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Research on Improvement of Line Loss Algorithm Based on Three-phase Unbalance Degree
International Conference on Intelligent Green Building and Smart Grid, 2019Line loss calculation is an important part of power supply company management. However, when the traditional line loss calculation method is used in an area with a relatively unbalanced degree, the calculated theoretical value and actual value will have ...
Xixiu Wu +3 more
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Passive unbalance compensation device for three-phase variable loads
2011 10th International Conference on Environment and Electrical Engineering, 2011This paper describes constitution and design characteristics of a passive unbalance compensator for variable loads in three-phase four-wire industrial installations. Unbalance compensator is integrated by three-phase connections of variable coils and capacitors.
Vicente Leon-Martinez +2 more
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A Three-Phase Optimal Power-Flow Algorithm to Mitigate Voltage Unbalance
IEEE Transactions on Power Delivery, 2013This paper describes a new methodology for three-phase electrical system optimization, in which the phase unbalances are to be taken into account. A formulation for the three-phase optimal power-flow solution was developed using the primal-dual interior point method and the three-phase current injection method in rectangular coordinates.
Leandro Ramos Araujo +3 more
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On the Assessment of Three-Phase Delta Voltages’ Unbalance
2020 Moscow Workshop on Electronic and Networking Technologies (MWENT), 2020Several existing three-phase delta voltages’ unbalance factors, including the "true unbalance factor" (the negative sequence voltage unbalance factor) and its complex form, are considered. New geometric criteria of delta voltages’ balance and unbalance, based on the dealing with delta voltages’ triangles of equal perimeters and different areas are ...
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A Three-Phase Unbalance Adjustment Method Based on Improved K-means Clustering
China International Conference on Electricity Distribution, 2018In the distribution network system, the three-phase unbalance is commonly existed, and the harm caused by it is still very serious. The intelligent phase-change switches mainly regulate the three-phase unbalance by transferring loads in real time, but it
Pan Zhang +6 more
semanticscholar +1 more source
Three-phase active voltage regulator for sag and unbalance compensation
2002 IEEE International Conference on Industrial Technology, 2002. IEEE ICIT '02., 2003Requirements on the power quality of AC sources are becoming more stringent as more voltage-sensitive equipments are being used. Among many power quality issues, voltage unbalance and voltage sags are two serious ones. This paper proposes an active voltage regulator, which is composed of a voltage source fed inverter (VSI) coupled in series with the ...
null Gong Maozhong +3 more
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Characterization of Three-Phase Calibrator for Traceable Measurement of Voltage Unbalance
2021 International Conference on Electrical, Communication, and Computer Engineering (ICECCE), 2021The approach to establishing the metrological traceability of the results of measuring the zero sequence ratio in the conditions of unbalance of the three-phase power supply network is proposed. The standardized definition of this parameter of power quality for the simplification of cumbersome mathematical expressions of processing the obtained results
Valentyn Isaiev, Oleh Velychko
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IEEE transactions on power electronics, 2021
Neutral-point (NP) voltage imbalance is an inherent issue of three-level converters. The alternating input current distortion is generated by using the conventional discontinuous pulsewidth modulation (DPWM) scheme without NP voltage balance control.
Yuhang Zou +7 more
semanticscholar +1 more source
Neutral-point (NP) voltage imbalance is an inherent issue of three-level converters. The alternating input current distortion is generated by using the conventional discontinuous pulsewidth modulation (DPWM) scheme without NP voltage balance control.
Yuhang Zou +7 more
semanticscholar +1 more source
Investigation of line-commutated three-phase converters with impedance unbalance
Proceedings of the 2010 Electric Power Quality and Supply Reliability Conference, 2010Current converters operated in unbalanced electrical three-phase systems will generally work asymmetrically, which causes the appearance of non-characteristic harmonics and therefore higher distortion levels. In this paper unbalances are considered, that are caused by asymmetrical AC-line short-circuit impedances, which are usually a result of ...
M. Weiland, G. Herold, T. Freudenstein
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Considerations on the unbalance regime of the three-phase consumers
2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), 2012The paper deals with an analysis upon the unbalance regime of the three-phase consumers supplied with a sinusoidal voltage system and, upon the voltage and current unbalance indicators. For rapidly calculating the unbalance regime specific indicators, knowing the characteristics of the consumers fed from the three-phase network, a software application ...
Ionel Lepadat +2 more
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