Results 291 to 300 of about 62,229 (344)

Quantum light sources with configurable lifetime leveraging parity-time symmetry. [PDF]

Nat Commun
Chen N, Li WX, Fan YR, Li HH, Zeng H, Chi WQ, Zhou H, Li H, You LX, Guo GC, Zhou Q, Xu J, Zhang XL.   +12 more
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All-fiber high-voltage capacitor unbalanced current transformer

Applied Optics, 2021
According to the high-voltage and small-current characteristics for unbalanced current of high-voltage capacitors, a novel fiber optical filter unbalanced current transformer (FU-FOCT) is proposed, where an all-fiber temperature sensor based on the temperature birefringence effect of polarization-maintaining fiber is designed and integrated into an FU ...
Jun Zhao, Shengguo Xu, Xiaohan Sun
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Unbalanced voltage compensation in low voltage residential AC grids

2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
This paper describes the design and test of a control algorithm for active front-end rectifiers that draw power from a residential AC grid to feed heat pump loads. The control algorithm is able to control the phase to neutral or phase to phase RMS voltages at the point of common coupling. The voltage control was evaluated with either active or reactive
Ionut Trintis, Philip J. Douglass, Stig Munk-Nielsen   +2 more
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Voltage Source Converter Control Under Unbalanced Grid Voltage

2021
The conventional control of the voltage source converter (VSC) assumes that the input voltage is balanced. However, unbalanced voltage is a phenomenon that occurs frequently in actual industrial sites. If the grid voltage is unbalanced, THD increases due to voltage negative component, and low harmonic components appear in DC-link voltage, which ...
Ahmed G. Abo-Khalil, Ali M. Eltamaly
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Induction motors on unbalanced voltages

Electrical Engineering, 1936
Characteristics of polyphase induction motors are analyzed in this paper by the method of symmetrical components in a manner different from other recently published articles. The analysis is neither tedious nor highly involved and curves of motor characteristics obtained by tests under unbalanced conditions agree closely with curves obtained by ...
H. R. Reed, R. J. W. Koopman
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Voltage source converter control under unbalanced grid voltage conditions

2017 XXVI International Conference on Information, Communication and Automation Technologies (ICAT), 2017
This paper proposes a novel control method for voltage source converter (VSC) connected to grid under unbalanced voltage conditions. The method is based on utilizing the full control capabilities of the switching converter. The proposed method makes the voltage source inverter (VSI) supply the voltages according to the requirements of the load and/or ...
Akhtar Rasool, Fiaz Ahmad, Asif Sabanovic   +2 more
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Variable-Unbalanced-Voltage Control

Transactions of the American Institute of Electrical Engineers, 1945
SPEED CONTROL of wound-rotor induction motors where the torque is in the same direction as the mechanical rotation may be accomplished with moderate success merely by the use of adjustable resistance in the secondary or rotor circuit, provided the torque being developed by the motor is appreciable. Where the torque must be contrary to the rotation, for
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Transient performance of voltage source converter under unbalanced voltage dips

2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004
Robust operation of voltage source converters under unbalanced voltage dips can be obtained by controlling the positive and negative-sequence currents separately with a dual vector current controller (DVCC). In this paper, the performance of the DVCC is investigated under all voltage dips that can affect the converter.
F.A. Magueed, A. Sannino, J. Svensson
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Unbalanced distribution system voltage optimisation

2016 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe), 2016
Conservation voltage reduction (CVR), the theory that reducing distribution feeder voltages will result in a reduction in demand, has recently been reintroduced with the aim of improving overall energy efficiency. Although CVR is a simple and cost-effective scheme, reducing voltages may not always be the most beneficial decision in terms of reducing ...
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SSC Compensation Capability of Unbalanced Voltage Sags

IEEE Transactions on Power Delivery, 2005
In this paper, the capacity of a static series compensator (SSC) to compensate for voltage sags is discussed, and a complete analysis of the effects of unbalanced sags on the SSC compensation capability is carried out. Expressions are obtained for the missing voltage during unbalanced voltage sags.
F. Fornari, R. Procopio, M.H.J. Bollen
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