Harmonic Analysis of Multilevel H-Bridge Inverter with Reduced Switches for Solar Power Applications

2020 ◽  
Vol 17 (11) ◽  
pp. 4925-4929
Author(s):  
S. Krishnan ◽  
N. Ravikumar ◽  
P. Thirumal ◽  
R. Balamurali
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Life Span ◽  
Harmonic Analysis ◽  
Traditional Method ◽  
Solar Power ◽  
Electronic Device ◽  
Harmonic Distortion ◽  
Multilevel Converter ◽  
Triggering Circuit

A multilevel H-bridge dc–ac converter is an electronic device, the multilevel converter enhanced stepped output with less switches. This paper deals with H-Bridge multilevel converter it requires only few switches when compared to traditional method. So in proposed method using only few switches, and it requires less gate triggering circuit. Less switches will operates for certain period of time. The proposed circuit is simulated using MATLAB software in that fast Fourier transform test to find the total harmonic distortion. With the proposed method multilevel converter can be used in solar power applications to convert dc supply into ac supply, it produces less harmonics it will enhance life span of the motor and efficiency of the motor will raise because in proposed multilevel converter there is a less switches are used.

scholarly journals Inrush Current Based on Fast Fourier Transform

2021 ◽  
Vol 8 (2) ◽  
pp. 114
Author(s):  
Mochamad Ilham Zamzami ◽  
Eka Prasetyono ◽  
Dimas Okky Anggriawan ◽  
Mike Yuliana
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
System Modeling ◽  
Harmonic Distortion ◽  
Electrical Equipment ◽  
Transient Condition ◽  
Inrush Current ◽  
Simulation Data ◽  
Electrical Components ◽  
Incandescent Lamps

Advances in technology have caused the use of electricity to increase rapidly. With advances in technology, this is followed by the use of increasingly efficient electrical components or equipment. This more efficient electrical equipment causes the impedance of the component to be smaller, causing a surge in current when it is turned on. This current surge, if not followed by appropriate safety precautions, will be damage other components. Each load has different waveform characteristics and current transient peaks. For this reason, it is necessary to analyze the transient condition of a load to overcome this. This paper will explain the characteristics of the inrush current of the load due to ignition. There are three loads used in this study, namely resistive, capacitive and inductive loads. Then the use of this load is simulated by giving different ignition angle values, namely 0, 60, and 90 degrees. The analysis used is the Fast Fourier Transform (FFT) method which is a derivative of the Discrete Fourier Transform. The inrush current spectrum in this simulation is simulated using Simulink MATLAB with switching system modeling using TRIAC. This inrush current simulation data collection uses a sampling frequency of 100 Khz and will be analyzed in the first of 5 cycles. For each load in this paper, the harmonic values for each ignition angle will be presented. The simulation results show that the inrush current is caused by the ignition angle value used and because of components that can deviate energy such as inductors and capacitors as well as components which at the time of starting have a low impedance value such as incandescent lamps. The simulation also shows that the use of switching components for setting the ignition angle causes an increase in the value of Total Harmonic Distortion (THD) but the peak current in the first cycle when the ignition angle is set decreases.

scholarly journals Passive Filter Design for Improving Quality of Solar Power

2018 ◽  
Vol 1 (1) ◽  
pp. 11-16
Author(s):  
Nurhalim Dani Ali ◽  
Noveri Lysbetti M ◽  
Firdaus Firdaus ◽  
Rahyul Amri ◽  
Edy Ervianto
Keyword(s):  
Power System ◽  
Harmonic Analysis ◽  
Solar Power ◽  
Filter Design ◽  
Electric Energy ◽  
Harmonic Distortion ◽  
Power Electronic ◽  
Energy Devices ◽  
Influence Spread

With the progress of industry, power electronic equipment is widely used in power system, it has produced serious harmonic distortion. It goes without saying that harmonic analysis is a very important subject in power system. The influence of harmonics dominant because it is permanent. This harmonic influence spread to energy systems, energy devices, and influential to the energy source. For that, it is necessary a tool that is able to overcome these problems so that the electric energy services are not compromised and the reliability was not reduced. This study how to harmonic analysis, total harmonic distortion, and identifying the inverter at a solar power plant 320WP in accordance with the IEEE 519-2014.

Motor Fault Diagnosis Based on Wavelet Analysis and Fast Fourier Transform

2011 ◽  
Vol 301-303 ◽  
pp. 1401-1405
Author(s):  
Qing Xin Zhang ◽  
Jin Li ◽  
Hai Bin Li ◽  
Chong Liu
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Frequency Spectrum ◽  
Spectrum Analysis ◽  
Traditional Method ◽  
Engineering Application ◽  
Frequency Spectrum Analysis ◽  
Stator Current ◽  
Frequency Components ◽  
Fault Characteristic

For the detection of the broken-bar fault of rotor in motors, a traditional method is frequency spectrum analysis for the stator current. However, the frequency components representative of the rotor fault can be easily submerged by the fundamental frequency, so that the detections results are inaccurate. In this paper, the stator current will be decomposed and reconstructed, after that the fast Fourier transform can be applied to the frequency spectrum analysis. It eliminates the influence that the fault characteristic components are flooded by the basic frequency components. The experiment result shows that the existence of a slight fault in rotor can be detected. The method has a good theoretical and engineering application.

HARMONIC DISTORTION ANALYSIS BASED ON HOPF BIFURCATION THEOREM AND FAST FOURIER TRANSFORM

2007 ◽  
Vol 17 (05) ◽  
pp. 1623-1635 ◽  
Author(s):  
F. I. ROBBIO ◽  
E. E. PAOLINI ◽  
J. L. MOIOLA ◽  
G. CHEN
Keyword(s):  
Fourier Transform ◽  
Hopf Bifurcation ◽  
Fast Fourier Transform ◽  
Frequency Domain ◽  
Harmonic Distortion ◽  
Period Doubling ◽  
Frequency Domain Method ◽  
Colpitts Oscillator ◽  
Eighth Order ◽  
Domain Method

A frequency domain method is used to estimate the harmonic contents of a smooth oscillation arising from the Hopf bifurcation mechanism. The harmonic contents up to the eighth-order are well estimated, which agree with the results obtained from a completely different approach that measures the frequency content of a signal by using digital signal processing techniques such as the Fast Fourier Transform (FFT). The accuracy of the approximation is evaluated by computing the Floquet multipliers of the variational system based on the fact that for periodic solutions one multiplier must be +1. The separation from this theoretical value is proportional to the error of the approximation. A limitation of the frequency domain method is encountered when being used for continuing the secondary branch of limit cycle bifurcations, such as pitchfork and period-doubling bifurcations. Two examples are shown to illustrate the main results: Colpitts' oscillator with a pitchfork bifurcation of cycles, and Chua's circuit with a period-doubling bifurcation of cycles.

scholarly journals Transformer Based Cascaded Multilevel Inverter with Reduced Number of Switches

2021 ◽  
Vol 9 (11) ◽  
pp. 1299-1314
Author(s):  
Dr. T. Murali Mohan
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Power Distribution ◽  
Harmonic Distortion ◽  
Balance Of Power ◽  
Multilevel Inverter ◽  
Two Stage ◽  
Fast Fourier Transform Analysis ◽  
Index Terms ◽  
Cascaded Multilevel Inverter

Abstract: This project presents the simulation of “transformer based cascaded multilevel inverter with reduced number of switches” with R-load and. It has the advantages of reduced number of switches and dc sources compared to conventional configurations and consequently higher efficiency. The simulation is accomplished for one stage (3-level), two stage (5-level, 7- level, 9-level), three stage (7-level, 11-level, 15-level, 19-level, 27-level) and four stage (29-level, 31-level, 33-level, 35-level). And their performance is analysed in terms of THD (Total Harmonic Distortion) for output voltages and currents. The FFT (Fast Fourier Transform) analysis is used in order to evaluate the harmonic distortion. The simulation is carried out by using MATLAB/SIMULINK software. Index Terms: cascaded asymmetric multilevel inverter, transformer-based cascaded multilevel inverter, balance of power distribution.

scholarly journals Implementasi Fast Fourier Transform dalam Pengembangan Alat dan Bantuan Program Untuk Mengukur Total Harmonic Distortion

2019 ◽  
Vol 9 (01) ◽  
pp. 15-22
Author(s):  
Setya - Ardhi ◽  
Judi Prajetno Sugiono ◽  
Hari Sutikno ◽  
Ivan B. Sasaka
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion

Total Harmonic Distortion (THD) adalah salah satu parameter yang menyatakan kualitas dari sebuah sinyal listrik yang hendak dipergunakan dibandingkan dengan sinyal sinusoidal murni. THD adalah suatu ukuran yang menyatakan seberapa besar sinyal yang tidak lagi berbentuk seperti aslinya. Dengan Analisa Fourier, besarnya THD dinyatakan sebagai perbandingan dari rata-rata geometris dari akar jumlah kuadrat harmonisa terhadap fundamental frekuensinya. Penelitian ini bertujuan membangun sebuah alat pengukur THD dengan memanfaatkan microcontroller AVR untuk menghitung THD secara digital. Perhitungan Harmonisa sinyal dalam deret Fourier tidak dilakukan degan cara tradisional, tetapi dilakukan dengan algoritma Fast Fourier Transform (FFT). Algoritma ini secara komputasi numeris akan memberikan kecepatan hitung yang lebih baik dibanding dengan perhitungan tradisional. Uji coba alat dilakukan dengan menggunakan beberapa bentuk sinyal, kemudian hasilnya akan dibandingkan dengan hasil yang dihitung dengan computer. Hasil uji coba menunjukkan bahwa metode ini dapat mampu memberikan akurasi pengukuran besarnya THD dari sebuah sinyal dengan baik.

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