scholarly journals Performance of switched mode arbitrary excitation using Harmonic Reduction Pulse Width Modulation (HRPWM) in array imaging applications

2016 ◽  
Author(s):  
D. M. J. Cowell ◽  
T. Carpenter ◽  
P. Smith ◽  
C. Adams ◽  
S. Harput ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Reduction ◽  
Array Imaging

scholarly journals Three Level Inverter Controlled UPFC for Harmonic Reduction using Space Vector Pulse Width Modulation Technique

2020 ◽  
Vol 9 (5) ◽  
pp. 734-738
Keyword(s):  
Pulse Width ◽  
Power Flow ◽  
Pulse Width Modulation ◽  
Unified Power Flow Controller ◽  
Power Transfer ◽  
Harmonic Reduction ◽  
Switching Pattern ◽  
Transfer Capability ◽  
Power Quality Improvement ◽  
Power Flow Controller

Unified Power Flow Controller (UPFC) is one of the most important device in FACTS family, this device in this work is used for power quality improvement. In this paper three level inverter is proposed for UPFC for the reduction of harmonics and for the enhancement of power transfer capability. SVPWM technique decides switching pattern of three level inverter. Therefore, in this paper this method is applied for controlling the three level inverter output. The proposed method is applied on four bus system and results are compared with UPFC without three level inverter. Results demonstrated that the proposed method effectively decreasing the harmonics and increasing the power transfer capability.

scholarly journals Modified PWM Technique for Harmonic Reduction

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Alireza Hoseinpour ◽  
Reza Ghazi
Keyword(s):  
Control Strategy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Reference Signal ◽  
Space Vector Modulation ◽  
Shunt Active Filter ◽  
Harmonic Reduction ◽  
Reference Signals ◽  
Simulation Results ◽  
Vector Modulation

This paper presents a Shunt Active Filter (SAF) based on the Variable Index Pulse Width Modulation approach. In the proposed method of Pulse Width Modulation (PWM), the triangular wave is derived by integration of the reference signals. This method introduces two basic advantages; the first one is that the triangular signal contains the information of the signal to be obtained in output and the second advantage is that its amplitude is varied in proportion to the amplitude of the reference signal. Therefore, in this PWM method, the modulation index is varied according to the variation of the reference signal, so it is termed as Variable Index Pulse Width Modulation. In order to demonstrate the validity of the proposed method, the obtained simulation results are compared with results of the Space Vector Modulation (SVM) approach. Furthermore, it is shown that in the case of nonsinusoidal voltages, the SAF with the proposed control strategy can provide the filtering action. This method is quite easy to implement and requires lower circuitry. The results show that the proposed method can satisfy the IEEE-519 standard regarding the reduction of harmonics.

scholarly journals Harmonic Reduction in Multilevel Inverter Based on Super Capacitor as a Storage

2015 ◽  
Vol 16 (3) ◽  
pp. 520
Author(s):  
Mohammed Rasheed ◽  
Rosli Omar ◽  
Marizan Sulaiman
Keyword(s):  
Distribution System ◽  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Super Capacitor ◽  
Harmonic Reduction ◽  
Ieee Standard

Cascaded H-Bridge multilevel inverter has become more attractive to generate high power in an electrical distribution system. This paper discusses the control of five level cascaded H-bridge multilevel inverter with super capacitor as a Dc energy storage. The control of the multilevel inverter using PI and space vector pulse width modulation (SVPWM) controllers based on the modelling and Simulink of cascaded H-bridge can observe the effectiveness of the proposed control to reduce harmonic contents of the multilevel inverter output. High frequency ripple from the inverters can be removed from the system using low voltage filter. Total harmonic distortion (THD) for both current and voltage is quite low to meet the IEEE standard. Modelling of the system has been done using MATLAB/Simulink.

Harmonic Reduction of Cascaded H -Bridge Multilevel Inverter Using Advanced Level Shifted Pulse Width Modulation Technique

2021 ◽  
Author(s):  
Md. Tariqul Islam ◽  
Md. Fayzur Rahman ◽  
Sourav Barua ◽  
ASM Shihavuddin ◽  
Md. Hasan Maruf ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Advanced Level ◽  
Modulation Technique ◽  
Harmonic Reduction

scholarly journals Development of Shunt Active Power Filter for Harmonic Reduction using Synchronous Reference Frame with Space Vector Pulse Width Modulation

2020 ◽  
Vol 17 (2) ◽  
pp. 104-112
Author(s):  
S.A. Akintade ◽  
Y. Jibril ◽  
A.S. Abubakar
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Input Voltage ◽  
Space Vector ◽  
Nonlinear Load ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Harmonic Reduction ◽  
Synchronous Reference Frame ◽  
Unbalanced Voltage

The work aims at development of Shunt Active Power Filter (SAPF) for harmonic reduction. The current harmonics are being caused by nonlinear characteristic of power electronics based equipments which increase power losses and in turn reduce power quality. Synchronous Reference Frame (SRF) was used as a control strategy and for reference harmonic current generation and Space Vector Pulse Width Modulation (SVPWM) was adopted as switching signal generation. With RL load under balanced input voltage condition, the developed SAPF-SVPWM achieved a reduction of THD of 0.91% as compared to 25.60 before compensation. In addition, the developed SAPF- SVPWM model was compared with SAPF without compensation using RL load under unbalanced voltage and the result shows that the developed SVPWM achieved reduction in THD of 1.74 % as compared to 26.68% after and before compensation. The developed SVPWM model was also compared with SPWM balanced and unbalanced voltage condition. The results show that SVPWM performed better than SPWM. All the results obtained are within IEEE 519 harmonics standard (i.e. THD less than 5%) with nonlinear load under balanced and unbalanced voltage. Keywords: Shunt active filter, input voltage, harmonics, space vector pulse width modulation, nonlinear load.

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