Results 61 to 70 of about 41,086 (208)
, 1984 The object of the invention is to provide an improved converter for converting one direct current voltage to another. A plurality of phased square wave voltages are provided from a ring counter through amplifiers to a like plurality of output ...
Garrett, H. +3 more
core +1 more source
Influence of current transformer saturation on line current differential protection algorithms
IET Generation, Transmission & Distribution, 2007 The performance of line current differential protection algorithms during current transformer (CT) saturation is analysed. The study covers popularly used algorithms and presents their degree of immunity to CT saturation. The degree of error in phasor measurement due to CT saturation is estimated through simulation studies and this information is used ...
P.K. Gangadharan, T.S. Sidhu, A. Klimek
openaire +1 more source
High Voltage DC Active Current Injection to Simulate Geomagnetically Induced Currents in New Zealand
Space WeatherThis study investigates the effects of geomagnetically induced currents (GIC) on New Zealand's electrical infrastructure via an intentional ground injection of direct current (DC) from a high voltage DC converter station.
Soren Subritzky +11 more
doaj +1 more source
Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation
CSEE Journal of Power and Energy SystemsElectromagnetic current transformer is one of the important pieces of equipment used in AC power system measurement. Due to continuous improvement of current level to be measured in the power system, ordinary single-loop magnetic core structure cannot ...
Wenbo Li +5 more
doaj +1 more source
Excitation and detection circuitry for a flux responsive magnetic head [PDF]
, 1969 Excitation and detection circuitry for flux responsive magnetic ...
Ehrenfeld, D. A.
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Discontinuous Mode Power Supply [PDF]
A document discusses the changes made to a standard push-pull inverter circuit to avoid saturation effects in the main inverter power supply. Typically, in a standard push-pull arrangement, the unsymmetrical primary excitation causes variations in the ...
Lagadinos, John, Poulos, Ethel
core +1 more source
Improved chopper circuit uses parallel transistors [PDF]
, 1966 Parallel transistor chopper circuit operates with one transistor in the forward mode and the other in the inverse mode. By using this method, it acts as a single, symmetrical, bidirectional transistor, and reduces and stabilizes the offset ...
core +1 more source
Streamer evolution arrest governed amplified AC breakdown strength of graphene and CNT colloids
, 2018 The present article experimentally explores the concept of large improving the AC dielectric breakdown strength of insulating mineral oils by the addition of trace amounts of graphene or CNTs to form stable dispersions.
Chattopadhyay, Ankur +3 more
core +1 more source
HeliyonRelay protection and emergency automation is an integral part of electric power systems. The algorithms of the relay protection and emergency automation are based on the use of analysis of the parameters of the electrical mode - current and voltage ...
Ismoil Odinaev +7 more
doaj +1 more source
Modeling of Current Transformers Under Saturation Conditions
Advances in Electrical and Electronic Engineering, 2006 During a short circuit the input signal of the relay can be distort by the magnetic core saturation of the current transformer. It is useful to verify the behavior of CT by a mathematical model. The paper describes one phase and three phase models and it presents some methods of how to analyze and classify a deformed secondary ...
openaire +2 more sources