An Experimental Analysis of Seven Level Cascaded H-Bridge Multilevel inverter for Harmonic Minimization By K.Mahendran (original) (raw)

IJERT-Reduction of Harmonics using Seven Level Cascaded Multilevel Inverter

International Journal of Engineering Research and Technology (IJERT), 2014

https://www.ijert.org/reduction-of-harmonics-using-seven-level-cascaded-multilevel-inverter https://www.ijert.org/research/reduction-of-harmonics-using-seven-level-cascaded-multilevel-inverter-IJERTV3IS030356.pdf Multilevel inverter technology has emerged in recent times as a very important different in the area of high-power medium-voltage energy control. In this paper, cascaded multilevel inverter is used to reduce the total harmonic distortion. A cascaded multilevel inverter consists of series H-bridge (single-phase, full-bridge) inverter units. By reducing the number of switches, the multilevel topology has been improved for high power applications. To improve the multilevel inverter topologies for high quality and high power applications by reducing the number of switches. Therefore an identical H-bridge module is used to improve manufacturability and modularity. Proposed method not only reduces the number of switches, besides it produces the variable AC voltage waveform without harmonics. The simulation is done by MATLAB Simulink software.

Performance Analysis of H-bridge and T-Bridge Multilevel Inverters for Harmonics Reduction

International Journal of Power Electronics and Drive System (IJPEDS), 2018

This paper deals with the design of cascaded 11 level H- bridge inverter. It includes a comparison between the 11 level H-bridge and T-bridge multilevel inverter. The cascaded inverter of higher level is a very effective and practical solution for reduction of total harmonic distortion (THD).These cascaded multilevel inverter can be used for higher voltage applications with more stability. As the level is increased the output waveform becomes more sinusoidal in nature. The inverter is designed using multicarrier sinusoidal pulse width modulation technique for generating triggering pulses for the semiconductor switches used in the device. Through this paper it will be proved that a cascaded multilevel H-bridge topology has higher efficiency than a T-bridge inverter, as whichever source input voltage is provided since input is equal to the output voltage. In T-bridge inverter, the output obtained is half of the applied input, so efficiency is just half as compared to H-bridge. The output waveform is distorted and has higher THD. The simulation is performed using MATLAB /Simulink 2013 software.

Harmonic Minimized of Cascaded H-Bridge Multilevel Inverter Using PV system

volume 1, issue 1, Feb-2014, IJRST

This paper focusing on the harmonic minimization of 11-level cascaded H-multilevel inverter using PV systems with a Pulse Width Modulation (PWM) control scheme. The photo-voltaic arrays are connected to eleven level multilevel inverter through DC-DC boost converter. By implementing maximum power point tracking (P&O) algorithm are producing power from PV array. The DC power from the PV array is boosted by using the DC-DC boost converter. Which is controlled by PI controller. This methodology of simulation has been carried out and verified through the MAT LAB/SIMULINK to achieve a mitigated Total Harmonic Distortion (THD).

Modeling of A Single Phase 7-Level Cascaded H-Bridge Multilevel Inverter

International Journal of Engineering & Technology

Recently, almost all industrial devices are mostly built on electronic devices which are precisely sensitive to harmonic. In order to meet the requirement from the industries demand aimed at a free-harmonics and high power rating source is remarkably increased in past few years. An inverter which a device or electric circuit that convert direct current to alternating current is one of the electronic devices that give concern to researchers for improvement of generating a neat power source. The inverter can be categorized into a single level and multilevel inverter. As compared to single level inverter, multilevel inverter offers minimum harmonic distortion and higher power output. This paper presents a model of multilevel inverter using 7-level Cascaded H-Bridge of multilevel DC-AC inverter to reduce total harmonic distortion with different sinusoidal pulse width modulation such as phase disposition and phase opposition disposition. Simulation output of single phase multilevel inver...

Analysis of various control schemes for minimal Total Harmonic Distortion in cascaded H-bridge multilevel inverter

Journal of Electrical Systems and Information Technology, 2016

Multilevel inverters are becoming more popular in the power conversion systems for high power and power quality demanding applications. The MATLAB based simulation on SIMULINK platform is presented for the Single Phase five level cascaded H-bridge Multilevel Inverter (CHB-MLI) topology with less number of switches and with different control schemes and Sinusoidal Pulse Width Modulation (SPWM) schemes. A detailed comparison of various control schemes is presented in this paper with reference to Total Harmonic Distortion (THD) in the output voltage and utilization factor of the power devices. It is observed that among all the control schemes, the THD is minimum in the Sinusoidal Pulse Width Modulation-Phase Disposition (SPWM-PD) scheme with variable carrier wave magnitude.

Simulation , Analysis and Implementation of 7 level Cascaded H Bridge MultiLevel Inverter

2018

This paper a contrivance of inverter of cascaded type is presented in which the number of switches needed is lowered compared to usual used inverters. In this paper, concept which discussed are THD and low dv/dt for multilevel converters . This topology is also work on high power quality and lower harmonic components. And also better work for electromagnetic consistence and low dv/dt as well as lower switching losses. This Theory also presented different voltage source in generating all voltage levels as positive or negative is verified by using the MATLAB/SIMULINK results of a 7,13 &19 -level 1-phase &3-phase inverter. This paper main focused on T.H.D, dv/dt losses, single phase and three phase 7 level, 13 level, 19 level inverter

Harmonic Reduction Using Multilevel Inverter Concepts

Solar energy sources are widely available, but in the form of DC source. It is connected in distribution system by means of converting DC/AC supply. It is achieved by means of inverter. To get efficient AC source we use multilevel inverter (MLI). The popularly used inverter is cascaded H-bridge MLI. As the step increases, the AC output nearly becomes same as sinusoidal. The purpose of the project is achieving nearly sinusoidal waveform, so that the grid interfacing is easily connected with 3 phase 4 wire distribution system. We can compare the THD values of symmetrical and Asymmetrical cascaded H bridges. This scheme is demonstrated with MATLAB/SIMULINK.

A comparative analysis of five level diode clamped and cascaded H-bridge multilevel inverter for harmonics reduction

2018

Z-source based multilevel inverters are the recent topologies as they have boosting ability and near sinusoidal output waveforms. This paper proposes different inverter topologies such as Z-source multilevel inverter and quasi Z-source multilevel inverter. This paper also deals with switched inductor and improved switched inductor topologies with quasi Z-network. The proposed switched inductor system reduces the voltage stresses caused by capacitors, power devices and diodes. In addition to multilevel inverter advantages, the proposed configuration employs Z-source inverter advantages. The Z-source inverter as compared to the traditional inverter is less costly, less complex, more efficient and more reliable. The performance of the proposed configurations is analysed by varying passive elements in impedance network and is simulated in MATLAB/SIMULINK. Phase disposition (PD) pulse width modulation (PWM) technique is applied on the proposed configurations and performance parameters are measured by the fast Fourier transform FFT analysis. The object of this paper is to develop an inverter which is used for variable speed drives with increase in output voltage by eliminating transformer and filter circuit. The performance is checked with standared parameter of the inverter.

HARMONIC ANALYSIS OF MULTILEVEL INVERTER

This paper present the different levels of cascaded H-bridge inverters and the minimization of total harmonic distortion by increasing levels. Selective Harmonic Elimination technique is used as a switching scheme. The analysis of three, five and seven level cascaded H-bridge inverter simulation work is done by using the MATLAB software and experimental results have been presented to validate the theory. The simulation results show the improvement of output voltage waveform and reduction of the THD by increasing the levels in inverter. .