The document discusses a novel online variable topology-type grid-connected inverter designed to enhance the efficiency and generation range of photovoltaic systems. It introduces a bidirectional power switch that allows the inverter to operate in two modes depending on the output voltage of the connected photovoltaic arrays. Experimental results validate the theoretical analysis and demonstrate the feasibility of this innovative inverter design.

1. OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

2. DOCUMENT FORMAT
• Abstract:
• Introduction:
• Literature Survey:
• System Analysis:
• Existing System:
• Disadvantages:
• Proposed System:
• Advantages:
• System Requirements:
• Block Diagram:
• Working Flow Diagram:
• Circuit Diagram:
• Implementation:
• Modules Description:
• System Study:
• System Testing:
• Software Description:
• Sample code:
• Conclusion:
• Future Enhancement:
• References:
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

3. ONLINE VARIABLE TOPOLOGY-TYPE
PHOTOVOLTAIC GRID-CONNECTED INVERTER
TITLE
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

4. ABSTRACT
In photovoltaic (PV) grid-connected generation system, the key focus is how to expand
the generation range of the PV array and enhance the total efficiency of the system. This paper
originally derived expressions of the total loss and grid current total harmonics distortions of
cascaded inverter and H-bridge inverter under the conditions of variable output voltage and power of
the PV array. It is proved that, compared with the H-bridge inverter, the operation range of the
cascaded inverter is wider, whereas the total loss is larger. Furthermore, a novel online variable
topology-type grid-connected inverter is proposed. A bidirectional power switch is introduced into
the conventional cascaded inverter to connect the negative terminals of the PV arrays. When the
output voltages of the PV arrays are lower, the proposed inverter works under cascaded inverter
mode to obtain wider generation range. When the output voltages of the PV arrays are higher, the
proposed inverter is transformed into equivalent H-bridge inverter mode to reduce the total loss.
Thus, wider generation range and higher efficiency are both implemented. Specific demonstration of
the proposed inverter based on five-level cascaded inverter is presented. The detailed experimental
results verify the accuracy and feasibility of the theoretical analysis and the proposed inverter
topology.
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

5. CONTACT
MOBILE No:
99436 99916
99436 99926
99436 99936
E Mail:
i3eprojectskarur@gmail.com
Web:
www.i3etechnologies.com
www.i3eprojects.com
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

6. ADDRESS
#23A, 2nd Floor SKS Complex,
Bus Stand Opp. Karur-639 001.
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

7. Course
Embedded System,
PLC,
MATLAB,
Hardware & Networking.
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936

8. We Develop IEEE Software &
Hardware Projects
THANK YOU FOR
WATCHING
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE /BANGALORE / HYDRABAD
CELL: +91 99436 99916 / 99436 99926 / 99436 99936