New single phase asymmetric multilevel inverter with reduced number of power switches

2017 ◽  
Author(s):  
V. Thiyagarajan ◽  
P. Somasundaram
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Power Switches

Switching Modulation Strategies for Multilevel Inverter

2021 ◽  
Vol 20 (2) ◽  
pp. 1-7
Author(s):  
Jahanzeb - ◽  
Shahrin Md. Ayob ◽  
Saifullah Khan ◽  
Mohd Zaki Daud ◽  
Razman Ayop
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Level Control ◽  
Multilevel Inverters ◽  
Power Switches ◽  
Modulation Schemes ◽  
Multicarrier Pwm

There is always a need to create efficient and optimized converters to deliver the best possible results to achieve a better THD profile in the waveform output. One way is by controlling the switching of the power switches of the converters using appropriate modulation schemes. While numerous works have been done in proposing new switching modulation strategies for multilevel inverters, this work will compare multicarrier PWM and near-to-level control (NLC) modulation schemes. In this paper, multicarrier PWM variants, namely, PD-PWM, POD-PWM, and APOD-PWM, are designed and simulated. Their voltage THD and spectrum performance are discussed when applied to single-phase 7, 9, and 11-level cascaded multilevel inverters. Then NLC modulation will be designed and applied to similar multilevel inverter circuits. It will be shown that the NLC exhibits some superior performances compared to PWM-based but with several drawbacks that can be optimized. 

Reduction in controlled power switches for a single-phase novel multilevel inverter

2019 ◽  
Vol 106 (8) ◽  
pp. 1200-1215 ◽  
Author(s):  
Bidyut Mahato ◽  
Saikat Majumdar ◽  
Kartick Chandra Jana
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Power Switches

scholarly journals Modeling and Simulation of Nine-Level Cascaded H-Bridge Multilevel Inverter

2018 ◽  
Vol 11 (2) ◽  
pp. 696
Author(s):  
A.A. Zulkefle ◽  
A.I.A. Rahman ◽  
M. Zainon ◽  
Z.A. Baharudin ◽  
Z. Zakaria ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Single Phase ◽  
Multilevel Inverter ◽  
Pwm Control ◽  
Voltage Level ◽  
Matlab Simulink ◽  
Number Of Components ◽  
Control Scheme ◽  
Power Switches

This paper analyzed a single phase nine level cascaded h-bridge multilevel inverter (CHMLI) topology in which requires lesser number of components and easier to control if compared to other methods. The inverter of different voltage levels (up to 9-Levels) are designed and simulated using MATLAB Simulink. A Level Shifted Multi-Carrier PWM control scheme is used to control the operation of the power switches for CHMLI topology. The results are compared in terms of THD.  The value of THD is found to be reduced as the number of voltage level of CHMLI is increased.

scholarly journals FPGA Implementation of a Three-Level Boost Converter-fed Seven-Level DC-Link Cascade H-Bridge inverter for Photovoltaic Applications

Electronics ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 282 ◽  
Author(s):  
Nagaraja Sulake ◽  
Ashok Devarasetty Venkata ◽  
Sai Choppavarapu
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Boost Converter ◽  
Pulse Generation ◽  
Operating Conditions ◽  
Multilevel Inverter ◽  
Resistive Load ◽  
Voltage Waveform ◽  
Power Switches ◽  
Generation Unit

This paper presents an optimized single-phase three-level boost DC-link cascade H-bridge multilevel inverter (TLBDCLCHB MLI) system to generate a seven-level stepped output voltage waveform for photovoltaic (PV) applications. The proposed TLBDCLCHB MLI system is obtained by integrating a three-level boost converter (TLBC) with a seven-level DC-link cascade H-bridge (DCLCHB) inverter. It consists of a TLBC, level generation unit (LGU) and phase sequence generation unit (PSGU). When compared with traditional boost converter-fed multilevel inverter systems, the proposed TLBDCLCHB MLI system requires a single DC source, fewer power switches and gate drivers. Reduction in the switch count and number of DC sources makes the system cost effective and requires a smaller installation area. Pulse generation for the power switches of an LGU in a DCLCHB inverter is accomplished by providing proper conducting angles that are generated by optimized conducting angle determination (CAD) techniques. In this paper two CAD techniques i.e., equal-phase CAD (EPCAD) and step pulse wave CAD (SPWCAD) techniques are proposed to evaluate the performance of the proposed system in terms of the total harmonic distortion (THD) and the quality of the stepped output voltage waveform. The proposed system has been modeled and simulated using MATLAB/SIMULINK software. Results are presented and discussed. Also, a prototype model of a single-phase TLBDCLCHB MLI system is developed using a field-programmable gate array (FPGA)-based pulse generation with a resistive load and its performance is analyzed for various operating conditions.

scholarly journals Realization of a Single-Phase Multilevel Inverter for Grid-Connected Photovoltaic System

2018 ◽  
Vol 8 (5) ◽  
pp. 3344-3349 ◽  
Author(s):  
A. Nouaiti ◽  
A. Mesbahi ◽  
A. Saad ◽  
M. Khafallah ◽  
M. Reddak
Keyword(s):  
Power Flow ◽  
Single Phase ◽  
Test Bench ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Panels ◽  
Direct Power ◽  
Current Controller ◽  
Power Switches ◽  
Sinusoidal Current

This paper introduces the implementation of a single-phase multilevel inverter for a grid-connected photovoltaic system. The considered topology contains a full bridge converter tied to an auxiliary circuit made of two power switches. A proportional integral (PI) current controller is established with this inverter to inject a sinusoidal current into the grid with a power factor near to unity. The studied system is tested on Matlab/Simulink and verified by experiment through a test bench comprising of a fabricated prototype and a DSP TMS320F28379D. The obtained results prove the efficiency of the inverter to maintain a direct power flow from DC sources, such as solar panels, to the grid by respecting some normalized criteria for this operation.

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