cascaded multilevel inverters with dc

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1/12/2015 1

K.S.R. COLLEGE OF ENGINEERING

(Autonomous)

MULTILEVEL INVERTERS WITH DC-DC CONVERTERBASED ON DEVELOED H-BRIDGE

ELECTRICAL AND ELECTRONICS ENGINEERING

!"s"nt"# $%

T.Anandkumar (1537001)

I-M.E(PED)

6/30/16 1



CONTENTS

• Objectie!

• Intr"ducti"n

• E#i!tin$ !%!tem

• Pr"&"!ed T"&"'"$%• Adanta$e!

• Draback!

• Out&ut "'ta$e!

• *a'cu'ati"n O+ ,"!!e!

• *"nc'u!i"n!

• e+erence!

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OB&ECTIVES

• *a!caded Mu'ti'ee' Inerter u!in$ dee'"&ed

-brid$e! inerter

• It re/uire! a 'e!!er number "+ dc "'ta$e

!"urce! and !itce!

• Dc !"urce i! $ien t" te uck- ""!t

c"nerter and it i! +ed t" Mu'ti'ee' Inerter

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INTRODUCTION

• Mu'ti'ee' inerter! are u!ed in i$ &"er

a&&'icati"n! .

• 2enerate a !te&&ed "'ta$e ae+"rm b% u!in$

it a number "+ dc "'ta$e !"urce!

• eed "+ +i'ter! i! reduced b% increa!in$ te

"'ta$e 'ee'

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• In i$ &"er a&&'icati"n!4 *a!caded inerter

can ea!i'% inter+ace it "'ar P m"du'e and

+ue' ce''!

• Adanta$e! !uc a! Im&r"e &"er /ua'it%4

reduce '"er "rder arm"nic!

*"ntinued6

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E'ISTING SSTEM

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CASCADE MULTILEVEL INVERTER

• % c"nnectin$ !eera' -brid$e inerter! in

!erie! t" &r"ide a !inu!"ida' "ut&ut "'ta$e

• Eac ce'' c"ntain! "ne -brid$e

•

Out&ut "'ta$e $enerated b% ti! mu'ti'ee'inerter i! actua''% te !um "+ a'' te "'ta$e!

$enerated b% eac ce''

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CASCADE MULTILEVEL INVERTER

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BUCK-BOOST CONVERTER

• uck-b""!t c"nerter &r"ide! an "ut&ut "'ta$e

can be eiter i$er "r '"er tan te in&ut

"'ta$e

• Te "ut&ut "'ta$e &"'arit% i! "&&"!ite t" tat "+

te !u&&'% "'ta$e

• Adanta$e "+ uck-b""!t c"nerter i! te

increa!ed e++icienc%

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BUCK-BOOST CONVERTER

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BUCK-BOOST DUT CCLE

• in(ma#) Ma#imum in&ut "'ta$e

• in(min ) Minimum in&ut "'ta$e

• "ut De!ired "ut&ut "'ta$e

• Dbuck Minimum dut% c%c'e +"r buck m"de

• Db""!t Ma#imum dut% c%c'e +"r b""!t m"de

• 8 E!timated e++icienc% at ca'cu'ated in4 "ut4 and I"ut

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ROOSED TOOLOG

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ROOSED SSTEM BLOCK

DIAGRAM

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SEVEN-LEVEL INVERTERS

ec"nd &r"&"!ed t"&"'"$% 9ir!t &r"&"!ed t"&"'"$%

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ROOSED TOOLOG

• % addin$ t" unidirecti"na' &"er !itce! and

"ne dc "'ta$e !"urce "btain Dee'"&ed -brid$e

inerter

• imu'tane"u! turn-"n "+ ,41 and ,4: "r 41 and

4: cau!e! te "'ta$e !"urce! t" !"rt-circuit

• And "'ta$e !"urce i! c"nnected it te D*-D*

c"nerter t" !te& u& and te& d"n te "'ta$e in&ut

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OUTUT VOLTAGES OF THE -

LEVEL INVERTERS

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WM ULSE SU*UENCE

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CALCULATING DUT CCLE

• A!!umin$ in a! :; D* and te ,ee' "+ te

inerter i! 17. "4 te Dut% c%c'e "+ te c"nerter i!

• i ". "+ Dut% c%c'e

• n ". "+ "'ta$e 'ee' re/uired

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ADVANTAGES

• ". "+ ,ee'! "+ te Dee'"&ed -brid$e Inerter i!

Increa!ed it reduced n". "+ "'ta$e !"urce and

!itc

• % can$in$ te !itcin$ dut% c%c'e "+ te

c"nerter te Out&ut "+ te c"nerter can be aried.

• De!ired "'ta$e ,ee' can be "btained b% u!in$

D*-D* c"nerter.

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DRAWBACKS

• "'ta$e i&&'e i! &re!ented in te Out&ut

<ae+"rm.

• 9"r i$er current ratin$4 *"n!tant '"ad i!

u!ed t" reduced te ri&&'e current

• i$er ri&&'e current i! &r"duced at te time "+

can$in$ te dut% c%c'e.

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OUTUT VOLTAGE

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BUCK BOOST OUTUT WAVEFORM

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DEVELOED H-BRIDGE INVERTER

WAVEFORM

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CALCULATION OF LOSSES

• Main'%4 t" kind! "+ '"!!e! c"nducti"n and

!itcin$ '"!!e! are a!!"ciated

• itce! inc'ude I2T! and di"de!

•

Te c"nducti"n '"!!e! "+ an I2T &c4I2T(t)and a di"de &c4D(t) are ca'cu'ated

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CONDUCTION LOSSES

• *"nducti"n '"!!e! "+ an I2T and a di"de are

ca'cu'ated a! +"''"!.

&c4I2T(t) I2T = I2Ti>(t)i(t)

&c4D(t) ?D = Di(t)@ i(t)

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AVERAGE

CONDUCTION OWER LOSS

• Aera$e a'ue "+ te c"nducti"n &"er '"!!

(Pc) "+ te mu'ti'ee' inerter can be ritten a!

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EFFICIENC OF THE INVERTER

• E++icienc% (8) "+ te inerter i! ca'cu'ated a!

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CONCLUSIONS

• arm"nic! i! reduced

•

% addin$ t" !itce! +"r -brid$e inerter!t" $enerate !een "'ta$e 'ee'!

•

*"m&ari!"n re!u't! !"!4 te &r"&"!edt"&"'"$% re/uire! a 'e!!er number "+ I2T!.

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REFERENCES

[1] E. Babaei and S. H. Hosseini, “Cha!e ba"an#e #on$o" %e$hods &oas'%%e$i#a"#as#ade %("$i"e)e" #on)e$es,* in Proc. ICEMS,Seoul, Korea, 2007, ++. 7479.

[2] -. an!, . i, . hen!, and . (, “o"$a!e ba"an#in! and(#$(a$ions(++ession %e$hods o& oa$in! #a+a#i$os in a ne%od("a %("$i"e)e" #on)e$e,* IEEE Trans. Ind. Electron., vol. 60,no. 5, pp. 19431954, a' 2013.

[3] . Ebahi%i, E. Babaei, and . B. haeh+e$ian, “ ne $o+o"o!' o&#as#aded %("$i"e)e" #on)e$es i$h ed(#ed n(%be o&#o%+onen$s &o hi!h:)o"$a!e a++"i#a$ions,* IEEE Trans. Po!erElectron., vol. "6, no. 11, ++. 31093118, ;o). 2011.

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REFERENCES

[4] . an<e=a and >. . i+o, “ h'bid %("$i"e)e" in)e$e $o+o"o!'&o di)e a++"i#a$ion,* in Proc. #PEC, 1998, ++. 523529.

[5] . ;ai%ani and . os#ho+o("os, “ no)e" sin!"e:s$a!e

%("$i"e)e" $'+e &("":bid!e #on)e$e,* IEEE Trans. Ind. Electron.,)o". 60, no. 1, ++. 31 42, an. 2013.

[6] ;. bd ?ahi%, . @. oha%ad E"ias, and. A. He, “>ansis$o

#"a%+ed H:bid!e based #as#aded %("$i"e)e" in)e$e i$h ne%e$hod o& #a+a#i$o )o"$a!e ba"an#in!,* IEEE Trans. Ind. Electron.,)o". 60, no. 8, ++. 2943 2956, (!. 2013.

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THANK OU

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