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A High-Impedance Grounding Fault Identification Method for Mining Cables in Non-Effectively Grounded Systems of Coal Mine Power Grids Based on Steady-State Impedance Analysis-Holmes-Duffing. [PDF]
Sensors (Basel)Feng C, Ni L, Lan Y, Zheng H, Zeng X.
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Dynamic arithmetic optimization algorithm control of distributed generations for demand balancing and enhancing power quality of unbalanced distribution systems. [PDF]
Sci RepEid A, Alsafrani A.
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Assessment of voltage unbalance
IEEE Transactions on Power Delivery, 2001This paper endeavors to present a comprehensive summary of the causes and effects of voltage unbalance and to discuss related standards, definitions, and mitigation techniques. Several causes of voltage unbalance on the power system and in industrial facilities are presented as well as the resulting adverse effects on the system and on equipment such ...
A Von Jouanne
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On the assessment of voltage unbalance
Proceedings of 14th International Conference on Harmonics and Quality of Power - ICHQP 2010, 2010 The management of voltage unbalance in a power system is supported by the knowledge on the contribution of a single unbalanced load/source to the total level of voltage unbalance observed at a Point of Common Coupling (PCC) in an interconnected power system with unbalanced loads distributed all over.
T. E. Seiphetlho, A. P. J. Rens
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Role of dynamic unbalance in dynamics of turbocharger rotors
International Journal of Mechanical Sciences, 2023 Rotating unbalance is one of the key reasons for high vibration levels in turbochargers. The current studies consider the rotating unbalance as a series of static (force) unbalances and acknowledge the importance of their allocation and orientation ...
Luboš Smolik, Stepán Dyk, Jan Rendl
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New Unbalance Factor for Estimating Performance of a Three-Phase Induction Motor With Under- and Overvoltage Unbalance [PDF]
IEEE Transactions on Energy Conversion, 2010 This paper evaluates the influence of the unbalance factors in calculating total copper losses, efficiency, power factor, input power, output torque, peak currents, and derating factor of the motor operating under unbalanced voltage system.
Makbul Anwari, Ayong Hiendro
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Unbalance compensation control in microgrids based on the unbalance profile
Electric Power Systems Research, 2021Abstract Voltage unbalances are a common issue in microgrids (MGs), especially under islanded operation. In these conditions, distributed generators (DGs) can be used as compensating devices. Currently, the compensation techniques based on DGs focus on a specific point of the grid, usually the Point of Common Coupling (PCC) or a Sensitive Load Bus ...
Vinicius P. Suppioni, Ahda Grilo-Pavani
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Graphs and Combinatorics, 2008
The authors present the following nice result: If the unbalance of an intersecting family of sets \( \mathcal{F} \) is defined as \( u(\mathcal{F}) = |\mathcal{F}|-d(\mathcal{F}) \) where \( d(\mathcal(F)=\max|\{F\in\mathcal{F}:x\in F\}| \), where the maximum is taken over all vertices x, then for k-uniform intersecting families \( u(\mathcal{F}) \leqq
Nathan Lemons, Cory Palmer
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The authors present the following nice result: If the unbalance of an intersecting family of sets \( \mathcal{F} \) is defined as \( u(\mathcal{F}) = |\mathcal{F}|-d(\mathcal{F}) \) where \( d(\mathcal(F)=\max|\{F\in\mathcal{F}:x\in F\}| \), where the maximum is taken over all vertices x, then for k-uniform intersecting families \( u(\mathcal{F}) \leqq
Nathan Lemons, Cory Palmer
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Definitions of Voltage Unbalance
IEEE Power Engineering Review, 2001Author Affiliations: Clarkson University, Potsdam, NY; Department of Electrical Engineering, University of Cape Town, South Africa. Abstract: This letter reviews three definitions of voltage unbalance developed by NEMA, IEEE, and the power community, respectively.
P. Pillay, M. Manyage
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