Results 31 to 40 of about 89,369 (307)

Power Quality Improvement Using Dynamic Voltage Restorer

open access: yesIEEE Access, 2020
Power Quality is an essential concern in the modern power system that can affect consumers and utility. The integration of renewable energy sources, smart grid systems and extensive use of power electronics equipment caused myriad problems in the modern ...
Naeem Abas   +4 more
doaj   +1 more source

New Approach for Voltage Drop Estimation in the Busbars of Workshop Networks at Higher Current Harmonics Influence [PDF]

open access: yesProblems of the Regional Energetics, 2019
The presence of higher current harmonics has a negative impact on the efficiency and reliability of the elements of network. Higher current harmonics can lead to significant increases of resistance, voltage drop and active losses in busbar, also to ...
Kotsur M.I.   +3 more
doaj   +1 more source

An MOA Deterioration Monitoring Method Based on an Improved HMM

open access: yesZhejiang dianli, 2022
In view of MOA (metal-oxide arrester) deterioration monitoring, a monitoring method based on an improved hidden Markov model (HMM) is proposed. An improved HMM model used for MOA deterioration monitoring is established by obtaining MOA leakage current ...
FANG Yiyue   +4 more
doaj   +1 more source

The HVDC commutation failure mechanism impacted by harmonics and its suppression method

open access: yesFrontiers in Energy Research
Harmonics are an important cause of voltage distortion, and voltage reduction and voltage distortion are the main causes of commutation failure. But most of the current research studies on commutation failure are based on the drop in fundamental voltage ...
Guojiang Zhang   +4 more
doaj   +1 more source

Fourier Response of a Memristor: Generation of High Harmonics with Increasing Weights

open access: yes, 2012
We investigate the Fourier transform of the current through a memristor when the applied-voltage frequency is smaller than the characteristic memristor frequency, and the memristor shows hysteresis in the current-voltage plane.
Joglekar, Yogesh N., Meijome, Natalia
core   +1 more source

Analysis for Industrial Grid Containing Nonlinear Loads

open access: yesWasit Journal of Engineering Sciences, 2018
Harmonics is the most important issue among all issues related to the power quality. Harmonics comes from different non-linear loads like uninterruptible power supplies systems (UPS), variable speed motor drives, rectifiers, personal computers ...
Basim Mohammed Al Kadhimi
doaj   +1 more source

High Harmonic Reduction Using Passive Filters of Mountain Steel Company

open access: yesZanco Journal of Pure and Applied Sciences, 2021
An increasing amount of power electronics has created an immediate effect on the value of the electrical power source. Both of high control manufacturing loads and national loads explain harmonic in the system voltage.
Asmahan Y. Husen   +2 more
doaj   +3 more sources

On the self-excitation mechanisms of Plasma Series Resonance oscillations in single- and multi-frequency capacitive discharges [PDF]

open access: yes, 2015
The self-excitation of plasma series resonance (PSR) oscillations is a prominent feature in the current of low pressure capacitive radio frequency (RF) discharges.
Brandt, Steven   +5 more
core   +3 more sources

Harmonic resonance on parallel high voltage transmission lines [PDF]

open access: yesIEEE Transactions on Power Delivery, 1997
Harmonic resonance has been observed, measured and modeled on parallel 500-kV lines that are about one wavelength at 2100 Hz, the 35th harmonic. A seemingly small harmonic injection at one location on the system causes significant problems some distance away such as telephone interference.
J.R. Harries, J.L. Randall
openaire   +1 more source

Assessing the effects of power quality on partial discharge behaviour through machine learning [PDF]

open access: yes, 2010
Partial discharge (PD) is commonly used as an indicator of insulation health in high voltage equipment, but research has indicated that power quality, particularly harmonics, can strongly influence the discharge behaviour and the corresponding pattern ...
Bahadoorsingh, S.   +4 more
core  

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