Identification of interharmonics using disperse energy distribution algorithm for flicker troubleshooting

Lin, Hsiung Cheng

doi:10.1049/iet-smt.2016.0110

Cited by 7 publications

(9 citation statements)

References 29 publications

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“…Harmonics can also be categorised by frequency where traditional harmonics exist at integer multiples of the supply frequency and inter-harmonics exist at non-integer multiples. These are produced by modern asynchronous switching converters, among other sources, and can be a major cause of flicker [11]. More recently, inter-harmonics have received interest from both research and regulatory bodies [12].…”

Section: Harmonic Sources and Their Typesmentioning

confidence: 99%

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Harmonic reduction methods for electrical generation: a review

Fallows

Nuzzo

Costabeber

et al. 2018

IET Generation, Transmission & Distribution

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This paper provides a comprehensive literature review of techniques for harmonic related power quality improvement of electrical generation systems. An increasing interest in these aspects is due to the ever more stringent power quality requirements, deriving from new grid codes and compliancy standards, aimed at limiting waveform harmonic distortion at all points of the distribution network. Although a wealth of literature is available for such techniques, it has never been compiled into a handbook incorporating all the solutions aimed at both electrical machine and power systems engineers. IntroductionIn the world of electrical power generation, a main point of consideration has always been to achieve adequate performance in terms of power quality. In this context, an important factor is the generation, management and reduction/compensation of spatial and time harmonics throughout the whole power system. From the first developments in the mid-1800s of electrical power generation and distribution systems, harmonic content improvement and reduction has evolved from a localised generator design problem to an internationally regulated supply characteristic that must be considered at all points of the power distribution network.This paper is thus aimed to be a review of harmonic improvement techniques and methodologies, organised to follow and indicate the development timeline of these methods. Distribution level generation has been chosen as the focus to align with recent changes in grid topology caused by distributed and renewable generation. In this section, the paper begins by detailing the changing nature of power quality in distribution networks followed by a description of the main types of power quality issues and an overview of the key standards governing network limits. The focus then shifts to harmonic reduction procedures and methodologies. A review of harmonic reduction methods based around the design of rotating electrical generators is developed, followed by a review of modern methods applied to new generation systems, such as renewable sources.

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Section: Harmonic Sources and Their Typesmentioning

confidence: 99%

“…These are produced by modern asynchronous switching converters, among other sources, and can be a major cause of flicker [11]. More recently, inter-harmonics are receiving interest from both research and regulatory bodies [12].…”

Section: Harmonic Sources and Their Typesmentioning

confidence: 99%

Harmonic reduction methods for electrical generation: a review

Fallows

Nuzzo

Costabeber

et al. 2018

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

show abstract

“…Harmonics and interharmonics disturbances in electrical systems increase as new electronic power devices are connected to the power system [1]. The time-varying, switching circuits, static converters, frequency inverters for speed adjustment of motors, electric-arc furnaces, and other asynchronous pulsed loads generate these distortions [2].…”

Section: Introductionmentioning

confidence: 99%

“…overheating effect on energy conductors, decreasing the lifetime of electrical appliances and causing interferences in AC grid systems [4]. In turn, the interharmonics components generate effects such as flickering in lighting systems and computer monitors, sub-synchronous oscillations, and voltage fluctuations [1], [2], [5].…”

Section: Introductionmentioning

confidence: 99%

“…Several methods for estimating individually interharmonic components are proposed in the literature. An algorithm called Dispersed Energy Distribution (DED) has been proposed by [1]. This method allows estimating the interharmonics components apart, by calculating the frequency deviation according to the energy distribution in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

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An Algorithm Based on Sparse Decomposition for Estimating Harmonic and Interharmonic Components of Stationary Signals in Power Systems

2019

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Many methods for estimating frequency components of stationary signals in power systems are based on the Discrete Fourier Transform. These methods have a fixed frequency resolution which depends on the sampling frequency and the number of samples of the signal, making it difficult to estimate interharmonics. This paper presents an algorithm for estimating harmonics and interharmonics of power system signals using the signal sparse decomposition technique with an overcomplete dictionary. Discrete Trigonometric Transforms have been analyzed for building this dictionary. The l-fold method has also been applied to the dictionary, which has allowed the adjustment of the frequency grid of the output spectrum. The algorithm proposed is called Harmonics and Interharmonics components Estimation based on Signal Sparse Decomposition, and it was assembled using a dictionary formed by atoms of Discrete Cosine and Discrete Sine Transforms of type II. Three synthetic signals containing harmonic and interharmonics distortions with different noise conditions were used to test the algorithm. The proposed method presented better results in the estimation of harmonic and interharmonics than Discrete Fourier Transform, Matrix Pencil Method and Fast Matching Pursuit algorithms. The results demonstrated robustness to noise and adequate estimation of the interharmonics when the frequency grid is adjusted correctly. INDEX TERMS Discrete trigonometric transform, harmonics and interharmonics estimation, overcomplete dictionary, power quality signal analysis, signal sparse decomposition.

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Development of interharmonics identification using enhanced‐FFT algorithm

Lin

2017

J. eng.

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Identification of interharmonics using disperse energy distribution algorithm for flicker troubleshooting

Cited by 7 publications

References 29 publications

Harmonic reduction methods for electrical generation: a review

Harmonic reduction methods for electrical generation: a review

An Algorithm Based on Sparse Decomposition for Estimating Harmonic and Interharmonic Components of Stationary Signals in Power Systems

Development of interharmonics identification using enhanced‐FFT algorithm

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