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INTERLEAVED BOOST CONVERTER AND PHOTO VOLTAIC SYSTEM

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- 1. Presented by: Bibhu Prasad Ganthia 1407105060 (PED)
- 2. Motivation Overview Schematic block diagram PV System DC-DC Converter (Boost) MPPT(P&O) Results Conclusion Future Work
- 3. NON-CONVENTIONAL SOURCE OF ENERGY Limited availability of conventional energy sources . Renewable source of energy. Effective in all weather condition. Eco friendly. PV SYSTEM Increase Generation capacity. No emission of pollutants. .
- 4. Simulation of PV module. Development of MPPT algorithm(P & O Method) . Design and simulation of DC-DC converter(Boost converter) Design of MPP tracker.
- 5. PV ARRAY INTERLEAVED BOOST CONVERTER MPPT DC LOAD
- 6. Equivalent Circuit SINGLE DIODE MODEL OF PV CELL Where, Iph =Photocurrent ID =Diode current Ipv =PV cell current Vpv=PV cell voltage Rs= series resistance RP= resistance due to leakage current (parallel resistance)
- 7. 𝐼 𝑃𝑉= Iph-Is[exp(q(Vpv+IpvRs)/KTcA)-1]-(Vpv+IpvRs)/Rp Iph=[Isc+Ki(Tc-TRef)]ß/1000 Is(t)=Is(Tc-TRef)3exp[qEg(1/Tref-1/Tc)/KA] Where, Is=Reverse saturation current q= charge of electrone K=Boltzmann constant A= Ideality factor Tc= Tref= ß= irradiance Eg=band gap energy
- 8. (T=25oc , G=1000 w/m2) I~V Curve P~V Curve
- 9. Steps up the input voltage. Helps in removing nonlinearity. Helps in increasing system efficiency. DC-DC Boost Converter L Diode Switch
- 10. Charging Mode: The switch is closed and the inductor is charged by the source through the switch. The charging current is exponential in nature but for simplicity is assumed to be linearly varying. The diode restricts the flow of current from the source to the load and the demand of the load is met by the discharging of the capacitor. Discharging Mode: The switch is open and the diode is forward biased . The inductor now discharges and together with the source charges the capacitor and meets the load demands.
- 11. The efficiency of solar energy is very low. Thus we need some techniques to extract the maximum power from these arrays, to ensure that power converter circuits operate at the maximum power point of the solar array. The basic principle of MPPT is to extract the maximum available power from PV module by making them operate at most efficient voltage(MPP). The main objective of all these MPPT algorithms is to achieve fast and accurate tracking performance and minimize oscillations due to varying weather conditions.
- 12. A lot of MPPT algorithms have been developed by researchers all over the world. They are: perturbation and observation method incremental conductance method Hill climbing method. P&O method is the most frequently used algorithm to track the maximum power because of its simple structure and fewer required parameters.
- 13. Start Measure V(n) I(n) Calculate Power P(n) P(n)-P(n-1)=0 P(n)-P(n-1)>0 V(n)-V(n-1)<0 V(n)-V(n-1)>0 YESNO YES YES NO NO NO YES Return
- 14. After MPPT Control:
- 15. Interleaved boost converter has been studied and the waveforms have been verified. One close loop inverter will be designed for the grid synchronization.
- 16. WEI WEN YIM-SHU LEE, Senior Member, IEEE,MARTIN HOI LAM CHOW, Member, IEEE ,DAVID KI-WAI CHENG,” Interleaved Boost Converter with Zero Diode Reverse- Recovery Loss”. Wong, P. L., and Lee, F. C. (2000),”Interleaving to reduce reverse-recovery loss in power factor correction circuits.” Jovanovi´c, M. M. (1997), “A technique for reducing rectifier reverse-recovery-related losses in high- voltage, high-power boost converters.” In Proceedings of IEEE APEC’97 Annual Meeting, Vol. 2, Feb. 1997. Tseng, C. J., and Chen, C. L. (1998), “Passive lossless snubber for dc/dc converters. In Proceedings of IEEE APEC’98 Annual Meeting, Vol. 2,Feb. 1998

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