pv based thirteen level multilevel inverter for ... · of s-type pv based 13-level multilevel...

PV based Thirteen Level MultilevelInverter for Photovoltaic Systems

Dhineshkumar Krishnan1 , C.Subramani 2,G.Prakash 3

1Department of Electrical and Electronics Engineering,

St.Peters University, Chennai, India.2Department of Electrical and Electronics Engineering, SRM

Institute of Science and Technology, Kancheepuram, India.3Department of Electrical and Electronics Engineering,

Sri Sairam Institute of technology, Chennai,[email protected],[email protected],

[email protected]

January 25, 2018

Abstract

This paper approaches the appearing and modernizationof S-Type PV based 13-level multilevel inverter with lessquantity of switch. The current S-Type Multi level invertercontains more number of switches and voltage sources. Mul-tilevel level inverter is a be understandable among the mostgainful power converters for high power application andpresent day applications with reduced switches. The funda-mental good arrangement of the 13-level multilevel inverteris to get ventured voltage from a couple of levels of DCvoltages.. The controller gives actual way day and age toswitches through driver circuit using PWM methodology.The execution assessment of proposed multilevel inverter ischecked using MATLAB/Simulink. This is the outstandingamong other technique appeared differently in relation toall other existing system.

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International Journal of Pure and Applied MathematicsVolume 118 No. 17 2018, 549-560ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version)url: http://www.ijpam.euSpecial Issue ijpam.eu

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Key Words: THD,MLI, Harmonics, Solar panel,

1 Introduction

When all is said in done The inverter which is utilized to converterDC to AC supply and they have a downside of sounds to lessen thatmultilevel inverter came in the 1978 , by broadening the voltage allaround asked for the music can be disposed of ,There are threesorts of multilevel inverter are open and they are Diode clippedmultilevel inverter, Capacitor cut multilevel inverter and fell mul-tilevel inverter. Multilevel inverter expected basic part in controlstructures, Electric Traction, PV framework. Examined in [1], Inthis E-sort multilevel inverter pass on 13 Level yield for unequal Dcsources. The negative level in like way made without H-relate. Sothis framework requires less number of essentialness semiconductorcontraptions and warm anxiety diminishes in [2]. The 13 level yieldcan be gotten by 12 switches, this framework utilizes lifeless stagemove beat width regulation mentioned in [3]. The Eleven Levelyield voltage can be gotten by 10 switches and three DC sourcesand equation is 2n-1, The present structure utilizes 14 switches.It is shown by PSCAD programming and basic exchanging can beutilized as a bit represented in [4]. The five level yield can be gottenby 6 Switches which utilizes a heading structure and controlled byPI Controller and the Maximum power can be master by 750 Wsun based board by joining Boost and H-Bridge inverter in [5]. Thenine level inverter utilizes 12 switches utilized for 13 level inverter,utilizes 18 switches utilized for 19 level the yield as Half cycle. theTHD of the inverter around 19 % acknowledged in [6].

It utilizes three specific methodologies for relationship, in likemanner structure 28 changes to deliver 15 level yield. in [7]. Thespecific consonant disposal utilized as a bit of this multilevel in-verter which utilizes diverse exchanging plan. In which 43 socialevents of exchanging plot for the change list 0.12 for get 13 level. isdiscussed in .[8] Switched capacitor help multilevel inverter utilizes11 switches and 2 capacitor and diodes , the 2 capacitor utilizedfor exchanging for produce 13 level yield for fragmentary charging, this can be acknowledged in Electric vehicles .This topology givesblend of fell multilevel inverter and capacitor support exchanged

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International Journal of Pure and Applied Mathematics Special Issue

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capacitor converter and the get of the inverter is unprecedented istalked about in [9], The DC Bus bar related among PV and CHBinverter, This inverter can be reenacted in MATLAB and researchcenter show executed and give the brisk reaction without changingcontrol startergies.For more than 10 MW application utilized as apart of [10].

2 Photo Voltaic system

This multilevel inverter uses DC supply from solar panel. for ex-ample 10 watts panel has voltage of 17.6 at current of 0.56 A Re-spectively. Basic unit of a solar PV component is a solar cell. As-semblies of solar cells are used to make solar module. Numerous ofsolar modules make solar panel and gathering of sun based board.Photovoltaic module equivalent circuit is shown in Fig.1.

Fig 1.Equivalent circuit of solar panel

This sun oriented cell is not specifically associated with the in-verter and the diode associated in parallel. This is said currentsource parallel with the diode and shunt resistance. The yield cur-rent of the sun oriented cell is communicated as

Id Diode current, Is-dispersion current, T-incomparable temperature-Boltzmann consistent (1.38051023J/K), Charge q =1.6 1019 C Con-sidering the fabricate misfortunes, the identical circuit of the PVcell comprises of two resistances Rs and Rp associated in arrange-ment and parallel individually, where Rs speaks to the misfortunesbecause of the contacts and associations and R sh speaks to thespillage streams in the diode as specified and represented in [11].

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2.1 Pulse Width Modulation

Figure 2.Pulse width modulation Technique of the proposedinverter

The Pulse creator is portrayed as the switch ON period to theentire day and age is called as obligation cycle as described in thefigure 2. Here central pulse plan frameworks used to give the pas-sage pulse to the Switches. The ON time is unswervingly in respectto the aggregate conveyed voltage PWM= = ———– (2) The beatsare encircled by the switch activity for create ventured waveform.Here 8 switches are initiate to produce 13 level yield waveform.The beat generator utilizing OR entryway utilized for creating pos-itive voltage waveform and alongside invert gate used to delivernegative voltage ventured waveform .It is essential thing techniqueto give the entryway pulse to the control circuits.

2.2 Conventional systems

The conventional 13 level inverter as shown in the figure .3 showsThe conventional topology comprises of one dc source connectedacross seven capacitors and six switches along with one H bridgewhich has 4 switches .Totally this circuit uses 10 switches to getThirteen level output voltage waveform and which uses time frameswitching scheme for generate output voltage With reference to thesine wave .The each step of the output voltage can be obtained byadding and reducing the capacitor in the thirteen level inverter isdiscussed in the conventional system. This can be checked by tanglelab reenactment and tentatively confirmed. This framework utilizesSinusoidal heartbeat width balance for setting off the switches. Bycontrasting reference and vocation flag the sinusoidal Pulse balancecreated and we have considered inverter topology just is discussedabout in [21]. The one leg of the H-extension can be expelled fromthis framework and the proposed framework acquainted with betalked about in the following chapter.

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Figure .3.Conventional Thirteen level Multi level inverter

3 Proposed System

The s-type PV based 13 level symmetric Multilevel inverter asshown in the figure 4. The proposed topology has 8 switch where asconventional topologies has 10 switches, and hence Thermal stressand operating time of this circuit better than the conventional sys-tems. This system uses basic pulse width modulation as a switchingthe switches .The Total harmonic of the proposed inverter is betterthan the conventional systems. PIC microcontroller PIC16F877Ais used to generate pulse for Switches.

Number of level obtained ——(3)The equation (3), represents the Number of level of inverter

by number of switches The output voltage of the inverter ——(4)multilevel inverter .If increment the quantity of switches is 9, atthat point the 15 level voltage got in light of the equation .TheEquation (4)

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Figure .4.Proposed Multilevel inverter

speaks to the aggregate yield voltage of the inverter for vari-ous level, this can be gotten by the result of info voltage and thecapacity of switches. In proto sort display,

4 Results and discussion

4.1 simulation of PWM 13 level inverter

Figure .5

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The figure.5. Demonstrates the beat design for the 8 switchesof the inverter circuit, and it is specify plainly for each heartbeat.What’s more, beat 3 associated with from three heartbeat generatorand additionally entryway and extension , likewise beat 4 ,5,6&7associated 4 beat generator as well as doors separately , The PWMbalance is fundamental and basic strategy for pulse generation .

Figure .6.Simulation of 13 level inverter Figure.5 Proposed S-TypePV based Thirteen Level Multilevel Inverter

Figure .7.Dc input voltage of MLI

The DC input voltage wave form obtained from Solar panel is shownin the figure 7.The input voltage of the solar panel is 200V and it

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clearly mentioned with respect to time period. The constant voltageobtained from solar panel with respect to time.

Figure .8.Output voltage waveform of Multilevel inverter

The simulation of PV based S-type multilevel inverter produced 13level stepped waveforms ( Vdc,Vdc,/2,Vdc/3,Vdc/4, Vdc/5, Vdc/6,0,-Vdc,- Vdc/2,-Vdc/3,-Vdc/4, -Vdc/5, -Vdc/6) are obtained in theproposed inverter as shown in the figure 8.This results indicates areduced Total Harmonic Distortion.

THD of the Existing system is 10.80Figure .9.THD Analysis of Proposed inverter

The Figure.8. shows the proposed thirteen level multi level inverterand Total Harmonic Distortion of the inverter 10.2 % and is Lessdistortion with respect to conventional Inverter.

4.2 Experimental Results

The Experimental diagram of multilevel inverter as shown in abovefigure 10.. The solar panel is used give DC supply to the inverter.The 13 level output obtained from Digital CRO.

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Figure .10.Prototype model of PV based 13 level Multilevelinverter

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Figure .11. Experimental prototype Model output wave form ofS-type PV based multilevel inverter

The Experimental The 13 level output obtained from DigitalCRO as shown in the figure 11..and which provide high accurateresults while compare to Analog CRO so it is preferred.

5 CONCLUSION

In this paper, 13-level multilevel inverter with less competence ofswitches is proposed using PWM Technique. The current Multilevelinverter has only 8 switches to produce 13 level output wave formwith Single DC source, waveform and furthermore utilized as apart of sustainable power sources, The s-type Multilevel invertersimulated using Mat lab and demonstrated as a Porto-type model.Whereas conventional inverter uses 10 switches to produce 13 leveloutput voltage.

References

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[2] A.Gholamian, A.Sheikholeslami An Envelope Type (E-Type)Module: Asymmetric Multilevel Inverters With Reduced Com-ponents mad Samadaei, , J. Adab -IEEE Transactions On In-dustrial Electronics.

[3] Raul Rabinovicc, Dimtry Baimel,Jacek Tomasik, Thirteenlevel cascaded H-bridge inverter operated by Generic Phaseshift Pulse width Modulation, IET Power Electron., vol.6 .,pp. 15161529,, June 2013.

[4] J Ebrahimi, E Babaei, Goverg B Gharehpetian. A New Multi-level Converter Topology With Reduced number of Power Elec-tronic Components. IEEE Trans. on Ind. Elec., 2012; 59(2):655-667.

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[5] Jeyaraj Selvaraj and Nasrudin, Multilevel inverter for Gridconnected PV System Employing Digital PI controller. IEEETransactions on Industrial Electronics., Vol.56, no.1.pp Dec2002.

[6] Junfeng Liu,K.W.E Cheng, A cascaded multilevel inverterbased on switched capacitor for High frequency AC Power Dis-tribution system IEEE Trans. on Power Electron., vol. 29, no.8. , Aug. 2014.

[7] Albert Alexander ,Manigandan Thathan Modeling and Analy-sis of modular multilevel converter for solar photovoltaic Appli-cations to improve power QulalityIET Renewable Power Gen-eration.,vol.9,pp. 78-88 ., May 2014.

[8] Kehu Yang ,Qi Zhang Ruyi Yuan,Qiang Guan ,Wenssheng YuUnified Selective harmonic elimination for Multilevel convert-ers IEEE Trans. on Power Electron vol. 2016.

[9] Macro S.W,Chan and K.T.Chau, A new switched capacitorBoost Multilevel inverter Using partial charging IEEE Trans-actions on circuit and Systems ., Vol 54,NO.12 December 2012.

[10] Carlos D.Fuentes, Christian A. Rojas, Experimental Valida-tion of a Single DC Bus Cascaded H-Bridge Multilevel Inverterfor Multistring Photovoltaic Systems IEEE Trans. on PowerElectron .Vol 64,Issue 2, Pg 930-934, Feb 2017.

[11] K. Mahendran. ”Advanced cascaded multilevel inverter for PVcell renewable energy system employing incremental conduc-tance MPPT algorithm”, 2011 international conference on re-cent advancements in electrical, electronics and control engi-neering., January2011,pp367.

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pv based thirteen level multilevel inverter for ... · of s-type pv based 13-level multilevel...

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