Subsynchronous Oscillations (SSO) WECC_ERCOT_Presentation
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Transcript of Subsynchronous Oscillations (SSO) WECC_ERCOT_Presentation
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7/25/2019 Subsynchronous Oscillations (SSO) WECC_ERCOT_Presentation
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Subsynchronous Oscillations (SSO)
and PowerWorld Applications at
ERCOT
Anuj Dixit and Priya Ramasubbu
ERCOT Planning and Grid Co-ordination
May 21, 21!
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The Electric Reliability Council of
Texas (ERCOT)
" ERCOT ISO manages the fow o electricpower to 23 million Texas customers -
representing 8 percent o the state!selectric loa"#
" $erorms %nancial settlement or the
competiti&e wholesale 'ul(-power mar(et" Ena'les retail electric choice or Texas
customers2
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$resentation Outline
" )CRE* +etwor( an" Resonance
" ,hat causes SSO
" Stu".ing an" $re&enting SSO
" /ow "oes this impact
transmission planning an"operations
" $ower,orl" 0pplications
)Competiti&e Renewa'le Energ.*one
#
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efinition
Co!petiti"e Renewable Ener#y $one$ a
g%ogra&'i( ar%a in t'% stat% o) T%xas initially
id%nti)i%d by A*+ Tru%ind as ERCOT.s
(onsultant/ as an ar%a suitabl% )or multi&l%
1 M* ind d%0%lo&m%nt &roj%(ts O) t'%
original 2 3on%s t'% Publi( 4tility
Commission P4C/ ('os% a small s%t bas%don in&ut )rom &ot%ntial ind)arm d%0%lo&%rs
!
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CRE5 Ar%as
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What and Where
6% CRE5 #!78 lin%s built bot' insid%ERCOT load-s%r0ing ar%as and )ar into
ar%as '%r% load is s%r0%d by +PP
CRE5 ill not add any n% (onn%(tionsb%t%%n ERCOT and +PP
CRE5 ar%as ar% Pan'andl% A, Pan'andl%9, C%ntral, *%st, and M(Cam%y
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CRE5 #!78 ;in%s
?>?21# 1!
South Texas SSR E"ent (&'')
" +%ri%s (a&a(itors install%d on long #! 78 lin%s to allo
)ull loading
" 1, M* o) ind )arms (onn%(t%d to Ajo
#! 78 s%ri%s
(om&%nsat%d lin%s
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%ntroduction to Subsynchronous Oscillations
>?>?21# 1
" *ind )arms ar% 0uln%rabl% to ++O du% to n%arby
s%ri%s (a&a(itors" 4nd%rstanding and analysis t%('niJu%s 'a0%
ad0an(%d (onsid%rably
" *ind )arms ar% no routin%ly analy3%d )or ris7
" AEP r%sol0%d t'is &robl%m by installing
&rot%(tion to automati(ally tri& t'% ind )armK
essons earned * South Texas &''
K T'is solution as sit%-s&%(i)i( Fn ot'%r lo(ations, &rot%(ti0% tri&&ing may not
b% a&&ro&riat% as a )irst d%)%ns%
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,hoBs 0t Ris( -- 6eneral O'ser&ations
" 9ore Ris( or SSO$ Electricall. closer to series capacitors#$ 7ong shat multi-mass generators Coal> +6
Steam> Com'ine" C.cle5#
" 7ess Ris($ /."ro> CTs> reciprocating engines#$ Solar in&erters#$ /?DC ties#
" 1ecause SSO is a concern or all generationtechnologies> all generators are re&iewe"#ERCOT noti%es "e&elopers whose units might'e at ris(#
1:
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$resentation Outline
" CRE* +etwor( an"
Resonance
" ,hat causes SSO
" Stu".ing an" $re&enting SSO
" /ow "oes this impacttransmission planning an"operations
" $ower,orl" 0pplications
" Conclusion#
1 thus less
power will fow on line an" more onneigh'oring lines5#
" 1us &oltages ma. change '. N3#
" 0 new &oltage sta'ilit. limit ma. appear#
" 1ecause o this> it is recommen"e" to runan ST+ET an" possi'l. ?S0T stu". 'eore
'.passing#$ Some generation a"Pustments ma. 'e
necessar. e#g# win" curtailment5##1
Example Displa. SSR 0larm
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Example Displa. K SSR 0larm
+our(%@ ERCOT Ad0an(%d 6%tor7 A&&li(ations#2
Example Displa. SSR 0larm cont
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Example Displa. K SSR 0larm cont#
+our(%@ ERCOT Ad0an(%d 6%tor7 A&&li(ations##
Example Displa. SSR Details
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Example Displa. K SSR Details
+our(%@ ERCOT Ad0an(%d 6%tor7 A&&li(ations#!
Example Displa. K SSR 0ctions
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Example Displa. K SSR 0ctions
+our(%@ ERCOT Ad0an(%d 6%tor7 A&&li(ations#
$resentation Outline
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$resentation Outline
" CRE* +etwor( an"
Resonance
" ,hat causes SSO
" $re&enting SSO
" /ow "oes this impacttransmission planning an"operations
" $ower,orl" 0pplications
#:
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ERCOTSyste!Plannin#
" ERCOT &lanning &%r)orms (oordinat%d &lanning studi%s it' in&ut
)rom 6ERC r%gist%r%d Transmission Plann%rs TPs/, Transmission
On%rs TOs/ and ot'%r sta7%'old%rs to addr%ss r%gion-id%
r%liability and %(onomi( transmission
" P%r)orms transmission studi%s?ass%ssm%nt bot' n%ar-t%rm and
long-t%rm &lanning 'ori3on/ to m%%t ERCOT and 6ERC standards
TP;-1-!, PRC-2#, HAC-1#/
" Ass%ss%s r%sour(% a0ailability o) %xisting units and )utur%g%n%rators
" ;oad )or%(asting )or t'% n%ar-t%rm and long-t%rm Planning ori3on#
