Phần 23 KHÓA ĐÀO TẠO TÍNH TOÁN ỔN ĐỊNH VÀ ỨNG DỤNG TRÊN DỤNG PHẦN MỀM PSSE CHO KỸ SƯ HỆ THỐNG ĐIỆN (Kịch bản nghiên cứu theo tiêu chuẩn IEEE trên Phần mềm PSSE)

TRANSMISSION &
DISTRIBUTION
A Division of Global Power
POWER SYSTEM STABILITY CALCULATION TRAINING
Day 12
-
Case Study
–
IEEE 24 Bus Test System
Day

12

-
Case

Study

–
IEEE

24

Bus

Test

System
PART 1
July 19, 2013Prepared by: Frida Ceja-Gomez
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2
OUTLINE
• Saved Case Build-up
Creating a
Single Line Diagram
•
Creating

a

Single

Line

Diagram
• Load Flow Anal
y
sis
y
• N-1 Contingency Analysis
• Short-Circuit Analysis
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3
IEEE 24
–
SAVED CASE
IEEE

24

–
SAVED

CASE

BUILD-UP
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Building a SAV file
4
SAVED CASE BUILD-UP
Building

a
.
SAV

file

• The
p
ur
p
ose of this exercise is to build a test case from
pp
scratch on PSS®E and then perform all the types of
analysis covered during Part A of this course
• We will build a 24-bus power system based on the IEEE
Reliability Test System 1996
T b i thi PSS®E t
Fil

N
d
•
T
o
b
eg
i
n
thi
s process, open
PSS®E
, go
t
o
Fil
e,
N
e
w
an
d

select Network Case
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Building a SAV file
5
SAVED CASE BUILD-UP
Building

a
.
SAV

file

• Leave the MVA Base as 100 and the frequency as 60Hz
• We will input the transformer ratings in MVA units
For non
transformer branches the current will be expressed as
•
For

non
-
transformer

branches

the

current

will

be

expressed

as

MVA
• The headin
g
lines are
j
ust to
p
rovide some information about
gjp
the new case
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Bus Data
6
SAVED CASE BUILD-UP
Bus

Data
• Use the followin
g

g
bus data as an
input
• Note the meaning
of each bus type
code
• 1 => PQ bus
•
2 => PV bus

•
2

=>

PV

bus
• 3 => Swing bus
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Branch Data
7
SAVED CASE BUILD-UP
Branch

Data
• The transmission line data for the IEEE 24-bus system can be found in
the table below
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Machine Data
8
SAVED CASE BUILD-UP
Machine

Data
• Our test s
y
stem has 10
g
enerators

yg
• Note that the machine at bus 13 will be the swing
generator
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GSU Transformer
9
SAVED CASE BUILD-UP
GSU

Transformer
• We will not model the generator step-up transformers explicitly
Enter
RTran
= 0 015pu and
Xtran
= 0 125pu for all machines
•
Enter

RTran
=

0
.
015pu

and

Xtran
=

0
.
125pu

for

all

machines
• These values are the step-up transformer impedance in pu on Mbase
• Leave Gentap = 1, which is the transformer off-nominal turns ratio in pu on
the system base
•
PSS®E assumes the GSU transformer has a delta
-
wye
configuration as
PSS®E

assumes

the

GSU

transformer

has

a

delta
wye
configuration
,
as

shown below
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Load Data
10
SAVED CASE BUILD-UP
Load

Data
• Add the followin
g
loads to their res
p
ective buses
gp
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11
SAVED CASE BUILD-UP
Two-Winding Transformer
Th IEEE 24 h h fi 230
138kV
•
Th

e
IEEE

24
test system
h
as t
h
e
fi
ve
230
-
138kV

transformers shown below
•
Note that these have a
Y
grounded
•
Note

that

these

have

a

Y
grounded

configuration on both sides
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12
SAVED CASE BUILD-UP
Transformer OLTC
• We will add an on-load tap changer to the two-winding
transformers
• The information for the OLTC of our 5 two-winding
transformers is shown below:
transformers

is

shown

below:
• Controlled Bus: LV side
•
Tapped: Yes
Tapped:

Yes
• Tap Positions: 17
• Control Mode: Voltage
• Auto-adjust: Yes
• Vmax = 1.05

• Vmin = 1.00
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13
SAVED CASE BUILD-UP
Fixed Shunt Data
• The system only has one fixed shunt
capacitor
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14
IEEE 24
–
CREATING A
SINGLE
IEEE

24

–
CREATING

A

SINGLE

LINE DIAGRAM
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Single Line Diagram
15
CREATING AN SLD
Single

Line

Diagram
• Go to the File
menu, click on
New and select
Diagram
• Click on the Auto
Draw option and
th li k th
th
en c
li
c
k
on
th
e
diagram
•
Select bus 10
•
Select

bus

10

and click OK

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Single Line Diagram
16
CREATING AN SLD
Single

Line

Diagram
• The buses
should appear
on the diagram,
as shown to the
right
• Note that with
th A t D
th
e
A
u
t
o
D
raw
Option it is
possible to grow
more than 1
more

than

1

level, but then
the diagram
becomes messy
becomes

messy
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Single Line Diagram
17
CREATING AN SLD
Single

Line

Diagram
• Re-order the
system as
shown to the
right by
• Rotating
elements
• Dragging
elements
• Inserting
knee points
in the lines
in

the

lines
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Single Line Diagram
18
CREATING AN SLD
Single

Line

Diagram
• Ri
g
ht-click on
g
Bus 11 and
select Grow N
levels
• Grow 1 level and
re-order the
lt
e
l
emen
t
s as
shown on this
picture

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Single Line Diagram
19
CREATING AN SLD
Single

Line

Diagram
• Ri
g
ht-click on
g
Bus 13 and
select Grow N
levels
• Grow 1 level and
re-order the
lt
e
l
emen
t
s as
shown on this
picture
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Single Line Diagram
20
CREATING AN SLD

Single

Line

Diagram
• Similarl
y,

g
row
y, g
buses 23, 20,
and 19
• The SLD
should look
like the one
htth
s
h
own
t
o
th
e
right
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Single Line Diagram
21
CREATING AN SLD
Single

Line

Diagram
• Now let us
g
row
g
Bus 9, then
Buses 3 and 1,
and finally Bus 8
• Remember that
you can make
th b l
th
e
b
uses
l
arger
so that the
elements are not
crowded
crowded
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Single Line
22
CREATING AN SLD
Single

Line

Diagram
• Now expand
Buses 24 and
15
• Then grow
Buses 16 and
Buses

16

and

17
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Sin
g
le Line
23
CREATING AN SLD
g
Diagram
• Finally, grow
Bus 22 one
level
• Now that we
have all the
have

all

the

elements,
reorganize
them to
them

to

optimize
space
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Adding a frame
24
CREATING AN SLD
Adding

a

frame
•
In the
Diagram
In

the

Diagram

Primitives tool
menu, select the
rectan
g
le o
p
tion
gp
shown below
• With this tool it is
possible to create a
ffth
f
rame
f
or
th
e
diagram as shown
to the right
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Inserting title and legend
25
CREATING AN SLD
Inserting

title

and

legend
•
In the
Diagram
tool
In

the

Diagram

tool

menu, use the Title
and Lgnd buttons
to add information
to the diagram
• Note that the font
color and size can
bdifidb
b
e mo
difi
e
d

b
y
right-clicking on the

title/legend and
selecting the
selecting

the

Properties option
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