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To Design a High Voltage Transformer-less Solar Inverter with Input High Voltage Regulator

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Project Members

Luqman Ahmed (EE-804)Syed Usama Hassan (EE-803)Chaudry Asad ur Rehman (EE-788)

Project AdvisorA/P Muhammad Farhan Khan 

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Agenda:

•General Idea •Goals• Impact•Block Diagram• Solar Panel•Buck-Boost Converter• Inverter

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1. General IdeaTo design a battery-less systemHigh voltage and transformer

less solar inverterCost effectiveEfficientContinuous supply of power

without any interruption(day-time)

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Problem StatementConventional Solar Systems

Low input voltage Transformer problems Battery System Sizes Maintenance Price

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Conventional Systems (1KW)Battery bank may cost 15,000 PKR.

Most of the price in an inverter is covered by its transformer. A transformer in each system takes approximately 5,500 PKR to make 1K W system.

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Motivation / AimUsage of high input voltageTo overcome the Battery issue Transformer-less inverterLess maintenance To minimize the price Energy Efficient System

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Our System (1KW)

No cost of batteries (saves 15,000 PKR)

No cost of Transformers (saves 5,500 PKR)Less heavier, easily portable

Buck-Boost converter for regulation

Transformer-less inverter due to high input voltage

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5. Block Diagram

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4. ImpactEnhancement in power Engineering:Enlargement and application of our planned project would not only give the investigators and students a chance to go in depth about the study and visualization of the modern concepts of power engineeringLarge scale:It will let the Engineers all across Pakistan to think about same sort of idea on a larger scale. Renewal energyThese phases, would provide us a path on walk on for the further development of renewal energy sources with least environment damage

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6. Solar Panels

Solar Panel can be designed by 4 types of solar cells1- Mono crystalline solar cell 2- Poly crystalline solar cell 3- All black and 4- HybridIn our project we are using that solar panels which consists of mono crystalline solar cells

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Benefits of Mono crystalline Solar Panels over others

Some solat websites suggest that single crystalline solar panels can last up to 50 years.

They have high efficiency. Greater Heat Resistance.

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Comparison chartMonocrystalline Polycrystalline

Typical module efficiency 15-20% 13-16%

Best research cell efficiency 25.0% 20.4%

Area required for 1 kWp 6-9 m2 8-9 m2

Typical length of warranty 25 years 25 years

Lowest price 0.75 $/W 0.62 $/W

Temperature resistance

Performance drops 10-15% at high temperatures

Less temperature resistant than monocrystalline

Additional detailsOldest cell technology and most widely used

Less silicon waste in the production process

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Buck-boost Regulator:A Buck-Boost converter is a type

of switched mode power supply that combines the principles of the Buck Converter and the Boost Converter in a single circuit. It provides a regulated DC output voltage from either an AC or a DC input.

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Operation as a Buck Converter:

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Operation as a Boost Converter

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Combined Operation

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Inverters

Input voltage

• 12 VDC, for smaller consumer and commercial inverters that typically run from a rechargeable 12V lead acid battery.• 24 and 48 VDC, which are common standards for home energy systems.• 200 to 400 VDC, when high power output is required

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General Diagram

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Approximate CostCost of the Project: 75,500 PKR

Cost of Solar Panels: 1,10,000 PKR

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Conclusion