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Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010, 2010
This paper presents the main aspects observed in analyzing Complex Voltage Unbalance Factor (CVUF) behavior resulting from the variation of voltage magnitudes and angles. The goal is to identify possible incoherencies regarding the use of the CVUF, and also to investigate whether this factor is more sensitive to variations in magnitude or angles under ...
A. L Ferreira Filho +5 more
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This paper presents the main aspects observed in analyzing Complex Voltage Unbalance Factor (CVUF) behavior resulting from the variation of voltage magnitudes and angles. The goal is to identify possible incoherencies regarding the use of the CVUF, and also to investigate whether this factor is more sensitive to variations in magnitude or angles under ...
A. L Ferreira Filho +5 more
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Approximate Algorithm for Fast Calculating Voltage Unbalance Factor of Three-Phase Power System
IEEE Transactions on Industrial Informatics, 2014The method of calculating voltage unbalance factor (VUF) recommended by the IEC61000-4-27 has the disadvantage of requiring square root operation. This paper focuses on the fast and accurate calculation of VUF of three-phase power system. The approximate algorithm for calculating the magnitude of the zero, positive, and negative sequences by simple ...
He Wen +4 more
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Voltage Unbalance Factors of Doubly-Fed Wind Generator Based on Big Data Analysis
2020In view of the grid voltage unbalance, wind power generation system (PGS) in the variable speed gearbox, torque ripple of serious harm, unit monitoring data timeliness is strong, large amount of data, so in the process of analysis, also need a unified analysis was carried out on the wind field data, the effective analysis method based on big data is a ...
Na Wang, Lei Wang
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Calculation of voltage unbalance factor in power system supplying traction transformers
2014 Power Systems Computation Conference, 2014The article presents the models of transformers with specially connected windings for supplying catenary systems of high-speed rail. Using the symmetrical components method and equations describing the relationship between voltages and currents on the primary and secondary sides of the transformer one can derive equations describing the value of the ...
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Journal of Renewable and Sustainable Energy, 2022
This study investigates the use of photovoltaic systems to regulate the voltage amplitude of electric power networks and to analyze their impact on the stability of Line Voltage Unbalance Factor (LVUF). It will be shown that instability of the LVUF can occur when single-phase domestic photovoltaic systems equipped with a voltage controller are ...
Youcef Bot +4 more
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This study investigates the use of photovoltaic systems to regulate the voltage amplitude of electric power networks and to analyze their impact on the stability of Line Voltage Unbalance Factor (LVUF). It will be shown that instability of the LVUF can occur when single-phase domestic photovoltaic systems equipped with a voltage controller are ...
Youcef Bot +4 more
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The proposal of a new aggregation time interval for calculating the voltage unbalance factor
Electric Power Systems Research, 2012Abstract When consulting standards that deal with power quality (PQ), it is possible to detect that there are different aggregation time intervals for quantifying voltage unbalance. The choice of the interval to be employed may cause the results of the voltage unbalance factor (VUF) to differ.
João P.J. de Oliveira +2 more
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Fast correction of voltage unbalance factor in three-phase power system using neural network
2018 11th International Symposium on Mechatronics and its Applications (ISMA), 2018The voltage unbalance at the load terminal of three-phase electric power system is discussed. The aim of this work is to solve the problem of voltage unbalance accurately and quickly by using the Neural Network Control (NNC). In this paper, the Aqaba-Qatrana-South Amman (AQSA) power system is considered and modelled as a real case study.
Jasim A Ghaeb +2 more
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Evaluation of voltage unbalance factor for the performance analysis of induction motor
2015 39th National Systems Conference (NSC), 2015This paper presents the evaluation of Complex Voltage Unbalance Factor (CVUF) on the performance of Induction motor. The assessment of motor performance in terms of copper losses, core loss, power factor, input power, efficiency, etc. are presented. Results show that the effect of phase angle of CVUF should be taken into account while calculating, core
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30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004, 2005
This paper presents a unified control scheme for series-type active power filter combined with shunt passive filter to compensate the source voltage unbalance/current harmonics and to correct the power factor simultaneously. The phase angle and the reference voltage for unbalanced voltage/current harmonics compensation are derived from the positive ...
null Jong-Kun Lee +2 more
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This paper presents a unified control scheme for series-type active power filter combined with shunt passive filter to compensate the source voltage unbalance/current harmonics and to correct the power factor simultaneously. The phase angle and the reference voltage for unbalanced voltage/current harmonics compensation are derived from the positive ...
null Jong-Kun Lee +2 more
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Calculation Methods of Voltage Unbalance Factor
2023 24th International Middle East Power System Conference (MEPCON), 2023Ahmed M. El-Bashbishi +1 more
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