An Improved Multicarrier PWM (MCPWM) Technique with a New Harmonic Mitigation Strategy for Cascaded H-Bridge Multilevel Inverter Applications

2021 ◽  
pp. 1-1
Author(s):  
Rishiraj Sarker ◽  
Asim Datta ◽  
Sudipta Debnath
Keyword(s):  
Mitigation Strategy ◽  
Multilevel Inverter ◽  
Harmonic Mitigation ◽  
Multicarrier Pwm

Switching Modulation Strategies for Multilevel Inverter

2021 ◽  
Vol 20 (2) ◽  
pp. 1-7
Author(s):  
Jahanzeb - ◽  
Shahrin Md. Ayob ◽  
Saifullah Khan ◽  
Mohd Zaki Daud ◽  
Razman Ayop
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Level Control ◽  
Multilevel Inverters ◽  
Power Switches ◽  
Modulation Schemes ◽  
Multicarrier Pwm

There is always a need to create efficient and optimized converters to deliver the best possible results to achieve a better THD profile in the waveform output. One way is by controlling the switching of the power switches of the converters using appropriate modulation schemes. While numerous works have been done in proposing new switching modulation strategies for multilevel inverters, this work will compare multicarrier PWM and near-to-level control (NLC) modulation schemes. In this paper, multicarrier PWM variants, namely, PD-PWM, POD-PWM, and APOD-PWM, are designed and simulated. Their voltage THD and spectrum performance are discussed when applied to single-phase 7, 9, and 11-level cascaded multilevel inverters. Then NLC modulation will be designed and applied to similar multilevel inverter circuits. It will be shown that the NLC exhibits some superior performances compared to PWM-based but with several drawbacks that can be optimized. 

scholarly journals Feedforward Harmonic Mitigation Strategy for Single-Phase Voltage Source Converter

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Qing Zhong ◽  
Junjie Feng ◽  
Gang Wang ◽  
Haifeng Li
Keyword(s):  
Single Phase ◽  
Control Strategies ◽  
Mitigation Strategy ◽  
Voltage Source ◽  
Effective Control ◽  
Voltage Source Converter ◽  
Phase Voltage ◽  
Analysis Model ◽  
Harmonic Pollution ◽  
Harmonic Mitigation

With the development of distributed generations (DGs), single-phase voltage source converter (SPVSC) has been widely used, but it brings about the problem of harmonic pollution to power grid. Hence, it is significant to explore the mechanism of harmonic injection from SPVSC and propose effective control strategies to mitigate the harmonic pollution. In this paper, a harmonic analysis model of SPVSC based on dynamic phasor (DP) has been established. With the model, the harmonics interaction between the ac side and the dc side can be analyzed with the consideration of the control strategies, which reveals the generation mechanism of the harmonics in SPVSC. Based on the mechanism, a feedforward harmonic mitigation strategy has been presented. The principle of the strategy is to add low-order harmonic signal to the PWM modulation signals to reduce the harmonic current on the ac side. The harmonic mitigation strategy not only has clear physical meaning and fast calculation, but also is robust for the uncertainty of parameters. Finally, the simulation and experiment results demonstrate the correctness of the model and the effectiveness of the harmonic mitigation strategy.

scholarly journals Multicarrier PWM Based Control of Modular Multilevel Inverter with Grid Connected Solar PV System

2021 ◽  
Vol 7 (05) ◽  
pp. 72-80
Author(s):  
Saminathan S & Dr. Ranjithkumar K
Keyword(s):  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Pv ◽  
Pv System ◽  
Voltage Balancing ◽  
Multilevel Inverters ◽  
Solar Pv System ◽  
And Performance ◽  
Inverter Topology ◽  
Multicarrier Pwm

In this work, a new modular multilevel inverter topology is introduced for a single phase grid connected Photovoltaic system. This multilevel inverter use less number of switches to generate seven levels compared to other conventional multilevel inverters. This requires only one isolated dc source to operate. So it is suitable for renewable energy application. This inverter is designed by submodule configuration; each sub module contains two switches and one DC link capacitor. The sub modules will be added to the inverter depending on number of levels. The voltage balancing of DC link capacitor is carried out by Y matrix PWM technique. Because of Y matrix PWM technique, the inverter gets a self capacitor voltage balancing ability. So there is no need of external devices required for balancing the voltage of capacitor. A PLL for grid integration and LCL filter are designed and integrated with this inverter. The simulation of proposed system is carried out by MATLAB/SIMULINK and performance of THD is monitored as per standards

MULTILEVEL INVERTER WITH VARIABLE AMPLITUDE MULTICARRIER PWM TECHNIQUES

2014 ◽  
Vol 2 (3) ◽  
pp. 6
Author(s):  
PANDIARAJAN SURESH P. ◽  
NATARAJAN. S.P. ◽  
C. R. Balamurugan ◽  
◽  
◽  
...  
Keyword(s):  
Multilevel Inverter ◽  
Variable Amplitude ◽  
Multicarrier Pwm

Investigation of Diode Clamped Multilevel Inverter Using Multicarrier PWM Techniques

2021 ◽  
Author(s):  
R Bharathsrinivas ◽  
Sachin Angadi ◽  
Gurubasu Hombal ◽  
A B Raju
Keyword(s):  
Multilevel Inverter ◽  
Multicarrier Pwm
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