-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
1/43
SHRIPAD KAMALAKAR KSHEERSAGAR
ASHUTOSH W WERULKAR
DR.P.S.KULKARNI
Dept. of Electrical Engineering,VNIT,Nagpur
PAPER NAME:-STUDY OF DESIGN OF SINGLE PHASE
INVERTER FOR SOLAR HOME LIGHTING
SYSTEM
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
2/43
OUTLINE Introduction Aims and Objectives
Standalone Solar Photovoltaic system
CIRCUIT DESIGN
Circuit Description
Applications
Conclusions and future scope
References
March 132
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
3/43
AIMS AND OBJECTIVES
The aims and objectives of the present work areas under-
To develop a single phase inverter for solar home
lighting system purchased for the Department of
Electrical Engineering, VNIT, Nagpur.
To verify the working of the inverter by connecting
CFLs as load.
To observe the output voltage waveform undervarious load conditions.
To find the efficiency of the inverter and plot the
output vs efficiency curve.
To find the Total Harmonic Distortion (THD) of theMarch 133
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
4/43
Motivation
Emerging Renewable EnergyTechnologyKeeping in view power crises inthe India, everyone is keen to
adopt it.Nagpur is going to be solar cityin future. (MNRE)Immediate return and cost
saving technology over life.(LifeCycle Cost Saving)Easy to adopt with less effortsNo INVERTER is purchased for
Dept.Solar PV system. March 134
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
5/43
Indias Energy Balance
March 135
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
6/43
Charge
controller INVERTER
STORAGE
BATTERY
12V
From
The PV Panel
To the load
(CFL)
CFL
The stand-alone Street Light
system
sun
March 136
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
7/43
SPV based Home lighting System
(Electrical Engg. Dept.)
March 137
DC Fan
Volts 12 V DC,14 W
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
8/43
Rating of Solar Home Light System:-
1. Solar Photovoltaic Panel
12V,37Wp2. Battery:-
Low maintenance battery 12V,45 Ah
3. Solar PV Charge Controller:--Max. charging current - 5 A
-Max. Load current - 5 A-Nominal voltage - 12 V-Fuse - 5A
4. DC Fan:-Volts12 V DC,14 W5. Compact Florescent Lamps
Volts12 V DC,9 W, 2 No.s
March 138
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
9/43
GENERAL DESCRIPTION OF INVERTER
DESIGN
Block diagram consists of solar panel, solar charge
controller, battery ,oscillator-cum-divider, driver,
inverter transformer and power amplifier .
The battery is charged through the PV modulethrough solar charge controller. Solar charge
controller prevents over charging and deep
discharging of battery.
March 139
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
10/43
SOLAR
PANEL
SOLAR
CHARGE
CONTROL
LER
OSCILLATOR
CUM DEVIDERBATTERY
POWER
SUPPLY
DRIVER
CIRCUIT
POWER
AMPLIFIER
INVERTER
TRANSFORMER
LOAD
March 13 10
March 1310
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
11/43
March 1311
DESIGN OF INVERTER
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
12/43
EXPLANATION The battery is charged through solar module and is
connected to the circuit. The terminals of the batteryshould be connected properly.If the reverse situationoccurs,LED1 glows to indicate the wrong polarity.
(Refer Figure ).
If the switch S is closed, the LED3 glows to indicate powerON and 12 V d.c. reaches regulator IC 7805.The output ofIC 7805 is fed to the oscillator-cum-divider.
For indication of low battery level, a dual operational
amplifier IC LM358 has been used. Fixed reference voltageof 5.1V is applied to the positive input, while sensingvoltage is applied to its negative input.
March 1312
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
13/43
CONTD.
f=100 Hz is produced at pin 3 i.e. at pin 5 of IC 7473which produces 50 Hz square wave output at pins 8
and 9 of IC 7473.
IC 7473 acts as a bistable multivibrator which only
change the states when a trigger pulse is applied.
If flips to one state when triggered and flops to other
state when it is triggered . IC 7473 acts as a J-K flip-
flop.
March 1313
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
14/43
A.DRIVER CIRCUITOne of the outputs of IC 7473 is coupled to the base
of T1 through diode D1 via series limiting resistance.
Another output at pin 9 is coupled to the base of T2
through diode D2 via other series limiting resistance.
The transistors T1 and T2 are acting as a MOSFET
drivers. When T1 conducts T2 is in cut off and vice
versa.
March 1314
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
15/43
B. POWER OUTPUT STAGE The collector of transistor T1 is connected to theMOSFETs(F1 THROUGH F3)which are connected in parallel
on a heat sink. The collector of transistor T2 is connected to the
MOSFETs(F4 THROUGH F6)which are connected in parallelon a heat sink.
When T1 conducts corresponding MOSFETs (F1 throughF3)remains cut off while voltage of collector of T2 is at5V.Hence current flows through half of the invertertransformer primary.
When T2 conducts corresponding MOSFETs (F4 throughF6)remains cut off while voltage of collector of T1 is at5V.Hence current flows through half of the invertertransformer primary.
March 1315
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
16/43
C. POWER AMPLIFER
The power amplifier consists of two set of
MOSFETs connected in parallel for high current
operation of inverter.
March 1316
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
17/43
RESULTSOutput at pin 3 of LM555= 5V peak to peak,f=100Hz.
Output at pin 8 of IC 7473=5V,f=50Hz
Output at pin 9 of IC 7473=5V,f=50Hz
Output at the collector of T1=5V,f=50 Hz Output at the collector of T2=5V,f=50 Hz
Output across the secondary side of transformer
Vrms=240 V,f=50 Hz
March 1317
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
18/43
Voltage at pin no.3 of LM555
March 1318
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
19/43
Voltage Waveform at Pin 8 of IC7473
March 1319
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
20/43
Voltage Waveform at Pin 9 of IC7473
March 1320
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
21/43
March 1321
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
22/43
March 1322
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
23/43
March 1323
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
24/43
March 1324
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
25/43
March 1325
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
26/43
March 1326
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
27/43
March 1327
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
28/43
March 1328
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
29/43
Modeling and Simulation of Sine Wave
Inverter using Pspice Software:-
March 1329
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
30/43
For Load of 34W(5W+11W+18W CFLs)
Figure -Output voltage of Sine wave inverter with a load of 34W
March 1330
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
31/43
Figure :-Time response of RMS value of the output
voltage of the inverter
March 1331
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
32/43
Figure :- Instantaneous Output current
March 1332
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
33/43
Figure :-Time response of RMS Output current
March 1333
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
34/43
Figure :- Output power of the
inverter
March 1334
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
35/43
PLOT OF P Vs EFFICIENCY
March 1335
s rom
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
36/43
s romReadings)
March 1336
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
37/43
CONCLUSIONS
The efficiency of the inverter is calculated byconsidering different loads.The efficiency of the
inverter is calculated by
= Pac / Pdc
The efficiency of the circuit varies between 75% to
88 %.
The loads used are CFL and Bulb.
The respective table shows the variation of terminalvoltage and efficiency under different loads.
The THD (Total Harmonic Distortion) is calculated by
using the formula
March 1337
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
38/43
CONTD.
The THD (Total Harmonic Distortion) is calculated byusing the formula
The average THD IS 45%.
b) The filter is recommended at the output of
transformer .
March 1338
1
2
2
V
V
n
n
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
39/43
FUTURE SCOPE
The results obtained in the projectshould be verified by proper designing of
the transformer.
The inverter should be designed withDC-DC Converter as a charge regulator.
March 1339
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
40/43
REFERENCES
S.P.Sukhatme and J.K.Nayak Solar Energy-Principles of Thermal Collection andStorage.TMH, 3rd Edition,2008
Gilbert M.Masters, Stanford University Renewable and Efficient Electric power System.
John Wiley and Sons Ltd. ,3rd Edition.,2004
Chetan Singh Solanki Solar Photovoltaics Fundamentals, Technologies and
Applications,PHI Learning Private Limited,New Delhi,2009.
M.H.Rashid Power Electronics Handbook,Academic Press,pp 539-573.
Tomas Markwart,Ed. Solar Electricity John Wiley and Sons Ltd. 2nd Edition,2004
Roger Messenger and Jerry Ventre Photovoltaic Systems Engineering CRC Press.,1999
Luis Castaner and Santiago Silvestre,Modelling of Photovoltaic Systems using
Pspice.John Willey and Sons, Ltd.,2002
Mohan,Undeland and Robbins Power Electronics.John wiley and Sons Enhanced 3rd
Edition.
March 1340
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
41/43
REFERENCESPublication on Standalone Photovoltaic Systems:-
R. M. Moharil and P. S. Kulkarni, A case study of Solar Photovoltaic Power
System at Sagardeep Island, India, International Journal Renewable and
Sustainable Energy Reviews (Elseveir Publication), Vol. 13, 2009, pp. 673-
681.
Soib Taib,Yusmin Sutanto and Abd Rahim Abd Razak,Development ofsimple PWM inverter using photovoltaic cells,2002 student conference on
Research and Development Proceedings,Shah alam,Malaysia.,pp.297-
300.
A Ali Qazalbash,Awais Amin,Abdual Manan & Mahveen Kalid,Design and
implementation of microcontroller based PWM technique for sine wave
inverter,IEEE Conference POWERENG 2009,pp. 163-167. S R Narayana Prakash,B S R Iyengar ,A new sinewavv inverter with high
frequency link and synchronous rectification using powerMOSFETs,Power
electronics specialists conference,1990,PESC 90 Record,21 st annual
IEEE,pp.923-928.
www.efymag.com
March 1341
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
42/43
Any Questions aremost welcome
March 1342
-
7/29/2019 8 a 4Presention IIES2011 Single Phase Inverter
43/43