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An Expert System for Three-Phase Balancing of Distribution Feeders
IEEE Transactions on Power Systems, 2008In this paper, an expert system is designed to derive the rephasing strategy of laterals and distribution transformers to enhance three-phase balancing of distribution systems. The heuristic rules adopted by distribution engineers are incorporated in the knowledge base of the expert system in the problem-solving process.
null Chia-Hung Lin +4 more
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The Use of Support Vector Machine for Phase Balancing in the Distribution Feeder
2008Phase voltage and current unbalances in power system distribution networks are major factors leading to extra losses, communication interference, equipment overloading, and malfunctioning of the protective relay, which consequently results in service quality and operation efficiency being reduced. As a better alternative to the traditional practices of
M. W. Siti +3 more
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LOCAL OPTIMALITY OF MINIMUM PHASE BALANCED TRUNCATION
IFAC Proceedings Volumes, 2002Balanced model truncation has been considered by many authors, since it is a simple and, nevertheless, efficient model reduction technique. In many cases the approximation error may be bounded by a function of the neglected singular values. In this paper the performance of balanced truncation of state space models for ARMA processes is analysed, where ...
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Ring Hybrid Balun with Good Amplitude and Phase Balance
2007 IEEE/MTT-S International Microwave Symposium, 2007We present a ring hybrid balun with additional two lambda/4 short stubs, which offers excellent amplitude and phase balance characteristic. In the proposed scheme, the phase and amplitude imbalance essentially occurred in the conventional ring hybrid is alleviated by a lambda/4 shorted stub and the second stub with a series resistor respectively.
Won Na +4 more
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Distributed real-time phase balancing for power grids with energy storage
2015 American Control Conference (ACC), 2015Phase balancing is of paramount importance for power system operation. We consider a substation connected to multiple buses, each with single phase loads, generation, and energy storage. A representative of the substation operates the system and aims to minimize the cost of all buses as well as balancing loads among phases.
Sun Sun 0001 +3 more
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Simultaneous phase balancing at substations and switches with time-varying load patterns
2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309), 2001Summary form only given, as follows. This paper presents an algorithm for the phase balancing of large-scale unbalanced radial distribution systems. The algorithm recommends rephasing of single- and double-phase laterals in order to improve circuit loss while also maintaining/improving imbalances at various balance point locations.
M. Dilek +3 more
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Phase balancing using mixed-integer programming [distribution feeders]
IEEE Transactions on Power Systems, 1998Unbalanced feeder systems cause deteriorating power quality and increase investment and operating costs. Feeder reconfiguration and phase swapping are two popular methods to balance the systems. For an unbalanced feeder system, feeder reconfiguration is difficult to meet the phase balancing criterion due to the limited number of sectionalizing switches
null Jinxiang Zhu +2 more
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Impedance and phase balancing of mains-frequency induction furnaces
IEE Proceedings B Electric Power Applications, 1983The impedance presented to the supply by coreless and channel induction furnaces used for melting and holding metals is not constant. Many such furnaces are designed for single-phase working and their power supplies often include components to enable a balanced load to be taken from a 3-phase system.
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Induction Machine Phase Balancing by Unsymmetrical Thyristor Voltage Control
IEEE Transactions on Industry Applications, 1985High inrush currents and unbalanced supply voltages are two of the major causes for failure of polyphase induction machines. While thyristor voltage controllers, sometimes called static starters, are in widespread use to limit damaging inrush currents, little attention has been paid to the use of these controllers to balance the phases voltages of the ...
Eduard Muljadi +2 more
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