TRANSMISSION &
DISTRIBUTION
A Division of Global Power
POWER SYSTEM STABILITY CALCULATION TRAINING
Day 4
-
Overview of the Vietnamese Power System
Day

4

-
Overview

of

the

Vietnamese

Power

System
November 21, 2012Prepared by: Frida Ceja-Gomez
eBook for You
2
OUTLINE
OifthVit P St
•
O
verv

A
na
l
ys
i
s
eBook for You
3
THE VIETNAMESE POWER
THE

VIETNAMESE

POWER

SYSTEM
Overview of the Vietnamese Power System
&
Load Flow Analysis
Load

Flow

Analysis
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Saved Case File and Slider File
4
THE VIETNAMESE POWER SYSTEM
Saved


sld
• The slider file only represents the 500kV
tiit
t
ransm
i
ss
i
on sys
t
em
eBook for You
The Vietnamese Power System
5
THE VIETNAMESE POWER SYSTEM
The

Vietnamese

Power

System
• High voltage
transmission at
transmission

at

500kV and 220kV
•


to

the

North

region
•
What can be said of this
•
What

can

be

said

of

this

region?
eBook for You
Region Totals
South
7
THE VIETNAMESE POWER SYSTEM
Region

Other

Countries
• Generate an inter-area flow re
p
ort for the links
p
with China, Laos and Cambodia
•
Is power imported from or exported to these
Is

power

imported

from

or

exported

to

these

countries?
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Running the Load Flow Simulation
10

fla
g
an
y

p
roblems?
gg ggyp
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Limit Checking Reports
12
LOAD FLOW ANALYSIS
Limit

Checking

Reports
•
V
erif
y
if there are an
y
branch overloads
yy
• At what voltage level are the overloads more severe?
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Pl i R li bilit C it i
13
N-1 CONTINGENCY ANALYSIS

y
if there are an
y
volta
g
e violations at the 500kV
yyg
level
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Limit Checking Reports
15
LOAD FLOW ANALYSIS
Limit

Checking

Reports
•
V
erif
y
if there are an
y
volta
g
e violations at the 220kV
yyg
level
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Limit Checking Reports

N
-
1

CONTINGENCY

ANALYSIS
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18
N-1 CONTINGENCY ANALYSIS
Preparing the input files for the DFAX file
• Create a subsystem file as shown below
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19
N-1 CONTINGENCY ANALYSIS
Preparing the input files for the DFAX file
• Create a monitoring file
• overloads on all branches
• the buses for each subsystem having a
volta
g
e below 0.9
p
u or above 1.1
p
u
gp p
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20
N-1 CONTINGENCY ANALYSIS

file
• Note that several contingencies create islands
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23
N-1 CONTINGENCY ANALYSIS
AC Contingency Solution
• Name the contin
g
enc
y
solution out
p
ut file and
gy p
solve
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AC C ti S l ti
24
N-1 CONTINGENCY ANALYSIS
AC

C
on
ti
ngency
S
o
l
u
ti