ABSTRACT:
Solar Grid-Tied Inverter system is an electricity generating
system that is connected to the utility grid. This paper discusses the design
of a Grid-Tied Inverter (GTI). The first stage is Maximum Power Point Tracking
(MPPT) which is implemented using perturb and observe algorithm. Then push pull
converter is used to convert DC output from MPPT stage to 330V dc. This DC
voltage is then converted into AC voltage using full-wave inverter topology
employing unipolar SPWM technique. Then synchronization is achieved between
grid and photovoltaic system. Finally, power flow control mechanism controls
the power flow from GTI system to the grid and the house load.
KEYWORDS:
1.
Grid-tied inverter
2.
SPWM
3.
Power flow
4.
MPPT
SOFTWARE: MATLAB/SIMULINK
CIRCUIT DIAGRAM:
Figure
1. Cuk converter.
Figure
2. Full wave inverter topology .
EXPECTED SIMULATION RESULTS:
Figure
3. Inverter output before filter
Figure
4. Inverter output after filter.
Figure
5. Simulink circuit to demonstrate power flow.
Figure
6. GTI output power.
Figure
7. Grid output power.
Figure
8. Power through inductor.
Figure
9. GTI output power.
Figure
10. Grid output power.
Figure
11. Power through inductor.
REFERENCES:
[1]
Power Electronics: Circuits, Devices and Applications, 3/E by M. H. Rashid,
Prentice Hall, 2004J. Clerk Maxwell, A Treatise on Electricity and Magnetism,
3rd ed., vol. 2. Oxford: Clarendon, 1892, pp.68–73.
[2]
Electric Machinery Fundamentals by Stephen J. Chapman, 4th Edition,
McGraw-Hill, 2005K. Elissa, “Title of paper if known,” unpublished.
[3]
M. A. Salam, Fundamentals of Power Systems, Alpha Science Oxford, UK
International Ltd., 2009.
[4]
T. Kwang and S. Masri, “Grid Tie Photovoltaic Inverter for Residential
Application,” Modern Applied Science, vol. 5, No. 4, Aug. 2011, pp. 3-4,
doi:10.5539/mas.v5n4p200
