Simultaneous total harmonic distortion minimization and selective harmonic elimination: Combining the best of both worlds

2016 ◽  
Author(s):  
Kenessary Koishybay ◽  
Tohid Alizadeh ◽  
Yakov L. Familiant ◽  
Alex Ruderman
Keyword(s):  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Distortion Minimization

scholarly journals A novel optimization harmonic elimination technique for cascaded multilevel inverter

2019 ◽  
Vol 8 (2) ◽  
pp. 405-413 ◽  
Author(s):  
Ezzidin Hassan Aboadla ◽  
Sheroz Khan ◽  
Mohamed H. Habaebi ◽  
Teddy Surya Gunawan ◽  
Belal A. Hamida ◽  
...  
Keyword(s):  
Output Voltage ◽  
Printed Circuit Board ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Circuit Board ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Voltage Signal ◽  
Cascaded Multilevel Inverter

The main goal of utilizing Selective Harmonic Elimination (SHE) techniques in Multilevel Inverters (MLI) is to produce a high-quality output voltage signal with a minimum Total Harmonic Distortion (THD). By calculating N switching angles, SHE technique can eliminate (N-1) low order odd harmonics of the output voltage waveform. To optimized and obtained these switching angles, N of nonlinear equations should be solved using a numerical method. Modulation index (m) and duty cycle play a big role in selective harmonic elimination technique to obtain a minimum harmonic distortion and desired fundamental component voltage. In this paper, a novel Optimization Harmonic Elimination Technique (OHET) based on SHE scheme is proposed to re-mitigate Total Harmonic Distortion. The performance of seven-level H-bridge cascade inverter is evaluated using PSIM and validated experimentally by developing a purposely built microcontroller-based printed circuit board.

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.

scholarly journals WTHD minimisation in hybrid multilevel inverter using biogeographical based optimisation

2014 ◽  
Vol 63 (2) ◽  
pp. 187-196
Author(s):  
R. Kavitha ◽  
Rani Thottungal
Keyword(s):  
Lower Order ◽  
Harmonic Distortion ◽  
Transcendental Equation ◽  
Multilevel Inverter ◽  
Total Harmonic Distortion ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Simulation Results ◽  
Cascaded Multilevel Inverter ◽  
Inverter Topology

Abstract Harmonic minimisation in hybrid cascaded multilevel inverter involves complex nonlinear transcendental equation with multiple solutions. Hybrid cascaded multilevel can be implemented using reduced switch count when compared to traditional cascaded multilevel inverter topology. In this paper Biogeographical Based Optimisation (BBO) technique is applied to Hybrid multilevel inverter to determine the optimum switching angles with weighted total harmonic distortion (WTHD) as the objective function. Optimisation based on WTHD combines the advantage of both OMTHD (Optimal Minimisation of Total Harmonic Distortion) and SHE (Selective Harmonic Elimination) PWM. WTHD optimisation has the benefit of eliminating the specific lower order harmonics as in SHEPWM and minimisation of THD as in OMTHD. The simulation and experimental results for a 7 level multilevel inverter were presented. The results indicate that WTHD optimization provides both elimination of lower order harmonics and minimisation of Total Harmonic Distortion when compared to conventional OMTHD and SHE PWM. Experimental prototype of a seven level hybrid cascaded multilevel inverter is implemented to verify the simulation results.

scholarly journals Selective Harmonic Elimination of an Eleven Level Inverter Using Whale Optimization Technique

2018 ◽  
Vol 9 (4) ◽  
pp. 1944 ◽  
Author(s):  
Srikanta Kumar Dash ◽  
Byamakesh Nayak ◽  
Jiban Ballav Sahu
Keyword(s):  
Lower Order ◽  
Optimization Technique ◽  
Harmonic Distortion ◽  
Optimization Techniques ◽  
Total Harmonic Distortion ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Whale Optimization ◽  
Selective Harmonic Elimination ◽  
Cascaded Multilevel Inverter

Reduction of total harmonic distortion in multilevel inverters is a difficult optimization problem that includes nonlinear transcendent equations having more than one local minima.This paper deals with the harmonic elimination of cascaded multilevel inverter with equal D.C. sources using a new optimization technique. The objective of this paper is to find the best combination of switching angles to minimize the lower order harmonics and the total harmonic distortion is reduced. For this purpose, a new optimization techniques i.e. whale optimization technique is considered.This algorithm is applied to an 11-level cascaded H-bridge inverter.Results shows that WOA gives better results and effectively minimizes the THD and lower order harmonics

Utlization Cat Swarm Optimization Algorithm for Selected Harmonic Elemination in Current Source Inverter

2015 ◽  
Vol 6 (4) ◽  
pp. 888 ◽  
Author(s):  
Hamed Hosseinnia ◽  
Murteza Farsadi
Keyword(s):  
Heuristic Algorithm ◽  
Optimization Algorithm ◽  
Current Source ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Voltage Source ◽  
Swarm Optimization ◽  
Current Source Inverter ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination

The voltage source inverter (VSI) and Current source inverter (CSI) are two types of traditional power inverter topologies.In this paper selective harmonic elimination (SHE) Algorithm was impelemented to CSI and results has been investigated. Cat swarm (CSO) optimization is a new meta-heuristic algorithm which has been used in order to tuning switching parameters in optimized value.Objective fuction is reduction of total harmonic distortion(THD) in inverters output currents.All of simulation has been carried out in Matlab/Software.

FPGA Based Selective Harmonic Elimination Technique for Multilevel Inverter

2018 ◽  
Vol 9 (1) ◽  
pp. 166 ◽  
Author(s):  
T. Porselvi ◽  
K. Deepa ◽  
R. Muthu
Keyword(s):  
Power Generation ◽  
Lower Order ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
New Technique ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Medium Range ◽  
Field Programmable ◽  
A New Technique

Harmonic elimination at the fundamental frequency is very much appropriate for high and medium range of power generation and applications. This paper considers a new technique for selective harmonic elimination (SHE), in which the total harmonic distortion (THD) is minimized when compared with that of the conventional one. With this technique, the harmonics at lower order are eliminated, which are more predominant than the higher ones.Cascaded H-Bridge inverter fed by a single DC is considered which is simulated with the switching angles generated by both the conventional method of SHE and the new method of SHE. The simulated results of the load voltage and the waveforms of the harmonic analysis are shown. The THD values are compared for the two techniques.  The experimental results are also shown for the new technique. The switching angles are generated with the help of field programmable gated array (FPGA) in the hardware. The value of experimental THD of voltage is compared with that of simulated THD and the comparison prove that the results are satisfactory.

scholarly journals Selective Harmonic Elimination Based THD Minimization of a Symmetric 9-Level Inverter Using Ant Colony Optimization

2021 ◽  
Vol 8 (5) ◽  
pp. 769-774
Author(s):  
Neerudi Bhoopal ◽  
Dokku Sivanaga Malleswara Rao ◽  
Bharath Kumar Narukullapati ◽  
Idamakanti Kasireddy ◽  
Devineni Gireesh Kumar
Keyword(s):  
Ant Colony Optimization ◽  
Single Phase ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Low Frequency ◽  
Ant Colony ◽  
Medium Voltage ◽  
Semiconductor Switches ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination

This paper proposed a new topology of a symmetric single-phase multilevel inverter with the smaller number of semiconductor switches and optimized low-frequency control methods to optimize the Total Harmonic Distortion. A nine-level single phase output is obtained by eight number of active semiconductor switches, four diodes and four capacitors from two asymmetrical dc sources. The selected harmonic order in the output voltage is eliminated by the PWM (SHE-PWM) based on selective harmonic elimination. To optimize the switching angles, an ant colony optimization is introduced. The proposed SHE-PWM and ant optimization are implemented and tested for THD on the SIMULINK platform. The proposed approach offers less THD and is best suited to high-power applications with medium voltage.

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