Results 21 to 30 of about 536 (252)

Study of the state of the issue of increasing the quality of electric energy in the power supply systems [PDF]

E3S Web of Conferences, 2020
This article examines the importance of ensuring the quality of electricity and considers the possibility of using a system for monitoring the quality of electricity in the power supply system. Based on the results of the study, it was found that the use
Karimov Raxmatillo
doaj   +1 more source

Soft‐switching non‐isolated high step‐up three‐level boost converter using single magnetic element

IET Power Electronics, 2021
Here, a soft switched three‐level boost converter with high voltage gain is proposed which is suitable for high step‐up applications with wide output power range.
Hamed Moradmand Jazi, Mahmoud Fekri, Milad Keshani, Ramin Rahimzadeh Khorasani, Ehsan Adib, Patrick Wheeler, Herminio‐Martinez Garcia, Guillermo Velasco‐Quesada   +7 more
doaj   +1 more source

Generalised Tapped Inductor Switcher (GTIS) approach to modelling of high‐order converters

IET Power Electronics, 2021
A generalized modelling technique suited to integrated and high order Pulse‐Width‐Modulation (PWM) topologies is studied and proposed here. Most integrated converters have their switches shared by more than one inductive element. The proposed generalised
Jia Yao, Jiang Ping, Kaisheng Zheng, Alexander Abramovitz   +3 more
doaj   +1 more source

Investigation on gas generation characteristics in transformer oil under vibration

IET Generation, Transmission & Distribution, 2022
Operating experience has shown that characteristic gases can be found in oil‐immersed power transformers and high‐voltage reactors under strong vibration without discharge or thermal faults occurring.
Chong Guo, Qiaogen Zhang, Rui Zhang, Xiaohui He, Zhicheng Wu, Tao Wen   +5 more
doaj   +1 more source

A novel transformerless high step‐Up DC‐DC converter with active switched‐inductor and quasi‐Z‐source network

IET Power Electronics, 2021
Conventional dc–dc boost converters have limited boosting capabilities, and the main switching device may suffer relatively high voltage stress and current stress. A novel transformerless dc‐dc boost converter is proposed in this paper.
Jiawei Zhao, Daolian Chen, Jiahui Jiang
doaj   +1 more source

Simulation and Modeling of Detailed Load flow Analysis for the 400kVA and 132kVA Iraqi Grid

Journal of Engineering, 2023
A load flow program is developed using MATLAB and based on the Newton–Raphson method,which shows very fast and efficient rate of convergence as well as computationally the proposed method is very efficient and it requires less computer memory through ...
Ahmed Abdul Sahib Hashim
doaj   +1 more source

Modular DC‐DC auto‐transformer: Topology, operation, and system design

IET Power Electronics, 2021
Here, a modular DC‐DC auto‐transformer is proposed with a developed scheme of two‐port submodules. The proposed two‐port submodule is composed of six switches and single capacitor, and it is featured with three general working states.
Yang Chen, Han Wang, Miao Zhu, Ming Liu, Xu Cai   +4 more
doaj   +1 more source

SIDO coupled inductor‐based high voltage conversion ratio DC–DC converter with three operations

IET Power Electronics, 2021
Here, a single‐input, dual output (SIDO) coupled inductor‐based high voltage conversion ratio DC–DC converter is proposed. The proposed converter has the capability of operating as a SIDO converter in a way that the terminal of the input voltage source ...
Zahra Saadatizadeh, Pedram Chavoshipour Heris, Ebrahim Babaei, Frede Blaabjerg, Carlo Cecati   +4 more
doaj   +1 more source

Data Analysis Methodology Utilizing the Statistical Metrics Weight of Evidence (WoE) and Information Value (IV) to Assist in Asset Management of Power Transformers

IEEE Access
This article proposes an original contribution to assist in evaluating the condition of power transformers, the main asset of the electrical energy transmission sector. Due to constructive similarity, reactors are also evaluated. Data from the insulating
Gabriela S. Rema, Rafael M. Soares, Benedito D. Bonatto, Antonio C. S. Lima   +3 more
doaj   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source