A Three-Phase Hybrid Cascaded Multilevel Inverter with Multicarrier PWM technique

Multilevel voltage source inverter has drawn tremendous importance in the area of high power applications. This paper presents a three-phase modified hybrid cascaded multilevel inverter incorporating a standard three-leg inverter with H-bridge cells in series with each leg. The switching scheme with the multicarrier level shifted sinusoidal PWM is implemented to produce the five-level voltage at the output. Simulations have been performed using MATLAB to study voltage levels, modulation scheme, and THD. Finally, the possibilities of future works are addressed

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Three-phase Cascaded multilevel inverter using power cells with two inverter legs in series

2009 IEEE Energy Conversion Congress and Exposition ◽

10.1109/ecce.2009.5316460 ◽

2009 ◽

Cited By ~ 6

Author(s):

G. Waltrich ◽

I. Barbi

Keyword(s):

Multilevel Inverter ◽

Three Phase ◽

In Series ◽

Cascaded Multilevel Inverter

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Cascaded H-Bridge MLI and Three-Phase Cascaded VSI Topologies for Grid-Connected PV Systems with Distributed MPPT

International Journal of Photoenergy ◽

10.1155/2019/7642919 ◽

2019 ◽

Vol 2019 ◽

pp. 1-22 ◽

Cited By ~ 2

Author(s):

Abdullah M. Noman ◽

Khaled E. Addoweesh ◽

Ayman A. Alabduljabbar ◽

Abdulrahman I. Alolah

Keyword(s):

Multilevel Inverter ◽

Voltage Source ◽

Voltage Source Inverter ◽

Pv Systems ◽

Point Tracking ◽

Power Point Tracking ◽

Three Phase ◽

Power Point ◽

Cascaded Multilevel Inverter ◽

Inverter Topology

Cascaded multilevel inverter topologies have received a great deal of attention for grid-connected PV systems. In this paper, three-cascaded multilevel inverter configurations are proposed for grid-connected PV applications. These are the three-phase cascaded H-bridge multilevel inverter topology, three-phase cascaded voltage-source inverter topology using inductors, and three-phase cascaded voltage-source inverter topology using coupled transformers. Distributed maximum power point tracking (MPPT) of PV modules using perturbation and observation algorithm is used for all presented topologies. In all presented configurations, each PV module is connected to one DC-DC isolated Ćuk converter for best MPPT achievement. Simulation is achieved by using the SIMULINK environment. The simulation results show that the three proposed topologies function well in improving the grid’s power quality. The grid currents are kept in phase with the grid voltage to ensure unity power factor, and the THD of the grid currents are within the acceptable range. The proposed topologies are experimentally implemented in the lab, and the switching pulses are generated with the help of the MicroLabBox data acquisition system. Comparing the three topologies according to the number of switches, voltage, and current stresses on switches and THD of the generated voltages and grid currents and according to the efficiency has been achieved in this paper, both experimentally and by simulation. The simulation and experimental results and comparisons are presented to verify the proposed topologies’ effectiveness and reliability.

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Three-Phase Cascaded Multilevel Inverter Using Power Cells With Two Inverter Legs in Series

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2010.2043040 ◽

2010 ◽

Vol 57 (8) ◽

pp. 2605-2612 ◽

Cited By ~ 84

Author(s):

G Waltrich ◽

I Barbi

Keyword(s):

Multilevel Inverter ◽

Three Phase ◽

In Series ◽

Cascaded Multilevel Inverter

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Cascaded Symmetric Multilevel Inverter with Reduced Number of Controlled Switches

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v8.i2.pp795-803 ◽

2017 ◽

Vol 8 (2) ◽

pp. 795 ◽

Cited By ~ 1

Author(s):

Tila Muhammad ◽

Adnan Umar Khan ◽

Hanif Jan ◽

Muhammad Yasir Usman ◽

Junaid Javed ◽

...

Keyword(s):

High Power ◽

High Efficiency ◽

Low Cost ◽

Sine Wave ◽

Multilevel Inverter ◽

Voltage Source ◽

Multilevel Inverters ◽

Output Waveform ◽

Filter Size ◽

Cascaded Multilevel Inverter

Multilevel inverters have become popular among high power converters for the past few years due to their high quality output waveform and low total harmonic distortions (THD). In addition, the filter size also reduces significantly to achieve a pure sine wave output. Cascaded H-Bridge topology has been recognized as the most promising among various classical topologies for multi-level inverters on the basis of its modular form and ease of design, troubleshooting, packaging and high power capabilities. However, a large number of switches are required in cascaded H-Bridge multilevel inverter that leads to larger system losses and an increase in cost. In this paper the modified cascaded topology is proposed to reduce the number of controlled switches without affecting the resolution of output waveform or the number of voltage levels. We achieved this by replacing some of the high cost controlled transistor switches with diodes, in the cascaded H-Bridges. Furthermore, equal voltage source sharing is also possible by using the proposed topology. Hence the proposed inverter is a type of cascaded multilevel inverter with reduced switches, better modular structure, low cost and high efficiency. The inverter design is validated using simulations and tested on hardware prototype.

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