Maximum Power Point Tracker for PV Panels Using SEPIC Converter

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Maximum Power Point Tracker for PV Panels Using
SEPIC Converter

• R B DARLA

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• Why Photovoltaic ?

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• What is MPPT ?
• Maximum power point tracking is an electronic
  tracking method to extract maximum available
  power from Solar cells

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• What is the Problem of Photovoltaic ?
• WHY 74 Watts NOT equal 74 Watts ?
• Where did my Watts go ?
• Whenever 74 watt Panel connected to 14 volts
  battery we may loss 13 watts.
• That 13 watts is not going to any where , it
  just is not being produced because there is a
  poor match between the panel and the battery.

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• What is a power point tracking gizmo ?
• Panel Tracking
• Maximum Power Point Tracking

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• How does M P P T works ?

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Components of MPPT

• Switch Mode Power Supply
• Control Algorithms
• Micro Controller

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Switch Mode Power Supply

• In the literature the following e switch mode
  power supply topologies are available
• 1. BUCK
• The output is less than or equal to input
  voltage
• 2. BOOST
• The output is greater than or equal to input
  voltage
• 3. BUCK-BOOST
• The output is greater or lower than the input
  voltage
• 4. CUK
• The output is greater or lower than the input
  voltage
• 5. SEPIC
• The output is greater or lower than the input
  voltage
• By using this we can overcome above disadvantage

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Control Algorithms

• Perturb and Observation Method
• Dynamic Approach Method
• Incremental Conductance Algorithm

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Main Parts in Block Diagram

• PV Panel
• SEPIC Converter
• Control Section
• Voltage and Current Sensing Circuits
• Battery

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SEPIC Converter
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Verification of SEPIC Converter
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Control Section
Incremental Conductance algorithm
PIC Micro controller
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Voltage and Current Sensing Circuits
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Schematic of Proposed MPPT
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Control Algorithm flow chart
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Results

• Testing of SEPIC Converter
• Testing MPPT

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Testing of SEPIC Converter
SEPIC Converter input and output values at 50
duty cycle and load at 50 Ohm
SL No Source Voltage Input current Load voltage Load current
1 3 0.06 2.9 0.06
2 4 0.08 4 0.08
3 5 0.12 5.2 0.10
4 6 0.13 6 0.13
5 7 0.2 6.8 0.23
6 10 0.26 9.8 0.25
7 12 0.26 13.5 0.26
8 14 0.3 14 0.29
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Conclusions
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REFERENCES

• 1 R. B. Darla, S. R. Kurode Continuous
  Conduction Mode SEPIC Converter For Maximum
  Power point TrackingIEEE ACE 2003.
• 2. H.S Hung Chung, K.K.Tse a novel maximum
  power point tracking technique for a solar panels
  using a SEPIC or CUK converter. IEEE Trans
  power Electronic vol.18 no.3 may2003.
• 3. D.C.Martins,A.H de Oliveira Three Phase
  Rectifier Using a SEPIC DC-DC Converter in
  continuous conduction mode for power factor
  correction IEEE 1998.
• 4. K.Ktse. S.h Chung A Novel Maximum Power
  Point Tracker For PV panels using Switching
  frequency Modulation IEEE Trans on power
  electronics vol 17 no 6 Nov 2002
• 5. C hua ,J Lin and C shen Implementation of
  a DSP- Controlled Photovoltaic System with Peak
  Power Tracking IEEE Trans on ind electronics
  vol,45 no 1,jan1998.
• 6. E Koutroulis,K Kalaitzakkis and N C
  Voulgaris Development of a Microcontroller
  based , Photovoltiac Maximum Power Point tracking
  Control System IEEE Trans On PES vol 16 No1 jan
  2001.
• 7. Y C Kuo, T J Liang and J F Chen A High
  Efficiency Single-phase Three Wire Photovoltiac
  Energy Conversion System IEEE Trans On Ind
  Electronics vol 50 n0 1 feb 2003.
• 8. D C Martins .anderson H Three Phase
  Rectifier Using a Sepic DC Dc Converter In
  Continuous Conduction Mode for Power Factor
  Correction IEEE 1998
• 9 P Midya et al dynamic maximum Power Point
  tracker for Photovoltiac Applications Annual
  IEEE PESC, IEEE Computer Soc 1996 vol2 pp
  1710-16.
• 10 C. Hua and C. Shen, Study of Maximum Power
  Tracking Techniques and Control of DC/DC
  Converters for Photovoltaic Power System, 29th
  Annual IEEE PESC, IEEE Computer Soc. Press, New
  York, USA, 1998, pp. 86-93.
• 11 R.B.Darla M.E. Thesis Report GCOEP,Pune
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THANK YOU
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