Voltage Switching Scheme for Harmonic Reduction in Multilevel Inverters

2007 ◽  
Author(s):  
Arif Al-Judi ◽  
Ed Nowicki ◽  
Hussain Bierk
Keyword(s):  
Switching Scheme ◽  
Multilevel Inverters ◽  
Harmonic Reduction ◽  
Voltage Switching

Analysis and Comparison of Harmonic Reduction in Multilevel Inverters

2010 ◽  
Vol 4 (1) ◽  
pp. 51-57
Author(s):  
G. Mahesh Manivanna Kumar ◽  
◽  
S. Rama Reddy ◽  
Keyword(s):  
Multilevel Inverters ◽  
Harmonic Reduction

A Modulation Scheme for Floating Source Multilevel Inverter Topology with Increased Number of Output Levels

2016 ◽  
Vol 6 (5) ◽  
pp. 1985 ◽  
Author(s):  
Hussain M. Bassi
Keyword(s):  
Substantial Reduction ◽  
Multilevel Inverter ◽  
Modulation Scheme ◽  
Sinusoidal Wave ◽  
Switching Scheme ◽  
Multilevel Inverters ◽  
Modulation Technique ◽  
Multi Level ◽  
Inverter Topology ◽  
Switching Devices

<p>This paper presented and studied a new switching scheme for floating source multilevel inverters to produce more levels with the same number of switching devices. In the proposed scheme, the function of the dc sources, except the inner one, is to build up square wave or blocks that is close in the shape to the desired sinusoidal wave. The job of the inner switching devices is to increase the number of the levels to produce smother sinusoidal wave in the inverter output. This job can be done by adding or subtracting the value of the inner dc source to/from the blocks. The topology used in this paper is based on the conventional floating source multi-level inverter using two legs. This topology and modulation technique show substantial reduction in the total harmonics distortion when the modulation technique is the hybrid method. The performance of the proposed switching scheme in generating more levels has been evaluated by PSCAD/EMTDC simulation.</p>

Innovative Reactive Power Saving in Wind-driven Grid-connected Induction Generators Using a Delta-star Stator Winding Part I: Performance Analysis of the Delta-Star Generator and Test Results

2003 ◽  
Vol 27 (2) ◽  
pp. 107-120 ◽  
Author(s):  
N. Kumaresan ◽  
M. Subbiah
Keyword(s):  
Reactive Power ◽  
Induction Motors ◽  
Power Saving ◽  
Inrush Current ◽  
Stator Winding ◽  
Test Results ◽  
Switching Scheme ◽  
Induction Generators ◽  
Harmonic Reduction ◽  
Three Phase

An innovative delta-star three-phase winding, developed earlier for harmonic reduction in 3-phase induction motors, is applied for constant speed grid-connected induction generators. A method has been developed for the prediction of the performance of the generator with such an unconventional winding. It has been demonstrated that with a suitable switching arrangement, the proposed delta-star generator can result in increased real power delivered to the grid and reduced reactive power drawn from the grid, as compared to a fixed stator configuration. A suitable microcontroller-based switching-scheme has also been designed for changing the stator connection according to the wind speed. The facility for using the star mode of the generator while connecting it to the grid with much reduced inrush current is also illustrated.

scholarly journals A Modulation Scheme for Floating Source Multilevel Inverter Topology with Increased Number of Output Levels

2016 ◽  
Vol 6 (5) ◽  
pp. 1985
Author(s):  
Hussain M. Bassi
Keyword(s):  
Substantial Reduction ◽  
Multilevel Inverter ◽  
Modulation Scheme ◽  
Sinusoidal Wave ◽  
Switching Scheme ◽  
Multilevel Inverters ◽  
Modulation Technique ◽  
Multi Level ◽  
Inverter Topology ◽  
Switching Devices

<p>This paper presented and studied a new switching scheme for floating source multilevel inverters to produce more levels with the same number of switching devices. In the proposed scheme, the function of the dc sources, except the inner one, is to build up square wave or blocks that is close in the shape to the desired sinusoidal wave. The job of the inner switching devices is to increase the number of the levels to produce smother sinusoidal wave in the inverter output. This job can be done by adding or subtracting the value of the inner dc source to/from the blocks. The topology used in this paper is based on the conventional floating source multi-level inverter using two legs. This topology and modulation technique show substantial reduction in the total harmonics distortion when the modulation technique is the hybrid method. The performance of the proposed switching scheme in generating more levels has been evaluated by PSCAD/EMTDC simulation.</p>

scholarly journals Micro controller based asymmetrical multilevel inverter

2019 ◽  
Vol 8 (1) ◽  
pp. 18
Author(s):  
Arun V. ◽  
Prabaharan N.
Keyword(s):  
Real Time ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Total Harmonic Distortion ◽  
Switching Scheme ◽  
High Quality ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Embedded Controller

This paper presents the Asymmetrical multilevel inverter with 1:3 voltage propagation. Switching pulse for Asymmetrical multilevel inverter are generated using embedded controller in m-file using MATLAB. The Asymmetrical multilevel inverter with 1:3 voltage propagation can produce high quality output voltage with less number of switches and voltage sources compare to conventional multilevel inverters. Contrasting other switching schemes, the proposed Switching scheme significantly reduces the Total Harmonic Distortion (THD) and minimize switching losses and reduces the complexity. To evaluate the developed scheme, simulations are carried out through MATLAB and real time implementations are done through microcontroller ARM Cortex™-M0 Core. The simulation and hardware results are presented.

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