Results 21 to 30 of about 9,922 (292)
Comprehensive review and a novel technique on voltage unbalance compensation
IET Smart Grid, 2023 Voltage unbalance has gained more attention due to a rapid increase in single‐phase distributed energy resources (DERs) penetration compound with existing unbalance characteristics of low voltage distribution network.
Nattanapong Kongtrakul +2 more
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IEEE Access, 2022 Many unbalanced voltage conditions, which produce different effects on electric equipment, are associated with the same voltage unbalance factor. This fact hinders the precise association between the values of this index and the effects of voltage ...
Marcos D. C. Silva +1 more
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The Journal of Engineering, 2023 The phenomenon of imbalance is a variation of voltage and current waveforms from a perfect sinusoidal waveform, which is considered a crucial challenge in power systems.
Ragab Abd Allah Mahmoud
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Automatika, 2023 This article examines how an innovative Angular Symmetrical Components of Voltages be applied to islanding detection and voltage unbalance factor estimation at a photovoltaic inverter-based distribution unit. Positive and Negative Sequence Components are
V. Arivumani, Sujatha Balaraman
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Voltage unbalancing reduction in a stand-alone ac-dc hybrid microgrid based on floating compensation reference [PDF]
International Journal of Industrial Electronics, Control and Optimization, 2020 A hybrid AC-DC microgrid consists of an AC and a DC subgrid that are connected to each other through an interlinking converter (IC). The main function of an IC under islanded conditions is to transfer power between the two subgrids.
seyed hossein tabatabaei +3 more
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Energies, 2020 This paper presents an efficient strategy for transformer planning to reduce the system losses by means of transformer rearrangement. The customer connected to the distribution transformer are first investigated by the field survey, and the loads of the ...
Chia-Sheng Tu, Ming-Tang Tsai
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Algerian Journal of Signals and Systems, 2019 Voltage unbalance is one of the power quality problems causing a lot of ill effects on induction motors. These are namely: Overheating, line-current unbalance, derating, torque pulsation, and inefficiency.
Fatma Zohra DEKHANDJI, Hamid BENTARZI
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Sensors, 2023 Identifying unbalanced phase currents is crucial for control and fault alarm rates in power grids, especially in urban distribution networks. The zero-sequence current transformer, specifically designed for measuring unbalanced phase currents, offers ...
Shangqing Liang +5 more
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Power factor and unbalance on a polyphase system [PDF]
Journal of the American Institute of Electrical Engineers, 1920 In a single-phase or balanced polyphase circuit, the two factors which are contributory to power factors less than unity are wave distortion and phase displacement between current and voltage. In the paper the influence of wave shape is not considered, since in most large modern systems the wave form is nearly sinusoidal.
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, 2022 International audienceIn France, high-speed railway lines are powered by a 2 × 25 kV/50 Hz electrification system. The substations include two single-phase transformers connected to the high-voltage electrical transmission network on different pairs of ...
Philippe Ladoux +5 more
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