ng
tac
cira
h€
truyan
co,
cho
bi6t
hie,.,
sudt
truydn
cd
hoc
ld
n"o
-
94,32
(
1
di6m
)
c/
he
sd
c6ng
suAt
cosq(
si6.
(
p299)
2.
DQng
cokh6_ngddngbO:
pha
40
Hp(
1Hp
=
j46W
),.50
Hz,
460
v,
4
cr]c,
day
qudn
stato
n6i
y,
khi
lamvi6c
voi
tai
nhdt
dlnh,
c6
dOnq
cd
(
tinh
bangr
ohms
)
:
Ir=
0,1478,
r'2=
O,11OO,
rn
=2L2,73
Xr=
0,7273,
x'2=
O,'7248,
Xn
=2I,2J
r'uu
!
7d'
r.'2
,
x'2
7an
1aa!
ra.c6.c
di€n
song
song.
Tinh
,
d di6u
ki6n
tdi
noi
tr€n:
a/
tdng
trd
nhin
vao
dOng
co
(
O,
5
di6m
)
b/
dongr
dien
ddy
(0,
5
di6m
)
c/
di6m
)
(
p219
)
3- DQnq
co
1
chidu
kich
trr
song
song
co
czic
sd
1i6u
sau:
diet
6p
drnh
mrJc
U6,n
=
220
V,
di€n
tr-O
Oay
qudq
1a
oo
=
1100
v/ph
Tlnh
:
a/
silc
dien
dOng.
phan
rrngr
luc
tdi
drnh
mric
(1
di6m
)
b/
L6c
d0
luc
tdi
drnh
mr-?c
(1
didm
)
,{o
.R
eAt
rAp
rcEu rnl
mOn rirnuAr olEr,r
(
2e.08.2001)
'1.
Ddng
co khong
ddng bd roto ldng
s6c c6 Pdm
=
20 kW,
Udm= 380 V,
ddu
y,
ndm
=
88%, ndm
=
970 v/ph. Bidt ring:
lmm/ldm
=
4,5
i
Mmm/Mdm
=1,2
;
150 kW,
nha mdy
dDng 1 d6ng
co ddng b6. H6i
cOng
sudt S
c0a
d6ng cd ddng b0 d6 la bao nhi6u kVA
dd
k6o
drJdc tAi
d6ng hlc n6i tr6n,
ddng thdi
nAng
cosg c0a nha mdy 16n 0,9.
Cho biSt hi6u sudt c0a'dOng
cd ddng
bQ
la 11
=
0,87.
3. Mdy
bidn dp 3
pha
c6 cdc sd li6u
sau
:
Sdm
=
5600
zo,
ro,
xo
blcdc thOng
s6lric
ngdn m4ch
znm, rnm, xnm
4. DOng
cd dien 1
chidu
kich tit song
song, c6ng sudt dinh mrlc Pdm
=
5,5 kW,
Udm
=
110
kw, ldm
=
58
A,
ndm
=
1470 vlph. Di6n trd
ddy
qudn phdn
fng ru
=
0,15 o
,
ddng
b6
r6to ldng
s6c c6 Pdm
=
20 kW,
Udm= 380 V,
ddu Y,
qdm
=
88%, ndm
=970v/ph.
Bidtring:lmm/ldm
=4,5;MmmiMdm
=1,2
i
Mmax/Mdm
=
1,8.
Tinh :
a/ ldm, lmm,
sdm
b/ Mdm, Mmm,
Mmax vd tdng tdn hao trong
ddng cd khi ldm
vi6c dinh
mfc.
2. Tdng
cdng sudt tdc dqrng cOa m6t nhd
mdy ld P1
=
e,g7.
3. May
biSn dp 3
pha
co
cdc sd li6u
sau
:
Sdm
=
5600 kVA,
U1iU2
=
35000/6600 V,
t1/12
=
92,51490 A,tdn hao
khdng
tAi
po=
18,5 kW,
dong
kh6ng
tAi lo= 4,5"/o,
di6n
6p
ngdn
mach
unrn
qudn phdn
rlng ru
=
0,15 e
,
di6n trd m4ch
kich tii rkt
=
1
37Q
,
di6n 5p
rdi tren cdc chdi
than
AU
=
2 Y . Tinh
srrc di6n ddng
phdn
rtng,
dong
phdn
dng vi moment
di6n trl .
r!,
oE rnr ri
rnuAr olEru z
Thdi
gian
ldm
hiQn
tUQng
phAn
fing
phAn
Ung.
Tdn hao kh6ng tAi
(
bao
gdm
tdn hao
sdt vir tdn thdt
cOng
sudt
co
hgc
)
ldr 653 W vd
kh6ng
thay ddi
theo t6c d6
quay
c0a
rOto.
a. Tinh moment
dinh mrlc M6p.
b.
Tinh dong
phdn
rlng dinh mtJc lu6m.
ldm vi6c song song
voi ltloi
di6n
phAn phdi
vd c0ng ldn c6 di6n ep
(day)
13,2
kV.
Di6n kh6ng
ddng b0 c0a
mdy
phdt
ddng
bd
ld x66
=
3.485 O .
Khi
cdng sudt
ra
ctja ddng
co so
cdp lA 50
MW, dong
kich trJ ip1 co
giA
tri 1000 A, h6
sd
c6ng sudt bdy
gio
tudng dUdng
cho m6y
phat
ndi
vdi
ludi di€n
b.
Khi c6ng sudt
tr6n r6to
c0a d6ng co
so cdp vAn ld 50 MW, tinh ddng kich ttl
cr/c
tidu iktmin
,
khi
d6
xAy
ra hi6n tuqng mdt
0dng
bd
cOa mAy ?
c. Tinh ddng
phdn
rlng
/atrJdng rlng
vdi
didu ki6n
lAm vi6c
cAu b/
3.
trung
gian
mdt h6p s6, toc
dd ndy
dugc tdng
thdnh
4930 v/phrit vA k6o m6y n6n khi.
D6ng co c6
hi6u sudt
1
dinh mfc
)
,tamOC
=
98,1"/",
he sd c6ng sudt
1
dinh mrjc
)
cosrp6^
=
0,90. Moment
m6 mdy
(
trr;c ti6p
)
Mn1,
=
O,TxMoment dinh mOc M6p, Dong
stato
d6ng
cd
k6o tai dinh mrlc, Tdn thdt cOng sudt trong
dAy
qudn
r6to ndu bidt tdn that do ma sAt vd
quat
gi6
lir 62
kW
c. Moment
ngay
tai
truc
vAo c0a mdy n6n khi
lr
DE
THt
H9C Kt
MON Kt THUAT D|FN
(
09.2001)
Thoi
gian
: 90
phrit.
SV drlsc
ph6p
srl
dgng
dinh m0c
Udm
=
380 V, tdn s6
50
Hz,
ddu Y, 6
crlc,
hO
sd c6ng sudt dinh mlrc
cosgdm
=
0,88, tdc dO
dinh muc ndm
=
980 v/ph.
(Tdn
hao
ddng
+ tdn hao
sdt statol ld2,2kw,
tdn hao
cd
(do
ma
sdt,
quat
gi6 )
la 1,1 kW,
khi d6ng
sd dong di6n r6to f2
(1d)
2. Miry
phdt
di6n ddng
bd cung
cdp di6n
cho
hd ti6u thu
m6t c6ng sudt S
=
2500+j3000
kVA,
6
di6n
6p 6,3
kV.
a/ Tinh tdng tdn hao trdn drJdng
dAy
vA trong m6y
ph6t,
biet rdng di6n tr6
c0a duong dAy /
phaldrrd=0,15C),di6ntrddAyqudnphdnfng/phac0amdyphdtldrrl=0,045
O(1d).
b/
Ndu
ddt
th6m
mQt
tdn sd 60
Hz, di6n dp dinh mrlc
U1/U2
=7200/480
V, co
cdc
th6ng sd
tfnn bing ohms:
R,cao
dp
=
3,06 X,cao
6p
=
6,05 XM, cao eip
=
17
809
R,h4 dp
=
0,014
X,ha Ap
=
0,027 RM,
cao
6p
=
71 400
Mdy biSn dp cung
cdp diQn
(k€i
cA
tdng
trd c0a tAi)
(1
d)
c/ di6n
dp
phia
cao dp c0a mdy bidn dp khi do
(1
d)
d/tdng tr6 nhinvdo
mdy bidn dp
ttl
phia
cao dp khi kh6ng tai
(1
d)
4. D6ng
cd diQn
1
chidu kfch
trt
song song, c6ng
suSt
dinh mfc Pdm
=
95 kw, di6n
6p
(0,5
d)
c/ moment cr3a d6ng cd
(1
d)
d/
di6n
tr6 didu chinh Rdc
cdn
thidt mdc
ndi tidp tr6n
phdn
rrng dd O6ng
cd
quay
vdi n
=
ndm, lU
=
ludm vd trl th6ng
giAm
di40 %
(1
d).
ls
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