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PERFORMANCE EVALUATION AND
IMPROVEMENT IN TRANSIENT
INSTABILITY OF IEEE 9 BUS SYSTE
USING EXCITER AND GOVERNOR
CONTROL
Divya Asijaa, Pallavi Choudekarb, Ruchirac, Malvika Choa,b,c,dAmity University Uttar Pradesh
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Objective
I. Load flow analysis of IEEE 9 bus test system.II. Transient Analysis by initiating short circuit fault.
III. Transient instability improvement with the application of
Excitation System.
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Power System Stability
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Load Flow Analysis of IEEE 9 bus test syst
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Generator and Load data of IEEE 9 bus Test System
!ondition
S" o" ame of
Gen
Generator
#$
Generator
#var
#%A A%&
' ' '()"*9 '9'"'9 '++ ,es
* - )- .-"'( '++ o
/ 9 0+"+0 /0 '++ o
S" o" ame of
Load
Load
#$
Load
#var
#%A
' / '+'"1- /-"19 '+0"1
* ( '*+"0 1)"' '*9"9
/ 0 9'"'' /+"/( 9("+
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S" o" ame of
2us
om 3% P4 volt %olt 53%6 An7le
' ' ') ' ') 9"
* * */+ +"))(// *+/")-- /"
/ / */+ +")'*)9 ')("91( .+
1 1 */+ +"00*00 '00"0/) '"
- - '/") +"0((+) '+"-00* ("
( ( */+ +"01/)' '0'"+0( .0
0 0 */+ +"0+0)* '(*"09) .9
) ) */+ +"0-1*) '0'"1'1 .(
9 9 '("- +"00'+) '*"0*/ .*
2us 8ata of IEEE 9 bus Test System in ormal !o
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#ecanical In:ut of Gen;'< Gen;- and Gen;9 vs" time &eactive :ower of Gen;'< Gen;- and
=uantitative &e:resentation of IEEE 9 bus Test Sy
Steady State !ondition
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2us %olta7e of Gen ;'< Gen;- and Gen; 9 vs" time Fre>uency of Gen ;'< Gen;- and Gen
Field %olta7e of Gen ;'< Gen;- and Gen; 9 vs" time &otor An7le of Gen ;'< Gen;- and Ge
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Stability Problem
I. Transient Stability
II. oltage Stability
III. Long Term and !id Term Stability
The transient stability is the ability of the power syste
maintain synchronism when sub"ected to severe tran
disturbances.E?am:les@ Transmission line faults.
Sudden large load change.
line tripping.
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Load flow &esults durin7 te faulty conditio
#ecanical In:ut of Gen;'< Gen;- and Gen;9
vs" time
&eactive :ower of Gen;'< Gen;- and G
time
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2us %olta7e of Gen ;'< Gen;- and Gen; 9 vs"time S:eed of Gen ;'< Gen;- and Gen; 9
Field %olta7e of Gen ;'< Gen;- and Gen; 9 vs"
time
&otor An7le of Gen ;'< Gen;- and Ge
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=uantitative value of IEEE 9 bus test system in Tr
condition
o of
7enerator
% 5Pu6 &otor An7le #ecanical
In:ut
Terminal
#var
Field
%olta7e
Accel
#$
T
' +"9-/- */"(*9 '()"*9 '/-"(1 '"1*1' '*"-(
- +"0*'9 **"((- )- ()"1( +"0)1( ("1)
9 +"-00' 9"10) 0+"+0 -("*- +"))-9 '*"/0
#enerator $ata of IEEE 9 bus test system in transient condition
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2us data of IEEE 9 test bus system
2us o" %5:u6 An7le 5de76 Fre>uency Total Load
#$
Total Loa
#var
'
+"9-/-
'+")( -0"/-(
* +")*+* 1"(1 -0"/-1
/ +"0-'* +"-0 -0"/-* )("(1 /)"/'
1 +"0'*( *"99 -0"/10
- +"0*'9 0"1( -0"/1/( +"('19 .1"+9 -0"/-( (("'1 **"+-
0 +"(+/* .("/' -0"/-/ )*"-+ /*")(
) +"(+-* ./"1+ -0"/-(
9 +"-00' +"(+ -0"/-9
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Im:rovement of system stability wit te el: of G
#odel !lass Object Ty:e Active Fully Su::orted
#acine #odel G!LS / ,es
GO%E&O& ,GO% ' ,es
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=ualitative &e:resentation of IEEE 9 bus test syste
of Governor
#ecanical In:ut of Gen;'< Gen;- and Gen;9 vs"
time&eactive Power of Gen;'< Gen ;
vs" time
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2us %olta7e of Gen;'< Gen ;- and Gen;9 vs" time S:eed of Gen;'< Gen ;- and Gen;9
Field %olta7e of Gen;'< Gen ;- and Gen;9 vs" time &otor An7le of Gen;'< Gen ;- and Ge
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o" of
Gen
% 5Pu6 &otor
An7le
#ecanical
In:ut
Terminal
#var
Field
%olta7e
Accel
#$ Te
' +"9/-/ *)"1(* '()"*9 *''"1' '"1*1' /"*9 '
- +"0+*( /+"*9* )-"++ '("'' +"0)1( .-"00
9 +"-(9( .*"9)' '-"++ )9"9+ +"))-9 1"/9
Generator data of IEEE 9 bus test system in trancondition
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2us o" %5:u6 An7le 5de76 Fre>uency Total Load
#$
' +"9/-/ '-"1' -1")1/
* +")++/ )"'9 -1")1-
/ +"0/*+ 1"/1 -1")1) )*"*(
1 +"(9*( 0"'+ -1")-*
- +"0+*( '*")* -1")-0
( +"-919 .-"/+ -1")11 ('"0)
0 +"-)*9 .-"9/ -1")10 00"*+
) +"-)00 .-"/0 -1")11
9 +"-(9( .-"') -1")1*
2us data of IEEE 9 bus test system in transient co
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Im:rovin7 metod usin7 of i7 E?citation System
#odel !lass Object Ty:e Active Fully Su::orted
#acine #odel G!LS / ,es
E?citer A!02 ' ,es
StabiliBer PSS'A ' ,es
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#ecanical In:ut of Gen;'< Gen;- and Gen;9 v time &eactive :ower of Gen;'< Gen;- and G
=uantitative &e:resentation of IEEE 9 bus system usin7 of
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Field %olta7e of Gen;'< Gen ;- and Gen;9 vs" time &otor An7le of Gen;'< Gen ;- and
2us %olta7e of Gen;'< Gen ;- and Gen;9 vs" time S:eed of Gen;'< Gen ;- and Gen
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o of
Gen
% 5Pu6 &otor
An7le
#ecanical
In:ut
Terminal
#var
Field
%olta7e
Accel
#$ T
' +"9)/0 *0"0/+ '(1"+/ '(0"0+ '"*+/0 .*")0
- +"))0- '0")'9 )-"++ )*"/9 +"9+)( *"9-
9 +"9(+9 *"/09 0+"+0 0+"*( '"0)*- +"'-
Generator data of IEEE 9 2us test system usin7 of ESystem
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2us o" %5:u6 An7le 5de76 Fre>uency Total Load
#$
Total
#v
' +"9)/0 ''"*) 19"00+
* +"9/(1 1"01 19"00+
/ +")9/) '"'+ 19"00' 90"1) /1"
1 +")))( *"-* 19"00*
- +"))0- ("+/ 19"00/
( +")9(* .1"0+ 19"0() )-")) *)"
0 +")(1- .-"-' 19"0(9 ''*")/ 11"
) +"9+(0 .1"/' 19"0(0
9 +"9(+9 .*"// 19"0((
2us data of IEEE 9 2us test system usin7 of E?ciSystem
&esults and 8iscussion
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&esults and 8iscussion
$ata of generators in the case of steady state
o" of
GE
#ecanical
in:ut
#var Field
%olta7e
&otor
An7le
#$
GE.' '()"*9 '9'"9+ '"1*1' */"(*/ '()"*9
GE.- )- .-"'( +"0)1( **"()) )-
GE.9 0+"+0 /0"++ +"))-9 9"- 0+"+0
o" of
GE
#ecanical
in:ut
#var Field
%olta7e
&otor
An7le
#$
GE.' '()"*9 '/-"(1 '"1*1' */"(*/ '/-"(1
GE.- )- ()"1( +"0)1( **"()) ()"1)
GE.9 0+"+0 -("*- +"))-9 9"- -+"*-
$ata of generators in the case of transient condition
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o" of
GE
#ecanical
in:ut
#var Field
%olta7e
&otor
An7le
#$
GE.' '()"*9 *''"1' '"1*1' *)"1(* '-+"1
GE.- )- '("'' +"0)1( /+"*9* )*"01
GE.9 '- )9"9+ +"))-9 .*"9)' 9"(0
o" of
GE
#ecanical
in:ut
#var Field
%olta7e
&otor
An7le
#$
GE.' '(1"+/ )/"90 '"*+/0 *0"0/+ '(0"0
GE.- )- +")0 +"9+)( '0")'9 )*"/9
GE.9 0+"+0 /9'")0 '"0)*- *"/'09 0+"*(
$ata of generators %sing of #overnor
$ata of generators %sing of the Excitation system
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!onclusion
&ower system has been compared using three cases that are &re 'au
'ault( and After 'ault. The third case has two type )Type * and Type
first governor is used for fre,uency control and improve the transient
and type + use the excitation system for improving the system instabi&re 'ault condition( we are getting the power -+-.- !/( which i
mechanical input. After introducing fault the generated power decre
-+-.- to +01.-2. In the case of governor( speed can be easily
compare the others case and In this case of governor( we are getting
+1+.3+ !/. $uring the 'ault( power has been decrease and this powe
been improved by using the excitation system which will result into
generated power 4-+5.-0!/6 which is approximately e,ual to -+-.-
fault condition6. So it is concluded that during the fault if we are
excitation system( then we can easily control the voltage and system p
can protect the whole system from transient instability.
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Future As:ects
It is observed that the transient stability improvement m
utili7ing &S8based algorithm can be implemented in fututhe similar case further employing :S';Ls with si7es
locations results from the optimi7ation algorithm will fu
improve the transient stability of the power system under
and for the considered fault.
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TA3,O4