TRANSMISSION &
DISTRIBUTION
A Division of Global Power
POWER SYSTEM STABILITY CALCULATION TRAINING
D10
12
Si l ti f D i E t
D
ays
10
-
12
-
Si
mu
l
a
ti
on o
f

D
ynam
i
c
E
ven
t
s
December 2, 2013Prepared by: Mohamed El Chehaly
eBook for You

LINH & TAN DINH
eBook for You
Slider Diagram
4
SCENARIO 1
Slider

Diagram
eBook for You
Load Flow
5
SCENARIO 1
Load

Flow
 N-0:

Line DI LINH
TAN DINH (4020
4100)

Line

DI

LINH

–
TAN


N
-
1:

 System collapse
 One of the most severe contin
g
encies
g
 Special protection scheme is employed
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Special Protection Scheme
6
SCENARIO 1
Special

Protection

Scheme
 If the voltage at PHU LAM 500 (4400) is
less than 400 kV (0 8
pu
) for 0 5 seconds
less

than

400

kV

42

MW)

 Trip 2 auto-transformers at LONG AN 2
 If
t
h
e
v
o
l
tage

at
PH
U
LAM
500

(
44
00)
i
s

t e o tage at U 500 ( 00) s
less than 430 kV (0.86 pu) for 5 seconds
 PLAM_T5 (bus 43678, load 43 MW)
 PLAM_T6 (bus 43688, load 42 MW)


LINH – TAN DINH (4020 – 4100) after 100 ms
 Sin
g
le-Line-to-Ground fault followin
g
b
y
a tri
p
of
g
gy p
line DI LINH – TAN DINH (4020 – 4100) after
100 ms (with and without auto-reclose)

TAN DINH (4100)

TAN

DINH

(4100)
 Three-phase fault following by a trip of line DI
LINH
–
TAN DINH (4020
–
4100) after 100 ms
LINH

Slider Diagram
9
SCENARIO 2
Slider

Diagram
eBook for You
Load Flow
10
SCENARIO 2
Load

Flow
 N-0:

Line PLEIKU
DI LINH (3300
4020)

Line

PLEIKU

–
DI

LINH

(3300


Scheme
 If the voltage at PHU LAM 500 (4400) is
less than 400 kV (0 8
pu
) for 0 5 seconds
less

than

400

kV

(0
.
8

pu
)

for

0
.
5

seconds

 PLAM_T5 (bus 43678, load 43 MW)


500

(
44
00)
i
s

t e o tage at U 500 ( 00) s
less than 430 kV (0.86 pu) for 5 seconds
 PLAM_T5 (bus 43678, load 43 MW)
 PLAM_T6 (bus 43688, load 42 MW)
 Trip 2 auto-transformers at LONG AN 2
eBook for You
Faults
12
SCENARIO 2
Faults
 PLEIKU (3300)

Three
phase fault following by a trip of line

Three
-
phase

fault

following

LINH

(4020)
 Three-phase fault following by a trip of line
PLEIKU
–
DI LINH (3300
–
4020) after 100 ms
PLEIKU

DI

LINH

(3300

4020)

after

100

ms
 Single-Line-to-Ground fault following by a trip of
line PLEIKU – DI LINH (3300 – 4020) after 100 ms
(successful and unsuccessful auto-reclose)
eBook for You
13
SCENARIO 3: FAULTS AT PHU


Line

PHU

LAM

–
DAK

NONG

(4400

–
3500)
 856 MVA (48.5%)

Low voltages at PHU LAM but above limits

Low

voltages

at

PHU

LAM


following loads
following

loads

 PLAM_T5 (bus 43678, load 43 MW)

PLAM T6 (bus 43688 load 42 MW)

PLAM
_
T6

(bus

43688
,
load

42

MW)

 Trip 2 auto-transformers at LONG AN 2
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Faults
17
SCENARIO 3
Faults
 PHU LAM (4400)

y
a tri
p
of
g
gy p
line PHU LAM – DAK NONG (4400 – 3500) after
100 ms (successful and unsuccessful auto-
reclose)
reclose)
 DAK NONG (3500)

Three
-
phase fault following by a trip of line PHU

Three
-
phase

fault

following

by

a

trip


Slider Diagram
19
SCENARIO 4
Slider

Diagram
eBook for You
Load Flow
20
SCENARIO 4
Load

Flow
 N-0:

Line O MON
NHABE (4750
4450)

Line

O

MON

–
NHABE

(4750


g
enc
y
that can lead to load tri
pp
in
g
in the
gy ppg
area
eBook for You
Faults
21
SCENARIO 4
Faults
 O MON (4750)

Three
phase fault following by a trip of line O MON

Three
-
phase

fault

following

by



(4750)
 Three-phase fault following by a trip of line O MON
–
NHABE (4750
–
4450)
after 100 ms
NHABE

(4750

4450)
after

100

ms
 Single-Line-to-Ground fault following by a trip of
line O MON – NHABE (4750 – 4450) after 100 ms
(successful and unsuccessful auto-reclose)
eBook for You
22
SCENARIO 5: TRIPPING OF
SCENARIO

5:

TRIPPING



52040
,
ID

1)
 Swing bus for the reduced system

P
GEN
=
360 MW (86% of MBASE)

P
GEN

360

MW

(86%

of

MBASE)
 3.2% of total generation in the region
 N-1:
 With correct re-dis
p
atch of the

S4

(52040)

following

by a trip of the generator after 100 ms
 Sin
g
le-Line-to-Ground fault PMY 1 S4
(
52040
)

g
__
()
following by a trip of the generator after 100 ms
(successful and unsuccessful auto-reclose)
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