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A new procedure to derive transmission line parameters: Theoretical considerations
(2005-10-31)
The objective of this paper is to show an alternative methodology to calculate transmission line parameters per unit length. With this methodology the transmission line parameters can be obtained starting from the phase ...
Modified barrier method for optimal power flow problem
(2004-12-01)
In this paper is presented a new approach for optimal power flow problem. This approach is based on the modified barrier function and the primal-dual logarithmic barrier method. A Lagrangian function is associated with the ...
An AC voltage regulator with high-power-factor, and control using a FPGA device
(2005-12-01)
This paper presents the analysis, design, simulation, and experimental results for a high frequency high Power-Factor (PF) AC (Alternate Current) voltage regulator, using a Sepic converter as power stage. The control ...
The use of current transformers for noise detection due to sparking in insulators strings in high voltage transmission lines
(2010-12-31)
In a general way, in an electric power utility the current transformers (CT) are used to measurement and protection of transmission lines (TL) 1 The Power Line Carriers systems (PLC) are used for communication between ...
Short-distance part of the interaction of D mesons and nucleons
(2008-12-01)
The short-distance part of the low energy interaction of D-mesons and nucleons is investigated in the context of a quark model. The quark model is based on Coulomb gauge QCD. The model contains a confining Coulomb potential ...
Using the electrochemical impedance spectroscopy to characterize carbon steel in biodiesel medium
(2012-12-01)
Electrochemical impedance spectroscopy measurements using two carbon steel electrodes in soybean biodiesel medium, produced by methylic route, were performed in an electrochemical cell that allows positioning the two ...
Modeling approach based on experimental results for prediction of measurement errors in energy meters
(2009-12-01)
This paper presents a general modeling approach to investigate and to predict measurement errors in active energy meters both induction and electronic types. The measurement error modeling is based on Generalized Additive ...
Proposals for improvement of methodology and process of collecting and analyzing compatibility of power quality indicators in distribution systems
(2011-05-31)
This article aims to present proposals for improvement of key standards and resolutions concerned about the methodology for calculating the indicator of total harmonic voltage distortion, and should contribute to the process ...
Business Models for Flexibility of Electric Vehicles: Evolutionary Computation for a Successful Implementation
(Assoc Computing Machinery, 2019-01-01)
The electrical grid is undergoing an unprecedented evolution driven mainly by the adoption of smart grid technologies. The high penetration of distributed energy resources, including renewables and electric vehicles, ...
Voltage regulator modeling for the three-phase power flow in distribution networks
(2008-12-01)
In this paper a three-phase power flow for electrical distribution systems considering different models of voltage regulators is presented. A voltage regulator (VR) is an equipment that maintains the voltage level in a ...