ABSTRACT:
The
multilevel inverters (MLI) are resourceful in producing a voltage waveform with
superior-quality staircase counterfeit sinusoidal and depressed harmonic
distortion (THD). Several conventional topologies are proposed to realize the
MLI however, the limitations of these topologies may involve more DC sources
and power-switching devices, and less THD, which in turn, increases the cost
and size of the inverter. These drawbacks can be eliminated with the proposed
hybrid Cascaded H-Bridge Multilevel Inverter with reduced components topology.
As compared with the established MLI topologies the recommended topology having
a reduced number of DC sources, power-switching devices, component count level
factor, lesser TSV, more efficient, lesser THD, and cost-effective. The
proposed MLI is a blend of a single-phase T-Type inverter and an H-Bridge
module made of sub switches. This article incorporates the design and simulation
of the multilevel inverter with staircase PWM technique. Further, the 9-level
and 17-level MLI is examined with different combinational loads. The proposed
inverter is stable during nonlinear loads, and it is well suited for FACTS and
renewable energy grid-connected applications. An operational guideline has been
explained with correct Figures and tables. The Output voltage wave is realized
in numerical simulation. Finally, the experimental demonstrations were
performed by implementing a hardware prototype setup for both linear and
nonlinear loads using the dSPACE controller laboratory.
KEYWORDS:
1. Hybrid
cascaded H-bridge multilevel inverter with reduced components
2. Pulse width modulation (PWM)
3. Total
harmonics distortion (THD)
SOFTWARE:
MATLAB/SIMULINK
CONCLUSION:
In
this article, a hybrid Cascaded H-Bridge Multilevel Inverter with reduced
components topology was presented. The proposed basic MLI builds a voltage with
nine levels and extended to seventeen levels by cascading. This topology uses
lesser power switches that reduce the price and volume of the inverter and
improves efficiency. The proposed inverter requires relatively less power
electronic components to generate the desired output than other similar
topologies. Comparative analysis shows that the proposed topology has a
superior cost factor per level. In the output, the proposed inverter's harmonic
content is comparatively less than similar Cascaded H-Bridge MLI for both
linear and nonlinear loads with nearly more efficiency _. The proposed inverter
is stable during nonlinear loads, and it is well suited for FACTS and renewable
energy grid-connected applications. To authenticate the proposed inverter
satisfactory simulation is done in MATLAB/Simulink. The experimental setup is
assembled in the laboratory confirmations unique with more significant output
voltage levels, having lower harmonic content and reduced power switches, and
greater efficiency. Subsequently proposed inverter appears some encouraging
properties when compared with various similar topologies.
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