Đồ án nhà máy điện phần tính toán

CHỈÅNG IV
TÊNH TOẠN NGÀÕN MẢCH
Ngàõn mảch l tçnh trảng sỉû cäú nghiãm trng thỉåìng xy ra trong hãû thäúng
âiãûn. Vç váûy cạc khê củ âiãûn phi âỉûåc tênh toạn v lỉûa chn sao cho khäng nhỉỵng
lm viãûc åí chãú âäü bçnh thỉåìng m cn cọ thãø chëu âỉûng âỉåüc khi xày ra sỉû cäú ngàõn
mảch.
Âãø kiãøm tra cạc pháưn tỉí trong hãû thäúng âiãûn âm bo äøn âënh âäüng v äøn
âënh nhiãût, chụng ta phi dỉû bạo cạc tçnh trảng ngàõn mảch cọ thãø xày ra v xạc âënh
dng ngàõn mảch tênh toạn tỉång ỉïng. Cạc säú liãûu vãư dng ngàõn mảch l càn cỉï quan
trng âãø thiãút kãú hãû thäúng bo vãû råle v âënh phỉång hỉåïng váûn hnh hãû thäúng.
Do tênh toạn ngàõn mảch l pháưn khäng thãø thiãúu trong thiãút kãú nh mạy âiãûn
v hãû thäúng âiãûn, phỉång phạp tênh toạn åí âáy l dng phỉång phạp dng âỉåìng
cong tênh toạn.
IV.1. TÊNH TOẠN NGÀÕN MẢCH CHO PHỈÅNG ẠN 1:
IV.1.1. Âiãøm ngàõn mảch tênh toạn: Hçnh IV.1.1
Hçnh IV.1.1
- Âiãøm N
1
: dng âãø chn khê củ âiãûn phêa cao ạp 220kV. Tçnh trảng så âäư
trỉåïc lục ngàõn mảch l cạc thiãút bë váûn hnh bçnh thỉåìng, ngưn cung cáúp l táút c
mạy phạt v hãû thäúng.
SVTH: Mai Hải An Trang21
110kV
~
F
1
~
F
2
~
F

3
~
F
4
B
1
B
2
B
3
B
4
220kV
~
H
TD TD
TD
TD
1
N
2
N
7
N
8
N
'
7
N
3

N
'
3
N
4
N
5
N
6
N
'
5
N
- ióứm N
2
: duỡng õóứ choỹn khờ cuỷ õióỷn phờa trung aùp 110kV.
Tỗnh traỷng sồ õọử trổồùc khi ngừn maỷch laỡ tỏỳt caớ caùc thióỳt bở õang vỏỷn haỡnh
bỗnh thổồỡng, nguọửn cung cỏỳp laỡ tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng.
- ióứm N
3,
N
3
'
: duỡng õóứ choỹn khờ cuỷ õióỷn phờa haỷ aùp maùy bióỳn aùp lión laỷc.
Tỗnh traỷng sồ õọử trổồùc khi ngừn maỷch laỡ tỏỳt caớ thióỳt bở vỏỷn haỡnh bỗnh thổồỡng, nguọửn
cung cỏỳp cho N
3
giaớ thióỳt chố coù F
2
laỡm vióỷc, nguọửn cung cỏỳp N

3
'
laỡ
ỡ
tỏỳt caớ maùy phaùt
vaỡ hóỷ thọỳng trổỡ maùy phaùt F
2
.
- ióứm ngừn maỷch N
5
,N
5
'
, N
7
, N
7
'
: duỡng õóứ choỹn khờ cuỷ õióỷn maỷch haỷ aùp maùy
bióỳn aùp nọỳi bọỹ. Tỗnh traỷng sồ õọử trổồùc luùc ngừn maỷch laỡ tỏỳt caớ caùc thióỳt bở vỏỷn haỡnh
bỗnh thổồỡng, nguọửn cung cỏỳp cho N
5
giaớ thióỳt chố coù F
4
laỡm vióỷc, nguọửn cỏỳp cho N
7
giaớ thióỳt chố coù F
1
laỡm vióỷc, nguọửn cung cỏỳp N
5

'
laỡ
ỡ
tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng trổỡ
maùy phaùt F
4
, nguọửn cỏỳp N
7
'
laỡỡ tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng trổỡ maùy phaùt F
1.
-
ióứm ngừn maỷch N
4
, N
6
N
8
:

duỡng õóứ choỹn khờ cuỷ õióỷn cho maỷch tổỷ duỡng.
Tỗnh traỷng sồ õọử trổồùc luùc ngừn maỷch laỡ tỏỳt caớ thióỳt bở vỏỷn haỡnh bỗnh thổồỡng, nguọửn
cung cỏỳp laỡ tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng.

Dổỷa vaỡo sồ õọ HỗnhVI.1 ta coù:

3N
3N4N
'
III +=

;
5N
5N6N
'
III +=
;
7N
7N8N
'
III +=
.
IV.1.2. Lỏỷp sồ õọử tờnh toaùn vaỡ xaùc õởnh caùc õaỷi lổồỹng tờnh toaùn:
a.Sồ õọử thay thóỳ
: Hỗnh IV.1.2
Hinh IV.1.2
b. Xaùc õởnh õaỷi lổồỹng tờnh toaùn:
+ Choỹn caùc õaỷi lổồỹng cồ baớn:
óứ õồn giaớn trong vióỷc tờnh toaùn, choỹn caùc õaỷi lổồỹng cồ baớn sau:
SVTH: Mai Haỷi An Trang22
1
E
2
E
3
E
4
E
H
1
X

2
X
4
X
3
X
5
X
6
X
7
X
8
X
11
X
10
X
13
X
14
X
9
X
12
X
S
cb
= 100MVA
U

cb
= U
tb
: nghộa laỡ : U
cbIII
=230 kV, U
cbII
= 115kV, U
cbI
= 10,5kV
+ Doỡng õióỷn cồ baớn:
Cỏỳp 220kV:
251,0
230.3
100
U.3
S
I
cbIII
cb
cbIII
===
(kA)
Cỏỳp 110kV:
502,0
115.3
100
U.3
S
I

cbII
cb
cbII
===
(kA)
Cỏỳp 10,5kV:
499,5
5,10.3
100
U.3
S
I
cbI
cb
cbI
===
(kA)
Giaù trở õióỷn khaùng cuớa caùc phỏửn tổớ trong sồ õọử:
- ióỷn khaùng cuớa caùc maùy phaùt nhióỷt õióỷn:
179,0
75,68
100
123,0
S
S
XXXXX
õmF
cb
d4321
==

====
- ióỷn khaùng cuớa maùy bióỳn aùp 3 pha 2 cuọỹn dỏy B
4
, B
1
:
131,0
80
100
100
5,10
S
S
100
%U
X
4õmB
cbN
5
===
138,0
80
100
100
11
S
S
100
%U

X
1õmB
cbN
6
===
- ióỷn khaùng cuớa maùy bióỳn aùp tổỷ ngỏựu lión laỷc B
2
, B
3
:
õmB
cb
TCN
cl
HTN
cl
HCN
H107
S
S
%U
K
%U
K
%U
200
1
XXX

+===


291,0
160
100
11
5,0
20
5,0
32
200
1
XXX
H107
=






+===
õmB

cb
cl
HCN
cl
HTN
TCNT118
S
S
K
%U
K
%U
%U
200
1
XXX








+===


028,0
160
100

5,0
30
5,0
20
11
200
1
XXX
T118
=






+===
õmB
cb
cl
HTN
cl
HCN
TCNC129
S
S
K
%U
K
%U

%U
200
1
XXX








===


097,0
160
100
5,0
20
5,0
30
11
200
1
XXX
C129
=

+===
- ióỷn khaùng cuớa õổồỡng dỏy lión laỷc vồùi hóỷ thọỳng:
04,0
230
100
.100.42,0.5,0
U
S
lX
2
1
X
22
cbIII
cb
013
===
SVTH: Mai Haỷi An Trang23
- ióỷn khaùng cuớa hóỷ thọỳng:
009,0
3000
100
27,0
S
S
XX

õmHT
cb
HT14
===
IV.1.3. Tờnh doỡng ngừn maỷch taỷi caùc õióứm.
a. ióứm ngừn maỷch N
1
:
Sồ õọử thay thóỳ :Hỗnh IV.1.3
Hỗnh IV.1.3
317,0XXX
6115
=+=
47,0XXX
7216
=+=
47,0XXX
10317
=+=
31,0XXX
5418
=+=
049,0XXX
141319
=+=
0485,0
2
097,0
X//XX
12920

===
235,0
2
47,0
X//XX
171621
===
1337,0
31,0235,0
31,0235,0
X//XX
182122
=
+

==
1822,0XXX
202223
=+=
118,0
1822,0317,0
1822,0317,0
X//XX
231524
=
+

==
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:

SVTH: Mai Haỷi An Trang24
1
E
2
E
3
E
4
E
H
179,0
1
X
179,0
2
X
179,0
4
X
179,0
3
X
131,0
5
X
138,0
6
X
0
8

X
0
9
X
291,0
10
X
097,0
12
X
009,0
14
X
04,0
13
X
291,0
7
X
097,0
9
X
1
N
H
1
E
2
E
4

E
3
E
049,0
19
X
317,0
15
X
47,0
16
X
31,0
18
X
47,0
17
X
097,0
9
X
097,0
12
X
1
N
H
1
N
049,0

19
X
317,0
15
X
235,0
21
X
0485,0
20
X
31,0
18
X
1
E
23
E
4
E
H
1234
E
049,0
19
X
118,0
24
X
1

N
3245,0
100
275
118,0
S
S
XX
cb
õmB
24tt
===

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 3,1; I
ckt

= 2,2.
cbIII
õmF
cktcktF
U3
S
IIII

==

-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
122,5
049,0
251.0
I
X
1
I
cbIII
19
NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi N
1
:
262,7122,5
2303
275
1,3I
U3
S
II
NH
cbIII
õmF
0ckt1N
=+

=+

=


(kA)
641,6122,5
2303
275
2,2I
U3
S
II
NH
cbIII
õmF
ckt1N
=+

=+

=



(kA)
- Doỡng ngừn maỷch xung kờch:
486,18262,7.8,1.2IK2i
1Nxkxk
==

=
(kA)
( )
038,11262,7.52,1I1K21I.qI
1N
2
xk1Nxk
==

+=

=
(kA)
b. ióứm ngừn maỷch N
2
:
Sồ õọử thay thóỳ : Hỗnh IV.1.4
Hỗnh IV.1.4


317,0XXX
6115
=+=
47,0XXX
7216
=+=
SVTH: Mai Haỷi An Trang25
1
E

2
E
3
E
4
E
H
179,0
1
X
179,0
2
X
179,0
4
X
179,0
3
X
131,0
5
X
138,0
6
X
0
8
X
0
9

X
291,0
10
X
097,0
12
X
009,0
14
X
04,0
13
X
291,0
7
X
097,0
9
X
2
N
H
1
E
2
E
4
E
3
E

049,0
19
X
317,0
15
X
47,0
16
X
31,0
18
X
47,0
17
X
097,0
9
X
097,0
12
X
2
N
1
E
2
E
3
E
4

E
H
179,0
1
X
179,0
2
X
179,0
4
X
179,0
3
X
131,0
5
X
138,0
6
X
0
8
X
0
9
X
291,0
10
X
097,0

12
X
009,0
14
X
04,0
13
X
291,0
7
X
097,0
9
X
2
N
47,0XXX
10317
=+=
31,0XXX
5418
=+=

049,0XXX
141319
=+=
0485,0
2
097,0
X//XX

12920
===
235,0
2
47,0
X//XX
171621
===
- Bióỳn õọứi Y( X
15
, X
19
, X
20
) sang ( X
25
, X
26
)
015,0
317,0
0485,0.049,0
0485,0049,0
X
XX
XXX
15
2019
201925
=++=

++=
679,0
049,0
0485,0.317,0
0485,0317,0
X
XX
XXX
19
2015
201526
=++=

++=
1117,0
1337,0679,0
1337,0.679,0
X//XX
222627
=
+
==
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
302,0
100
275
1117,0
S

S
XX
cb
õmB
27tt
===

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 3,3; I
ckt

= 2,25.
cbII
õmF
cktcktF
U3
S
IIII

==


-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
467,33
015,0
502.0
I

X
1
I
cbII
25
NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi N
2
:
SVTH: Mai Haỷi An Trang26
H
2
N
049,0
19
X
317,0
15
X
235,0
21
X
0485,0
20
X
31,0
18
X

1
E
23
E
4
E
H
1234
E
015,0
25
X
1117,0
27
X
2
N
015,0
25
X
679,0
26
X
2
N
H
234
E
1
E

13370
22
,
X
023,38467,33
1153
275
3,3I
U3
S
II
NH
cbII
õmF
0ckt2N
=+

=+

=


(kA)
573,36467,33
1153
275
25,2I
U3
S
II

NH
cbII
õmF
ckt2N
=+

=+

=



(kA)
- Doỡng ngừn maỷch xung kờch:
791,96023,38.8,1.2IK2i
2Nxkxk
==

=
(kA)
( )
795,57023,38.52,1I1K21I.qI
2N
2
xk2Nxk
==

+=

=

(kA)

c. ióứm ngừn maỷch N
3
, N
5
, N
7
.
Giaớ thióỳt nguọửn chố coù 1 maùy phaùt cung cỏỳp
+ Sồ õọử thay thóỳ :
Hỗnh IV.1.5
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp cuợng chờnh laỡ doỡng ngừn maỷch
3 pha taỷi N
3
:
123,0
100
75,68
179,0
S
S
XX
cb
õmB
2tt
===

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa

doỡng ngừn maỷch:
I
ckt o
=8; I
ckt

= 2,8.
cbI
õmF
cktcktF
U3
S
IIII

==


- Doỡng ngừn maỷch 3 pha taỷi N
3
:
242,30
5,103
75,68
8
U3
S
II
cbI
õmF
0ckt3N

=

=

=


(kA)
585,10
5,103
75,68
8,2
U3
S
II
cbI
õmF
ckt3N
=

=

=



(kA)
- Doỡng ngừn maỷch xung kờch:
688,81242,30.91,1.2IK2i
3Nxkxk

==

=
(kA)
( )
294,49242,30.63,1I1K21I.qI
3N
2
xk3Nxk
==

+=

=
(kA)
Tổồng tổỷ õọỳi vồùi N
5
, N
7
:
SVTH: Mai Haỷi An Trang27
2
E
179,0
2
X
3
N
242,30III
3N7N5N

=

=

=

(kA)
585,10III
3N7N5N
===

(kA)
( ) ( ) ( )
688,81iii
3Nxk7Nxk5Nxk
===
(kA)
( ) ( ) ( )
294,49III
3Nxk7Nxk5Nxk
===
(kA)
d. ióứm ngừn maỷch
3
N

.
Sồ õọử thay thóỳ: Hỗnh IV.6
Hỗnh IV.1.6

317,0XXX
6115
=+=
47,0XXX
10317
=+=
31,0XXX
5418
=+=

049,0XXX
141319
=+=
0485,0
2
097,0
X//XX
12920
===
- Bióỳn õọứi Y( X
15
, X
19
, X
20
) sang ( X
25
, X
26

)
015,0
317,0
0485,0.049,0
0485,0049,0
X
XX
XXX
15
2019
201925
=++=

++=

679,0
049,0
0485,0.317,0
0485,0317,0
X
XX
XXX
19
2015
201526
=++=

++=

1868,0

47,031,0
47,0.31,0
X//XX
171828
=
+
==
SVTH: Mai Haỷi An Trang28
097,0
12
X
009,0
14
X
04,0
13
X
1
E
3
E
4
E
179,0
1
X
179,0
4
X
179,0

3
X
131,0
5
X
138,0
6
X
0
8
X
0
9
X
291,0
10
X
291,0
7
X
097,0
9
X
'
3
N
H
'
3
N

015,0
25
X
679,0
26
X
291,0
7
X
1868,0
28
X
1
E
34
E
015,0
25
X
291,0
X
7
'
3
N
H
134
E
1465,0
29

X
049,0
19
X
H
1
E
4
E
3
E
317,0
15
X
291,0
7
X
31,0
18
X
47,0
17
X
'
3
N
0485,0
20
X

1465,0
1868,0679,0
01868.679,0
X//XX
282629
=
+
==
- Bióỳn õọứi Y( X
7
, X
25
, X
29
) sang ( X
30
, X
31
)

3357,0
1465,0
015,0.291,0
015,0291,0
X
XX
XXX
29
257
25730

=++=

++=

2796,3
015,0
1465,0.291,0
1465,0291,0
X
XX
XXX
25
297
29731
=++=

++=
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
764,6
100
75,683
2796,3
S
S
XX
cb
õmB
31tt
=

==

X
tt
= 6,764 > 3 nón khọng duỡng phổồng phaùp õổồỡng cong tờnh toaùn
6766,1
5,103
75,683
764,6
1
U3
S
X
1
X
I
I
cbI
õmF
tttt
F
=


=

==

- Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
381,16
3357,0
499,5
I
X
1
I
cbI
30
NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi
3
N

:
0576,18381,166766,1III
NHF3N
=+=+=


(kA)
0576,18381,166766,1III
NHF
3N
=+=+=

(kA)
- Doỡng ngừn maỷch xung kờch:
967,450576,18.8,1.2IK2i
3Nxkxk
==

=

(kA)
( )
447,270576,18.52,1I1K21I.qI
3N
2
xk3Nxk
==

+=

=

(kA)
e. ióứm ngừn maỷch N
5
'
.
Sồ õọử thay thóỳ Hỗnh IV.1.7
SVTH: Mai Haỷi An Trang29
H
134
E

2796,3
31
X
'
3
N
3357,0
30
X
1
E
2
E
3
E
H
179,0
1
X
179,0
2
X
179,0
3
X
131,0
5
X
138,0
6

X
0
8
X
0
9
X
291,0
10
X
097,0
12
X
009,0
14
X
04,0
13
X
291,0
7
X
097,0
9
X
'
5
N
Hỗnh IV.1.7

317,0XXX
6115
=+=
47,0XXX
7216
=+=

47,0XXX
10317
=+=
049,0XXX
141319
=+=
0485,0
2
097,0
X//XX
12920
===
235,0
2
47,0
X//XX
171621
===

- Bióỳn õọứi Y( X
15
, X
19

, X
20
) sang ( X
25
, X
26
)
015,0
317,0
0485,0.049,0
0485,0049,0
X
XX
XXX
15
2019
201925
=++=

++=

679,0
049,0
0485,0.317,0
0485,0317,0
X
XX
XXX
19
2015

201526
=++=

++=

1757,0
679,0235,0
679,0.235,0
X//XX
262132
=
+
==
- Bióỳn õọứi Y( X
5
, X
25
, X
32
) sang ( X
33
, X
34
)

157,0
1757,0
015,0.131,0
015,0131,0
X

XX
XXX
32
255
25533
=++=

++=
SVTH: Mai Haỷi An Trang30
H
'
5
N
015,0
25
X
679,0
26
X
235,0
21
X
131,0
5
X
1
E
23
E
H

1
E
3
E
049,0
19
X
317,0
15
X
131,0
5
X
47,0
17
X
'
5
N
0485,0
20
X
2
E
47,0
16
X
131,0
5
X

015,0
25
X
1757,0
32
X
H
123
E

841,1
015,0
1757,0.131,0
1757,0131,0
X
XX
XXX
25
325
32534
=++=

++=
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
797,3
100
75,683
841,1
S

S
XX
cb
õmB
34tt
=

==

X
tt
= 3,797 > 3 nón khọng duỡng phổồng phaùp õổồỡng cong tờnh toaùn
987,2
5,103
75,683
797,3
1
U3
S
X
1
X
I
I
cbI
õmF
tttt
F
=

=

==


-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
0255,35
157,0
499,5
I
X
1
I
cbI
33
NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi
5
N

:
0123,380255,35987,2III
NHF5N
=+=+=


(kA)

0123,380255,35987,2III
NHF5N
=+=+=


(kA)
- Doỡng ngừn maỷch xung kờch:
7635,960123,38.8,1.2IK2i
5Nxkxk
==

=

(kA)
( )
7786,570123,38.52,1I1K21I.qI
5N
2
xk5Nxk
==

+=

=

(kA)
f. ióứm ngừn maỷch N
'
7
. Sồ õọử thay thóỳ : Hỗnh IV.1.8

SVTH: Mai Haỷi An Trang31
H
123
E
841,1
34
X
'
5
N
157,0
33
X
2
E
3
E
H
179,0
2
X
179,0
4
X
179,0
3
X
131,0
5
X

138,0
6
X
0
8
X
0
9
X
291,0
10
X
097,0
12
X
009,0
14
X
04,0
13
X
291,0
7
X
097,0
9
X
'
7
N

Hỗnh IV.1.8


47,0XXX
7216
=+=
47,0XXX
10317
=+=
31,0XXX
5418
=+=
049,0XXX
141319
=+=
0485,0
2
097,0
X//XX
12920
===
235,0
2
47,0
X//XX
171621
===
1337,0
31,0235,0

31,0235,0
X//XX
182122
=
+

==
1822,0XXX
202223
=+=
- Bióỳn õọứi Y( X
5
, X
19
, X
23
) sang ( X
35
, X
36
)

224,0
1822,0
049,0.131,0
049,0131,0
X
XX
XXX
23

195
19535
=++=

++=

8333,0
049,0
1822,0.131,0
1822,0131,0
X
XX
XXX
19
235
23536
=++=

++=

Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
719,1
100
75,683
8333,0
S
S
XX
cb

õmB
36tt
=

==

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 0,61; I
ckt

= 0,62.
SVTH: Mai Haỷi An Trang32
H
4
E
3
E
049,0
19
X
138,0
6
X
47,0
16
X
31,0

18
X
47,0
17
X
097,0
9
X
097,0
12
X
'
7
N
049,0
19
X
H
131,0
5
X
1337,0
22
X
0485,0
20
X
234
E
'

7
N
H
1234
E
8333,0
36
X
'
7
N
224,0
35
X
cbI
õmF
cktcktF
U3
S
IIII

==


-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
549,24
224,0
499,5
I
X

1
I
cbI
35
NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi N
7
'
:
467,31549,24
5,103
75,683
61,0I
U3
S
II
NH
cbI
õmF
0ckt7N
=+


=+

=

(kA)
58,31549,24
5,103
75.683
62,0I
U3
S
II
NH
cbI
õmF
ckt
7N
=+


=+

=




(kA)
- Doỡng ngừn maỷch xung kờch:
102,80467,318,12IK2i
7Nxkxk
==

=

(kA)
( )
83,47467,31.52,1I1K21I.qI
7N
2
xk7Nxk
==

+=

=

(kA)
g. ióứm ngừn maỷch N
4
.
Tổỡ sồ õọử tờnh toaùn ngừn maỷch ta coù:

3N3N4N
III

+=
- Doỡng ngừn maỷch 3 pha taỷi N
4
:

2996,480576,18242,30III
3N3N4N

=+=

+

=


(kA)

64286,280576,18585,10III
3N3N4N
=+=

+=


(kA)
- Doỡng ngừn maỷch xung kich:

( )
655,127967,45688,81Niii
'
3xkxkxk
=+=+=
(kA)

( )
( )
741,78447,27294,49NINII
'

3xk3xkxk
=+=+=
(kA)

h. ióứm ngừn maỷch N
6
. Tổỡ sồ õọử tờnh toaùn ngừn maỷch ta coù:

5N
5N6N
'
III +=
- Doỡng ngừn maỷch 3 pha taỷi N
6
:

2543,680123,38242,30III
5N5N6N
=+=

+

=


(kA)

5973,480123,38585,10III
5N5N6N
=+=

+=


(kA)
- Doỡng ngừn maỷch xung kich:

( )
( )
4515,1787635,96688,81NiNii
5xk5xkxk
=+=

+=
(kA)

( ) ( )
0726,1077786,57294,49NINII
5xk5xkxk
=+=

+=
(kA)
k. ióứm ngừn maỷch N
8
.
Tổỡ sồ õọử tờnh toaùn ngừn maỷch ta coù:

7N
7N8N

'
III +=
- Doỡng ngừn maỷch 3 pha taỷi N
8
:
SVTH: Mai Haỷi An Trang33

709,61467,31242,30III
7N7N8N
=+=

+

=


(kA)

165,4258,31585,10III
7N7N8N
=+=+=



(kA)
- Doỡng ngừn maỷch xung kich:

( ) ( )
79,161102,80688,81NiNii
'

7xk7xkxk
=+=+=
(kA)

( )
( )
124,9783,47294,49NINII
'
7xk7xkxk
=+=+=
(kA)
Nhỏỷn xeùt:
- So saùnh õióứm (N
5
, N
'
5
), (N
7
, N
'
7
) õóứ choỹn khờ cuỷ õióỷn ồớ bọỹ trung_cao.
- So saùnh õióứm N
4
, N
6
, N
8
õóứ choỹn khờ cuỷ vaỡ kióứm tra maỷch tổỷ duỡng.

- So saùnh õióứm (N
3
, N
'
3
) õóứ choỹn khờ cuỷ õióỷn cho maỷch haỷ aùp maùy bióỳn aùp tổỷ
ngỏựu lión laỷc.
Phổồng
Aùn
ióứm
NM
Choỹn khờ cuỷ cho maỷch
U
õm
(kV)
I
''
(kA)
I

(kA)
i
xk
(kA)
I
xk
(kA)
I
N
1

Cao aùp 220 7,262 7,752 18,486 11,038
N
2
Trung aùp 110 38,023 36,573 96,791 57,795
N
'
3
Haỷ aùp MBA tổỷ ngỏựu lión laỷc 10,5 32,117 32,797 81,756 48,818
N
'
5
Haỷ aùp MBA nọỳi bọỹ trung 10,5 38,012338,012396,763557,7786
N
'
7
Haỷ aùp MBA nọỳi bọỹ cao 10,5 31,467 31,58 80,102 47,83
N
6
Tổỷ duỡng 10,5 68,254348,5973178,452107,073
IV.2. PHặNG AẽN 4.
IV.2.1. ióứm ngừn maỷch tờnh toaùn:
SVTH: Mai Haỷi An Trang34
110kV
~
F
2
B
2
B
6

B
5
~
F
3
B
3
220kV
~
H
~
F
1
B
1
~
F
4
B
4
TD TD TD
TD
TDDT
1
N
3
N
'
3
N

4
N
7
N
5
N
'
5
N
6
N
2
N
Hỗnh IV.2.1
- ióứm N
1
: duỡng õóứ choỹn khờ cuỷ õióỷn phờa cao aùp 220kV. Tỗnh traỷng sồ õọử
trổồùc luùc ngừn maỷch laỡ caùc thióỳt bở vỏỷn haỡnh bỗnh thổồỡng, nguọửn cung cỏỳp laỡ tỏỳt caớ
maùy phaùt vaỡ hóỷ thọỳng.
- ióứm N
2
: duỡng õóứ choỹn khờ cuỷ õióỷn phờa trung aùp 110kV. Tỗnh traỷng sồ õọử
trổồùc khi ngừn maỷch laỡ tỏỳt caớ caùc thióỳt bở õang vỏỷn haỡnh bỗnh thổồỡng, nguọửn cung
cỏỳp laỡ tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng.
- ióứm N
3,
N
3
'
, N

5
, N
'
5
: duỡng õóứ choỹn khờ cuỷ õióỷn phờa haỷ aùp maùy bióỳn aùp nọỳi
bọỹ. Tỗnh traỷng sồ õọử trổồùc khi ngừn maỷch laỡ tỏỳt caớ thióỳt bở vỏỷn haỡnh bỗnh thổồỡng,
nguọửn cung cỏỳp cho N
3
giaớ thióỳt chố coù F
1
laỡm vióỷc, nguọửn cung cỏỳp N
3
'
laỡ
ỡ
tỏỳt caớ maùy
phaùt vaỡ hóỷ thọỳng trổỡ maùy phaùt F
1
, nguọửn cung cỏỳp cho N
5
giaớ thióỳt chố coù F
4
laỡm
vióỷc, nguọửn cung cỏỳp N
5
'
laỡ
ỡ
tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng trổỡ maùy phaùt F
4

.
- ióứm ngừn maỷch N
4
, N
6
:

duỡng õóứ choỹn khờ cuỷ õióỷn cho maỷch tổỷ duỡng. Tỗnh
traỷng sồ õọử trổồùc luùc ngừn mach laỡ tỏỳt caớ thióỳt bở vỏỷn haỡnh bỗnh thổồỡng, nguọửn cung
cỏỳp laỡ tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng.
- ióứm ngừn maỷch N
7
: duỡng õóứ choỹn khờ cuỷ õióỷn maỷch haỷ aùp maùy bióỳn aùp lión
laỷc. Tỗnh traỷng sồ õọử trổồùc luùc ngừn maỷch laỡ tỏỳt caớ caùc thióỳt bở vỏỷn haỡnh bỗnh thổồỡng
nguọửn cỏỳp cho N
7
laỡỡ tỏỳt caớ maùy phaùt vaỡ hóỷ thọỳng

Dổỷa vaỡo sồ õọử Hỗnh IV.2.1 ta coù:

3N
3N4N
'
III +=

5N
5N6N
'
III +=
IV.2.2. Lỏỷp sồ õọử tờnh toaùn vaỡ xaùc õởnh caùc õaỷi lổồỹng cỏửn tờnh toaùn.

a. Lỏỷp sồ õọử tờnh toaùn.
Sồ õọử nhổ hỗnh IV.2.2
SVTH: Mai Haỷi An Trang35
16
X
15
X
14
X
9
X
11
X
8
X
12
X
4
X
5
X
6
X
7
X
1
X
2
X

3
X
10
X
13
X
1
E
2
E
3
E
4
E
H
Hỗnh IV.2.2
b. Xaùc õởnh caùc õaỷi lổồỹng cồ baớn:

óứ õồn giaớn trong vióỷc tờnh toaùn ta choỹn caùc õaỷi lổồỹng cồ baớn sau:
S
cb
= 100 MVA
U
cb
= U
tbõm
: nghộa laỡ : U
cbIII
= 230 kV, U
cbII

= 115 kV, U
cbI
= 10,5 kV
Doỡng õióỷn cồ baớn:
Cỏỳp 220kV:
251,0
230.3
100
U.3
S
I
cbIII
cb
cbIII
===
(kA)
Cỏỳp 110kV:
502,0
115.3
100
U.3
S
I
cbII
cb
cbII
===
(kA)
Cỏỳp 10,5kV:
499,5

5,10.3
100
U.3
S
I
cbI
cb
cbI
===
(kA)
Giaù trở õióỷn khaùng cuớa caùc phỏửn tổớ trong sồ õọử:
- ióỷn khaùng cuớa caùc maùy phaùt nhióỷt õióỷn:
179,0
75,68
100
123,0
S
S
XXXXX
õmF
cb
d4321
==

====
- ióỷn khaùng cuớa maùy bióỳn aùp 3 pha 2 cuọỹn dỏy B
1
, B
2
, B

3
, B
4
:
138,0
80
100
100
11
S
S
100
%U
XXX
1õmB
cbN
765
=====
131,0
80
100
100
5,10
S
S
100
%U
X
4õmB
cbN

8
===
- ióỷn khaùng cuớa maùy bióỳn aùp tổỷ ngỏựu lión laỷc B
5
, B
6
:
õmB
cb
TCN
cl
HTN
cl
HCN
H129
S
S
%U
K
%U
K
%U
200
1
XXX

+===


817,0
63
100
11
5,0
22
5,0
35
200
1
XXX
H129
=






+===
SVTH: Mai Haỷi An Trang36
õmB
cb
cl

HCN
cl
HTN
TCNT1310
S
S
K
%U
K
%U
%U
200
1
XXX








+===


0119,0
63
100
5,0
35

5,0
22
11
200
1
XXX
T1310
==






+===
õmB
cb
cl
HTN
cl
HCN
TCNC1411
S
S
K
%U
K
%U
%U
200

1
XXX








===


294,0
63
100
5,0
22
5,0
35
11
200
1
XXX
C1411
=

+===
- ióỷn khaùng cuớa õổồỡng dỏy lión laỷc vồùi hóỷ thọỳng:
04,0
230
100
.100.42,0.5,0
S
S
lX
2
1
X
22
cbIII
cb
015
===
- ióỷn khaùng cuớa hóỷ thọỳng:

009,0
3000
100
27,0
S
S
XX
õmHT
cb

HT16
===
IV.2.3. Tờnh doỡng ngừn maỷch taỷi caùc õióứm.

a. ióứm ngừn maỷch N
1.
Sồ õọử thay thóỳ :Hỗnh IV.2.3
Hỗnh IV.2.3
317,0XXX
5117
=+=
317,0XXX
6218
=+=
317,0XXX
7319
=+=
31,0XXX
8420
=+=
1057,0
3
317,0
X//X//XX
19181721
===
SVTH: Mai Haỷi An Trang37
009,0
16
X

04,0
15
X
294,0
14
X
817,0
9
X
294,0
11
X
131,0
8
X
817,0
12
X
179,0
4
X
138,0
5
X
138,0
6
X
138,0
7
X

179,0
1
X
179,0
2
X
179,0
3
X
0
10
X
0
13
X
1
E
2
E
3
E
4
E
H
1
N
H
1234
E
049,0

23
X
0858,0
25
X
1
N
H
1
N
049,0
23
X
147,0
22
X
123
E
4
E
1057,0
21
X
31,0
20
X
147,0
2
294,0
X//XX

141122
===
049,0XXX
161523
=+=
457,0XXX
222024
=+=
0858,0
457,01057,0
457,01057,0
X//XX
242125
=
+

==
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
236,0
100
275
0858,0
S
S
XX
cb
õmB
25tt
===

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 4,3; I
ckt

= 2,45.
cbIII
õmF
cktcktF
U3
S
IIII

==


-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
122,5
049,0
251.0
I
X
1
I
cbIII
23
NH

===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi N
1
:
09,8122,5
2303
275
3,4I
U3
S
II
NH
cbIII
õmF
0ckt1N
=+

=+

=


(kA)
814,6122,5
2303
275
45,2I
U3
S

II
NH
cbIII
õmF
ckt1N
=+

=+

=



(kA)
- Doỡng ngừn maỷch xung kờch:
594,2009,8.8,1.2IK2i
1Nxkxk
==

=
(kA)
( )
297,1209,8.52,1I1K21I.qI
1N
2
xk1Nxk
==

+=

=
(kA)
b. ióứm ngừn maỷch N
2
:
Sồ õọử thay thóỳ: Hỗnh IV.2.4
SVTH: Mai Haỷi An Trang38
009,0
16
X
04,0
15
X
294,0
14
X
817,0
9
X
294,0
11
X
131,0
8
X
817,0
12
X
179,0
4

X
138,0
5
X
138,0
6
X
138,0
7
X
179,0
1
X
179,0
2
X
179,0
3
X
0
10
X
0
13
X
1
E
2
E
3

E
4
E
H
2
N
Hỗnh IV.2.4

317,0XXX
5117
=+=
317,0XXX
6218
=+=
317,0XXX
7319
=+=
31,0XXX
8420
=+=
1057,0
3
317,0
X//X//XX
19181721
===
147,0
2
294,0
X//XX

141122
===
049,0XXX
161523
=+=
- Bióỳn õọứi Y( X
21
, X
22
, X
23
) sang ( X
26
, X
27
)

264,0
1057,0
049,0.147,0
049,0147,0
X
XX
XXX
21
2322
232226
=++=

++=

5698,0
049,0
147,0.1057,0
147,01057,0
X
XX
XXX
23
2221
222127
=++=

++=


2,0
31,05698,0
31,0.5698,0
X//XX
202728
=
+
==
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
55,0
100
275
2,0

S
S
XX
cb
õmF
28tt
===

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 1,8; I
ckt

= 1,73.
cbII
õmF
cktcktF
U3
S
IIII

==


SVTH: Mai Haỷi An Trang39
H
049,0
23

X
147,0
22
X
123
E
4
E
1057,0
21
X
31,0
20
X
2
N
H
264,0
26
X
5698,0
27
X
123
E
4
E
31,0
X
20

2
N
H
1234
E
2
N
264,0
26
X
-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
9015,1
264,0
502.0
I
X
1
I
cbII
26
NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi N
2
:
387,49015,1
1153
275
8,1I

U3
S
II
NH
cbII
õmF
0ckt2N
=+

=+

=


(kA)
29,49015,1
1153
275
73,1I
U3
S
II
NH
cbII
õmF
ckt2N
=+

=+

=



(kA)
- Doỡng ngừn maỷch xung kờch:
167,11387,4.8,1.2IK2i
2Nxkxk
==

=
(kA)
( )
668,6387,452,1I1K21I.qI
2N
2
xk2Nxk
==

+=

=
(kA)
c. ióứm ngừn maỷch N
3
, N
5
:
Sồ õọử thay thóỳ: Hỗnh IV.2.5
Hỗnh IV.2.5

Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp cuợng chờnh laỡ doỡng ngừn maỷch
3 pha taỷi N
3
:
123,0
100
75,68
179,0
S
S
XX
cb
õmF
3tt
===

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu
kyỡ cuớa doỡng ngừn maỷch:
I
ckt o
= 8; I
ckt

= 2,8.
cbI
õmF
cktcktF
U3
S

IIII

==


- Doỡng ngừn maỷch 3 pha taỷi N
3
:
242,30
5,103
75,68
8
U3
S
II
cbI
õmF
0ckt3N
=

=

=


(kA)
585,10
5,103
75,68
8,2

U3
S
II
cbI
õmF
ckt3N
=

=

=



(kA)
- Doỡng ngừn maỷch xung kờch:
688,81242,30.91,1.2IK2i
3Nxkxk
==

=
(kA)
SVTH: Mai Haỷi An Trang40
179,0
3
X
3
N
3
E

( )
294,49242,30.63,1I1K21I.qI
3N
2
xk3Nxk
==

+=

=
(kA)
Tổồng tổỷ õọỳi vồùi N
5
:
242,30II
3N5N
=

=

(kA)
585,10II
3N5N
==

(kA)
( ) ( )
688,81ii
3Nxk5Nxk
==

(kA)
( ) ( )
294,49II
3Nxk5Nxk
==
(kA)

d. ióứm ngừn maỷch
'
3
N
.
Sồ õọử thay thóỳ: Hỗnh IV.2.6

Hỗnh IV.2.6

317,0XXX
6218
=+=
317,0XXX
7319
=+=

31,0XXX
8420
=+=

147,0
2
294,0

X//XX
141122
===

049,0XXX
161523
=+=
457,0XXX
222024
=+=
1585,0
2
317,0
X//XX
241829
===
1177,0
457,01585,0
457,0.1585,0
X//XX
242930
=
+
==
- Bióỳn õọứi Y( X
5
, X
23
, X
30

) sang ( X
31
, X
32
)
SVTH: Mai Haỷi An Trang41
009,0
16
X
04,0
15
X
294,0
14
X
817,0
9
X
294,0
11
X
131,0
8
X
817,0
12
X
179,0
4
X

138,0
5
X
138,0
6
X
138,0
7
X
179,0
2
X
179,0
3
X
0
10
X
0
13
X
2
E
3
E
4
E
H
'
3

N
H
049,0
23
X
457,0
24
X
23
E
4
E
138,0
5
X
1585,0
29
X
'
3
N
H
049,0
23
X
1177,0
30
X
234
E

138,0
5
X
'
3
N
H
234
E
587,0
32
X
'
3
N
244,0
31
X

244,0
138,0
1177,0.049,0
1177,0049,0
X
XX
XXX
5
3023
302331
=++=

++=

587,0
049,0
1177,0.138,0
1177,0138,0
X
XX
XXX
23
305
30532
=++=

++=
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:
21,1
100
75,683
587,0
S
S
XX
cb
õmB
32tt
=

==

Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 0,85; I
ckt

= 0,93.
cbI
õmF
cktcktF
U3
S
IIII

==


-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
5369,22
244,0
499,5
I
X
1
I
cbI
31

NH
===
(kA)
- Doỡng ngừn maỷch 3 pha taỷi
'
3
N
:
177,325369,22
5,103
75,683
85,0I
U3
S
II
NH
cbI
õmF
0cktN
3
=+


=+

=



(kA)

084,335369,22
5,103
75,683
93,0I
U3
S
II
NH
cbI
õmF
ckt
N
3
=+


=+

=




(kA)
- Doỡng ngừn maỷch xung kờch:
909,81177,32.8,1.2IK2i
3Nxkxk
==

=

(kA)
( )
909,48177,32.52,1I1K21I.qI
3
N
2
xk3Nxk
==

+=

=

(kA)

e. ióứm ngừn maỷch N
'
5
: Sồ õọử thay thóỳ : Hỗnh IV.2.7
SVTH: Mai Haỷi An Trang42
009,0
16
X
04,0
15
X
294,0
14
X

817,0
9
X
294,0
11
X
131,0
8
X
817,0
12
X
138,0
5
X
138,0
6
X
138,0
7
X
179,0
1
X
179,0
2
X
179,0
3
X

0
10
X
0
13
X
1
E
2
E
3
E
H
'
5
N
Hỗnh IV.2.7

317,0XXX
5117
=+=
317,0XXX
6218
=+=
317,0XXX
7319
=+=
1057,0
3
317,0

X//X//XX
19181721
===
147,0
2
294,0
X//XX
141122
===
049,0XXX
161523
=+=

278,0XXX
82233
=+=
- Bióỳn õọứi Y( X
21
, X
23
, X
33
) sang ( X
34
, X
35
)

456,0
1057,0

278,0.049,0
278,0049,0
X
XX
XXX
21
3323
332334
=++=

++=

983,0
049,0
278,0.1057,0
278,01057,0
X
XX
XXX
23
3321
332135
=++=

++=
Tờnh doỡng ngừn maỷch:
- Doỡng ngừn maỷch do caùc maùy phaùt cung cỏỳp:

03,2
100

75,683
984,0
S
S
XX
cb
õmF
35tt
=

==


Tra baớng õổồỡng cong tờnh toaùn xaùc õởnh õổồỹc bọỹi sọỳ thaỡnh phỏửn chu kyỡ cuớa
doỡng ngừn maỷch:
I
ckt o
= 0,495; I
ckt

= 0,523.
cbII
õmF
cktcktF
U3
S
IIII

==

-Doỡng ngừn maỷch do hóỷ thọỳng cung cỏỳp:
SVTH: Mai Haỷi An Trang43
H
049,0
23
X
1057,0
21
X
123
E
278,0
33
X
'
5
N
H
123
E
984,0
35
X
'
5
N
456,0
34
X

H
049,0
23
X
147,0
22
X
123
E
1057,0
21
X
'
5
N
131,0
8
X
0592,12
456,0
499,5
I
X
1
I
cbI
34
NH
===
(kA)

- Doỡng ngừn maỷch 3 pha taỷi N
2
:
673,170592,12
5,103
75,683
495,0I
U3
S
II
NH
cbI
õmF
0ckt
N
'
5
=+


=+

=


(kA)
99,170592,12
5,103
75,683
523,0I

U3
S
II
NH
cbI
õmF
ckt
N
'
5
=+


=+

=



(kA)
- Doỡng ngừn maỷch xung kờch:
988,44673,17.8,1.2IK2i
'
5
N
xkxk
==

=
(kA)

( )
863,26673,1752,1I1K21I.qI
'
5
'
5
N
2
xk
N
xk
==

+=

=
(kA)

g.ióứm ngừn maỷch N
4
. Tổỡ sồ õọử tờnh toaùn ngừn maỷch ta coù:

'
3
N
3N4N
III +=
- Doỡng ngừn maỷch 3 pha taỷi N
4
:

359,62117,32242,30III
'
3
N
3N4N
=+=

+

=

(kA)

518,43084,33434,10III
3
N3N4N
=+=+=



(kA)
- Doỡng ngừn maỷch xung kich:

( )
( )
597,163909,81688,81NiNii
3xk3xkxk
=+=

+=
(kA)

( ) ( )
203,98909,48294,49NINII
3xk3xkxk
=+=

+=
(kA)

h.ióứm ngừn maỷch N
6
. Tổỡ sồ õọử tờnh toaùn ngừn maỷch ta coù:

( )
'
55N6N
NIII +=
- Doỡng ngừn maỷch 3 pha taỷi N
6
:

915,47673,17242,30III
5
N
5N6N
=+=

+

=


(kA)

424,2899,17434,10III
5
N5N6N
=+=+=



(kA)
- Doỡng ngừn maỷch xung kich:

( ) ( )
676,126988,44688,81NiNii
'
5xk5xkxk
=+=+=
(kA)

( )
( )
157,76863,26294,49NINII
'
5xk5xkxk
=+=+=
(kA)

k. ióứm ngừn maỷch N
7
. Sồ õọử thay thóỳ: Hỗnh IV.8
SVTH: Mai Haỷi An Trang44
009,0
16
X
04,0
15
X
294,0
14
X
817,0
9
X
294,0
11
X
131,0
8
X
817,0
12
X
179,0
4
X
138,0
5

X
138,0
6
X
138,0
7
X
179,0
1
X
179,0
2
X
179,0
3
X
0
10
X
0
13
X
1
E
2
E
3
E
4
E

H
7
N
Hỗnh IV.8

317,0XXX
5117
=+=
317,0XXX
6218
=+=
317,0XXX
7319
=+=
31,0XXX
8420
=+=
1057,0
3
317,0
X//X//XX
19181721
===
147,0
2
294,0
X//XX
141122
===
049,0XXX

161523
=+=
- Bióỳn õọứi (X
20
, X
21
, X
22
) sang Y(X
36
, X
37
, X
38
)
0582,0
147,01057,031,0
1057,0.31,0
XXX
XX
X
222120
2120
36
=
++
=
++

=

0276,0
147,01057,031,0
147,0.1057,0
XXX
XX
X
222120
2221
37
=
++
=
++

=
081,0
147,01057,031,0
31,0.147,0
XXX
XX
X
222120
2022
38
=
++
=
++

=

0766,0XXX
372339
=+=
898,0XXX
123840
=+=

- Bióỳn õọứi Y( X
36
, X
39
, X
40
) sang ( X
41
, X
42
)

1565,2
0582,0
898,0.0766,0
898,00766,0
X
XX
XXX
36
4039
403941
=++=

++=
SVTH: Mai Haỷi An Trang45
H
7
N
049,0
23
X
147,0
22
X
123
E
4
E
1057,0
21
X
31,0
20
X
817,0
12
X
H
7
N
049,0
23

X
0582,0
36
X
1234
E
081,0
38
X
0276,0
37
X
817,0
12
X
H
1234
E
7
N
1565,2
41
X
6385,1
42
X