Harmonic estimation in a power system using a novel hybrid Least Squares-Adaline algorithm

Joorabian, Mahmood; Mortazavi, S. S.; Khayyami, A.A.

doi:10.1016/j.epsr.2008.05.021

Cited by 79 publications

(49 citation statements)

References 8 publications

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“…Bu tür durumlarda harmonik kestirimi için Yapay Sinir Ağları (YSA) kullanılabilmektedir. Yapısal kolaylıklarına rağmen YSA'nın, ağırlık atamalarına bağlı olarak zamansız yakınsaması gibi nedenlerle başarımının değişebilmesi ve yakınsama hızlarının düşük olması gibi dezavantajları vardır [6][7][8][9][10][11]. Zamanla değişen sinyaller söz konusu olduğunda, öz-yenilemeli dinamik analiz yöntemleri basit yapılarından dolayı en çok tercih edilen yöntemlerdendir [12].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Elektri̇k Güç Si̇stemleri̇nde Zaman-Harmoni̇k Anali̇zi̇

Germeç¹,

Erdem²

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu çalışmada, elektrik güç sistemlerinde zamanla değişen sinyaller için temel frekans tespiti ile harmonik ve araharmonik bileşenlerin genlik ve faz açılarının kestirimini kapsayan çok işlevli bir sistem yapısı geliştirilmiştir. Gerçekleştirilen bu sistem, basit ve açık yapısından dolayı başarımı arttıracak müdahalelerle harmonik bileşenlerinin yanı sıra, bu bileşenlerin hangi zaman aralığında ve ne oranda etkin oldukları bilgisini sunmaktadır. MATLAB programı ile benzetim ortamında yapılan çalışmalar, sistemin, akım ve gerilim dalga şekillerinin harmonik analizinde kullanışlı, etkin sonuçlar verdiğini göstermektedir. Bununla, zamanla değişen harmonik ve ara-harmoniklerin bireysel etkileri, zaman-harmonik uzayında gerçek zamanlı ve 3 boyutlu olarak tespit edilebilecektir.Anahtar Kelimeler: Güç sistemlerinde gerçek zamanlı harmonik tespiti, temel frekans kestirimi, zamanla değişen harmonik ve ara harmonikler, zaman-harmonik analizi TIME-HARMONIC ANALYSIS IN ELECTRIC POWER SYSTEMS ABSTRACTIn this study, for time-varying signals in electric power systems, a multi functional system structure involving fundamental frequency detection, phase angle and amplitude estimation of harmonic and interharmonic components have been developed. Due to its simple and open structure, this system provides knowledge of harmonic component values as well as information about at which intervals and to what extend these component values are effective, which is possible with interventions that improve performance.The results of the experimental studies performed by using MATLAB simulation environment show that, this system is convenient and effective for the harmonic analysis of the current and voltage waveforms. Therewith, the individual effects of this time-variant harmonic and interharmonic components could be instantly detected in 3D time-harmonic space.

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Section: Gi̇ri̇ş (Introduction)unclassified

Elektri̇k Güç Si̇stemleri̇nde Zaman-Harmoni̇k Anali̇zi̇

Germeç¹,

Erdem²

2015

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…A novel hybrid approach, based on the decomposition of the problem into a linear and a nonlinear problem, was proposed by Joorabian et al (2009), a linear estimator, i.e., Least Squares (LS), which is simple, fast and does not need any parameter tuning to follow harmonics amplitude changes, is used for amplitude estimation and an adaptive linear combiner called 'Adaline', which was very fast and very simple and was used to estimate phases of harmonics. An improvement in convergence and processing time is achieved using this algorithm [6].The one-dimension frequency analysis based on DFT (Discrete FT ) is sufficient in many cases in detecting power disturbances and evaluating power quality (PQ). The character of the signal, using time-frequency analyses are performed by Szmajda et al(2010).…”

Section: IIImentioning

confidence: 99%

Harmonics Detection Using Prony Frequency Analysis Algorithm in Transformer Inrush Current Generation after Fault Clearance

Wylie¹,

Tiwari²

2014

International Journal of Innovative Research in Electrical, Ele

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Abstract:The traditional infrastructure of power system industry is presently going through large amount of change that consensus over the improvement of power quality for fulfilling this requirement electronically automated devices having high sensitivity toward the disturbance in the power system signals are under the major consensus of research activities. The low power quality signal is responsible for malfunctioning of equipments that result in reduction of production and rise in the cost of production. In the modern age electronic convertors, facts and other thyristor controlled devices is combine with the new power transmission schemes. That produces harmonics current of high frequency order and brings large amount of current and voltage quality distortion. In this paper we are investigating and implementing the Prony harmonics analysis algorithm for estimation of harmonics in the voltage cycle available during saturable core transformer energizing the result are validate and compared with the short time Fourier analysis our proposed approach found to be more accurate and aliquant for non linear discrete data signals.

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“…Besides, the time delay of sampling and computation of Fourier coefficients make it difficult for real-time implementation [11]. To overcome the shortage of employing FFT method for analyzing harmonic, other advanced techniques have been developed.…”

Section: Introductionmentioning

confidence: 99%

Acceleration Harmonic Estimation in a Hydraulic Shaking Table Using Water Cycle Algorithm

Yao

Wan

2018

Shock and Vibration

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Hydraulic shaking table is mainly used to stimulate the desired vibration environment and evaluate the shock resistance of structure. However, due to the inherent nonlinearities of the hydraulic shaking table, the acceleration response displays amplitude attenuation and phase delay for sinusoidal excitation signal. The distorted response degrades the control performance and even leads to an increase in system instability. In this paper, the water cycle algorithm (WCA), a recently developed metaheuristic method, is developed to estimate the harmonic information such as amplitude and phase. The basic idea of the proposed algorithm is inspired from nature and based on the observation of water cycle process and how rivers and streams flow to the sea in the nature world. The estimation process based on WCA is sequentially updating the weight vector of the signal. The amplitude and phase of fundamental as well as each harmonic can be achieved when the objective function is minimized. Simulation and experimental results demonstrate that the proposed harmonic estimation algorithm has good real-time performance, fast convergence, and excellent accuracy.

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Harmonic estimation in a power system using a novel hybrid Least Squares-Adaline algorithm

Cited by 79 publications

References 8 publications

Elektri̇k Güç Si̇stemleri̇nde Zaman-Harmoni̇k Anali̇zi̇

Elektri̇k Güç Si̇stemleri̇nde Zaman-Harmoni̇k Anali̇zi̇

Harmonics Detection Using Prony Frequency Analysis Algorithm in Transformer Inrush Current Generation after Fault Clearance

Acceleration Harmonic Estimation in a Hydraulic Shaking Table Using Water Cycle Algorithm

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