scholarly journals A Novel RPWN Selective Harmonic Elimination Method for Single-Phase Inverter

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 489 ◽  
Author(s):  
Guohua Li ◽  
Chunwu Liu ◽  
Zhenfang Fu ◽  
Yufeng Wang
Keyword(s):  
Simple Algorithm ◽  
Duty Ratio ◽  
Switching Cycle ◽  
Elimination Method ◽  
Harmonic Elimination ◽  
Power Spectral ◽  
Selective Harmonic Elimination ◽  
Specific Frequency ◽  
Single Phase Inverter ◽  
Two Parameters

In the existing random pule width modulation (RPWM) selective harmonic elimination methods, the formula of switching cycle TN+1 is complex, and the duty ratio DN+1 of the next switching cycle needs to be calculated in advance. However, in the case of unknown TN+1, DN+1 is also difficult to calculate accurately, and the two parameters are based on each other. A novel selective harmonic elimination method in RPWM is proposed in this paper. The PWM voltage pulse is placed at the back of the switch cycle, which simplifies the formula of the switch cycle TN+1 and eliminates the need to calculate the duty ratio DN+1. Two kinds of RPWM selective harmonic elimination ideas are summarized. The general formulas of the switch cycle, the effective random number k, and the upper and lower limits of switch frequency corresponding to k are derived. The spectrum shaping of inverter output voltage can be realized without using digital filter in this method. Simple algorithm, small calculation and easy implementation are characteristics of the proposed method. The simulation and experimental results confirm the ability of the proposed method for reducing harmonics at the specific frequency in power spectral density (PSD).

A Universal Selective Harmonic Elimination Method for High-Power Inverters

2011 ◽  
Vol 26 (10) ◽  
pp. 2743-2752 ◽  
Author(s):  
Damoun Ahmadi ◽  
Ke Zou ◽  
Cong Li ◽  
Yi Huang ◽  
Jin Wang
Keyword(s):  
High Power ◽  
Elimination Method ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Power Inverters

Selective harmonic elimination method for wide range of modulation indexes in multilevel inverters using ICA

2014 ◽  
Vol 21 (4) ◽  
pp. 1329-1338 ◽  
Author(s):  
Ali Ajami ◽  
Mohammad Reza Jannati Oskuee ◽  
Ataollah Mokhberdoran ◽  
Hossein Shokri
Keyword(s):  
Elimination Method ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Wide Range ◽  
Selective Harmonic Elimination

scholarly journals THD Minimization in Cascaded H-Bridge Inverter using Optimal Selective Harmonic Elimination

2021 ◽  
Vol 10 (2) ◽  
pp. 170-174
Author(s):  
K Venkateswara Rao ◽  
◽  
G Joga Rao ◽  
Keyword(s):  
Lower Order ◽  
Simple Structure ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Elimination Method ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Index Terms ◽  
Simulation Results

Cascaded structured multilevel inverters are gaining lot of importance due to their simple structure and easiness in implementation. In this paper, the optimum selective harmonic elimination method is employed for a nine level inverter to suppress the selected lower order harmonic, which reduces the total harmonic distortion of the inverter considerably. The Newton rapson algorithm is employed in finding the switching angles that minimizes certain lower order harmonics. The order of the harmonics that are eliminated are third, fifth, and seventh harmonics. All the simulation results included for a nine level inverter using SIMULINK. Index Terms: Nine level MLI, Control of inverter, Modular Inverter.

Sign in / Sign up

Export Citation Format

Share Document