Results 81 to 90 of about 41,086 (208)

Differential Protection of Main Transformer of Doubly-Fed Wind Farm Based on Current Synthesized Vector Trajectory Characteristics

Zhongguo dianli
During the fault ride-through process of the doubly-fed wind farms, the short-circuit current provided by the wind farm side exhibits frequency deviation, which leads to errors in the Fourier algorithm based phasor extraction.
Xupeng SONG, Xiaoyang YANG, Zhengzhen FAN   +2 more
doaj   +1 more source

A New Method of Improving Transformer Restricted Earth Fault Protection

Advances in Electrical and Computer Engineering, 2014
A new method of avoiding malfunctioning of the transformer restricted earth fault (REF) protection is presented. Application of the proposed method would eliminate unnecessary operation of REF protection in the cases of faults outside protected zone of
KRSTIVOJEVIC, J. P., DJURIC, M. B.
doaj   +1 more source

Effects of Numerical Oscillation in Switching of Power Transformer Connected To A Power Network [PDF]

, 2009
This thesis presents a method of modeling nonlinear elements, particularly acceptable in the calculation of low-frequency transformer transients. A program is developed for various variables calculations based on iterations.
Bhatt, Keshav, Pradhan, Om Prakash
core  

Concrete materials : series 1 [PDF]

, 2017
This book provides the various usages of materials for producing good concrete. It will appeal to several major audiences. It is a compilation of works which using different types of material in concrete.

core  

System efficiency of a microwave power tube with a multistage depressed collector [PDF]

The efficiencies of a microwave power tube with a multistage depressed collector and of the power supply driving the tube are computed. An analytical expression for the collector efficiency, which includes the effect of secondary emission and the radial ...
Dayton, J. A., Jr.
core   +1 more source

A program of research and development of low input voltage conversion and regulation First quarterly report, 14 Jun. - 14 Sep. 1965 [PDF]

Switching and circuit studies for development of low input voltage converter and ...
Jenson, K. J., Lingle, J. T.
core   +1 more source

Active elimination of DC bias current of a SiC based dual active bridge by controlling the dead time period

IET Power Electronics
Dual active bridge (DAB) is an isolated DC‐DC converter gaining wider attention in power electronics applications. The high frequency (HF) transformer is an integral part of the DAB which is prone to saturation.
Ganesan Perumal, Kamalesh Hatua, Manju Rajagopal   +2 more
doaj   +1 more source

Application of artificial neural networks for saturation correction in current and voltage transformers

Омский научный вестник
The article investigates the application of artificial neural networks for saturation correction in current and voltage transformers. Under saturation conditions, these transformers can distort signals, leading to the incorrect operation of measuring and
E. A. Temnikov, K. I. Nikitin
doaj   +1 more source

Pseudo-saturating power converter [PDF]

, 1972
Relative performance of three basic configurations of electronic conversion units (saturating, pseudo-saturating, nonsaturating) requiring low power levels is compared.
Agnew, C. V., Radys, R. G.
core   +1 more source

The KELT-South Telescope

, 2012
The Kilodegree Extremely Little Telescope (KELT) project is a survey for new transiting planets around bright stars. KELT-South is a small-aperture, wide-field automated telescope located at Sutherland, South Africa.
David James, Erasmus D. A., Høg E., Joshua Pepper, Keivan Stassun, Pepper J., Robert Siverd, Rudolf B. Kuhn, Zacharias N.   +8 more
core   +1 more source