Solar Power Based Buck boost Regulator
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The document presents a project on a solar power-based buck-boost regulator, highlighting its purpose to stabilize fluctuating solar power output. It discusses the workings of dc-dc regulators, focusing on the buck-boost converter's ability to adjust output voltage levels. Additionally, the document addresses applications, advantages, and future developments of the technology to enhance renewable energy use.
Solar Power Based Buck boost Regulator
- 1. MADAN MOHAN MALAVIYA UNIVERSITY OF TECHNOLOGY GORAKHPUR (U.P.),INDIA Project on Solar Power Based Buck-Boost Regulator Submitted by-: AMAN KESHARI (2016031009) ANSHUL YADAV (2016031010) ANTESH JAIN (2016031011) MADHUR MISHRA (2016031035) Under guidance of Mr. K.P. Singh (Associate Professor)
- 2. Content • Introduction • Objective • Overview • DC-DC Regulators • Types Of DC-DC Regulators • Buck Boost Regulator • Operation of Power Circuit • Duty Ratio • Voltage across inductor • Components • Simulation circuit of the BUCK BOOST Converter • Simulation Result of Buck Boost Converter • Applications • Advantages of Buck Boost Converter • Future Scope • References
- 3. INTRODUCTION • Currently there are plenty of technological applications that utilize natural, environmental-friendly sources of energy. However, a disadvantage often found in natural energy sources is that the intensity produced is uncertain. • This occurence is also found in solar panels, wherein the light intensity that enters is not always equal. Light intensity may be affected by various factors such as ones on gloomy or sunny weathers. • With the use of buck-boost converters, the amount of output voltage may be set to higher or lower than the input voltage, enabling us to maintain the desired output voltage.
- 4. OBJECTIVE • Basic objective of making this project is to regulate the fluctuating, ripple carrying power supply of solar power into regulated interrupted power supply by using Buck Boost Regulators. • This regulators can increase as well as decrease the output voltage, hence this voltage regulator is best suitable to give constant interrupted power supply. • Power conditioners are used to enhance the solar power generation in single stage or two stage configurations exclusively for residential areas.
- 5. OVERVIEW
- 6. DC-DC REGULATORS • DC –DC converters are power electronic circuits that convert a dc voltage to a different voltage level. • Applications of DC-DC Regulators- • Traction motor control in electric automobiles • Trolley cars • Marine Hoists • Forklift trucks • Mine Haulers
- 7. TYPES OF DC-DC REGULATORS There different kinds of DC-DC converters. A variety of the converter names are included here: • The BUCK converter • The BOOST converter • The BUCK-BOOST converter
- 8. BUCK BOOST REGULATOR Buck – boost converter is “ a DC to DC converter which either steps up or steps down the input voltage level”. The step up or step down of input voltage level depends on the duty ratio. Duty ratio or duty cycle is the ratio of output voltage to the input voltage in the circuit. Buck – boost converter provides regulated DC output.
- 9. OPERATION OF POWER CIRCUIT • Step-1: when mosfet is ON. • Voltage across inductor L is Vo (source voltage)
- 10. • Step-2:when mosfet is OFF. • Voltage across inductor L is Vo (in reverse direction). • Here output voltage developed across load is Vo. • Step-3: when mosfet is on in next cycle. Load is isolated from voltage source . In this case charged capacitor across load maintain voltage across load.
- 11. DUTY RATIO • Duty ratio(D) is defined as Ton/T. • here, Ton=ON Time • T= time period of gate signal. D=Ton/T Ton=DT T=Ton+Toff Toff=T-Ton Toff=T(1-D)
- 12. VOLTAGE ACROSS INDUCTOR • When mosfet is ON. Voltage across inductor L is equal to source voltage(V). • when mosfet is OFF. Voltage across inductor L is equal to output voltage(Vo).. • As average voltage across inductor is zero, • hence, V*D*T=Vo*(1-DT) Vo= VD/(1-D) FOR Buck Operation D=0 TO 0.5 FOR Boost Operation D=0.5 TO 1
- 13. COMPONENTS • MOSFET(Switch) • High Frequency Timer 555 IC • Inductor • Capacitor • Diodes • Resistors
- 14. Simulation circuit of the BUCK BOOST Converter
- 15. Simulation Result of Buck Boost Converter (i) For duty cycle=0.4 (buck mode):-
- 16. (ii)For duty cycle=0.8 (boost mode)
- 17. APPLICATIONS • It is used in the self regulating power supplies. • It has consumer electronics. • It is used in the Battery power systems. • Adaptive control applications. • Power amplifier applications.
- 18. Advantages of Buck Boost Converter • It gives higher output voltage. • Low operating duty cycle. • Low voltage on MOSFETs
- 19. Future Scope • The project can be expanded for buck- boost inverter applications where the bulky transformer can be eliminated. • The polarity reversal techniques can be adopted for positive output to meet the higher voltage requirements for voltage ratings up to 110DC. • Appliances requiring DC like LED bulbs, DC Motor based low power refrigerators / pumps for air-conditioners / mixers can be developed and promoted such the effective utilization of renewable energy is obtained. • Battery can be eliminated and direct utilization of renewable energy can be explored. • Harmonic analysis can be done to evaluate the performance of the device over longer durations. • Boost stage of buck boost circuit has to be further improved and tested for utilities like 24V DC motor, 32 V for printer applications.
- 20. REFERENCES • M. Calais, J. Myrzik, T. Spooner and V. G. Agelidis, “Inverters for single-phase grid connected photovoltaic systems – an overview,” Proc. IEEE Power Electronics Specialists Conference, PESC, 2002, pp. 1995-2000. • A.Kotsopoulos and D.G.Holmes,”Performance of a series –parallel resonant DC-DC converter module for high current low voltage applications”,IEE PEDEDS1998,2,pp.861- 866(1998). • K. Ogura, T. Nishida, E. Hiraki and M. Nakaoka, Shinichiro Nagai, “Timesharing Boost Chopper Cascaded Dual Mode Single-phase Sine wave Inverter for Solar Photovoltaic Power Generation System” Proc. Of 35th Annual IEEE Power Electronics Specialists Conference Aachen, Germany, 2004, pp.4763-4767. • J. H. R. Enslin and D. B. Snyman, " Combined Low-Cost, High-Efficient Inverter, Peak Power Tracker and Regulator for PV Applications", IEEE Trans. On Power Electronics, Vol. 6. no.1, January 1991.