Results 31 to 40 of about 842,734 (293)

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

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

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

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

An improved single phase SPLL with DC and harmonics suppression

open access: yesEnergy Reports, 2023
This paper has proposed an improved single phase software phase lock loop (SPLL) with the ability of grid voltage DC and harmonics components suppression.
Long Xiao, Dongdong Chen
doaj   +1 more source

Harmonics Study of 3-Phase Space Vector PWM Inverter [PDF]

open access: yesEngineering and Technology Journal, 2011
This paper proposes the modeling ,implementation and simulation of three phase induction motor driver, using voltage- fed space vector pulse width modulation technique (SVPWM).The sources of total harmonics (i.e. total effective harmonics,inter-harmonics,
Ahamed Assad Hadi, Majid K. Al-Khatat
doaj   +1 more source

Harmonic Voltage Reflection Analysis of UHF RFID Chips

open access: yesIEEE Transactions on Instrumentation and Measurement, 2021
In recent years, the exploitation of the nonlinear behavior of ultrahigh-frequency (UHF) radio frequency identification (RFID) chips has gained popularity. This article presents a measurement platform for the harmonic characterization of UHF RFID chips.
Muralter, Florian   +4 more
openaire   +2 more sources

dynoGP: Deep Gaussian Processes for Dynamic System Identification

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces a novel class of deep models for system identification, dynamical deep Gaussian processes, which combine the strengths of data‐driven methods, such as those based on neural network architectures, with the ability to output a probability distribution for uncertainty representation.
Alessio Benavoli   +3 more
wiley   +1 more source

Tuning harmonic absorption of voltage source converters

open access: yes, 2010
This paper develops a tool for controlling the harmonic absorption of hysteretic controlled voltage source converters that are connected to a power system. Each VSC is controlled by a state feedback control input to a hysteretic comparator.
Zare, F   +7 more
core   +1 more source

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