نتایج جستجو برای: harmonics estimation

تعداد نتایج: 271817  

In this paper a novel hybrid algorithm for harmonics estimation in power systems is proposed. The estimation of the harmonic components is a nonlinear problem due to the nonlinearity of phase of sinusoids in distorted waveforms. Most researchers implemented nonlinear methods to extract the harmonic parameters. However, nonlinear methods for amplitude estimation increase time of convergence. Hen...

Journal: :modeling and simulation in electrical and electronics engineering 2015
zahra moravej javad enayati

in this paper a novel hybrid algorithm for harmonics estimation in power systems is proposed. the estimation of the harmonic components is a nonlinear problem due to the nonlinearity of phase of sinusoids in distorted waveforms. most researchers implemented nonlinear methods to extract the harmonic parameters. however, nonlinear methods for amplitude estimation increase time of convergence. hen...

2014
Pratap Sekhar Puhan Pravat Kumar Ray Gayadhar Panda

This paper proves the effectiveness of Least Mean Square (LMS) estimation algorithm for estimation of power system harmonics, inter-harmonics and sub-harmonics of distorted signal. Accurate estimation can be achieved by this technique for harmonics, sub-harmonics and inter-harmonics estimation including possible variation in the signal such as change in amplitude when applied to a distorted pow...

2016
Sanjay Agrawal Soumya R. Mohanty Vineeta Agarwal

This paper presents application of parametric techniques (Estimation of signal parameter by rotational invariance techniques (ESPRIT), Root multiple signal classification (Root MUSIC)) for the estimation of harmonics/inter harmonics produced by wind generator under constant, variable rotor speed, load imbalance. Accuracy of estimation by parametric techniques is checked on synthetic signal as w...

جلیلیان, علیرضا , حدادی, امیر موسی , کاظمی, احد ,

This paper presents an improved global-best harmony search (IGHS) method to estimate the harmonics in power systems. It utilizes IGHS to estimate the harmonic components of a distorted signal along with adaptive noise. The harmonic estimation problem is linear in amplitudes and nonlinear in phases and frequencies. IGHS is used to estimate phases and frequencies, whereas the least square (LS) me...

ژورنال: ژئوفیزیک ایران 2018

Surface nuclear magnetic resonance (surface-NMR) method is a well-known tool for determining the water-bearing layers and subsurface resistivity structure. Harmonic interference is an inevitable interference in surface-NMR measurements. Accurate estimation of harmonic interference parameters (i.e., fundamental frequency, phase and amplitude) leads to better retrieval of power-line harmonics and...

Journal: :Intelligent Automation & Soft Computing 2007
Syed Faisal Ali Shah Maamur Bettayeb

The paper presents a novel approach to estimate harmonics in multiplicative and additive noise using a Genetic Algorithm (GA). The estimation of parameters is formulated as a nonlinear optimization problem and simulations are carried out to assess the performance of the proposed GA-based harmonics estimation.

2008
John Woodruff Yipeng Li DeLiang Wang

In mixtures of pitched sounds, the problem of overlapping harmonics poses a significant challenge to monaural musical sound separation systems. In this paper we present a new algorithm for sinusoidal parameter estimation of overlapping harmonics for pitched instruments. Our algorithm is based on the assumptions that harmonics of the same source have correlated amplitude envelopes and the phase ...

2008
John Woodruff Yipeng Li DeLiang Wang

In mixtures of pitched sounds, the problem of overlapping harmonics poses a significant challenge to monaural musical sound separation systems. In this paper we present a new algorithm for sinusoidal parameter estimation of overlapping harmonics for pitched instruments. Our algorithm is based on the assumptions that harmonics of the same source have correlated amplitude envelopes and the phase ...

شیروانی, حسین , فرخ پیام, امیر , معلم, مهدی , میرزائیان دهکردی, بهزاد , کیوانفرد, محمد ,

In this paper an effective method for the purpose of state estimation of fundamental and harmonics signals in the radial power distribution network is presented. In Addition, the application development of this method to the network observability and data processing is considered and analyzed. One of the most advantages of this method is capability of bad data detection and process of them and ...

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