scholarly journals A modified cascaded h-bridge multilevel inverter based on particle swarm optimisation (PSO) technique

2019 ◽  
Vol 16 (1) ◽  
pp. 41
Author(s):  
Mohammed Rasheed ◽  
Rosli Omar ◽  
Marizan Sulaiman ◽  
Wahidah Abd Halim
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Linear Equations ◽  
Harmonic Distortion ◽  
Particle Swarm ◽  
Multilevel Inverter ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Non Linear Equations

<span>In this paper, modified multilevel inverter, via addition of an auxiliary bidirectional switch, based on Newton Raphson (NR) and Particle Swarm Optimization (PSO) techniques is presented. The NR and PSO techniques were employed for selective harmonics elimination (SHE) solution in a modified Cascaded H Bridge Multilevel inverter (CHB-MLI). The Selective Harmonic Elimination Pulse-Width Modulation (SHE-PWM) is a powerful technique for harmonic minimization in multilevel inverter. The NR and PSO techniques were used to determine the switching angles by solving the non-linear equations of the output voltage waveform of the modified CHB-MLI in order to control the fundamental component and eliminate some low order harmonics. The proposed NR and PSO techniques are capable to minimize the Total Harmonic Distortion (THD) of the output voltage of the modified inverter within allowable limits. This paper aims to modeling and simulation by MATLAB of the modified topology of the CHB-MLI for a single-phase prototype for 13-levels. The inverter offers less THD and greater efficiency using PSO control algorithm compared with the NR algorithm. <br https://server9.kproxy.com/servlet/redirect.srv/sruj/snbzofspy/skvyzff/p1/> The performance of the proposed controllers based on NR and PSO techniques is verified through simulation.</span>

scholarly journals Particle swarm optimisation (PSO) algorithm with reduced numberof switches in multilevel inverter (MLI)

2019 ◽  
Vol 14 (3) ◽  
pp. 1114 ◽  
Author(s):  
Mohammed Rasheed ◽  
Rosli Omar ◽  
Marizan Sulaiman ◽  
Wahidah Abd Halim
Keyword(s):  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Particle Swarm ◽  
Pso Algorithm ◽  
Multilevel Inverter ◽  
Harmonic Elimination ◽  
Paper Cover ◽  
Three Phase ◽  
Selective Harmonic Elimination ◽  
Cover Design

<p>In this work, a three-phase of multilevel inverter (MLI) with reduced number of switches components based on Newton Raphson (NR) and Particle Swarm Optimization (PSO) techniques were presented. The Selective Harmonic Elimination Pulse-Width Modulation (SHE-PWM) is a powerful technique for harmonic minimization in multilevel inverter within allowable limits. NR and PSO techniques were used to determine the switching angles by solving the non-linear equation's analysis of the output voltage waveform of the modified CHB-MLI in order to control the fundamental component. A comparison has been made between NR and PSO techniques related to optimization in order minimize harmonic distortion. The main aims of this paper cover design, modeling, construction the modified topology of the CHB-MLI for a three phase five levels inverter. The controllers based on NR and PSO were applied to the modified multilevel inverter. The inverter offers much less THD using PSO scheme compared with the NR scheme. The performance of the proposed controllers based on NR and PSO techniques done by using MATLAB/Simulink of results are compared.</p>

scholarly journals A New Method of Selective Harmonic Elimination PWM for H-Bridge Cascaded Multilevel Inverter

2019 ◽  
Vol 9 (1) ◽  
pp. 6168-6175
Keyword(s):  
Degrees Of Freedom ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Voltage Range ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Cascaded Multilevel Inverter ◽  
Operating Points

The quality of power of the cascaded H-bridge multilevel inverter is affected due to harmonics. In this paper, a Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM) method including controllable DC link voltage is introduced for the multilevel inverter. Novel mathematical modeling of SHE-PWM is established concerning the DC link voltage. Compared to ordinary selective harmonic elimination, the proposed method has an increased number of degrees of freedom because of its variable DC link voltage. On the other hand, the selective harmonic elimination utilizes constant DC link voltage. In the proposed scheme, the nonlinear equations are solved only once in the entire voltage range. As a result, the computational burden will decrease. Also, the Total Harmonic Distortion (THD) of the output voltage remains constant for various values of the operating points. The simulation is performed using Matlab Simulink and the comparison is performed with the conventional PWM method. It is intended that the proposed SHE-PWM based cascaded H-bridge multilevel inverter provides better performance in terms of lower-order harmonics and less THD compares to conventional PWM method.

Selective harmonic elimination pulse width modulation for three-phase cascaded multilevel inverter

2021 ◽  
Author(s):  
Baharuddin Ismail ◽  
Muzamir Isa ◽  
M. Z. Aikhsan ◽  
M. N. K. H. Rohani ◽  
C. L. Wooi ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Harmonic Elimination ◽  
Three Phase ◽  
Selective Harmonic Elimination ◽  
Cascaded Multilevel Inverter

FPGA Based Selective Harmonic Elimination Technique for Multilevel Inverter

2018 ◽  
Vol 9 (1) ◽  
pp. 166 ◽  
Author(s):  
T. Porselvi ◽  
K. Deepa ◽  
R. Muthu
Keyword(s):  
Power Generation ◽  
Lower Order ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
New Technique ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Medium Range ◽  
Field Programmable ◽  
A New Technique

Harmonic elimination at the fundamental frequency is very much appropriate for high and medium range of power generation and applications. This paper considers a new technique for selective harmonic elimination (SHE), in which the total harmonic distortion (THD) is minimized when compared with that of the conventional one. With this technique, the harmonics at lower order are eliminated, which are more predominant than the higher ones.Cascaded H-Bridge inverter fed by a single DC is considered which is simulated with the switching angles generated by both the conventional method of SHE and the new method of SHE. The simulated results of the load voltage and the waveforms of the harmonic analysis are shown. The THD values are compared for the two techniques.  The experimental results are also shown for the new technique. The switching angles are generated with the help of field programmable gated array (FPGA) in the hardware. The value of experimental THD of voltage is compared with that of simulated THD and the comparison prove that the results are satisfactory.

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 Solar Photovoltaic System-Based Reduced Switch Multilevel Inverter for Improved Power Quality

2022 ◽  
Vol 4 (1) ◽  
pp. 1-13
Author(s):  
Madhu Andela ◽  
Ahmmadhussain Shaik ◽  
Saicharan Beemagoni ◽  
Vishal Kurimilla ◽  
Rajagopal Veramalla ◽  
...  
Keyword(s):  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Switching Losses ◽  
Minimum Number ◽  
Multi Level ◽  
Solar Photovoltaic System

This paper deals with a reduced switch multi-level inverter for the solar photovoltaic system-based 127-level multi-level inverter. The proposed technique uses the minimum number of switches to achieve the maximum steps in staircase AC output voltage when compared to the flying capacitor multi-level inverter, cascaded type multilevel inverter and diode clamped multi-level inverter. The use of a minimum number of switches decreases the cost of the system. To eliminate the switching losses, in this topology a square wave switch is used instead of pulse width modulation. Thereby the total harmonic distortion (THD) and harmonics have been reduced in the pulsating AC output voltage waveform. The performance of 127-level MLI is compared with 15 level, 31-level and 63-level multilevel inverters. The outcomes of the solar photovoltaic system-based 127-level multi-level inverter have been simulated in a MATLAB R2009b environment.

scholarly journals Performance evaluation and comparison of diode clamped multilevel inverter and hybrid inverter based on PD and APOD modulation techniques

2019 ◽  
Vol 8 (2) ◽  
pp. 143
Author(s):  
N. Susheela ◽  
P. Satish Kumar
Keyword(s):  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Number Of Components ◽  
Modulation Techniques ◽  
Modulation Methods

<p>The popularity of multilevel inverters have increasing over the years in various applications without use of a transformer and has many benefits. This work presents the performance and comparative analysis of single phase diode clamped multilevel inverter and a hybrid inverter with reduced number of components. As there are some drawbacks of diode clamped multilevel inverter such as requiring higher number of components, PWM control method is complex and capacitor voltage balancing problem, an implementation of hybrid inverter that requires fewer components and less carrier signals when compared to conventional multilevel inverters is discussed. The performance of single phase diode clamped multilevel inverter and hybrid multilevel inverter for seven, nine and eleven levels is performed using phase disposition, alternate phase opposition disposition sinusoidal pulse width modulation techniques. Both the multilevel inverter are implemented for the above mentioned multicarrier based Pulse Width Modulation methods for R and R-L loads.  The total harmonic distortion is evaluated at various modulation indices. The analysis of the multilevel inverters is done by simulation in matlab / simulink environment.</p>

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