Results 31 to 40 of about 64,705 (311)

Hysteresis Parameter Identification of J-A Model Current Transformer Based on Improved Whale Algorithm

open access: yesZhongguo dianli, 2022
The accurate and rapid identification of model parameters is crucial to the simulation of the hysteresis characteristics of current transformer cores based on the J-A hysteresis model.
Yilun LI, Yishu ZHANG, Guang SONG
doaj   +1 more source

The.main types of wind turbines-generators in the power supply system

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2022
THE PURPOSE. This paper considers the problem of relay protection functioning when the current transformer reaches the saturation mode which is provided by transient processes.METHODS. MATLAB Simulink software environment allows reproducing the method of
V. A. Novobritsky, D. S. Fedosov
doaj   +1 more source

Parameter Optimization Design of Light induction Power-taking Device for Transmission Cable

open access: yesJournal of Harbin University of Science and Technology, 2021
Current transformer induction power generation has the advantages of strong practicability, wide range of use and high safety, and it is expected to become the most effective energy supply method for online monitoring equipment of power system ...
LIN Jin-shu   +4 more
doaj   +1 more source

Calculation of 220kV Transformer Bias Current Based on the Earth and Power Grid Model in the Metro Area [PDF]

open access: yesE3S Web of Conferences, 2021
The metro stray current will be generated during subway operation, which will affect the electromagnetic environment near the subway, and then affect the surrounding 220kV transformer.
Chen Lu   +6 more
doaj   +1 more source

Wide Bandwidth and Inexpensive Current Sensor for Power Electronics—An Augmented LEM Current Sensor

open access: yesEnergies, 2021
This paper presents the overall concept of a wideband and cost-effective current sensor. The sensor consists of a paralleled Hall-based current sensor (LEM) and a wideband current transformer (CT).
Maciej Chojowski   +5 more
doaj   +1 more source

Design, analysis and test of a high frequency transformer [PDF]

open access: yes, 2023
openThe progress of power electronics depends heavily on the use of high frequencies. One of the components that has been most affected by this change is the transformer, which can be made with dimensions and weights well below those of conventional low-
CARIOLATO, RICCARDO
core  

Reducing the Impact of the Frequency Change on the Formation of Orthogonal Components of the Relay Protection Input Signals

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2020
Digital filters made with the use of discrete Fourier Transform are applied in most microprocessor protections produced both in the home country and abroad.
E. A. Romaniuk   +3 more
doaj   +1 more source

Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]

open access: yes, 2006
In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Jorge Ramirez   +3 more
core   +1 more source

Development of a system for detecting and locating damaged insulator strings with signals collected at substations

open access: yesIngeniería e Investigación, 2015
This paper presents a novel technique for remotely identifying and locating of damaged insulator strings based on an analysis of noise signals recorded on the ground connection of current transformers installed on transmission line substations.
Renato Massoni Capelini
doaj   +1 more source

High-Frequency Current Transformers Cascade for Power Electronics Measurements

open access: yesSensors, 2022
High-frequency current transformers (HFCT) are widely used to measure fast transient current. Their advantages are simple structure and relatively moderate price.
Maciej Chojowski   +3 more
doaj   +1 more source

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