A Fuzzy Adaptive Detecting Approach of Harmonic Currents for Active Power Filter

Qu, Yanbin; Tan, Weipu; Yang, Yong

doi:10.1109/peds.2007.4487936

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…It is worth noting that the available data are not considered to be subject to uncertainty or inaccuracy. As for such problems, fuzzy logic [34][35][36] may bring better results.…”

Section: Verification: Casementioning

confidence: 99%

A Real-Time Harmonic Extraction Approach for Distorted Grid

Li¹,

Li²,

Li³

et al. 2021

Mathematics

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Harmonic interference is a major hazard in the current power system that affects power quality. How to extract harmonics quickly and accurately is the premise to ensure the sustainable operation of power system, which is particularly important in the field of new energy power generation. In this paper, a harmonic extraction method based on a time-varying observer is proposed. Firstly, a frequency estimation algorithm is used to estimate the power grid current frequency, which can estimate the frequency in real time. Then, applying the zero-crossing detection method to convert the frequency into a phase variable. Finally, using the phase variable and integral current signal as input, a observer is modeled to extract each order harmonic component. The proposed method is evaluated on a FGPA test platform, which shows that the method can extract the harmonic components of the grid current and converge within 80 ms even in the presence of grid distortions. In the verification case, the relative errors of the 1st, 5th, 7th and 11th harmonics are 0.005%, −0.003%, 0.251% and 0.620%, respectively, which are sufficiently small.

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“…It is worth noting that the available data are not considered to be subject to uncertainty or inaccuracy. As for such problems, fuzzy logic [34][35][36] may bring better results.…”

Section: Verification: Casementioning

confidence: 99%

A Real-Time Harmonic Extraction Approach for Distorted Grid

Li¹,

Li²,

Li³

et al. 2021

Mathematics

View full text Add to dashboard Cite

show abstract

“…But it requires prior trainings of the network. In spite of the superior performance, the predictive controllers have two main drawbacks: First, they require considerable calculations; second, a good knowledge of system parameters is critical for their implementation [36][37][38]. In order to reduce computational burden, very often Artificial Neural network predictor is used [39].…”

Section: Predictive Controlmentioning

confidence: 99%

Current Controllers of Active Power Filter for Power Quality Improvement: A Technical Analysis

Dey

Mekhilef

2015

Automatika

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Original scientific paperNon-linear load deteriorates the quality of current waveforms at the point of common coupling of various consumers. Active power filter (APFs) is used to mitigate the most concern harmonic pollution in an electrical network. The controller part is the nucleus of an active power filter configuration. Active power filter performance is affected significantly by the selection of current control techniques. The active filter and its current control must have the capability to track sudden slope variations in the current reference to compensate the distorted current drawn by the voltage source inverter. Therefore, the choice and implementation of the current regulator is more important for the achievement of a satisfactory performance level. In this survey, technical reviews of various types of controllers covering a wide range have been presented. This work also reveals the advantages and disadvantages of the practiced control strategies. The effectiveness of the study will help the researchers to choose the proper control methods for various applications of active power filter. Key words: Active power filters, Control algorithms, Current controllers, Comparison, Harmonic currents Power quality, Total harmonic distortion, Root mean square (RMS) errorRegulatori struje aktivnih filtara snage za poboljšanje kvalitete snage: Tehnička analiza. Nelinearni tereti pogoršavaju kvalitetu strujnih valova u točki u kojoj se spaja više potrošača. Aktivni filtar snage se koristi za ublaža-vanje najvažnijeg harmoničkog onečišćenja strujne mreže. Jezgra aktivnog filtra snage je regulator. Na performanse aktivnog filtra snage značajno utječe odabir upravljačke tehnike. Aktivni filtar i njegova tehnika upravljanja strujom moraju imati mogućnost pratiti nagle skokove u referentnoj vrijednosti struje kako bi mogli kompenzirati izobličenja struje koju vuče inverter naponskog izvora. Zato su izbor i implementacija regulatora struje iznimno važni za postizanje zadovoljavajuće razine performansi. U ovom pregledu su predstavljene tehničke recenzije koje pokrivaju širok raspon regulatora. Ovaj rad takoer otkriva prednosti i mane korištenih strategija upravljanja. Efektivnost ovog pregleda pomoćiće istraživačima da izaberu ispravnu metodu upravljanja za različite aplikacije aktivnog filtra snage.

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A Fuzzy Adaptive Detecting Approach of Harmonic Currents for Active Power Filter

Cited by 2 publications

References 7 publications

A Real-Time Harmonic Extraction Approach for Distorted Grid

A Real-Time Harmonic Extraction Approach for Distorted Grid

Current Controllers of Active Power Filter for Power Quality Improvement: A Technical Analysis

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