Browsing by Author "El-Hawary, M.E."
Now showing items 1-16 of 16
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A new digital transformation for harmonics and DC offset removal for the distance fault locator algorithm
( Elsevier , 2004 , Article)This paper presents a new application of Park's transformations to identifying the positive sequence of the fundamental components of the three-phase voltage or current signals needed for fault locator algorithm. The problem ... -
A Demodulation Technique For Power System Local Frequency And Voltage Measurements
( Qatar University , 2003 , Article)The demodulation technique of two complex signals is used to estimate the power system local frequency and voltage phasor. The first complex signal is generated from the three-phase voltage waveform by using the ... -
Effects of harmonic distortion on the active and reactive power measurements in the time domain: A single phase system
( IEEE Computer Society , 2001 , Conference)A new application of the least error squares (LES) estimation algorithm is given for identifying, in the time domain, the active and reactive power from available samples of voltage and current waveforms. The digital ... -
Frequency and harmonics evaluation in power networks using fuzzy regression technique
( IEEE Computer Society , 2001 , Conference)A new technique for frequency and harmonic evaluation in power networks is proposed in this paper. This technique is based on fuzzy linear regression and uses the digitized voltage samples, which are fuzzy numbers, to ... -
Frequency and harmonics evaluation in power networks using fuzzy regression technique
( Elsevier , 2003 , Article)A new technique for frequency and harmonic evaluation in power networks is proposed in this paper. This technique is based on fuzzy linear regression and uses the digitized voltage samples, which are fuzzy numbers, to ... -
Fuzzy linear parameter estimation algorithms: A new formulation
( Elsevier , 2002 , Article)In this paper, we present a new formulation of a fuzzy linear estimation problem as one of the linear programming where the objective is to minimize the spread of the data points, subject to constraints on each measurement ... -
Fuzzy time domain and Z-transform for modeling of harmonic electric loads
( IEEE , 2001 , Conference)This paper demonstrates the application of fuzzy systems and Z-transform for electric load modeling in the presence and/or absence of harmonics. The problem is formulated as one of linear optimization, where the objective ... -
Identification of individual types of harmonic loads in an electric power system bus
( Elsevier , 2004 , Article)Some buses in a power system feed power to loads that are sources of harmonics. This type of bus is called a complex bus. This paper provides a new application of the constrained least absolute value algorithm (LAV) to ... -
Identification of individual types of harmonic loads in an electric power system-bus
( Elsevier , 2004 , Article)Some buses in a power system feed power to loads that are sources of harmonics. This type of bus is called a complex-bus. This paper provides a new application of the constrained least absolute value algorithm (LAV) to ... -
Long-term electric peak load forecasting for power system planning: A comparative study
( King Fahd University of Petroleum and Minerals , 2004 , Article)A comparative study between two static estimation algorithms, namely least error squares (LES) and least absolute value (LAV) algorithm was presented. The proposed algorithm used the past history data for the load and the ... -
New Heuristic Strategies for Reactive Power Compensation of Radial Distribution Feeders
( IEEE , 2002 , Article)In this paper, the authors introduce two new heuristic techniques for reactive power compensation in radial distribution feeders. The methods can be considered as generalization ideas that emerged from recent heuristic ... -
On the application of αβ-transformation for power systems frequency relaying
( Institute of Electrical and Electronics Engineers Inc. , 2001 , Conference)This paper presents a new and very accurate algorithm for power system frequency measurement. The proposed algorithm is based on αβ-transformation of the three phase voltages or current waveforms in the relay location, ... -
Park's transformation application for power system harmonics identification and measurements
( Taylor & Francis , 2003 , Article)This paper presents the application of Park's transformation for identifying and measuring power system harmonics. One of the advantages of the proposed technique is that it does not need a model for the harmonics components ... -
Power system frequency estimation based on simulated annealing. Part I: A constant frequency study
( King Fahd University of Petroleum and Minerals , 2003 , Article)In this paper a new algorithm based on Simulated Annealing (SA) method is used to estimate the signal parameters of a system steady power system, having a constant frequency during data window size. The proposed algorithm ... -
Power system frequency estimation based on simulated annealing: A variable frequency model
( Sharif University of Technology , 2004 , Article)This paper presents a new technique for measuring power system frequency, rate of change of frequency and the voltage amplitude and phase angle using the Simulated Annealing (SA) based optimization algorithm. The algorithm ... -
Two digital filtering algorithms for fast estimation of symmetrical components in a power system: A static estimation approach
( Elsevier , 2003 , Article)This paper presents the application of two digital filters working together for fast estimation of power systems symmetrical components. The three-phase unbalanced system is transformed to two phases using α–β-transformation. ...
