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RELIABILITYEVALUATION OF GRID
CONNECTED PVSYSTEM
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INTRODUCTION
PV systems does not involve!een"o#se $s emissions $nd no %ossil
%#el &ons#m'tion(
Tot$l &$'$&ity o% !id &onne&ted PVsystem in&!e$sed %!om )**m+ in ,***to ,-G+ in ,*-*
Ann#$l !o.t" !$te in&!e$sed %!om /*0in ,**1 to 2*3 4*0 in ,*--
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FEATURES OF 5IG5LYRELIABLE PV SYSTEM In&!e$se in !ene.$6le ene!y o#t'#t
G#$!$ntee "i"e! !et#!n on investment
C#!t$il &$!6on emissions
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RELIABILITY
me$s#!e o% ove!$ll '!od#&t "e$lt" ove!t"e e7'e&ted li%etime o% t"e '!od#&t
Con&e!ned .it" '!o6$6ility $nd%!e8#en&y o% %$il#!es
D#!$tion o! '!o6$6ility o% %$il#!es #nde!
st$ted &ondition
E7'!essed $s '!o6$6ility ove! $ iven'e!iod o% time
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RELIABILITY EVALUATIONSTEPS Reli$6ility modellin o% PV system
&om'onents
Reli$6ility ev$l#$tion o% PV $!!$y
Dis&!ete '!o6$6ility dist!i6#tion o% in'#t'o.e!
PV !eli$6ility indi&es
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RELIABILITY EVALUATIONOF PV INVERTERT"e!m$l model o% IGBT $nd diode
F$il#!e !$tes o% IGBT
F$il#!e !$tes o% diode
F$il#!e !$tes o% &$'$&ito!
Inve!te! !eli$6ility
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T5ERMAL MODEL OF IGBTAND DIODETem'e!$t#!e !ise in IGBT $nd diode
9TIGBT3loss :
--PIGBT3loss ;-,PDiode3loss
9TDiode3loss:,-PIGBT3loss ;,,PDiode3loss
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FAILURE RATE OF IGBT
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FAILURE RATE OF IGBT F$il#!e !$te is !el$ted to
Po.e! loss
System 'o.e! in'#t levels
Tem'e!$t#!e de'ends on
Po.e! loss ."i&" in t#!n de'ends onsystem in'#t 'o.e! levels
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FAILURE RATES OF DIODE
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FAILURE RATES OFCAPACITOR
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INVERTER RELIABILITY
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INVERTER RELIABILITYContd((
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RELIABILITY EVALUATIONOF PV ARRAY E8#iv$lent !eli$6ility '$!$mete!s o% PV
st!in
St$te en#me!$tion %o! !eli$6ility $n$lysiso% PV $!!$y
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E?UIVALENT RELIABILITYPARAMETERS OF PVSTRING PV st!in "$s t.o !e'$i!$6le %$il#!e
modes
$( F$il#!e $t $ @#n&tion 6o7
6( S"o!t &i!it o% PV '$nel
Bot" !es#lt in o#t$e o% ."ole st!inT.o modes $!e &"$!$&te!ised 6y $n
$ve!$e %$il#!e !$te $nd $n $ve!$e!e'$i! !$te o% PV '$nel
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E?UIVALENT RELIABILITYPARAMETERS OF PVSTRING
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STATE ENUMERATION FOR
RELIABILITY INDICES
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DISCRETE PROBABLITYDISTRIBUTION OF INPUTPO+ER In'#t 'o.e! is mete!ed eve!y -3-
min#tes
It '!od#&es $ &"!onoloi&$l inte!mittent!ve .it" l$!e $mo#nt o% d$t$ 'oints
In'#t 'o.e! me$s#!ement $!e
$!e$ted into dis&!ete '!o6$6ilitydist!i6#tion
me$n &l#ste!in met"od isint!od#&ed
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3MEAN CLUSTERING
MET5OD
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3MEAN CLUSTERINGMET5ODContd((
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PV RELIABILITY INDICES Ev$l#$te system 'e!%o!m$n&e
Sele&t 6est desin o'tion $t 'l$nninst$e
To !ed#&e &ost $nd in&!e$se 6enet $to'e!$tion$l st$e
T.o ty'es ene!y o!iented $nd timeo!iented indi&es
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ENERGY ORIENTEDINDICES
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EPECTED OUTPUTENERGY=EOE>
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ENERGY AVAILABILITY
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TIME ORIENTED INDICES
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AVAILABLE DERATEDAND OUTAGE 5OURS
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CONCLUSIONM$@o! &ont!i6#tions o% '!o'osed ne.
$n$lyti&$l met"ods in&l#de
In'#tH'o.e! lossHtem'e!$t#!ede'endent %$il#!e !$tes %o! 'o.e!ele&t!oni& &om'onents
Ev$l#$tion o% PV $!!$ys &onside!in'o.e! o#t'#t3de'endent %$il#!e !$tes
A''li&$tion o% &l#ste!in te&"ni8#e tot"e dis&!ete '!o6$6ility dist!i6#tion
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REFERENCES Pen "$nY$n +$nIEEE
t!$ns$&tions on s#st$in$6le
ene!yvol()no()@#ly ,*-,
< L S$.in $nd E(M$!tinot!ene.$6les,*-* lo6$l st$t#s !e'o!t !ene.$6leene!y 'oli&y net.o!J %o! ,-st&ent#!y,*-*
A(Risto.M(Beovoi&A('!eel@iKDevelo'ment o% $
met"odoloy %o! im'!ovin '"otovolt$i&inve!te! !eli$6ilit IEEE
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REFERENCES PV Systems !eli$6ilityIEEE
t!$ns$&tions,**2
Roy BillintonRon$ld(A(All$n!eli$6ilityev$l#$tion eninee!in systems
+illi$m DensonReli$6ility $ssessment
o% &!iti&$l ele&t!oni& &om'onents IT!ese$!&" instit#te
T V!$n$A
