New Topology Of Asymmetrical Nine-Level Cascaded Hybrid Bridge Multilevel Inverter
25 May 2021-pp 430-434
TL;DR: In this paper, a new concept of asymmetrical cascaded hybrid bridge multilevel inverter (ACHB-MLI) was presented to produce nine-level output waveform with only seven switches and two DC supplies instead of sixteen switches and four DC supplies used in the conventional cascaded HB- MLI. And the proposed topology is investigated under phase disposition pulse width modulation technique (PD-PWM) and the results have been compared with conventional HBM inverter.
Abstract: recently the researchers in multilevel inverter (MLI) have interested in reducing the number of switches and sources with acceptable total harmonic distortion (THD %) of the output voltage waveform to reduce losses and costs. This paper present a new concept of asymmetrical cascaded hybrid bridge multilevel inverter (ACHB-MLI) to produce nine-level output waveform with only seven switches and two DC supplies instead of sixteen switches and four DC supplies used in the conventional cascaded hybrid bridge multilevel inverter (CHB-MLI). The proposed topology is investigated under phase disposition pulse width modulation technique (PD-PWM) and the results have been compared with conventional cascaded multilevel inverter. The simulation results are provided using MATLAB Simulink.
Citations
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23 May 2022
TL;DR: In this paper , a single phase asymmetrical CHB-MLI that uses only 7 switches and 2 DC supplies to generate a 9-level output waveform was proposed as against the use of 16 switches and 4 DC supplies in a conventional CHBMLI.
Abstract: To reduce losses and expenses, multilevel inverter (MLI) researchers have recently been focused in minimizing the number of switches and providing the appropriate level of total harmonic distortion (THD %) of the output voltage waveform. In this paper, a single phase asymmetrical CHB-MLI that uses only 7 switches and 2 DC supplies to generate a 9- level output waveform was proposed as against the use of 16 switches and 4 DC supplies in a conventional CHB-MLI. The study was carried out using MATLAB Simulink; the inverter was also installed and operated in actual experiments. The results obtained from MATLAB Simulink were compared with the results of the actual experiments. The phase disposition pulse width modulation approach Which symbolizes (PD-PWM) as was used to control the suggested topology.
2 citations
TL;DR: In this paper , a new multilevel inverter is used in adding a (bidirectional) two way switch in between the capacitor and a traditional H-bridge module, which produces a better sine wave.
Abstract: Introduction. In this world of technical advancement, conventional resources are at the stage of destruction. To avoid such problems, we are going to use an alternative energy source namely solar by photovoltaic effect. The demand for multilevel inverters increased as they are used for different dynamic (high) voltage and dynamic (high) power appliances as they are capable of producing the output wave shape with low total harmonic distortion. Novelty. A new multilevel inverter is used in adding a (bidirectional) two way switch in between the capacitor and a traditional H-bridge module. This produces a better sine wave. By series connection of these two H-bridge modules, nine levels output voltage including zero is possible. The purpose of the proposed topology is reduction in the number of switches and it gives the good result with comparatively less power loss when it is compared with the other normal basic traditional inverters of the same output quality. Methods. In this paper, sinusoidal pulse width modulation technique is used for the working of the switches in the multilevel inverter. The results are verified by using simulation and also experimental setup is done. From the results it is observed that the proposed topology with reduced number of switches gives lower electromagnetic interference, lower harmonic distortion. Practical value. The total harmonic distortion value in the simulation is 14.4 % and practically it is 13.8 %.
1 citations
11 Feb 2022
TL;DR: In this article , the authors proposed a cascaded H bridge MLI architecture to reduce the filter requirement for the production of AC, which has many advantages over the conventional two-level inverter.
Abstract: Multilevel inverters area unit utilized in varied sectors, further as in domain, for medium voltage and high power applications. MLI generates the specified output within the variety of stepped waveforms with low harmonics. Various voltage levels in MLI can be used to generate alternating voltage with a step structure. With less harmonic distortion, this is similar to sinusoidal waveforms. Traditional MLI has the disadvantage of necessitating a wider range of components, which increases the quality of gate pulse generation. As a consequence, its general price rises. MLI topologies with more power switches have a higher number of harmonics in their output voltage waveform. This work proposes a cascaded H bridge MLI architecture to address these issues. This type of MLI reduces the filter requirement for the production of AC. For modern technical development in industries or power sectors cascaded MLI is used. It has many advantages over the conventional two-level inverter. This topology wants fewer elements once it's compared to the traditional topologies. The most important issue of this investigation is the simulation results of three, five, seven, and nine level Single-Phase CHBMLI, as well as their THD values. The THD is discussed for each level with the help of the simulation result. In this proposed method SPDM technique using Triangular Multiple Carrier waves is used. MATLAB/ SIMULINK software system is employed to simulate all configurations and therefore the results of every level are compared.
05 May 2022
TL;DR: In this paper , a multilevel inverter has been implemented to attain 27 voltage levels using 13 switch counts and the proposed model presented in this paper have been simulated in MATLAB/Simulink software package and the THD of the respective output from the model has been determined by FFT analysis option provided in software.
Abstract: From a simple power backup system for home to high power HVDC transmission of electricity, inverter plays a vital role in converting the DC power into sinusoidal AC. From the prospective of utilization of renewable energy, solar power comes first among all and it is only capable of giving DC power as its output. Again, in order to utilize that DC power to run our household appliances, inverter comes into picture. Since the invention of inverter is constantly undergone many technological advancements, starting from development of switching gates, advancement in the power handling capacities and increasing efficiency. Reducing the switching loss, increasing the level, reducing harmonics and improvement in triggering circuitry is now the research area in the field of inverter. This paper presents the modelling and control of multilevel inverter. Here the series topology is implemented to attain 27 voltage levels using 13 switch counts. The proposed model presented in this paper have been simulated in MATLAB/Simulink software package and the THD of the respective output from the model has been determined by FFT Analysis option provided in software.
21 Dec 2022
TL;DR: In this article , an AFE topology based three-phase inverter is presented in which three phase output is obtained at the output of the inverter without any external filtering circuit.
Abstract: End (AFE) topology based three-phase inverter are presented in this paper. The inverter belongs to Infinite Level (ILI) Multi-level Inverters (MLI) with Reduced Switch Count. The circuit consists of three dc to dc buck converters connected to the individual legs of the six switch three-phase inverter. Three phase output is obtained at the output of the inverter without any external filtering circuit. The dc bus utilization is also improved by using third harmonic injection. The three-phase induction motor is considered as load and performance is evaluated for full load conditions. AFE based ILI reduces the switching and conduction losses as only one switch is switching at high frequency per phase.
References
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01 Nov 2006
TL;DR: In this paper, the performance of a 5-level cascaded H-bridge multilevel inverter (CHMI) based on a multi-carrier sinusoidal pulse width modulation (MSPWM) control technique is analyzed.
Abstract: Previous works have pointed out the limitations of conventional inverters especially in high voltage and high power applications. In recent years, multilevel inverters are becoming increasingly popular for high power applications due to its improved harmonic profile and increased power ratings. Works on the aspect of topology, control techniques and applications of multilevel inverters have been reported in literatures. However, there are no concrete findings that actually discuss or evaluate the performance of a three-phase multilevel inverter. This paper presents some analysis on the performance of a 5-level cascaded H-bridge multilevel inverter (CHMI) based on a multi-carrier sinusoidal pulse width modulation (MSPWM) control technique. Performance analysis are made based on the results of a simulation study conducted on the operation of the CHMI using MATLAB/Simulink. The performance parameters chosen in the work include the waveform pattern, harmonic spectrum, fundamental value, and total harmonic distortion (THD) of the three-phase CHMI output voltage. From the results of the simulation study and the analysis conducted, several distinct features of the three-phase 5-level CHMI employing the MSPWM control scheme, in particular the phase disposition (PD) type of the carrier disposition (CD) method from the aspect of line voltage have been identified.
47 citations
01 Jul 2016
TL;DR: In this article, a new single-phase multilevel inverter topology is presented, which is capable of producing nine-level output voltage with reduce device counts by arranging available switches and dc sources in a fashion such that the maximum combination of addition and subtraction of the input dc sources can be achieved.
Abstract: In this paper a new single-phase multilevel inverter topology is presented. Proposed topology is capable of producing nine-level output voltage with reduce device counts. It can be done by arranging available switches and dc sources in a fashion such that the maximum combination of addition and subtraction of the input dc sources can be achieved. Comparison between the existing topologies shows that the proposed topology yields less component counts. To verify the viability of the proposed topology, the circuit model is developed and simulated in Matlab-Simulink software. A low frequency switching strategy is also proposed in this work. The results show that the proposed topology is capable to produce a nine-level output voltage with less number of component counts and acceptable harmonic distortion content.
12 citations
16 May 2020
TL;DR: Various pulse width modulation (PWM) techniques for modular multilevel converter (MMC) are studied and compared and numerical Simulation are performed under MATLAB/Simulink environment for various PWM techniques in order to verify the effectiveness of the presented techniques for the different levels.
Abstract: Various pulse width modulation (PWM) techniques for modular multilevel converter (MMC) are studied and compared in this work. The analysis of both level-shift (LS) methods and phase-shift (PS) methods are conducted. This analysis is based on the fundamental pulse and pattern generations which only result from the comparison of triangular carrier and sinusoidal reference signals. The two fundamental PWM methods (LS and PS methods), are used for N+1 or 2N+1 phase-to-neutral voltage levels at the output of the converter. A comparative study is carried out on the basis of the spectral quality of the output voltage waveforms. Numerical Simulation are performed under MATLAB/Simulink environment for various PWM techniques in order to verify the effectiveness of the presented techniques for the different levels.
10 citations
01 Feb 2018
TL;DR: A review on multi level inverter topologies and control schemes of multilevel inverters for renewable energy conversions is presented.
Abstract: As the concerns about global warming and change in climate increases, a large focus is on improving distributed energy sources, which includes renewable energy sources. Renewable energy is the future source of energy. Improvement in power electronics has played an important role in incorporating the usage of renewable energy in our day-to-day life. Integrating various energy sources by means of converters by providing very high efficiency, good quality of power and reliability has become an important issue in these days. Most of Distributed Energy Resources (DERs) supply DC supply that varies over a wider rage, depending on load conditions. Therefore, a DC to AC power interface compatible with various standards is necessary. Multi-level inverters are apt for such applications since they can provide high volt-ampere ratings especially in renewable energy powered applications. This paper presents the A review on multi level inverter topologies and control schemes of multilevel inverters for renewable energy conversions.
10 citations
01 Dec 2017
TL;DR: A basic module for symmetrical multilevel inverter composed of cascaded basic unit with H-bridge and multi-carrier based level-shift pulse width modulation scheme, which results in reduction of number of components compared to other conventional and recent multileVEL inverters.
Abstract: This paper introduces a basic module for symmetrical multilevel inverter. The proposed multilevel inverter is composed of cascaded basic unit with H-bridge. Multi-carrier based level-shift pulse width modulation scheme is developed to achieve the switching signals for switches. The proposed cascaded multilevel inverter results in reduction of number of components compared to other conventional and recent multilevel inverters. The performance and operation of proposed inverter is verified through simulation results through MATLAB/Simulink software and experimental implementation of single phase 11-level inverter.
10 citations