scholarly journals Design of a New Duty Cycle Modulation to Improve the Energy Quality of an Insulated Production System

2021 ◽  
Vol 23 (4) ◽  
pp. 311-319
Author(s):  
Clément Kengnou Donfack ◽  
Charles Hubert Kom ◽  
Jean Jacques Mandeng ◽  
Félix Paune
Keyword(s):  
Duty Cycle ◽  
Pulse Width Modulation ◽  
Renewable Energy Sources ◽  
Control Technique ◽  
Three Phase ◽  
New Strategy ◽  
The One ◽  
Sinusoidal Pulse Width Modulation ◽  
Three Phase Inverter

In this article, we propose a new strategy for controlling three-phase inverters of renewable energy sources, based on the Duty Cycle Modulatiom (DCM) control using the Park and Fortescue transformation (DCM-dq-dih). Our goals in setting and using this strategy are, on the one hand, to induce a lower harmonic rate as compared to the SPWM (Sinusoidal Pulse Width Modulation) strategy and on the other hand, this control technique enables the inverter to deliver balanced voltages, be it in the event of load unbalance. Our design is built on the basis of the known mode of DCM control of single-phase inverters. Thus, the control of our three-phase inverter is carried out by three DCM modules whose set-points come from the direct, reverse and homopolar strings reconstructed in a Park landmark. This new strategy was tested on the MATLAB Simulink environment for a load of 160 kW. The test results show a reduced Total Harmonic Distorsion (THD) of 2.7 times compared to the THD produced by the SPWM control strategy. In addition, regulation of the symmetrical components during load unbalance is ensured so that the inverter always delivers constant and balanced voltages.

scholarly journals Desarrollo y programación de señales de conmutación para inversor trifásico basadas en técnicas SPWM e implantadas en una FPGA

2019 ◽  
pp. 17-23
Author(s):  
Benjamín Chavarría-Domínguez ◽  
Fernando Chavarría-Domínguez ◽  
Isidro Jimenez-Silva ◽  
Luis Alvarez-Martinez
Keyword(s):  
Direct Current ◽  
Field Programmable Gate Array ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Alternating Current ◽  
Phase Inverter ◽  
Three Phase ◽  
Field Programmable ◽  
Sinusoidal Pulse Width Modulation ◽  
Three Phase Inverter

The inverters allow us to convert direct current into alternating current with a sine waveform. This work uses the Matlab-Simulink program to develop from a graphic and block environment a SPWM (Sinusoidal Pulse Width Modulation) modulation technique that allows generating the switching pulses of a three-phase inverter based on bridges H, a simulation of the pulses applied to the inverter is also performed to record the voltage at the output of the inverter. Finally, a programming method based on the Icestudio environment is shown to integrate and be able to physically generate the pulses from an FPGA (Field-programmable gate array). The value of this work lies in the detailed description of the procedures necessary to develop the programming of the SPWM modulation that generates the switching pulses and their integration into the FPGA.

scholarly journals Modified T-type topology of three-phase multi-level inverter for photovoltaic systems

2022 ◽  
Vol 12 (1) ◽  
pp. 262
Author(s):  
Abderrahmane Ouchatti ◽  
Redouane Majdoul ◽  
Ahmed Moutabir ◽  
Abderrahim Taouni ◽  
Abdelouahed Touati
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Phase Inverter ◽  
Three Phase ◽  
Control Scheme ◽  
Flying Capacitors ◽  
Multi Level ◽  
The One ◽  
Output Filter ◽  
Three Phase Inverter

In this article, a three-phase multilevel neutral-point-clamped inverter with a modified t-type structure of switches is proposed. A pulse width modulation (PWM) scheme of the proposed inverter is also developed. The proposed topology of the multilevel inverter has the advantage of being simple, on the one hand since it does contain only semiconductors in reduced number (corresponding to the number of required voltage levels), and no other components such as switching or flying capacitors, and on the other hand, the control scheme is much simpler and more suitable for variable frequency and voltage control. The performances of this inverter are analyzed through simulations carried out in the MATLAB/Simulink environment on a three-phase inverter with 9 levels. In all simulations, the proposed topology is connected with R-load or RL-load without any output filter.

scholarly journals Development and Modelling of Three Phase Inverter for Harmonic Improvement using Sinusoidal Pulse Width Modulation (SPWM) Control Technique

2019 ◽  
Vol 8 (4) ◽  
pp. 1897-1902
Keyword(s):  
Internal Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Control Technique ◽  
Voltage Source ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Three Phase ◽  
Sinusoidal Pulse Width Modulation

This paper describes the design of a 400 V, three-phase voltage source inverter system using Sinusoidal Pulse Width Modulation (SPWM) control technique. Pulse Width Modulation (PWM) is an internal control technique for inverters. The Sinusoidal Pulse Width Modulation (SPWM) technique is the type of PWM used in this work. The aim is to reduce the harmonic produced by the inverter. Current standards require that total harmonic distortion (THD) be minimal. A three-phase SPWM signal is implemented in order to create an output voltage which is closer to a true sine wave and reduce harmonics. The development and model were implemented using MATLAB Simulink soft-ware and hardware parameters. The addition of a low pass filter circuit aids the achievement of smoother sine waveforms and a reduced THD value of 0.17%. The proposed concept has been validated through experimentally on a laboratory prototype by using DSP TMS320F28335 real-time digital control. The experimental outcomes emphasize the authenticity of the suggested technique in reducing harmonics, which can be promising to power quality improvement.

scholarly journals Diminution of Harmonics in a Cascaded Multilevel Inverter Using Third Harmonics Injection PWM Technique

2019 ◽  
Vol 8 (3) ◽  
pp. 7493-7497
Keyword(s):  
Power Distribution ◽  
Pulse Width Modulation ◽  
Semiconductor Device ◽  
Multilevel Inverter ◽  
Control Technique ◽  
Circuit Performance ◽  
Ac Motor ◽  
Three Phase ◽  
Cascaded Multilevel Inverter ◽  
Three Phase Inverter

This paper is deals the Asymmetric cascaded three phase hybrid multilevel inverter for ac motor application. This proposed hybrid three phase inverter is used to diminishes the no of semiconductor device requirement and enhances the power distribution of each H-bridge cell. The Third Harmonics Injection (THIPWM) with sinusoidal pulse width modulation (SPWM) are used to regulate the output voltage of the inverter, further incorporate the Phase disposition (PD) and Alternative Phase Opposition disposition PWM (APOD) techniques. This control technique is applied to minimize the current harmonic and get the better recital of the system. The circuit is simulated using Mat-lab Simu-link. The circuit performance such as THD, line voltage and phase voltage are compared using two hybrid modulation techniques and verified with simulation results.

Advance Technology in Application of Four Leg Inverters to UPQC

2016 ◽  
Vol 7 (4) ◽  
pp. 1153
Author(s):  
K. Venkata Rami Reddy ◽  
T. Gowri Manohar ◽  
B. Chandra Sekhar
Keyword(s):  
Power Quality ◽  
High Voltage ◽  
Pulse Width Modulation ◽  
Control Technique ◽  
Unified Power Quality Conditioner ◽  
Artifical Neural Networks ◽  
Three Phase ◽  
Power Quality Conditioner ◽  
Ac Transmission ◽  
Sinusoidal Pulse Width Modulation

This article presents a novel application of four leg inverter with conventional Sinusoidal Pulse Width Modulation (SPWM) Scheme to Unified Power Quality Conditioner (UPQC). The Power Quality problem became burning issues since the starting of high voltage AC transmission system. Hence, in this article it has been discussed to mitigate the PQ issues in high voltage AC systems through a three phase Unified Power Quality Conditioner (UPQC) under various conditions, such as harmonic mitigation scheme, non linear loads, sag and swell conditions as well. Also, it proposes to control harmoincs with various artificial intelligent techniques. Thus application of these control technique such as Artifical Neural Networks, Fuzzy Logic makes the system performance in par with the standards and also compared with existing system. The simulation results based on MATLAB/SIMULINK<sup>TM </sup>are discussed in detail to support the concept developed in the paper.

Performance Improvement of SVPWM-Based Three-Phase Grid-Connected Inverters

2013 ◽  
Vol 732-733 ◽  
pp. 1261-1264
Author(s):  
Zhi Lei Yao ◽  
Lan Xiao ◽  
Jing Xu
Keyword(s):  
Dynamic Response ◽  
Control Strategy ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Grid Current ◽  
Current Controller ◽  
Three Phase ◽  
Reference Grid ◽  
Grid Connected Inverter

An improved control strategy for three-phase grid-connected inverters with space vector pulse width modulation (SVPWM) is proposed. When the grid current contains harmonics, the d-and q-axes grid currents is interacted in the traditional control method, and the waveform quality of the grid current is poor. As the reference output voltage cannot directly reflect the change of the reference grid current with the traditional control strategy, the dynamic response of the grid-connected inverter is slow. In order to solve the aforementioned problems, the d-and q-axes grid currents in the decoupled components of the grid current controller are substituted by the d-and q-axes reference grid currents, respectively. The operating principles of the traditional and proposed control methods are illustrated. Experimental results show that the grid-connected inverter with the improved control strategy has high waveform quality of the grid current and fast dynamic response.

scholarly journals Three Phase 9-Level Hybridised Cascaded Multi-Level Inverter for Use in Smart Grid

2019 ◽  
Vol 8 (10) ◽  
pp. 4612-4618
Keyword(s):  
Smart Grid ◽  
Pulse Width Modulation ◽  
Modulation Scheme ◽  
Fast Fourier Transform Analysis ◽  
Three Phase ◽  
Multi Level ◽  
Grid Operation ◽  
Inverter Topology ◽  
Three Phase Inverter ◽  
Smart Grid Technology

Smart grid technology can be best utilized by having proper grid supporting equipment. This paper demonstrates the use of a three-phase, 9-level, hybridised cascaded multi-level inverter topology in a smart grid. A pulse width modulation scheme with phase disposition is employed in this inverter to control the firing signals to operate this circuit. These firing signals can be monitored and controlled for optimal usage in smart grid operation. Operational principles with switching equations are described in detail. Crucial voltage identification has been performed by analyzing the THD in output during source shortages by performing Fast Fourier transform analysis. Least THD of 15.82% is attained in the output voltage waveform of the proposed three phase inverter topology.

scholarly journals A Genetic-Algorithm-Based DC Current Minimization Scheme for Transformless Grid-Connected Photovoltaic Inverters

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 746 ◽  
Author(s):  
Lei Song ◽  
Lijun Huang ◽  
Bo Long ◽  
Fusheng Li
Keyword(s):  
Genetic Algorithm ◽  
Back Propagation ◽  
The Novel ◽  
Proof Of Concept ◽  
Three Phase ◽  
Suppression Process ◽  
Dc Current ◽  
Three Phase Inverter ◽  
Minimization Scheme

Transformerless grid-connected inverters are of great industrial value in photovoltaic power generation. However, the direct current (DC) induced into the inverter’s output degrades the power quality of the grid. Recently, a back-propagation neural work proportional–integral–derivative (BP-PID) scheme has proven helpful in solving this problem. However, this scheme can be improved by reducing the suppressing time and overshoot. A genetic algorithm (GA)-based DC current minimization scheme, namely the genetic-algorithm-based BP-PID (GA-BP-PID) scheme, was established in this study. In this scheme, GA was used off-line to optimize the initial weights within the BP neural network. Subsequently, the optimal weight was applied to the online DC current suppression process. Compared with the BP-PID scheme, the proposed scheme can reduce the suppressing time by 59% and restrain the overshoot. A prototype of the proposed scheme was implemented and tested on experimental hardware as a proof of concept. The results of the scheme were verified using a three-phase inverter experiment. The novel GA-PB-PID scheme proposed in this study was proven efficient in reducing the suppressing time and overshoot.

scholarly journals Influence of PWM Methods on Semiconductor Losses and Thermal Cycling of 15-kVA Three-Phase SiC Inverter for Aircraft Applications

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 620 ◽  
Author(s):  
Bernardo Cougo ◽  
Lenin Morais ◽  
Gilles Segond ◽  
Raphael Riva ◽  
Hoan Tran Duc
Keyword(s):  
Thermal Cycling ◽  
Thermal Stresses ◽  
Pulse Width Modulation ◽  
Junction Temperature ◽  
Phase Inverter ◽  
Instantaneous Power ◽  
Power Modules ◽  
Temperature Swing ◽  
Three Phase ◽  
Three Phase Inverter

This paper presents the influence of different pulse width modulation (PWM) methods on losses and thermal stresses in SiC power modules used in a three-phase inverter. The variation of PWM methods directly impacts instantaneous losses on these semiconductors, consequently resulting in junction temperature swing at the fundamental frequency of the converter’s output current. This thermal cycling can significantly reduce the lifetime of these components. In order to determine semiconductor losses, one needs to characterize SiC devices to calculate the instantaneous power. The characterization methodology of the devices, the calculation of instantaneous power and temperature of SiC dies, and the influence of the different PWM methods are presented. A 15-kVA inverter is built in order to obtain experimental results to confirm the characterization and loss calculation, and we show the best PWM methods to increase efficiency and reliability of the three-phase inverter for specific aircraft applications.

Sign in / Sign up

Export Citation Format

Share Document