International Joumals of Engineering & Sciences IJENS
EDITORS& REVIEWERS
Dr. Lu Jiang
Xi'anJiaotongUniversity,China
MuhammadYasir Qadri
University
of Essex,UK
WijayanayakeMudalige Janaka Indrajith Wijayanayake
VictoriaUniversity,Australia
Ah madA liA l-Zubi
King SaudUniversity,Kingdomof SaudiArabia
Dr.GhossoonMohammedWaleedAl_Saadoon
Schoo/of Computer& Communication
Engineering,
Malaysia
Dr.SerefAykut
BitlisErenUniversity,Turkey
Dr HelmiZulhaidiMohd Shafri
UniversityPutra,Malaysia
Prof. Dr. Y. M; lssa
CairoUniversity,Egypt
Dr. B. B. Arora
DelhiCollegeof Engineering,
lndia
AdeniyiSundayOgunlaja
Universityof Technology,Nigeria
MohamedFirdhous
of Moratuwa,SriLanka
University
Totok R. Biyanto
Engineering
PhysicsDepartment
- FTI - ITSSurabaya,lndonesia
S. Habib Kazemi
LasbsUniversity,
lran
Ayhan Kapusuzoglu
HacettepeUniversity,Turkey
Dr NasirM Mirza
PIEAS,Pakistan
Dr. FalahAlsaqre
GulfUniversity,
Kingdomof Bahrain
a
International Joumals of Engineering & Sciences IJENS
Dr.P. Vasant
UniversityTechnologyPetornas,Malaysia
Dr. ShahanawajAhamad
King SaudUniversity,
Kingdomof SaudiArabia
Dr.GhossoonM. WateedAl-saadoon
Universityof Malaysia,Malaysia
Dr. Wahied Gharieb
KingSaudUniversity,
Kingdomof SaudiArabia
Dr. Engr. Yasser Fouad
GermanUniversityin Cairo,Egypt
Dr. KayedAbu Safieh
Hashe.mite University, Jordan
Dr. MohammadArif Kamal
KingFahadUniversityof Petroleum& Minerals,SaudiArabia
Kamran Khowaja
lsraUniversity,Pakistan
Dr. Nafis Ahmad
BUET,Bangladesh
MirzaHasanuzzaman
Sher-e-BangIa Agricultural University, BangIadesh
Dr QaisarMahmood
COMSAISlnstituteof lnformationTechnology,
Pakistan
Dr. T. Joseph SahayaAnand
TechnicalUniversityof Malaysia,Malaysia
Dr. ErdalAkyol
Pamukkale University,Turkey
Dr. Debojyoti Mitra
SirPadampatSinghaniaUniversity,
lndia
Prof. U.G.Jha
Kanpurlnstituteof Technology,
lndia
Dr.AbdelmalekZidouri
KFUPM,SaudiArabia
NEETESHGUPTA
TlT,Bhopal,India
lll
47
International Journal of Electrical & Computer SciencesIJECS-IJENS Vol: l0 No: 06
Advanced Carrier BasedPulseWidth Modulation
in Asvmmetric CascadedMultilevel Inverter
Bambang Sujanarko
towardDoctor
currently
Jember,
Dept.of Elect.Eng.,Universitas
(ITS)Surabaya,
Indonesia
Nopember
Sepuluh
in InstitutTeknologi
Mochamad Ashari
Mauridhi Hery Purnomo
OntosenoPenangsang
Soebagio
Dept.of Elect. Eng., Institut Teknologi SepuluhNopember (ITS) Surabaya,Indonesia
Abstract -This paper proposes a new scheme Pulse
Width Modulation (PWM) to overcome low performances
of conventional PWM conhol strategy in Cascaded
Multilevel Inverter (ACMLD. This scheme advance
conventional Carrier-Based PWM (CBPWM) using
triangle canier in different amplitudes. By this scheme
ACMLI can conhol by PWM that according to dc voltage
amplitude used and finally the Total Harmonics
Distortions (THD) can reduce to the settle standard.
Simulation using Matlab Simulink used to veriff the
performance and result simulation shown than this
proposedschemecan reachthe goals.
the ACMLI, there is a problems, that is its have low
power quality performance, so many method to adjust this
controller find in many papers in the last decade.
To solve this problem, this paper propose a new
schem'e,which namely Advance Pulse Width Modulations
(APWM). This schemeon behalf of PWM, but its not use
triangle carrier waveform in equal amplitude as like to in
the conventional PWM. The frequency and amplitude of
triangle modulation must be accordingto amplitude of DC
voltage on eachH-Bridges inverter .
Key word- asymmetric cascaded multilevel inverter,
multi carrier pulse width modulation, power quality, total
harmonic distortion.
CMLI proposed to solve all the problems of the
multilevel inverters as well as conventional multi pulse
(or PWIO inverters t5-71. CMLI eliminates the
excessively large number of bulky transformers required
by conventionalmulti pulse inverters,the clamping diodes
required by multilevel diode clamped inverters, and the
flying capacitors required by multilevel flying capacitor
inverters.
CMLI consists a series connection of multiple H'
bridge inverters. Each H-bridge inverter has the same
configuration as a tlpical single-phasefull-bridge inverter
[3-41. CMLI introduces the idea of using separateDC
sources to produce an AC voltage waveform. Each Hbridge inverter is connected to its own DC source. By
cascadingthe output voltage of each H-bridge inverter, a
stepped voltage waveform is produced [5-7]. If the
number of H-bridges is N, the voltage output is obtained
by summing the output voltage of bridges as shown in
equation (l). Fig. I shows configuration of CMLI on
single-phase.
I.
INTRODUCTION
The multilevel inverter [MLI] is a promising inverter
topology for high voltage and high power applications [].
This inverter synthesizes several different levels of DC
voltages to produce a staircase (stepped) that approaches
the pure sine waveform [3-9]. Its have high power quality
waveforms, lower voltage ratings of devices, lower
harmonic distortion, lower switching frequency and
losses,higher efficiency, reduction of dv/dt stressesand
gives the possibility of working with low speed
semiconductors if its comparison with the two-levels
inverters. Numerous of MLI topologies and modulation
techniqueshave been inhoduced and studied extensively,
but most popular MLI topology is Diode Clamp, Flying
Capacitor and CascadedMultilevel Inverter (CMLI). In
this paper we use a CMLI that consist ot some H-Bridge
inverters and with un-equal DC. Its also namely
Asymmetric CascadedNultilevel Inverter (ACMLI). Its
most implemented because this inverter more modular
and simple construction and have other advantages than
Diode clamp and flying capacitor [7].
There are many modulation techniques to conhol this
inverter, such as Selected Harmonics Elimination or
Optimized Harmonic Stepped-Waveform(OHSW), Space
Vector PWM (SVPWM) and Carrier-Based PWM
(CBPWM). Among thes modulation CBPWM is the most
used for multilevel inverter, brcause it have simple
logical and easy to implemented. But if CBPWM used in
U.
10E60G5353IJECSIJENS @ Decembq 2010 UENS
ACMLI
v,.l
ro
glu0 ?snq nu\^e\zq\ gluOqouo\2silq\Vsp\s
o1Eu0\\reeuu0
Co11e0c
Dr WnplturrusqldPsl KPsu
g lecpuolo0Ngsu0lsqezp
gs\zpsprglutrewtt\o1Eu01ueer.1u0
pr'gleq Vpqnl U\logs
Psu
fs?p? gluYreeqN
e'Hsplp Ksseur!
gscegebeilulrier'zqhlnlYeh
wnefs$t clul€u
(etopst gsubne)' gsuolsqezp
glulrrer,zqh
glnud gee
gscegebegluYrer'aqN
1nq<e\
ylpsu gsbnansodln
gluyrer.zq\
11sr.s'Y1s1s\z1s
Msu HneesluMsu lepsr
o1gu0tueeuu0suq lecpuolo0NgsuOlsqezp
C\lrts0ou0gluyrer-zq\
pri yynpsr.uursq
vpqnr gspursu gpn;rsu
glunee$r 1ecpuo1oO\
Seltousz 111s1s\z1s
Dr.'lLtsl^ttu El:tujAssrup!
Ktnb\t\ D$suts$ ?snq\vsp\s
BGllownrptsr
lnye}r
Hscl lNcpurG[BseKounz
o1ylslsls' y1s1slz1s
nuqrrer"zr.$
Dt'gsurc?p l-ltltnsu!
Vnz$s\\s
Eq\tNCo^su glutree$ \u beup' N e?[eLU
Hsleap Knurst EsuJt4
lnqte\
Vusqo\ng1u1ner.zr1N
Dt' Ellt os{ctlr
111s1s\z1s
It'el^stlto
o1gtrs1s\z1s'
gluyrer'zq\
11r1s1s\z1s
peebsY fsxu! l4slsaluJplt
glulrrer.zr$r
1ecpuo1oo\Sepouse y1s1s\zts
?suenlvtlttlu B vpqnl KltLlur
ptews{Iousl lonutsl? olBu8lueerrut gi 2cleuce? I1EJ4?
InternationalJournalsofEngineering& Sciences IJENS
M. M. Noor
UniversityMalaysiaPahang,Mataysia
VijayaKumari
lndia
YksekMhendisiMurat
TOPAL,Turkey
Dr.JariahMohammad
Malaysia
Dr A.M.R.G.Athapaththu
CurtinUniversity,
Sarawak,Malaysia
ISSN:2077-1231
INDEX
On Location-Centric SemanticInformation Retrieval in Ubiquitous Computing
""""""1
Environments...........
RaghdaA. Fouad, Nagwa Badr, Hanaa Talha,MohamedHashem
Pitch
characterization of Granular Type Capittary to wire Bond Yleld for ultra-Fine
""""8
Large Quad Ftat Packageof Semiconductor-Packaging""""'
Jalar
Azman
Harun,
Fuaida
Abdullah,
Huda
Nor,
Mohamad
Nurrl H'idayah
Ibr;ht;;i;oi,
IncreasingBandwidth Dual Frequency Triangular Microstrip Antenna For WiMAX
"""""19
Application
Indra Surjati, Yuli KN, Yuliastuti
Environment............"24
MeetingLoad Demand at Least Cost in De-centralised'Electricity
Ahmad
Intesar
F'
Aslam,
Hafiz Tl Hassan,Kashif Imran, Muhammad
Developinga Reputation Model for Electronic Markets'
Nagwa E. Elgohary, AhmedA.Elfetouh, ShereifI'Barakat
""'30
Designof a Wireless Temperature Acquisition Systemfor Laser Cutting Process..." " """41
tr't. tiokntar, M. S. A. Manior, O. Sidek, M. Q. Omar, H' Edin, M'A' Miskam
Advanced Carrier Based PulseWidth Modulation in Asymmetric CascadedMultilevel
"""""""47
lnverter....
BambangSujanarko,MochamadAshari, Mauridhi Hery Purnomo, OntosenoPenangsang,
Soebagio
Intelligent Object and Pattern Recognition using Ensemblesin Back Propagation Neural
"""""52
Network....
Imran
Kashif
Khalid,
U.
Muhammad
Hafiz T. Hassan,
FaceAuthenticationSystemBasedon FDA and ANN"'
M. A. TehNoranis, N. Shahrin Azuan
""" """"60
Towards Designing a Biometric Measure for Enhancing ATM Security in Nigeria E"""""""""'68
BankingSystern......
Ibtdapol O. Akinyemi, ZaccheousO. Omogbadegun,Olufemi M Oyelami
Developmentof Electronic Government Procurement (e-GP) Systemfor Nigeria Public
"""""74
Sector.......
O
Marion
K.,
Adebiyi
Charles
Ayo,
A.,
Adebiyi, Ayodele
Broken
SpectralAnalysis of Misalignment in Machines Using SidebandComponentsof
"""85
Rbtor Bar, ShortedTurns and Eccentricity......."""""""':'
I. Ahmed,M. Ahmed, K. Imran, M. Shuia.Khan, T' Alcram,M' Jawad
t"te.natlonat Journalsof Engineering& SciencesIJENS
International Journal of Electrical & Computer SciencesIJECS-IJENS Vol:10 No;06
ISSN,ZOZZ-rZI
Ontology-BasedQuery in Heterogeneous& Distributed Data Sources.....
Najood Al-Ghamdi, Mostafa Saleh,Fathy Eassa
......94
M-ary FSK with OrthogonalPulseEnvelopesand its NoncoherentDetection..... . .. . ... . .. 116
SuhadShembil
FPGA Modules for ConversionsbetweenFixed and Floating-point in Quartus-Il
.........120
Environment............
Erkan DUMAN, Hayrettin CAN, Erhan AKIN
On Two DimensionalCellular Automata and its VLSI Applications......
Abdul RaoufKhan
International Journalsof Engineering& SciencesIJENS
......124
48
Intemational Journal of Elechical & Computer SciencesIJECS-IJENSVol: l0 No: 06
Fig. l. Single-phasecascadedmultilevel inverter.
Using fig. 1, output voltage could express as (l). If
ACMLI have N H-Bridges, there are many output
voltages that produce from (1) with each H-Bridges has
three varieties and has switching-statesthat appropriated
on the voltages"
V,(t) = V",r(t)+ l/"2G)+ .....+ V",*(t)
(l)
sinusoidalpulse width modulation (SPWM), which usesa
triangular carrier to generatethe PWM as shown in Fig. 2"
Fig.2. Basic principle of PWM
CBPWM uses several triangle carrier signals, one
carrier for each level and one reference, or modulatiorl
signal per phase. CBPWM .for three phasesis shown in
Fig.3. In this figure shows the reference and carrier
waveform anangements necessary to achieve CBPWM
for a sevenlevels inverter.
I
In the CMLI, the DC voltage may or may not be
equal to one another" If there are equal DC voltage, it
namely symmetric CMLI and if there are un-equal DC
voltage, it namely Asymmehic CMLI (ACMLD.
Binary and hinary DC voltages progressionsare the
most popular of unequal DC sources of ACMLI [4]. In
binary progression and if the number of H-Bridge
inverters are N, the amplitude of DC voltageshaving ratio
l'. 2: 4". 8. " : 2N and the maximum voltage output can
equal (2N-l) Vdc. While in the hinary progression the
amplitudeof DC voltageshaving ratio 1:3:9: 27. . : 3N
and the maximum voltage output voltage reach to ((3Nl)/2) Ydc. Other un-equal DC voltage is equalintervalDC
voltageprogression.
If N:2, the DC voltageareVl:1, Y2=l/2;
N=3, V1=1, V2=2/3,V3=l/3; N=4, V1=1, V2=3/4,y3=U2,
Y4=l/3; and N=5, Y1=1, Y2=4/5, V2=3/5, V3=2/5, V5=l/5.
ACMLI usesinequantizationprogression[2], alsocan usedin
the ACMLI where each DC voltage can be determinedby
equation(2). In this equationthe voltageofsine wavereference
is Vm, thefrequencyis t the sequence
V*.i =hsn(at,)
=Jzr"ne',tQP
il
4N"
= .,!i v ri 4 o i J -)
III.
Fig.3 CBPWM for sevenlevels
IV"
PROPOSESSCHEME AND DESIGN
The proposed scheme of advance CBPWM can show
at Fig. 4. Each carrier wave in the CBPWM has amplitude
of voltage peak to peak (vpp) that equal to each DC
voltage. In this figure, vpp of carrier wave C3 equal to
VDC3, vpp of C2 equal to VDC2, vpp of Cl equal to
VDCI, and so also vpp in the negativephase.
i = r.2 3 ...,N ( 21
CARRIERBASEDPWM
Amongothermodulation,CBPWM shategiesarethe
most popularmethodsusedin CMLI, becausethey are
easily implemented.Basic principle of CBPWM is
COMPARI$OR
vuu] -F\vronc
r,"*,
i./
Fig. 4 Proposedscheme
Implementation this scheme in the circuit is similar to
CBPWM conventional. The difference is only the
amplitudesof triangle carrier. Fig. 5 shows block diagram
of this circuit. This circuit then simulate with
MATALB/SIMULINK.
Fie. 6 shows this circuit
108606-5353IJECSIJENS O December 20I0 IJENS
-
49
IJECS-IJENS
Vol: 10No: 06
IntemationalJournalof Electrical& ComputerSciences
simulation.Among DC voltagesprogression,
simulations
done using sine quantizationDC voltage progression,
because
hasoptimumperformance
[3].
Amplitude of DC voltage in this simulation are
Vdc5-l ; Vdc4=0.95
; Vdc3:0.8I ; Vdc2:0.59;Vdcl=0.3I
9seeeq.2). While the amplitudeof triangleare3.6615for
.CBPWMin theconventional
schemeandVpp C5:l; Vpp
C4:0.95; Vpp C3:0.81; Vdc2=0.59; Vdcl:0.31.
Amplitudeof sinereferencein this simulationis 3.66V.
Fig, 7. H-Bridges circuit
Each H-Bridges in ACMLI has power elechonics as
shown in Fig. 7. IGBT used in this circuit. In Fig. 8 shown
detail of each CBPWM on each H-Bridees.
Fig, 5 ACMLI blockdiagram
Fig, 8 Detailof GBPWM
Fig, 6. Simulationcircuit
V.
REST]LTANDDISCUSSION
Resultsof simulationsare shownin Fig.9 to Fig.l2.
CBPWM.In
Fig.9is resultsimulationin the conventional
this systemcarriertrianglehave equalamplitude,while
theDC voltagehavesinequantizationasdecryptedabove.
Its show that the waveform has fundamentalamplitude
3.997 and THD in the frequencyup to 1500is 8.94o/o.
Thefrequencyspectrum
this systemis shownin Fig. 10.
108606-5353IJECS-IJENS @ De@mber 2010 UENS
T
I
International
Journalof Electrical& computersciencesIJECS-IJENS
vol: l0 No: 06
FFlwindru.I of l cpJesd*keldryal
50
;:il:li,?ljl[5:?1??Fi":ritil]?lrr:il,hissvstem
Hz_,is0.4e%o.w'ethe,!..lil#fl'n',:'f.Ti7;ib%l',?9
ln thtssyslemshowsin Fis.I2.
'""i"fi
j lr'{
fFTnsdow:
ll
| lal.yct
r ot!c'&f!d
lrgd
i:
I
0.{06 t.!1 *.ilt
Iii€(rt
041{
lffdrm€rrrlt$tb) =1.663,
t{F 0.t!$
!
E
E
I
Fig, 9 Output waveform and frequency
spectrumof
CBPWM conventional
I ria {DC}
5S Ha Fund
100 tis (h? )
L5il lla (h3 )
70$ H e (h 4 l
f,Jfl Hz (hF)
3S i Hr (h 6 )
35il Ha { h T }
40il HE th B l
450 lt r (h S )
501 Hz (h l 0 l
5. 5S Hz (h l l )
60i Hr (lr1? )
65f l HE (h t3 l
?0S HE (h t4 )
?5[ Hz { h t5 )
8flfl liz {}rI6}
B , 5i Hz (h l ? )
90S HE { h t* }
950 t t r { h 1 9 )
.10flil Hz (hAS)
$. CI.]_*
1 0 6 .0 0 t
0 .0 3 *
8 .9 2 $
0.0t s
s.03 *
0.a3 *
9 .1 ?
0 .0 3
0 .1 3
S
&
t
4.03 s
0.10 $
t.03 t
0.09 q
s"83 t
[.06 *
0.t3 s
fl.13 3
s.93 *
ff.03 t
0.CI3 t
Fig, 10 Frequencyspectrumof CBpWM
conventional
Fig. I I showsresultof CBPWM was proposed
in this
paper. This result indicates that the proposed'scheme
can
rmprovepower quality, althoughthissyitem
only replaces
the amplitudes of carrier iriangle' in
'CgFWNa
tir"
m
$
3o
,"*JLr"
Fig, I I Outputwaveformandfrequencyspectrum
of
AdvanceCBPWM
B H z (D c)
0"00 ff
50 He Fund
rOc"0[ $
100 ti e (hf,)
9,ilo *
150 H a { h3}
0.33 +
t0rl H a {h* }
0"t0 *
?58 H a th5)
B.t3 t
30G H z {h6}
p,00 s
350 H z {h?}
0 .1,5 t
400 H r {hS )
n.s0 t
{50 H s th9)
0.16 F
500 H z { htFJ
0.0u t
55S H e { htt)
U.CIB*
600 H z {ht-Z)
0.80 *
650 H a {ht" F)
0,0? *
?80 H z {h1* }
o.0F *
?50 H z thr5J
n,03 t
800 l l a tht6)
B.OE t
850 H a { ht?l
0.03 t
900 fl a { hIS )
0.90 t
550 H e { htg)
0. 1,6 t
Itt00 H z (hA 6)
0.0ff r
Fig, l2 Frequency
spectrumof AdvanceCBPWM
_lOto Fig, 13,it showthartheperformance
of".IroTjlq
theACMLI moredifferent,wheretf,. propir"Jr.n.rn.
hasbetterquality,especiallyto reducetffO.'ne
different
arsonappen
in theotherDC voltageprogression.
108606-5353IJECS-IJENS @ December2010
UENS
ru
International
Joumalof Electrical& computerSciences
IJECS-IJENS
vol: l0 No: 06
CONCLUSION
A new schemeof CBPWM for ACMLI was proposed
to improve the output voltage of CMLI. This schemeonly
replaces amplitude of carrier wave in the CBpWM
according with amplitude of DC voltage that used in each
H-Bridge. In the five H-Bridge of sine quantization
ACMLI, THD can improve from 8.94 to 0.49%, Beside
this power quality parameter, other pararneter also can
improve extremely, such as frequency spectrum and
amplitude of fundamental output voltage.
5l
Mochamad Ashari receivedtle Bachelordegreein elechical
engineeringfrom the Institut TeknologiSepuluhNopember(ITS)
Surabaya,
Indonesia,in 1989andMasterandPh.D.from Curtin
Universityof Technology,Perth,Australia.He has beenwith
ITS since 1990as a Lecturerin the Departrnentof Electrical
Engineering.He is a Professor and head of Electrical
Engineering ITS. His research interests include power
electronicsand inverterapplications,power systemmodeling,
simulation,andanalysisof hybridpowersystems.
REFERENCES
S. SutuG. Sinha M. D. Manirekar.T. A. Lioo.
t11 B.
j
"Multilevel
"MultilevelPower
"Multilevel
PowerConversion
Conversion
- An
An Overview'of
Overview-of
Topoloei and Modulation Strateeies". IEEETopologies
t2l
UPIIM ConterenceRecord,
OPTlMConference
Record pp. ll-24.
I l-24.-vol.
vol.2.
2. 1998.
1999.
Bambang
Bambang Suianarko,
Suianarko, Mothamad
Motlramad Ashari
Ashari and
an(
Mauridhi Heti
Mauridhi
Pumomo, "Universal
Aloorithn
Hery
Pumomo,
"llniversal Aleorithm
'AsvmmetriC
ConholConhol for 'Asymmetri6 Cascaded Mriiitivei
Miltilevel
t3l
t4l
Inverter", Internhtional Journal of Comouter
Applications- (0975 8887), Vol.8, No.lS,
November2010.
E. Babaei, S.H. Hosseini. G.B. Gharehpetian.M.
Tarafdar Haque4 M. Sabahi, "Reduction oi dc
voltage sources and switches in asvmmetrical
multilevel converters using a novel 'tooolow".
p!e_c3icPower Systems Rdsearch,71, Z\Ol,"pp.
1073-1085.
J.S. Lai nd F.Z. Peng" "Multilevel converters-A
new breed ofpower
co-nverters",IEEE Transactions
-Applications.
on Industry
vol.32, pp. 509-51,
May/June, 1996."
Mauridhi Hery Purnomo receivedthe B.S. desreefrom
Institut Teknologi Sepuluh Nopember (lTS) Surabava.
Indonesia and lvlastbr ad Ph.D frori Osaka Ciw
University, Osaka, Japan. He is a Professor in thl:
Departmentof Electriq4 Engineering,ITS. Since 2007,he
was vice director on ITS pbsteradrlite proeram. He has
been.engaged in research'andteaching in-the areas of
mterllgent system and pattem recognttton. power system
srmulauons,ano computer programmlng
Ontoseno Penanqsang is a Professor in the Deoartment
of Electrical EnEineeiine, Institut Teknolosi 'sepuluh
Nopember (lTS), Surabaia , Indonesia. He- has'oeen
engaged in research and ieaching in the areas of power
sysremano etecrtc power slmulattons.
Soebagyo is a Professor in the Department of Electrical
EngineEring,Institut Teknoloei SepirluhNopember flTS).
Surabaya ,-Indonesia. He hai betjn eneaee'din res'earc'li
and tedchine in the areas of elechic drjvE and electrical
vehicles.
tsl
Kuhn, H.
Ruger, N.E.
Mertens. A.. "Control
Strategy for Multilevel Inverter with-Non-ideal DC
S_o$^c!
s", _Power F/ ectronics Special i sts Conference
(PESC),Hanover, 2007.
M. Tolbert, John N. Chiasson. Zhone Du. and
t6l L.
Keith J. McKenzie, "Elimination of Harni'onici in a
Multilevel ConverterWith Nonequal DC Sources".
IEEE Transactions On Industrv Aoolications. Vol.
'
pbl
41, No. l, January/February
2005.
-H. 75-82.
M.
G.
Hosseini
Aehdaft.
S.
Fathi.
G. B.
171
Gharehpetian,"A Coinplete Solution of Hirmonics
Elimination Problem in a Multi-Level Inverter with
Unequal DC Sources", Joumal of Electrical
Systems,3-4, 2007. pp.259-27l.
t81 S. J. Park, f'. S. Kans, S. E. Cho. C.J. Moond. H. K.
Nam, "A novel swiichins shatesy for imdrovine
modularity and manufadturabilfi of ca'scaded
transformbr-based multilevel inverters". Electric
PowerSystemsResearch.74.2005. oo.409416
lel S. Krishha. "Harmonic Elimination'bv Selectionof
Switchine Ansles and DC Voltaees in Cascaded
Multileve-l Interters". Fifteenth \ational Power
Bombay,
$stem.s Conference (NPSC), IIT
December2008.
AUTHOR PROFILE
Bambang Sujanarko received the B.Sc. from Universitas
Gadjah Mada, Yogyakarta Indonesia and Master from
Universitas Jember, Indonesia. He is senior lectue of
Departement Electrical Universitas Jember and currently
toward his Ph.D in Institut Teknologi SepeluhNopember
(ITS) Surabay4 Indonesia. His researchinterestsincluded
power electronics and renewable energy systems,hybrid
power systems,artificial intelligent, and instrumentation.
10E60G5353IJECS-IJENS @ December 2010 UENS
?