Development Of Dual PV system with FPGA for Multilevel Inverters

Project Title

Development Of Dual PV system with FPGA for Multilevel Inverters

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

The employment of Power Electronics has increased swiftly as the world is heading towards more energy efficient transmission and utilization of energy resources. We require conversion of electricity from one form to another in order to efficiently transform and exploit Electrical Energy. Hence a circuit called converter is used for better performance and to improve power quality. Power Electronics plays a vital role in conversion. Different Power Electronics Converters are used according to output needed. The converter for AC to DC is called rectifier, converter for DC to DC to change Voltage is called chopper, and from DC to AC is called as Inverter. This project is based on the multilevel inverter for PV system. In multilevel inverter different topologies are applied. This proposed project is based on the Cascaded H-Bridge Multilevel Inverter for PV system. The main privilege of multilevel inverter over single level inverter is that we get less distortion, harmonics and purely AC sine wave that is suitable for the devices requiring AC for their operation.

                                Among all sustainable power resources, photovoltaic vitality is one of the most extensive resources from the perspective of being generally accessible, plentiful and cost free. Nowadays, modern industrial applications have started to require high power. Few applications require medium or low power for their operation. A multilevel inverter is a power electronic device, used for acquiring required AC voltage level at the output by using different lower level DC voltages at input. They are also used to maintain the good power quality, low switching losses and high voltage capacity.

                                There are numerous multilevel topologies introduced, the most well-known and widely used topology is the cascaded H-bridge multilevel inverter which have arrangements associated with different inverters. The multilevel inverter has some advantages over the conventional inverter. The main downside is that, it utilizes a major number of semi-conductor switches. The inverter used in PV system, a proportional integral (PI) current control plan is employed to keep the output current sinusoidal and to have dynamic execution. The multilevel topology is a sensible decision in PV frameworks at different power levels. So, we collectively decided to make our final year thesis on this topic in which we technically use the  multilevel inverter to  improve connected PV modules, output waveforms, smaller filter size, efficiency increase and lower the total harmonics distortion, the output waveforms are much improved over conventional inverter, and we will suggest about its better performance enhancement and technology.

Project Objectives

RESEARCH OBJECTIVES

• It will produce output voltage waveform of the Multilevel Inverter (MLI) with less harmonic distortion.
• The multilevel inverter topology will help to improve the utilization of connected PV modules if the voltage of the separate DC links is controlled independently.
• The multilevel inverter topology will help to improve the utilization of connected PV modules if the voltage of the separate DC links is controlled independently.
• The proposed inverter is designed as isolated inverter, but the design and modulation scheme may be changed to control the common mode ground leakage current between the PV module and the grid if it is installed for grid connected inverter.
• This proposed topology will increase the overall efficiency of the system.

Project Implementation Method RESEARCH METHODOLOGY Firstly, we will start by accumulating the relevant information on Multilevel Inverter Topologies and its modulation techniques. Three different multilevel inverter topologies are proposed and one of the topologies is chosen as the focus of the project for comparison purpose in terms of operation and characteristics.The cascaded H-bridge topology of multilevel inverter is choosen as mostly used topology because of advantages over other topologies. Initally we start our working from simulation on MATLAB/Simulink, after getting some results we will start prototype designing and after hardware we compare the results. After successful complettion of project we finally implement this project. Benefits of the Project

ADVANTAGES OF THE PROJECT

• The multilevel inverter proposed in this project will give us sinusoidal voltage free from the distortions and harmonics which are dangerious for AC loads.
• This proposed inverter produces more accurate results and offers reduced power loss with high output power quality.
• It will improve the over all efficiency of the system.
• It rduces the overall cost of the system.
• In future, The proposed inverter may be implemented with low cost microcontroller because the system is reliable.
• It increases the reliability of the system and gives us transients and harmonics free sinusoidal waveform.

Technical Details of Final Deliverable

A multilevel inverter is a power electronic device, used for acquiring required AC voltage level at the output by using different lower level DC voltages at input. They are also used to maintain the good power quality, low switching losses and high voltage capacity.This proposed project is based on the Cascaded H-Bridge Multilevel Inverter for PV system. The main privilege of multilevel inverter over single level inverter is that we get less distortion, harmonics and purely AC sine wave that is suitable for the devices requiring AC for their operation. 

Final Deliverable of the Project HW/SW integrated systemCore Industry Energy Other IndustriesCore Technology Clean TechOther TechnologiesSustainable Development Goals Affordable and Clean EnergyRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	74900
FPGA kit	Equipment	1	16400	16400
IGBT	Equipment	30	500	15000
Gate drivers	Equipment	30	130	3900
DC source	Equipment	2	7100	14200
LC filter	Equipment	5	1100	5500
PV panels	Equipment	2	1100	2200
Switches	Equipment	20	200	4000
Connecting wires	Equipment	100	20	2000
Soldering Machiine	Equipment	1	2100	2100
Transport	Miscellaneous	3	1500	4500
Booklets	Miscellaneous	1	500	500
Multimeter	Equipment	1	1000	1000
Stationary	Miscellaneous	1	1000	1000
Inverter drives	Equipment	2	1300	2600