Phần 25 KHÓA ĐÀO TẠO TÍNH TOÁN ỔN ĐỊNH VÀ ỨNG DỤNG TRÊN 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
15
-
Case Study
–
IEEE 24 Bus Test System
Day

15

-
Case

Study

–
IEEE

24

Bus

Test

System
PART 3
July 24, 2013Prepared by: Frida Ceja-Gomez

eBook for You
2
OUTLINE
•
PV Analysis
PV

Analysis
• QV Analysis
• Long Term Stability
•
Small Signal Stability
•
Small

Signal

Stability
eBook for You
3
IEEE 24
–
PV
ANALYSIS
IEEE

24

–
PV

ANALYSIS
eBook for You
4
PV ANALYSIS
PV Analysis
• Remember that
PV analysis is
not part of the
dynamic
dynamic

analysis, so use
the non-
converted
saved case file
• We will study
the power
the

power

transfer from
Area 2 to Area 1
eBook for You
PV Distribution
5
PV ANALYSIS
PV

Distribution

Factor File Input
• Use the
subsystem file
created for N-1
contingency
contingency

analysis
• Prepare a
monitoring file
as shown here
•
Prepare a
•
Prepare

a

contingency file
to study the
loss of each
one of the
transformers
eBook for You
6
PV ANALYSIS
PV Analysis
• Go the PV
Analysis

window and
create the
create

the

distribution
factor file
• Make sure to
choose the
right settings
• Select the
source and sink
subsystems
eBook for You
7
PV ANALYSIS
PV Analysis Results
• Plot the
interface flow
for each
contingency
contingency
• What is the
maximum
power
transfer from
Area 2 to Area
1 for each
1

for

each

case?
eBook for You
8
PV ANALYSIS
PV Analysis Results
• Now verify the
voltage at bus 14 for
each of the studied
contingencies
contingencies
• What is the point of
voltage collapse for
each case?
• Which one seems to
be the worst
be

the

worst

contingency?
eBook for You
9
PV ANALYSIS

PV Analysis Results
• Build a case with the lowest maximum transfer between the two
areas using
“
Implement PV transfer
”
areas

using

Implement

PV

transfer
• Convert the case and prepare for dynamic simulation
• Monitor machine angles and bus voltages
• Initialize
• Run for 1 second
•
Apply a bus fault on one side of the selected transformer
Apply

a

bus

fault

on

one

side

of

the

selected

transformer
• Clear after 5 cycles by tripping the transformer
• Run for 10 seconds
eBook for You
10
IEEE 24
–
QV
ANALYSIS
IEEE

24

–
QV
ANALYSIS
eBook for You
11
QV ANALYSIS

QV Analysis
• Recall that QV
analysis is not
part of the
dynamic analysis,
so use the non
-
so

use

the

non
-
converted saved
case file
• We will perform
the QV analysis at
Bus 11
• Use the same
distribution factor
file used in PV
analysis
eBook for You
12
QV ANALYSIS
QV Analysis Results
• How much
reactive power is

needed to keep
the voltage at
1pu for each
case?
• Do the curves
have any
have

any

unstable areas
for any of the
studied
studied

contingencies?
eBook for You
QV Analysis
13
QV ANALYSIS
QV

Analysis

Results
• Now perform
QV analysis for
Bus 9
Bus

9
• Analyze the
results
• Is reactive
compensation
needed?
eBook for You
14
IEEE 24
–
LONG TERM
IEEE

24

–
LONG

TERM

STABILITY
eBook for You
On
load Tap Changer OLTC1
15
IEEE 24 – LONG TERM STABILITY
On
-
load

Tap

Changer

OLTC1

MdlOLTC1t i l l

M
o
d
e
l

OLTC1

t
yp
i
ca
l
va
l
ues
eBook for You
Maximum Excitation Limiters MAXEX1
16
IEEE 24 – LONG TERM STABILITY
Maximum

Excitation

Limiters

MAXEX1

M d l MAXEX1 t i l l

M
o
d
e
l

MAXEX1

t
yp
i
ca
l
va
l
ues
eBook for You
Steam Turbine and Boiler TGOV5
17
IEEE 24 – LONG TERM STABILITY
Steam

Turbine

and

Boiler

TGOV5
 Typical data for TGOV5
eBook for You
Underfre
q
uenc
y
Load Sheddin
g

18
IEEE 24 – LONG TERM STABILITY
qy g
Models (LDSH)
 Typical data for LDSHAL
eBook for You
Undervolta
g
e Load Sheddin
g
Models
19
IEEE 24 – LONG TERM STABILITY
gg

(LVSH)
 Typical data for LVSHAR
eBook for You
Under/Over Fre
q
uenc
y
Rela
y
Models
20
IEEE 24 – LONG TERM STABILITY
qyy
(FRQDCAT)
 Typical data for FRQDCAT
eBook for You
Under/Over Volta
g
e Rela
y
Models
21
IEEE 24 – LONG TERM STABILITY
gy
(VTGDCAT)
 Typical data for VTGDCAT
eBook for You
Long
Term Frequency Stability
22

IEEE 24 – LONG TERM STABILITY
Long
-
Term

Frequency

Stability
 Disable all voltage relays (loads and
t)
genera
t
ors
)
 Prepare for transient simulation and
choose the following channels
choose

the

following

channels
 Machine angles

Bus voltage

Bus

voltage

 Frequency deviation
 Pload
 Initialize and run until t = 2 seconds

Trip largest generation

Trip

largest

generation
 Run until t = 20 seconds
eBook for You
Long
Term Frequency Stability
23
IEEE 24 – LONG TERM STABILITY
Long
-
Term

Frequency

Stability
eBook for You
Long
Term Voltage Stability
24
IEEE 24 – LONG TERM STABILITY

Long
-
Term

Voltage

Stability
 Disable all frequency relays (loads and
t)
genera
t
ors
)
 Prepare for transient simulation and
choose the following channels
choose

the

following

channels
 Machine angles

Bus voltage

Bus

voltage

 Frequency deviation
 Pload
 Initialize and run until t = 2 seconds

Scale
all loads by 300 MW

Scale
all

loads

by

300

MW
 Run until t = 200 seconds
eBook for You
Long
Term Voltage Stability
25
IEEE 24 – LONG TERM STABILITY
Long
-
Term

Voltage

Stability

eBook for You