International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 01 | Jan -2017
p-ISSN: 2395-0072
www.irjet.net
Solar Power Generation with Capacitor Based Seven Level Inverter System D. Venkateswarlu Naik1 , Venkateswarareddy. G2
M. Tech scholar, Department of EEE , Sai Tirumala NVR Engineering College, Narasaraopet, India Assistant professor, Department of EEE, Sai Tirumala NVR Engineering College, Narasaraopet, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - The proposed system is composed of
be widely used in residential applications in the
a dc/dc power converter and a new seven- level
near future.
inverter, produced seven level output voltage.
The power conversion interface is important to grid
The proposed inverter reduced the switching
connected solar power generation systems because
losses, complexity, size and cost. This new
it converts the dc power generated by a solar
seven-level inverter is configured using a
system into ac power and feeds this ac power into
capacitor selection circuit and a full-bridge
the utility grid. An inverter is necessary in the
converter. The capacitor selection circuit
power conversion interface to convert the dc power
converts the two output voltage sources of dc–
to ac power. Since the output voltage of a solar
dc converter into a three-level dc voltage, and
system is low, a dc–dc power converter is used
the full-bridge converter further converts three-
step-up the output voltage level, so it can match the
level dc voltage into a seven-level ac voltage.
dc bus voltage of the inverter. The power
The PWM signals are generated by using fuzzy
conversion efficiency of the power conversion
logic controllers.
interface is important to insure that there is no
Key Words: seven-level inverter, capacitor selection circuit, fuzzy logic, dc-dc converter.
waste of the energy generated by the solar system.
I. INTRODUCTION
switching harmonics. The voltage change in each
The power loss is proportional to the amount of
The extensive use of fossil fuels has resulted in the
switching operation for a multilevel inverter is
global problem of greenhouse emissions. Moreover,
reduced in order to improve its power conversion
as the supplies of fossil fuels are depleted in the
efficiency and the switching stress of the active
future, they will become increasingly expensive.
devices, the amount of switching harmonics is also
Thus, solar energy is becoming more important
attenuated, so the power loss caused by the filter
since it produces less pollution and the cost of fossil
inductor is also reduced. Therefore, multilevel
fuel energy is rising, while the cost of solar arrays is
inverter technology has been the subject of much
decreasing. In particular, small-capacity distributed
research over the past few years.
power generation systems using solar energy may © 2017, IRJET
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