Comparison of Flying Capacitor Fifteen Level Inverter and Thirty Three Level Inverter PWM Control Strategies

2017 ◽  
Vol 6 (2) ◽  
pp. 368
Author(s):  
Farouk Hadj Benali ◽  
Fouad Azzouz
Keyword(s):  
Root Mean Square ◽  
Output Voltage ◽  
Control Strategies ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Mean Square ◽  
Pwm Control ◽  
Simulation Results ◽  
Multicarrier Pwm ◽  
Better Than

<p>In the paper two PWM control strategies of multilevel flying capacitor inverter is proposed. The study starts with a presentation of the Flying capacitor inverter and the two PWM control strategies (SPWM and Suboptimal PWM). Than a section which presents a brief recall of the triangular multicarrier PWM and the sinusoidal multicarrier PWM. A comparison between the two PWM control strategies based on the simulation results is made. The subjects of comparison are the root mean square rms of the output voltage and the total harmonic distortion THD. The obtained results have proved that the Suboptimal PWM is better than the SPWM. Simulations are carried out by PSIM program.</p>

scholarly journals Reconfiguration of a Multilevel Inverter with Trapezoidal Pulse Width Modulation

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2148 ◽  
Author(s):  
Nataraj Prabaharan ◽  
V. Arun ◽  
Padmanaban Sanjeevikumar ◽  
Lucian Mihet-Popa ◽  
Frede Blaabjerg
Keyword(s):  
Root Mean Square ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Mean Square ◽  
Distortion Factor ◽  
Field Programmable ◽  
Trapezoidal Pulse

This paper presents different multi-carrier unipolar trapezoidal pulse width modulation strategies for a reduced switch asymmetrical multilevel inverter. The different strategies are phase disposition, alternative phase opposition and disposition, and carrier overlapping and variable frequency that involve triangular waves as carriers with a unipolar trapezoidal wave as a reference. The reduced switch, asymmetrical multilevel inverter operation was examined for generating the seven-level output voltage using Matlab/Simulink 2009b and the results were verified with a real-time laboratory-based experimental setup using a field-programmable gate array. Different parameter analyses, such as total harmonic distortion, fundamental root mean square voltage, and distortion factor, were analyzed with different modulation indices to investigate the performance of the selected topology. Unipolar trapezoidal pulse width modulation provides a higher root mean square voltage value.

scholarly journals Control of Cascaded H-Bridge Multilevel Inverter Based on Optimum Regulation of Switching Angles, and the FPGA Implementation

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Hatef Firouzkouhi
Keyword(s):  
Output Voltage ◽  
Harmonic Distortion ◽  
Fpga Implementation ◽  
Multilevel Inverter ◽  
Total Harmonic Distortion ◽  
Switching Pattern ◽  
Multi Level ◽  
Simulation Results ◽  
Polynomial Term

A new concept in control of cascaded H-Bridge multi-level inverters is proposed in this paper. According to this concept, switching angles are considered to be independent from the fundamental voltage. A polynomial term is presented to show the relation between switching angles and DC voltages. Based on this concept, Total Harmonic Distortion (THD) calculations are updated and proved to be independent from the fundamental voltage. Thus, once calculated for minimum THD, the switching pattern can be used for any required level of output voltage. To examine the effectiveness of the proposed method, it is applied in control of an eleven level inverter. The simulation results are demonstrated and verified through experiments with a setup controlled by Xilinx SPARTAN3 family FPGA (XC3S400-PQG208).

scholarly journals A Multicarrier PWM Technique for Five Level Inverter Connected to the Grid

2018 ◽  
Vol 9 (4) ◽  
pp. 1774
Author(s):  
M. Khanfara ◽  
R. El Bachtiri ◽  
M. Boussetta ◽  
K. El Hammoumi
Keyword(s):  
Spectral Analysis ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Passive Filter ◽  
Renewable Power ◽  
Three Phase ◽  
Simulation Results ◽  
Multicarrier Pwm

In this paper, a three-phase multilevel cascaded H-bridge inverter is developed for injecting renewable power energy into the grid through a filter. The main contribution of this work is to reduce the total harmonic distortion (THD) by using a passive filter and to enhance the output voltages by adopting a multicarrier pulse width modulation (MCPWM). The simulation results affirm a good performance of the proposed multicarrier PWM control using a three-phase five-level inverter. The proposed inverter is tested as well as the THD and the spectral analysis of the output voltage are calculated using Simulink/Matlab software.

scholarly journals Harmonics reduction of a five-level inverter by unbalanced carriers and over-modulation techniques

2018 ◽  
Vol 7 (3) ◽  
pp. 1059
Author(s):  
Mustafa Fawzi Mohammed ◽  
Ali Husain Ahmad ◽  
AbdulRahim Thiab Humod
Keyword(s):  
Fundamental Frequency ◽  
Output Voltage ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Modulation Method ◽  
Labview Software ◽  
Design And Implementation ◽  
Modulation Techniques ◽  
Multi Level

The most concerns in the inverter's design are about, how to make the output voltage of the inverter sinusoidal at the desired fundamental frequency with low total harmonic distortion (THD). This paper presents a design and implementation of single-phase five-level inverter which is powered by single dc source and based on T-type multi-level inverters construction. The proposed inverter is built mainly by six IGBTs and two diodes. The used modulation technique is based on using two triangular carriers at 2000 Hz frequency and shifted by phase opposition disposition (POD) method. The carriers are made slightly unbalanced with their amplitudes. The over-modulation method is also introduced in the design to get the lowest possible THD effect without using filters. The inverter is simulated by MATLAB SIMULINK, implemented practically, and tested with the help of LabVIEW software.  

Application of a novel linearization method to compare the on–off control strategies modeled by piecewise linear systems

2020 ◽  
Vol 26 (23-24) ◽  
pp. 2125-2135
Author(s):  
Tudor Sireteanu ◽  
Ovidiu Solomon ◽  
Ana-Maria Mitu ◽  
Marius Giuclea
Keyword(s):  
Linear Systems ◽  
Root Mean Square ◽  
Hybrid Control ◽  
Control Strategies ◽  
Piecewise Linear ◽  
Practical Interest ◽  
Dynamic Contact ◽  
Linearization Method ◽  
Mean Square ◽  
Piecewise Linear Systems

In this study, a novel approach for linearization of piecewise linear systems is applied to approximate the root mean square output of a quarter car model with semiactive control. The on–off control strategies, balance logic, skyhook, groundhook, and hybrid are modeled by piecewise linear systems with variable friction. By the proposed method, one can attach, for each output of practical interest, a linear system with the same transmissibility factor. The obtained transmissibility factors are used to approximate the root mean square output of considered semiactive systems using the power spectral density input–output relationships for constant parameter linear systems with stationary random inputs. The method is applied for optimization of hybrid control strategy with respect to a performance index defined in terms of sprung mass acceleration, suspension travel, and dynamic contact force.

Comparison between the Nominal Loss in 3%SiFe and Amorphous Transformer Core Materials

2012 ◽  
Vol 626 ◽  
pp. 490-494
Author(s):  
Dina Maizana ◽  
Shuhaimi Zakaria Abdullah
Keyword(s):  
Flux Density ◽  
Amorphous Material ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Core Material ◽  
Test Frame ◽  
Transformer Core ◽  
Flux Leakage ◽  
Better Than ◽  
Core Materials

An investigation of nominal loss in 3%SiFe and amorphous of the transformer core materials will evaluate in this paper. The investigation involves the variation of power loss, flux leakage, and total harmonic distortion. The nominal loss has been measured using Epstein test frame with three layers of lamination. The loss in the amorphous transformer core material is 57.46% better than the transformer core with 3% SiFe material at flux density of 1.2T, 50 Hz. The flux leakage at corner in the 3% SiFe transformer core material is the lowest than the two of transformer core material, over the whole flux density range. Total harmonic distortion flux is the largest in the amorphous of transformer core materials and the smallest in the 3% SiFe of transformer core material. Using the amorphous material in transformer core is more efficient than the two of transformer core materials.

Comparison of Switching Angle Arrangement Techniques in Single-Phase Boost Multilevel Inverter for Low-THD Operation

2015 ◽  
Vol 793 ◽  
pp. 167-171
Author(s):  
Mohd Aizuddin Yusof ◽  
Yee Chyan Tan ◽  
M. Othman ◽  
S.S. Lee ◽  
M.A. Roslan ◽  
...  
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Solar Photovoltaic ◽  
Voltage Waveform ◽  
Voltage Level ◽  
Software Simulation ◽  
Multilevel Inverters ◽  
Simulation Results

Multilevel inverters are one of the preferred inverter choices for solar photovoltaic (PV) applications. While these inverters are capable of producing AC staircase output voltage waveform, the total harmonic distortion (THD) of the output voltage waveform can become worse if the switching angle of each voltage level is not carefully chosen. In this paper, four switching angle arrangement techniques are presented and the switching angles generated by these techniques are applied to a new single-phase boost multilevel (SPBM) inverter. The performance of 3-, 5-, 7-, 9-and 11-level SPBM inverter having four different sets of switching angles derived using the aforementioned techniques have been evaluated and compared using PSIM software. Simulation results show that one of the techniques is able to produce an output voltage waveform with the lowest THD, whilst the other generates an output voltage waveform with the highest fundamental voltage component.

scholarly journals Pulse Density Modulation Based Series Resonant Inverter Fed Induction Heater System

2018 ◽  
Vol 9 (2) ◽  
pp. 690
Author(s):  
S. Jaanaa Rubavathy ◽  
P. Murugesan
Keyword(s):  
Induction Heating ◽  
Output Voltage ◽  
Control Strategies ◽  
Resonant Inverter ◽  
Pulse Density ◽  
Series Resonant ◽  
Density Modulation ◽  
Simulation Results ◽  
Pulse Density Modulation ◽  
Series Resonant Inverter

This paper deals with implementation of a multi-output Series Resonant Inverter(SRI) for induction heating applications, which uses pulse density modulation(PDM) control for full bridge Series resonant inverters for output voltage and power control. It ensures better efficiency performances than conventional control strategies. The proposed converter can be considered as a two output extension of a full bridge inverter. This full bridge inverter can control the two outputs, simultaneously and independently, up to their rated powers, which reduces the usage of number of components as compared with conventional method. It also ensures higher utilization of switches used for its operation. A two output full bridge series resonant inverter is simulated and implemented. The Experimental results are compared with the simulation results.

scholarly journals Mitigation of load side harmonic distortion in standalone photovoltaic based microgrid

2021 ◽  
Vol 304 ◽  
pp. 01010
Author(s):  
Adel Aljwary ◽  
Ziyodulla Yusupov ◽  
Olimjon Toirov ◽  
Rustam Shokirov
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Energy Resources ◽  
Power Electronic ◽  
Solar Pv ◽  
Distributed Energy ◽  
Pv System ◽  
Simulation Results

Photovoltaic (PV) system as one part of distributed energy resources is becoming an alternative for low and medium distribution network of microgrid. By the reason of a wide implementation of power electronic and non-linear loads, harmonics distortion is one of the main problems for the power systems. There are several filter types to mitigate the harmonics. The passive filter is distinguished by its simplicity and economical options from another filters. In this paper, the passive single tuned filter (STF) is used to minimize harmonics distortion in standalone PV based microgrid. A solar PV array is modelled as an ideal single diode model (ISDM) and used to supply electrical power to an AC load. The simulation results are executed on MATLAB/Simulink show that STF is effective in mitigating the voltage total harmonic distortion (VTHD) and the current total harmonic distortion (ITHD) with enhancing the output power quality.

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