Results 291 to 300 of about 1,452,967 (344)
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Voltage control in low voltage systems with controlled low voltage transformer (CLVT)
CIRED 2012 Workshop: Integration of Renewables into the Distribution Grid, 2012The rapidly growing penetration of Germany's distribution grids with all forms of DG causes a high pressure on voltage stability according to several normative guidelines. Beside conventional network reinforcements increasing short-circuit-power, new technical alternatives awake interest.
B. Werther +3 more
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"Semiconductor voltage controllable reactance"
IRE Transactions on Electron Devices, 1955A germanium alloy-junction diode has been developed which is useful as a voltage controlled reactance up to and including ultra high frequencies. Special attention has been paid to electrical losses and lead inductance. Typical performance at 500 mc/s and 6 volts bias is a capacitance of 30 µµfd with a change in capacitance at this voltage of 2 µµfd ...
J. O'Connell, L.J. Giacoletto
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Variable-Unbalanced-Voltage Control
Transactions of the American Institute of Electrical Engineers, 1945SPEED 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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On voltage stability regions and voltage secondary control
PowerTech Budapest 99. Abstract Records. (Cat. No.99EX376), 2003This paper presents some new results on the geometry of the reactive load-flow problem. These results have implications in order to asses the system margin to the voltage collapse and to design a secondary voltage control aimed to avoid the voltage collapse.
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Computer controlled voltage clamp experiments
Annals of Biomedical Engineering, 1973A small digital computer (a Digital Equip. Corp. LINC-8) has been interfaced to voltage clamp control circuitry and a buffer memory in order for it to both control experiments and provide fast and flexible data acquisition. The experiments are designed and run from the computer graphic terminal in a conversational language, offering the experimenter ...
R W, Joyner, J W, Moore
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Science, 2013
Physics Many components of modern devices are based on magnetic effects; magnetic read heads, for example, use the phenomenon known as exchange bias, in which two materials that order magnetically are interfaced, causing the magnetic properties of the ferromagnetic layer (in which spins align parallel to each other) to be affected by the ...
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Physics Many components of modern devices are based on magnetic effects; magnetic read heads, for example, use the phenomenon known as exchange bias, in which two materials that order magnetically are interfaced, causing the magnetic properties of the ferromagnetic layer (in which spins align parallel to each other) to be affected by the ...
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Review of Scientific Instruments, 1968
A voltage controlled 50 Ω attenuator using photoresistors, variable over a range of 1.5 to 10 dB with a 0 to 10 V control voltage, is described. Useful frequency response is dc to 300 MHz, corresponding to a rise time of approximately 1 nsec. The programming speed is limited by the response of an incandescent bulb. The device can handle inputs of up to
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A voltage controlled 50 Ω attenuator using photoresistors, variable over a range of 1.5 to 10 dB with a 0 to 10 V control voltage, is described. Useful frequency response is dc to 300 MHz, corresponding to a rise time of approximately 1 nsec. The programming speed is limited by the response of an incandescent bulb. The device can handle inputs of up to
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A voltage‐controlled resistor for a linear voltage‐controlled oscillator
Electronics and Communications in Japan (Part II: Electronics), 1996AbstractTo realize a linear voltage‐controlled oscillator (VCO), a voltage‐controlled resistor (VCR) whose reciprocal resistance is linear with respect to the control voltage Vcwas fabricated and tested. The VCR was composed of an analog multiplier (AM) and an operational amplifier (OA). The. static effective resistanceReof the VCR varied asR−1e=R−1(1 +
Masahiro Teramura +3 more
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Interaction among voltage controlling devices and voltage control effect identification
Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010This paper presents a method to verify the adequacy of voltage control actions in the operation of electrical systems. The assessment is done through a sensitivity matrix, whose characteristics are presented and discussed. The goal is to identify whether the usual logic of voltage controlling equipment is occurring normally or not.
R. B. Prada, L.J. Souza
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Secondary voltage control of power grid using voltage stability index and voltage control areas
2017 North American Power Symposium (NAPS), 2017This paper presents secondary voltage control of power grid using identification of voltage stability index and voltage control areas. Unlike, the traditional secondary voltage control in North America performed directly by switching capacitor banks and other reactive power sources, in the proposed approach generators are chosen first to perform ...
Rabindra Maharjan, Sukumar Kamalasadan
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