Results 71 to 80 of about 110,149 (199)

HARMONICS ANALYSIS OF A WIND ENERGY CONVERSION SYSTEM WITH A PERMANENT MAGNET SYNCHRONOUS GENERATOR

open access: yes, 2015
Global energy demands are growing daily, with renewable energy options such as wind power emerging as attractive alternatives to fossil fuels. This thesis is mainly doing simulation using Matlab to filter harmonics which are found in a Permanent Magnet ...
Nasr, Abdulhakim
core  

Utilización de dispositivos FACTS en acerías para mejorar su comportamiento técnico económico

open access: yesRevista Científica de Ingeniería Energética, 2010
Steelworks in general and electric arc furnaces (EAF) in particular, are compelling loads to Power Systemas they frequently introduce disturbances in the distribution network near the facility.
Antonio Baltasar; et al.
doaj  

Mixed-Integer Distributed Ant Colony Multi-Objective Optimization of Single-Tuned Passive Harmonic Filter Parameters

open access: yesIEEE Access, 2019
The extended ant colony known as the Mixed Integer Distributed Ant Colony Optimization (MIDACO) is presented in this paper as a new application of solving multi-objective single-tuned passive filters design problems.
Ahmed Faheem Zobaa
doaj   +1 more source

Harmonic Analysis of Grid-Connected VSCs Controlled in the Stationary Frame: Disturbance Rejection, Resonant Controller Design and Limitations

open access: yesEletrônica de Potência
The increase in the penetration of inverter based renewable energy resources comes with several challenges. For one, the power quality can be cited as an issue due to the impact of the electronic devices in the grid voltage profile, which can cause ...
André G. P. Alves   +5 more
doaj   +1 more source

High-Frequency Behavior of Residual Current Devices [PDF]

open access: yes, 2012
The purpose of this paper is to analyze the behavior of residual current devices at frequencies higher than the rated one. Many experiments are carried out by measuring tripping current and time of devices of different typology, produced by different ...
Freschi, Fabio
core   +1 more source

Harmonic Causation and Harmonic Echoes [PDF]

open access: yesNature, 1873
IN reference to the question of “Harmonic Echoes,” allow me to suggest to those who may have the opportunity of observation, how desirable it is that these echo-tones should be investigated in a manner to determine whether they are truly harmonic or not. There would be no difficulty in testing the sounds given in response to the notes of a closed organ-
openaire   +1 more source

ВЛИЯНИЕ НЕСИНУСОИДАЛЬНОСТИ ФОРМЫ ТОКОВ И НЕРАВНОМЕРНОСТИ ТЕКУЩЕЙ МОЩНОСТИ ОТДЕЛЬНОГО ЭЛЕКТРОПОТРЕБИТЕЛЯ НА ПОТЕРИ В ЭНЕРГОСИСТЕМЕ

open access: yesElektrotehnìka ta Elektroenergetika, 2007
Выполнена количественная оценка и предложены расчетные зависимости для потерь в энергосистеме, вызванных влиянием несинусоидальной формы токов и неравномерности текущей мощности отдельного электропотребителя.
A. V. Volkov, O. G. Miroshnichenko
doaj  

Fuzzy Logic Controller Based Hybrid Anti Islanding Protection Scheme for Distributed Generators [PDF]

open access: yesJournal of Renewable Energy and Environment
In this research work, a fuzzy logic controller is designed and implemented for small signal stability analysis and anti-islanding protection on the CEGRE LV system. An activated oscillatory disturbance-type signal injection is required in the algorithm.
Dhanashri Changan, Pranav Darji
doaj   +1 more source

Harmonic Matrix and Harmonic Energy

open access: yesJOURNAL OF ADVANCES IN MATHEMATICS, 2014
We define the Harmonic energy as the sum of the absolute values of the eigenvalues of the Harmonic matrix, and establish some of its properties, in particular lower and upper bounds for it.
openaire   +1 more source

A statistic study of harmonics and interharmonics at a modern wind-turbine

open access: yes, 2014
The work presents measurements of harmonics and interharmonics from a modern wind turbine over a period of several days, using a conventional power quality monitor.
Kai Yang   +7 more
core   +1 more source

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